CN1095927C

CN1095927C - Method of operating fuel injected engine

Info

Publication number: CN1095927C
Application number: CN97195688A
Authority: CN
Inventors: P·D·麦多维尔; W·赫尔米希; T·D·克拉夫特; C·R·伊尔根斯; W·亨贝格; G·J·宾韦西
Original assignee: Ficht GmbH and Co KG
Current assignee: Ficht GmbH and Co KG
Priority date: 1996-06-21
Filing date: 1997-06-20
Publication date: 2002-12-11
Anticipated expiration: 2017-06-20
Also published as: EP0906498A1; JP2000500207A; WO1997048891A1; AU3716497A; EP0906498A4; CN1222951A; CA2256561A1; AU705755B2

Abstract

A method of operating a two-stroke, spark-ignited internal combustion engine equipped with an ECU (66), an Input/Logic Multiplexer (70), a DC - DC converter (74), an Ignition Trigger (78) and an Ignition Distribution System (86) wherein the ignition is time-base controlled at higher speeds.

Description

The method of operating fuel injected engine

Correlation with related application

It is No.60/020 that the application requires in the serial number of application on June 21st, 1996, the applying date of 490 U.S. Provisional Application.

Note following related application, quote them here as a reference:

The serial number of application is No.08/507 July 25 nineteen ninety-five, 664 application;

The serial number of application was No.06/020 on June 21st, 1996, and 032 name is called the application of " spark coil time lag that internal-combustion engine improves ";

The serial number of application was No.60/020 on June 21st, 1996, and 033 name is called the application of " many sparks capacitor discharge ignition system of internal-combustion engine "; And

The serial number that requirement is attained at application on June 21st, 1996 is No.60/020, the application of the applying date of 490 provisional application.

Background of invention

The present invention relates to the method for operating fuel injected internal-combustion engine, in more detail, relate to the method for operating fuel injected two stroke engine, detailed again says, relates to the shiphoard machinery system that adopts this method.

Summary of the invention

The invention provides a kind of method of operating two-stroke spark ignition internal-combustion engine, this internal-combustion engine comprises a cylinder that limits the firing chamber; The piston that in cylinder, can between top dead center position and bottom dead center position, move; The petrolift and the nozzle assembly of a single combination of using solenoid operation are communicated with the firing chamber; This method comprises the steps: and will not supply with the firing chamber with the air of fuel mix basically, arrives the incident pressurization of top dead center position for piston-advance; With basically not with the petrolift and the nozzle assembly of the low pressure liquid fuel supply of air mixing combination, when low engine speed, the nozzle assembly of the petrolift of operative combination, with directly not importing the firing chamber to be higher than this low fuel pressure and to be higher than basically, therefore in the firing chamber, obtain a kind of stratified charge of finer atomization because of piston reaches the air pressure that air pressurized that top dead center follows produces in the firing chamber with the fuel of air mixing; During engine running, with the spark energy level of regulation, before top dead center position separately first regularly, the nozzle assembly of the petrolift of operative combination, fire fuel; When high engine speeds, to directly not import the firing chamber to be higher than this low fuel pressure and to be higher than basically, thereby in the firing chamber, obtain uniform charge because of piston reaches the air pressure that air pressurized that top dead center follows produces in the firing chamber with the fuel of air mixing; Between the high engine speeds on-stream period, being lower than the spark energy level of afore mentioned rules, before top dead center position separately second regularly, fire fuel, second regularly with the interval of top dead center position greater than first regularly with the interval of top dead center position.

The present invention also provides the operation two-stroke, the method for spark ignition internal-combustion engine, and this internal-combustion engine comprises a cylinder that limits the firing chamber, the piston that can move between the bottom dead center position of top dead center position in cylinder; Single petrolift and the nozzle assembly of using the combination of solenoid operation is communicated with the firing chamber; This method comprises the steps: and will not supply with the firing chamber with the air of fuel mix basically, arrives the incident pressurization of top dead center position for piston-advance; With basically not with the petrolift and the nozzle assembly of the low pressure liquid fuel supply of air mixing combination; During time of engine low speed, the petrolift of operative combination and nozzle assembly, with directly not importing the firing chamber to be higher than this low fuel pressure and to be higher than basically, therefore in the firing chamber, obtain a kind of stratified charge of finer atomization because of piston reaches the air pressure that air pressurized that top dead center follows produces in the firing chamber with the fuel of air mixing; During time of engine low speed, with the spark energy level of regulation, with timing fire fuel based on the time lag behind the burner oil; Between the high engine speeds on-stream period, the nozzle assembly of the petrolift of operative combination, to directly not import fuel chambers to be higher than this low fuel pressure and to be higher than basically, thereby in the firing chamber, obtain uniform charge because of piston reaches the air pressure that air pressurized that top dead center follows produces in the firing chamber with the fuel of air mixing; Between the high engine speeds on-stream period, being lower than the spark energy level of afore mentioned rules, and with the timing fire fuel based on the crank angle.

The present invention also provides a kind of operation two-stroke spark ignition internal-combustion engine, and this internal-combustion engine comprises a cylinder that limits the firing chamber; The piston that in cylinder, can between top dead center position and bottom dead center position, move; The nozzle assembly of the petrolift of single combination with solenoid operation is communicated with the firing chamber and is controlled by engine throttle; This method comprises the steps: and will not supply with the firing chamber with the air of fuel mix basically, arrives the incident pressurization of top dead center position for piston-advance; With basically not with the nozzle assembly of the petrolift of the low pressure liquid fuel supply of air mixing combination; When engine throttle is adjusted in about 15% aperture or is lower than this aperture, the petrolift of operative combination and nozzle assembly, to directly not import the firing chamber to be higher than this low fuel pressure and to be higher than basically, thereby in the firing chamber, obtain a kind of stratified charge of finer atomization because of piston reaches the air pressure that air pressurized that top dead center follows produces in the firing chamber with the fuel of air mixing; When engine throttle is adjusted in about 15% aperture or is lower than this aperture, with the spark energy level of regulation, and with the timing fire fuel based on the time lag behind the burner oil; When engine throttle is adjusted in greater than about 15% aperture, the petrolift of operative combination and nozzle assembly, to directly not import the firing chamber to be higher than this low fuel pressure and to be higher than basically, thereby in the firing chamber, obtain uniform charge because of piston reaches the air pressure that air pressurized that top dead center follows produces in the firing chamber with the liquid fuel of air mixing; When engine throttle is adjusted in greater than about 15% aperture, to be lower than the spark energy level of afore mentioned rules, with timing fire fuel based on the crank angle.

The present invention also provides a kind of method of operating two-stroke spark ignition internal-combustion engine, and this internal-combustion engine comprises a cylinder that limits the firing chamber; The piston that in cylinder, can between top dead center position and bottom dead center position, move; The combustion pump and the nozzle assembly of single combination with solenoid operation are communicated with the firing chamber and are controlled by engine throttle; This method comprises the steps: and will not supply with the firing chamber with the air of fuel mix basically, arrives the incident pressurization of top dead center position for piston-advance; The petrolift and the nozzle assembly of combination will do not supplied with the low-pressure fuel of air mixing basically; When engine throttle is adjusted in about 15% aperture or during less than this aperture, the petrolift of operative combination and nozzle assembly, with directly not importing the firing chamber to be higher than this low fuel pressure and to be higher than basically, therefore in the firing chamber, obtain a kind of layering component of finer atomization because of piston reaches the air pressure that air pressurized that top dead center follows produces in the firing chamber with the fuel of air mixing; When engine throttle is adjusted in about 15% aperture or during less than low aperture, with the given above-mentioned spark energy level that is lower than, with the timing based on the time lag behind the burner oil, fire fuel; When engine throttle is adjusted in about 15% to 100% aperture, the petrolift of operative combination and nozzle assembly, to directly not import the firing chamber to be higher than this low fuel pressure and to be higher than basically, thereby in the firing chamber, obtain uniform charge because of piston reaches the air pressure that air pressurized that top dead center follows produces in the firing chamber with the fuel of air mixing; When engine throttle is adjusted between about 15% to 100% aperture, to be lower than the spark energy level of this regulation spark energy level, with the timing based on the crank angle, fire fuel.

The present invention also provides a kind of operating method of internal-combustion engine, comprise the steps: to obtain the internal-combustion engine of a two-stroke, spark ignition, this internal-combustion engine comprises a cylinder that limits a firing chamber, the piston that in cylinder, can between top dead center position and bottom dead center position, move, this machine also comprises the petrolift and the nozzle assembly of single combination with solenoid operation, is communicated with the firing chamber and is controlled by engine throttle; To not supply with the firing chamber basically, arrive the incident pressurization of top dead center position for piston-advance with the air of fuel mix; The petrolift and the nozzle assembly of combination will do not supplied with the low-pressure fuel of air mixing basically; Under big aperture situation of throttle valve and engine peak speed, the nozzle assembly of the petrolift of operative combination, from 215 ° of piston arrives top dead center precontracts during 130 °, with with the acutangulate angle of cylinder-bore axis, to directly not import the firing chamber to be higher than this low fuel pressure and to be higher than basically, thereby in whole firing chamber, obtain to have uniformly the fuel droplet charge of large-size because of piston reaches the air pressure that air pressurized that top dead center follows produces in the firing chamber with the fuel of air mixing; In the big aperture situation of throttle valve and under engine peak speed, during about 7 °, produce 1 to 3 spark, the nozzle assembly fire fuel of the petrolift of operative combination from 28 ° of piston arrives top dead center precontracts; In throttle valve 15% aperture situation and in engine speed is under about 200 rev/mins, from 56.4 ° of piston arrives top dead center precontracts during about 14 °, with with the acutangulate angle of cylinder-bore axis, to directly not import the firing chamber to be higher than this low fuel pressure and to be higher than basically because of piston reaches the air pressure that air pressurized that top dead center follows produces in the firing chamber with the fuel of air mixing, thereby obtain the fuel droplet stratified charge of finer atomization near top of combustion chamber, its size is less than the large scale fuel droplet of even charge; In 15% throttle valve opening situation and engine speed is under about 200 rev/mins, during about 14 °, produces 10 to 15 sparks, fire fuel 51.9 ° of piston arrives top dead center precontracts.

When reading following detailed description and accompanying drawing, the people that are proficient in present technique can know other characteristics of the present invention and advantage.

Brief description

After together with the detailed description of considering following preferential embodiment, these and other characteristics of the present invention can be disclosed more fully, the wherein identical identical part of label representative:

Fig. 1 is a side view of implementing shiphoard machinery system of the present invention;

Fig. 2 is a part drawing in side sectional elevation of implementing internal-combustion engine of the present invention;

Fig. 3 is the block diagram of this ignition system of internal combustion engine;

Fig. 4 is the detail drawing of the input/Logical Multiplex modulator of this ignition system;

Fig. 5 is the detail drawing of the DC-DC converter of this ignition system;

Fig. 6 is the detail drawing of these ignition system igniting trigger circuit;

Fig. 7 is the detail drawing of this ignition system igniting distributor circuit;

Fig. 8 is included in the detail drawing of the post ignition circuit of the internal-combustion engine in the shiphoard machinery system shown in Figure 1;

Fig. 9 is the time plot of the time coordinate relation of each electronic signal in the expression post ignition circuit;

Figure 10 is the electric diagram of the post ignition circuit that uses with the internal-combustion engine with 6 cylinders of expression;

Figure 11 is expression Figure 10 engine ignition form regularly, with the budc number of degrees (DBTDC) metering, is drawn into the function of the throttle valve position of engine speed;

Figure 13 is the form that spark coil regularly is depicted as the function of engine speed and throttle valve position;

Figure 14 is expression Figure 10 engine igniting coil form regularly, measures with microsecond (MS), and plots the function of engine speed and throttle valve position;

Figure 15 is the form in expression Figure 10 engine spray burst length, measures with microsecond (MS), and plots the function of engine speed and throttle valve position;

Figure 16 is expression Figure 10 motor carries out the transition to crank angle coordinate igniting from the time coordinate igniting a plotted curve.

Before describing one embodiment of the present of invention in detail, should be appreciated that the CONSTRUCTED SPECIFICATION that the present invention is not restricted to mention or expression in the accompanying drawings and the application of arrangements of components in following explanation.The present invention can pass through other embodiments, and implements or finish with various mode.Should also be understood that term or term that this paper adopts are to be considered to restriction for purposes of illustration and not.

Preferential embodiment describes in detail

Embody shiphoard machinery system of the present invention and be shown in Fig. 1, it comprises outer drive unit of a string or power plant 5, be suitable for being installed on the stern framing 6 of ship, do the swing that pivots around the axis of oscillation 8 of an approximate horizontal with respect to stern framing, and turn to swing with respect to stern framing around the steer axis 11 of an approximate vertical.Drive unit or power plant 5 comprise that a propeller shaft 13, one propulsion devices 15 are fixed thereon.Drive unit or power plant 5 also comprise a burner oil, two stroke IC engine 10, are connected in propeller shaft 13 through a common chain 17 by driving relationship.In preferential embodiment of the present invention, motor 10 is one 6 cylinder V-type engines.Yet, should be appreciated that the present invention can be applicable to have its pattern motor of any amount cylinder.

In Fig. 2, very at length internal-combustion engine 10 has been represented in the part.Though any internal-combustion engine is fit to, yet this preferential embodiment's internal-combustion engine 10 all is a two-stroke, toroidal swirl type internal-combustion engine, has 6 cylinders (simply represent in Fig. 7, and be marked with 1-6).A representational cylinder of motor 10 is shown in detail in Fig. 2.

More particularly, motor 10 comprises a crank box 14, and the latter limits a crank box chamber 18, one bent axles 22 and rotates therein.Cylinder body 26 limits some cylinders 7 (one of them is shown), and each cylinder has an axis 9.Cylinder body 26 also limits a

suction port

30, and 34 are communicated with cylinder 7 and crank box chamber 18 through the gas transmission road.Cylinder body 26 also limits a relief opening 38.Piston 42 can move back and forth between upper and lower dead-centre position in cylinder 1, is connected in bent axle 22 through a crank pin 46 by driving relationship.One cylinder head 50 is sealed on the upper-end surface of cylinder 7, thereby limits a firing chamber 54.One spark plug 58 is installed on the cylinder head 50, and it stretches into firing chamber 54.

Motor 10 also comprises a fuel injector 60 that is installed on the cylinder head 50, in order to fuel is sprayed into the upper end of firing chamber 54.The fuel injector and the nozzle assembly of the combination that this preferential fuel injector 60 is solenoid operations, the serial number that is disclosed in application on July 25 nineteen ninety-five is No.08/506, in the U.S. Patent application that 534 are called " the pressure pulse petrolift and the nozzle sets of combination ", here by with reference to being introduced into.

Fuel injector 60 will be basically not with the injected fuel spray of air mixing in firing chamber 54, and form an injected fuel spray cone 61 of surrounding by a large amount of fuel fumes, the center of this cone is on cylinder-bore axis 9.Best, whole basically injected fuel spray cone 61 is this piston 42 of bump before any other surface of bump.Injected fuel spray cone 61 (low degree) in the plane that comprises this cylinder or cone axis 9 has an outer surface that constitutes straight line 65, and this line 65 and cylinder or cone axis 9 constitute an acute angle, shown in and be about 15 ° in the preferential structure.

Motor 38 also comprises a fuel source, i.e. fuel tank (not shown) and a fuel supply system (not shown); In order to will be basically not with each fuel injector 60 of the fuel supply motor 10 of air mixing.This fuel supply system comprises a petrolift (not shown), be communicated between fuel tank and the fuel injector 60, in order to will be not with the fuel of air mixing with lower pressure feed fuel injector 60.If need, can not comprise basically being less than about 1% lubricant oil with the liquid fuel of air mixing.The serial number that this preferential fuel supply system is disclosed in July 25 nineteen ninety-five application is No.08/507, in the U.S. Patent application that 135 are called " fuel oil of the mixing of internal-combustion engine and lubricating oil oil pump ", here is introduced into by reference.

Shown in Fig. 3 was simple, internal-combustion engine 10 also comprised an ignition system 62, in order to provide ignition spark to spark plug 58, with the fuel in the gas cylinder 1-6.Ignition system 62 shown in Fig. 3 can be used to have in the internal-combustion engine of any amount cylinder.In preferential embodiment of the present invention, ignition system 62 produces some ignition sparks (every cylinder, every circulation) when being sprayed into fuel in the cylinder by layering, and when being sprayed into fuel charge in the cylinder when being uniform state, just produce more a spot of spark (every cylinder, every circulation).

In general, ignition system 62 comprises an electronic control unit (ECU) 66, an input/Logical Multiplex modulator 70 (being illustrated among Fig. 4 in detail), a DC-to-DC (DC-DC) transducer 74 (being shown in detail among Fig. 5), igniting trigger circuit 78 (being shown in detail among Fig. 6), 82 and igniting distributor circuits 86 of a silicon controlled rectifier (SCR) (being shown in detail among Fig. 7).

Can utilize any ECU of internal-combustion engine to come operating point ignition system 62.ECU66 produces an ignition control signal corresponding to each cylinder of motor.Among the embodiment of the motor in the accompanying drawings, this motor is 6 Cylinder engines, and therefore, ECU66 correspondingly produces 6 ignition control signals, and promptly corresponding to each cylinder in 6 cylinders, each engine cycles produces an ignition control signal.Spark ignition regularly is to be controlled by any proper device that is included in the electronic control unit 66.

Fig. 4 represents the input/Logical Multiplex modulator 70 of ignition system 62.As shown in Figure 4, be imported into

incoming line

90,94, the input/Logical Multiplex modulator 70 on 98,102,106 and 110 from the ignition control signal (corresponding to the 1-6 cylinder) of ECU66.

Input line

90,94,98,102,106 and 110 are connected to inverter 114,118, and 122,126,130 and 134.Inverter 114,118,122,126,130 and 134 have output terminal 138,142 respectively, and 146,150,154 and 158.Output terminal 138,142 and 146 is connected in disjunction gate 162, and output terminal 150,154 and 158 is connected in disjunction gate 166.Correspondingly, disjunction gate 162 and 166

output terminal

170 and 174 are connected in disjunction gate 178 and disjunction gate 182.Input/Logical Multiplex modulator 70 also comprises a delay line 190 that is connected in the output terminal 194 of disjunction gate 178.This delay line 190 comprises resistor R 24, diode D10, capacitor C1 and resistor R 1.The output terminal of this delay line is connected in the input end of disjunction gate 182, with compound or multichannel modulation intactly from the ignition control signal of ECU66.The output terminal of disjunction gate 182 is connected in NOT-AND gate 186.

Fig. 5 represents the DC-DC transducer 74 of ignition system 62.DC-DC transducer 74 comprises a pulse-width modulator 206.This pulse-width modulator 206 is common parts, can buy from many MANUFACTURER there.In this preferential embodiment, this pulse-width modulator 206 is by National Semiconductor, and Inc. makes, and indicates part number LM2578.As shown in Figure 5, by comprising resistor R 2, R14 and R15, the RC circuit of capacitor C6 and C7 are connected in the vibration input end 202 of pulse-width modulator 206 (lead ends 3 of LM 2578 chip cards) to the output terminal 198 of NOT-AND gate 186 through contact B.This pulse-width modulator 206 also comprises an inverter input 208 (lighting outlet 1 of LM2578 chip card).In this preferential embodiment, the lighting outlet 5 of LM2578 chip card and 7 ground connection.This pulse-width modulator 206 also has an output terminal 210 (lighting outlet 6 of LM2578 chip card), through NOT-AND gate 214, and through comprising resistor R 13, R53, the resistor network of R17 and diode D18 is connected in insulation gating diode transistor (IGBTS) Q1, the storage element of the parallel connection of Q2 and Q3.

As shown in drawings, IGBTS Q1, Q2 and Q3 comprise the control utmost point 218,222 and 226, drain electrode 230,234 and 238 and the power supply utmost point 242,246 and 250 respectively.The control utmost point 218,222 and 226 is connected in the output terminal of NOT-AND gate 214 through resistor network, and drains 230,234 and 234 respectively through resistance R 20, and R21 and R22 are connected in an end 254 of the elementary winding 258 of matrix transformer 262.The power supply utmost point 242,246 and 250 is through resistors in series R11 and R10 ground connection, and also is connected in the inverter input 208 of pulse-width modulator 206.

The end opposite 264 of elementary winding 258 is connected in voltage source+V.In preferential embodiment of the present invention, voltage source+V is the output terminal of internal-combustion engine alternator (not shown).Matrix transformer 262 also comprises level winding 266 one time, one end 270 ground connection, and the other end 274 is connected in the ignition capacitor C10 of diode D9 through diode D8.Ignition capacitor C10 is connected in the plate 278 of SCR 82.In this preferential embodiment, this transformer is a kind of 1: 2 matrix transformer that boosts.Matrix transformer is that prior art is known, in U.S. Patent No. 4,665, diagram and explanation is arranged in 357 and No.4,845,606, by with reference to being incorporated in this.

Fig. 6 represents the igniting trigger circuit 78 of ignition system 62.It comprises a disjunction gate 282, and its

input end

286 and 290 is connected in the output terminal of disjunction gate 178 through contact A.The RC circuit of the output terminal 294 of disjunction gate 282 through comprising capacitor C28 and resistor R 16 is connected in the first input end 298 of disjunction gate 302.Second input end 306 of disjunction gate 302 is through disjunction gate 310, comprise capacitor C29 and resistor R 48, the RC circuit of NOT-AND gate 314 reaches by resistor K49, and the RC circuit that capacitor C3 and resistor 50 are formed is connected in the output terminal 210 of pulse-width modulator 206.The output terminal 318 of disjunction gate 302 is connected in the input end 322 of NOT-AND gate 326.Another input end 330 of NOT-AND gate 326 is connected in the output terminal of disjunction gate 178 from input/Logical Multiplex modulator 70 through contact A.The RC circuit of the output terminal 334 of NOT-AND gate 326 through comprising resistor R 52 and R52 and capacitor C31 is connected in the elementary winding 338 (only being shown in Fig. 5) of insulating transformer 342 (being shown in Figure 4 and 5).The secondary windings 346 of insulating transformer 342 (only being shown in Fig. 4) is parallel to the triggering control panel 350 of diode D31 and SCK 82.The negative electrode 354 of SCR 82 is connected in the igniting distributor circuit 86 of ignition system 62 through contact D.

Fig. 7 represents the igniting distributor circuit 86 of ignition system 62.This igniting distributor circuit 86 comprises igniting triggering command group 358,362,366,370,374 and 378, corresponds respectively to internal-

combustion engine

1,2,3,4,5 and 6 each cylinder.Each instruction group is identical, therefore, only describes instruction group 358 in detail.The negative electrode of SCR 82 is connected in the anode of SCR 386.The input end 390 of instruction group 358 is connected in ECU 66, to receive the ECU ignition control signal of cylinder 1.The RC circuit of this input end 390 through comprising resistor R 45 and capacitor C12 is connected in the base stage 394 of transistor Q4.Transistor Q4 comprises an emitter 398 that links to each other with supply voltage 402 and the collector electrode 406 through resistor R 46 ground connection.Collector electrode 406 is through comprising resistor R 47, diode D6, and the RC circuit of capacitor C22 and resistor R 12 also is connected in the control utmost point 410 of SCR 386.SCR 362 comprises a negative electrode 414, and the latter is connected in capacitor C22 and resistor R 12, and is connected in the spark plug 58 in the cylinder 1.

Although can adopt other element and planning, the resistor and the capacitor that adopt in this preferential embodiment have following standard:

The R1-510 kiloohm, 1/8 watt;

R2-R8, R14, R18, R24-1 kiloohm, 1/8 watt;

R10, R11, R20-R22-0.01 ohm, 2 watts;

R12, R28, R32, R36, R40, R44-100 ohm,

1/8 watt

R13, R53-47 ohm, 1/4 watt;

R15, R17-24 ohm, 1/8 watt;

The R16-82 kiloohm, 1/8 watt;

R19，R26，R30，R34，R38，R42，R46-10

1/8 watt of kiloohm,

R25, R29, R33, R37, R41, R45-3.3 kilo-ohm

Nurse, 1/8 watt;

R27, R31, R35, R39, R43, R47-56 ohm,

1/8 watt;

The R48-249 kiloohm, 1/8 watt;

The R49-5.1 kiloohm, 1/8 watt;

The R50-750 kiloohm;

R51, R52-150 ohm, 1/8 watt;

C1, the C28-C30-0.001 microfarad

C2, C4, C5-100 micromicofarad

The C3-330 microfarad

The C6-4700 micromicofarad;

C7, C8, C9, C11-C13, C15-0.022 microfarad

The C10-0.68 microfarad;

C14, C17-C24, C31-C36-0.1 microfarad

C16, the C25-100 microfarad

Specific gate, diode, SCR, the selection of transistor and other element (adopting in ignition system 62) is to be in the ordinary person's who is proficient in present technique the ken.

In operation, each

input end

90,94,98,102,106 and 110 is in high level (be generally 5 volts, be referred to as " height " or " logical one ") usually.In order to produce an ignition control signal at each

input end

90,94,98,102,106 or 110, ECU66 " draws " low level (be generally zero shape, be referred to as " low " or " logical one ") with this input

end.Input end

90,94,98,102,106 and 110 is respectively through the inverter inversion, and the output of inverter is by disjunction gate 162,166,178 and 183 compound or multichannel modulation, and by NOT-AND gate 186 bufferings, for input DC-DC transducer 74.The also delayed circuit 190 of the output of OR-gate 178 is input to igniting trigger circuit 78 and OR-gate 182.Delay circuit 190 time that produces lags behind, even to allow pulse-width modulator still can continue operation after ignition control signal turns back to high-end trim owing to the period 1.This has guaranteed that ignition capacitor C10 keeps charged state, with the cycle of beginning electric current, promptly guarantees " to be in low level " from next ignition control signal of ECU66 this moment.

According to the output of input/Logical Multiplex modulator 70 (from " and with non-" door 186), pulse-width modulator 206 produces an oscillator signal at its output terminal, its frequency is approximately 3500 hertz (HZ).This oscillator signal is with 3500 hertz of driving transistors Q1, and Q2 and Q3 make the elementary winding 258 that passes through matrix transformer 262 from the electric current of alternator.

The rapid conversion of electric current of matrix transformer 262 of flowing through has produced a flyback voltage, through multiplication, and by the interacting of matrix transformer 262, is transferred to the secondary windings 266 of matrix transformer 262.The voltage that appears on the secondary windings 266 is approximately 200 to 300 volts.This voltage was stored by ignition capacitor C10 moment, till ignition capacitor C10 discharges by the triggering of SCR 82.

Through elementary 258 electric current of matrix transformer 262, the inverter input 208 that is added to pulse-width modulator 206 by means of the voltage that is placed in current sensing resistor R10 and R11 in this current circuit and will stride horizontal resistor R10 and R11 detects.The width of pulse-width modulator output terminal 210 changes like this according to this voltage or modulates, and makes ignition system 62 effective in the broad range of alternator voltage, and promptly in this preferential embodiment, this effective voltage scope is approximately 8 volts to 30 volts.In fact, when low alternator voltage, the pulse width of pulse-width modulator 206 output terminals 210 increases, and to guarantee that sufficient charging voltage is arranged, uses for ignition capacitor.Along with the rising of alternator voltage, the pulse width of pulse-width modulator 206 output terminals 210 is dwindled.In the at first stage of one-period, produce by igniting trigger circuit 78 for SCR 82 initial trigger impulses, because pulse-width modulator 206 does not have output terminal 210 to trigger SCR 82.After initial trigger process, the pulse-width modulator output terminal 210 that is connected in SCR 82 through igniting trigger circuit 78 is used to the discharge of trigger point thermoelectricity container C 10.

Be imported into the suitable igniting distribution instruction group of igniting distributor circuit 86 from the ignition control signal of ECU 66.When ECU 66 produced specific ignition control signal, this ignition control signal just triggered the SCR of corresponding igniting distribution instruction group, and that SCR " maintenance " disconnection is disconnected by ECU 66 up to this ignition control signal.As long as this igniting distribution instruction group SCR maintenance disconnects, the energy that is charged by ignition capacitor C10 is just directly transmitted through spark coil 59 (Fig. 2) or with the continuous spark plug 58 (Fig. 1) of that igniting distribution instruction group.

This ignition system such as engine speed, load, throttle valve position or the like, can produce the ignition spark of variable number according to the present invention's operating mode that respectively turns round on spark plug, to increase or to reduce summation spark perdurabgility.Though, according to circumstances, various combinations as desirable total spark perdurabgility of the function of the various running operating modes of motor are suitable, yet desirable total spark of this preferential embodiment can be determined as the function of engine speed and throttle valve position perdurabgility.In addition, under stratified charge engine running operating mode generation a large amount of sparks aspect the present invention be described suddenly, yet, under stratified charge engine and running operating mode, also can be with the combining form generation high energy level of long spark duration or high spark voltage or long spark duration, high spark voltage and a large amount of sparks.

Internal-combustion engine 10 also comprises a time delay circuit 426 (Fig. 8), produces spark so that spray in the firing chamber 54 back at fuel in the cylinder 7 in a certain predetermined moment.As shown in Figure 8, time lag, firing circuit 426 comprised a microprocessor 430, and the latter has data output end 434, sprayed indicator output terminal 438 and produced spark output terminal 442.As described below, microprocessor 430 produces some spark signals at its output terminal 442.Yet, should be appreciated that these spark signals can be produced such as an ECU by another suitable element.Circuit 426 also comprises a timer 446, and the latter has the data input register 450 of one 8 byte, receives timing information for the data output end 434 from microprocessor 430 and uses.Timer 446 also has a trigger input end 454, is connected in the injection indicator output terminal 438 of microprocessor 430, so that receive an indication when by the signal of a course of injection of microprocessor 430 beginnings on microprocessor 430.Timer 446 also comprises pulse output terminal 458 when certain.

Post ignition circuit 426 also comprises an AND gate 462 with two input ends 466 and 470 and output terminals 474.The input end 466 of AND gate 462 is connected in the output terminal 458 of timer 446.The input end 470 of AND gate 462 is connected in microprocessor 430, so that receive one from the spark generation signal that produces spark output terminal 442 on microprocessor 430.The output terminal 474 of " with door " 462 is connected in spark coil 59 (simply being shown in Fig. 2), so that in cylinder 7, produce spark, and the fuel in the some gas cylinder 7.

On-stream, when course of injection takes place when, timer 446 output terminal 438 from microprocessor 430 on its triggering input end 454 receives an injection control signal (referring to the label among Fig. 9 478), and according to this injection control signal, according to the microprocessor CLK clock, begin to count this clock pulse.As long as this timer counting does not also stop, timer 446 just produces a strong signal or timing signal (referring to the label 482 of Fig. 9) at its output terminal 458.When microprocessor 430 produces this spark signal (seeing label 486 among Fig. 9) at its output terminal 442, and when this spark signal was received on the input end 470 of AND gate 462, AND gate 462 just produced an output or a fire signal or is transferred to the electric current (seeing the label 490 among Fig. 9) of spark coil 59 on its output terminal 474.When output 458 step-downs (seeing label 498 among Fig. 9), output 474 is step-down (seeing the label 490 among Fig. 9) just.When output 474 when high, the electric current of the spark coil of flowing through just increases.When the timer counting that receives from microprocessor stopped, output 458 is step-down just, made output 474 step-downs, and microprocessor 430 indications this moment, needed time sum is over and done with behind this course of injection certainly.Because the electric current in an inductor coil or spark coil can not change (V=L (di/dt)) instant, therefore, the electric current of spark coil is carried suddenly to change the voltage on the spark coil is raise rapidly, thereby produces a spark that makes ignited fuel in the cylinder 7.Be the motor that adaptation has the various sizes of varying number cylinder, the post ignition circuit 426 of Fig. 8 can be repeated many times by cylinder number.

Though can use firing circuit at any rotating speed, yet preferably in low speed or idling, promptly per minute 200 to 2000 speeds of crankshaft (RPM) use firing circuit 426, and have shown already, and are good especially in the rotation speed operation that is low to moderate 2000RPM.Be higher than the rotating speed of 2000rpm, preferably adopting common ignition system based on crank angle.In two kinds of situations of the motor 10 in common internal combustion engine and in the accompanying drawings, the timing that spark produces signal under this rotating speed is only according to the crank angle of bent axle.Yet in the prior art, this spark produces signal and directly receives spark coil, and directly excites this ignition spark and need not any other signal.Consequently the crank angle is depended in the timing of prior art igniting process, rather than puts the absolute time of calculating by regular time.On the contrary, in firing circuit 426, produce igniting and always occur in the scheduled time value that occurs behind the course of injection, and this scheduled time value not the crank angle according to bent axle.Fuel injection process produces fuel injection signal on the output terminal 442 of microprocessor 430.When this can appear at the fuel injector energy supply, also can appear at when fuel is actual to spray in the cylinder 7.

Figure 10 represents a post ignition circuit that is applicable to 6 cylinder engines.Identical parts are with identical labelled notation.Replace Fig. 8 circuit 426 to repeat 6 times, each signal of embodiment shown in Figure 10 compound (multichannel modulation) is to reach the Economy of using electronic unit.

As shown in figure 10, circuit 500 comprises a timer 504, the latter has one 8 Bit

data input register

508,3 respectively corresponding to the trigger input end 512,516 and 520 of

cylinder

1 and 4,2 and 5 and 3 and 6, an input end of

clock

524,3 respectively corresponding to the output terminal 528,532 and 536 of trigger input end 512,516 and 520.Circuit 500 also comprises the disjunction gate 540,544 and 548 that has output terminal 552,556 and 560 respectively, and they are connected in trigger input end 512,516 and 520 respectively.OR-gate 540,544 and 548 also comprises input end 564 and 568,572 and 576 respectively, and 580 and 584, and these input ends are connected in microprocessor 430, with receive indication in the cylinder of regulation, occur course of injection the injection output signal.In other words, microprocessor is at output terminal 588,592, and 596,600,604 and 608 produce output signal, occurs respectively spraying in

cylinder

1,4,2,5,3 and 6 with indication.

Post ignition circuit 500 also comprises AND gate 612,616 and 620, they have be connected in timer output terminal 528,532 and 536 respectively respective input to 624,628 and 632, and have corresponding output terminal 636,640 and 644.Post ignition circuit 500 also comprises: AND gate 648 has 652, one input ends 656 of input end and an output terminal 660 that is connected in AND gate 612 output terminals 636; AND gate 664 has 668, one input ends 672 of input end and an output terminal 676 that is connected in AND gate 616 output terminals 640; AND gate 680 has 684, one input ends 688 of input end and an output terminal 692 that is connected in AND gate 620 output terminals 644; With AND gate 696, has 700, one input ends 704 of input end and an output terminal 708 that is connected in AND gate 620 output terminals 644." with " 648 and 664 the

input end

656 and 672 of standing is connected in microprocessor 430 respectively, receives spark signals with the

output terminal

712 and 716 from microprocessor 430 respectively.In post ignition circuit 500, modulate through multichannel on output terminal 712 from the spark signal corresponding to

cylinder

1 and 4 of microprocessor, promptly compound, and modulate through multichannel on output terminal 716 corresponding to the spark signal of cylinder 2 and 5.AND gate 680 and 696 input end 698 and 704 are connected in microprocessor 430 respectively, receive spark signals with the

output terminal

720 and 724 from microprocessor 430 respectively.The spark signal that output terminal 720 produces corresponding to cylinder 3, and the spark signal that output terminal 724 produces corresponding to cylinder 6.AND gate 680 and 696

output terminal

692 and 708 provide ignition control signal to the spark coil of

cylinder

3 and 6 respectively.In other words,

cylinder

3 and 6 ignition control signal can be produced by the mode of microprocessor 430 with the multichannel modulation, and are combined with each other at 644 places and compound timing output signal, and make multi-channel demodulator by the circuit that is similar to demultiplexer (DMUX 728).AND

gate

648 and 664

output terminal

660 and 676 provide multichannel modulation ignition control signal separately to the spark coil of

cylinder

1 and 4 and 2 and 5 respectively.

Post ignition control circuit 500 also comprises a demultiplexer 728.This DMUX729 comprises AND gate 732 and 736 and AND gate 740,744,748 and 752.DMUX 728, as input, receive the

output

660 and 676 of AND

gate

648 and 664 respectively, and the control that receives microprocessor 430

exports

756 and 760, with the multichannel modulation ignition control signal of multi-channel demodulator corresponding to

cylinder

1 and 4 and 2 and 5, these ignition control signals produce on

output terminal

660 and 676 respectively.DMUX is respectively at output terminal 764,768, produces corresponding to

cylinder

1,42 and 5 multi-channel demodulator ignition control signal on 772 and 776.

On-stream, at low speed, promptly when 200 to 2000 rev/mins of speeds of crankshaft, adopt to postpone a some line circuit 500, and shown that when rotating speed was low to moderate 200 rev/mins, it was good especially to turn round.When rotating speed is higher than 2000 rev/mins, preferably adopt common timing system to come control ignition based on crank angle.Microprocessor provides an injection signal at 564 pairs of cylinders 1 of input end of OR-gate 540.568 pairs of cylinders 4 of input end in OR-gate 540 provide an injection signal.Like this, corresponding to the injection signal of cylinder 1 and 4 at the output terminal 552 of OR-gate 540 by compound.Equally, corresponding to the injection signal of cylinder 2 and 5 at the output terminal 556 of OR-gate 544 by compound, and corresponding to the injection signal of cylinder 3 and 6 at the output terminal of OR-gate 548 by compound.These injection signals are input to timer trigger input end 512,516 and 520 respectively.According to the multichannel modulation timing data that receives through data input pin 508 from microprocessor, at the compound timing signal of output terminal 528 generations corresponding to cylinder 1 and 4, at the compound timing signal of output terminal 532 generations, at the compound timing signal of output terminal 536 generations corresponding to cylinder 3 and 6 corresponding to cylinder 2 and 5.These compound timing signals are followed corresponding to the compound spark control letter of cylinder 1 and 4 and 2 and 5 compound respectively, to produce a pair of compound fire signal corresponding to cylinder 1 and 4 and 2 and 5.These compound fire signals of DMUX728 multi-channel demodulator are to produce a kind of fire signal based on absolute time corresponding to cylinder 1,4,2 and 5.

This microprocessor is also respectively in microprocessor output terminal 720 and the 724 independent spark control signals that produce corresponding to cylinder 3 and 6.These spark control signals are imported into AND gate 680 and 696, to produce the fire signal based on absolute time corresponding to

cylinder

3 and 6 respectively on

output terminal

692 and 708.

Though the foregoing description only changes between time-based igniting and the igniting based on the crank angle according to engine speed, then, can adopt one or more in various other the engine parameters, can be independent, also can be in conjunction with determining when in time-based igniting and conversion between based on the igniting of crank angle.The example of other proper engine parameter comprises engine load, throttle valve position, or some other suitable parameter.Circuit 500 also can adopt together with ignition system 62, with a kind of many sparks of using for internal-combustion engine are provided, based on the firing circuit of absolute time.For example, the output terminal 692,708,764,768,772 and 776 of circuit connectable 500 is with the

output

90,94,98,102,106 and 110 of control ignition system 62 respectively.

Figure 11-15 has represented discharge time with form, firing time, absolute maximum point fire coil regularly, preferential spark coil regularly, corresponding to the firing pulse time with the controlling schemes of the firing circuit 500 of ignition system 62 couplings.Shown in Figure 11-15, when the low percentaeg of full trrottle degree (be approximately the full trrottle degree 15% or be lower than 15%), motor comes work with time-based igniting, and when the high percent of full trrottle degree, (approximately greater than full trrottle degree 15%) comes work with the igniting based on the crank angle.In other words, the throttle valve position that only records from time-based change of lighting a fire based on the igniting of crank angle according to percentaeg by the full trrottle degree.

At the injection timing shown in Figure 11 is to measure with the number of degrees of budc.When firing circuit 500 turned round by time-based mode, promptly throttle valve position was 150 or 150 when following, and on behalf of electric current, the injection timing number in the chart 11 begin to flow into the number of degrees of the budc of fuel injector coil.When firing circuit 500 turned round by the mode based on the crank angle, promptly throttle valve position was greater than 150 o'clock, and on behalf of fuel, the injection timing number in the chart 11 begin to spray into the number of degrees of the budc of firing chamber.

Figure 16 diagrammatizes corresponding to another of firing circuit 500 and replaces controlling schemes in time-based igniting with based on the change between the igniting of crank angle.As shown in figure 16, when low percentaeg throttle valve position, and when the slow-speed of revolution, motor is with time-based ignition operation, and during when the high percent throttle valve position or at high rotating speed, with the ignition operation based on the crank angle.As shown in figure 16, if engine speed is lower than 1000 rev/mins, and the driver the throttle valve desired value less than 20% (being that the throttle valve position detector detects a throttle valve position of 20% less than maximum opening-be represented as " 200 T.P.S " in Figure 16), then igniting is based on the time.If motor is higher than 1000 rev/mins or driver's throttle valve desired value greater than 20% throttle valve opening position, then igniting is based on the crank angle, and as mentioned above, this is controlled by ECU.Have found that, this from time-based igniting carry out the transition to igniting " dual countermeasure " based on the crank angle in the gamut of engine speed for string outside machine good running quality is provided, and in the gamut of throttle valve position, provide good accelerating performance.The serial number of application was No.60/020 on June 21st, 1996, and 033 denomination of invention discloses this preferential ignition system in the U.S. Patent application of " many sparks of motor electric capacity charge ignition system ", was incorporated in this by reference.

In an embodiment of the inventive method, liquid fuel comprises and is less than about 1% lubricant oil.

Two-stroke disclosed herein, spark-ignition internal combustion engine 10 (comprises that part limits the cylinder 7 of firing chamber 54, piston 42 moves between upper and lower dead-centre position therein, and comprise the petrolift and the nozzle assembly 60 of the combination of single solenoid operation, it links to each other with each cylinder 7, and be communicated with the firing chamber 54 that is suitable for) can turn round, in the embodiment of a method, comprise the steps: and not supply with firing chamber 54 basically, supply with piston-advance to the incident pressurization of top dead center position with the air of fuel mix; With basically not with the petrolift and the nozzle assembly 60 of the low pressure liquid fuel supply of air mixing combination, when low engine speed, the petrolift of operative combination and nozzle assembly 60, to directly not import firing chamber 54 to be significantly higher than this low fuel pressure and to be higher than basically because of piston reaches the air pressure that air pressurized that top dead center follows produces in the firing chamber with the liquid fuel of air mixing, therefore in the firing chamber, obtain a kind of stratified charge of finer atomization, during time of engine low speed, spark energy level with regulation, before top dead center position separately first regularly, the petrolift of operative combination and nozzle assembly, fire fuel, when high engine speeds, to directly not import the firing chamber to be significantly higher than this low fuel pressure and to be higher than the air pressure that reaches the generation of air pressurized in firing chamber 54 that top dead center follows because of piston basically with the fuel of air mixing, thereby in the firing chamber, obtain uniform charge, between the high engine speeds on-stream period, to be lower than the spark energy level of regulation, before top dead center position, be separated by fixed second the time, fire fuel, second regularly with the interval of top dead center position greater than first regularly with the interval of top dead center position.

The spark energy level increase of being adopted in said method or that strengthen is meant the spark potential energy of one or more increases, the occurrence rate of the discrete spark of the spark perdurabgility of increase and every cylinder of increase.Best, corresponding to the high engine speeds running, adopt every light-off period that two sparks are arranged, and, adopt every light-off period that 10 to 15 sparks are arranged corresponding to time of engine low speed.

According to another embodiment of the inventive method, comprise the steps: to supply with piston-advance to the incident pressurization of top dead center position with not supplying with the firing chamber basically with the air of fuel mix; The petrolift and the nozzle assembly of combination will do not supplied with the low-pressure fuel of air mixing basically, when low engine speed, the petrolift of operative combination and nozzle assembly, to directly not import the firing chamber to be significantly higher than low fuel pressure and to be higher than basically because of piston reaches the air pressure that air pressurized that top dead center follows produces in the firing chamber with the liquid fuel of air mixing, therefore, in the firing chamber, obtain a kind of stratified charge of finer atomization, during time of engine low speed, spark energy level with regulation, timing with the time lag after spraying based on fuel, the petrolift of operative combination and nozzle assembly, fire fuel; When high engine speeds, to directly not import the firing chamber roughly to be higher than this low fuel pressure and to be higher than basically because of piston reaches the air pressure that air pressurized that top dead center follows produces in the firing chamber with the fuel of air mixing, thereby in the firing chamber, obtain uniform charge, between the high engine speeds on-stream period, to be lower than the spark energy level of regulation, with the timing based on the crank angle, fire fuel.

Another embodiment according to the inventive method, comprise the steps: and not supply with the firing chamber basically with the air of fuel mix, arrive the incident pressurization of top dead center position for piston-advance, with basically not with the petrolift and the nozzle assembly of the low pressure liquid fuel supply of air mixing combination, when throttle valve is set in about 15% aperture or when following, the petrolift of operative combination and nozzle assembly, to directly not import the firing chamber to be significantly higher than this low fuel pressure and to be higher than basically because of piston reaches the air pressure that air pressurized that top dead center follows produces in the firing chamber with the fuel of air mixing, therefore in the firing chamber, obtain a kind of stratified charge of finer atomization, when engine throttle is set in about 15% aperture or when following, spark energy level with regulation, with timing based on the time lag behind the combustion jet, fire fuel, when engine throttle is set in greater than about 15% aperture, the petrolift of operative combination and nozzle assembly, to directly not import the firing chamber to be higher than this low fuel pressure and to be higher than basically because of piston reaches the air pressure that air pressurized that top dead center follows produces in the firing chamber with the fuel of air mixing, thereby in the firing chamber, obtain uniform charge, when engine throttle is set in roughly greater than 15% aperture, to be lower than the spark energy level of regulation, by the timing based on the crank angle, fire fuel.

According to another embodiment of the inventive method, comprise the steps: with basically not with the air fueling chamber of fuel mix, for piston-advance to the incident pressurization of top dead center position; With basically not with the petrolift and the nozzle assembly of the low pressure liquid fuel supply of air mixing combination, be set in about 15% aperture or when following at engine throttle, the petrolift of operative combination and nozzle assembly, with basically not with being significantly higher than this low fuel pressure and being higher than and directly import the firing chamber of air mixing because of piston reaches the air pressure that air pressurized that top dead center follows produces in the firing chamber, therefore, in the firing chamber, obtain a kind of stratified charge of finer atomization, when engine throttle is set in about 15% aperture or when above, spark energy level with regulation, to spray the timing in the back time lag based on fuel, fire fuel, when engine throttle is set in greater than about 15 and 100% aperture, the petrolift of operative combination and nozzle assembly, to directly not import the firing chamber roughly to be higher than this low fuel pressure and to be higher than basically because of piston reaches the air pressure that air pressurized that top dead center follows produces in the firing chamber with the fuel of air mixing, thereby in the firing chamber, obtain uniform charge, when engine throttle is set between about 15% to 100% aperture, to be lower than the spark energy level of regulation, with the timing based on the crank angle, fire fuel.

Disclosed in this article internal-combustion engine 10 also can turn round, in the embodiment of a method, comprise the steps: to obtain a two-stroke, spark-ignition internal combustion engine, it comprises a cylinder that limits a firing chamber, the piston that in cylinder, can between upper and lower dead-centre position, move, this motor also comprises the petrolift and the nozzle assembly of single combination with solenoid operation, is communicated with the firing chamber and is controlled by engine throttle; With basically not with the air fueling chamber of fuel mix, for piston-advance to the incident pressurization of top dead center position; With basically not with the pump and the nozzle assembly of the low pressure liquid fuel supply of air mixing combination; Between the big aperture of throttle valve and motor are with the maximum speed on-stream period, the petrolift of operative combination and nozzle assembly, to directly not import the firing chamber to be higher than this low fuel pressure and to be higher than basically because of piston reaches the air pressure that air pressurized that top dead center follows produces in the firing chamber with the fuel of air mixing, from 215 ° of piston arrives top dead center precontracts during 130 °, with with the acutangulate angle of cylinder-bore axis, to directly not import the firing chamber to be higher than this low fuel pressure and to be higher than basically, thereby in whole firing chamber, obtain to have uniformly the fuel droplet charge of large-size because of piston reaches the air pressure that air pressurized that top dead center follows produces in the firing chamber with the fuel of air mixing; In the big aperture situation of throttle valve and under engine peak speed, during about 7 °, produce 1 to 3 spark, fire fuel from 28 ° of piston arrives top dead center precontracts; In throttle valve 5%-50% aperture situation and in engine speed is under about 200 rev/mins, from 21 ° of piston arrives top dead center precontracts during about 14 °, the petrolift of operative combination and nozzle assembly, with with the acutangulate angle of cylinder-bore axis, to directly not import the firing chamber to be higher than this low fuel pressure and to be higher than basically because of piston reaches the air pressure that air pressurized that top dead center follows produces in the firing chamber with the fuel of air mixing, thereby obtain the fuel droplet stratified charge of finer atomization near top of combustion chamber, its size is less than the large scale fuel droplet of even charge; In 15% throttle valve opening situation and in engine speed is under about 200 rev/mins, during about 51.9 °, produces 10 to 15 sparks, fire fuel 56.4 ° of piston arrives top dead center precontracts.

Should be pointed out that at throttle valve position fuel charge is usually by layering during less than about 15% aperture, and the time greater than about 15% aperture, the fuel charge layering begins to reduce and more even, and at some throttle valve position greater than 15% aperture, fuel charge becomes evenly fully.

Be also pointed out that at throttle valve position during that in the time lag of determining after igniting occurs in fuel and begins to spray, and at throttle valve position during greater than about 15% aperture, ignition timing is based on the crank angle less than about 15% aperture.Also can adopt other specific throttle valve opening.

Though content disclosed herein, part relates to firing time based on throttle valve opening, however firing time also can be only combining based on rotating speed or throttle valve opening and rotating speed.

In addition, though content part disclosed herein relates to based on the spark intensity of throttle valve opening or spark energy level, be with low speed promptly or run up based on motor, however spark intensity or spark energy level also can be only combining based on rotating speed or throttle valve opening and rotating speed.(will point out that also throttle valve opening and rotating speed can directly record according to engine running, yet load can not directly being determined) according to independent in rotating speed and the throttle valve opening.

Will point out that also fuel is to spray by the air pressure that above-mentioned the whole bag of tricks overcomes in the fuel chambers, and this air pressure is along with piston increases gradually near top dead center position.

Though the foregoing description only according to engine speed in time-based igniting with conversion between based on the igniting of crank angle, yet, can adopt one or more individual parameter and its combination in other multiple parameter of motor, to determine when in time-based igniting with based on the conversion between the igniting of crank angle.The example of the parameter that other of motor is suitable comprises engine load, other suitable parameter of throttle valve position or some.

All methods that add functional element in following claims or relative configurations, material, effect and the equivalent of step be intended to comprise with concrete application protection other any structure that combines, material or in order to finish the effect of this function.

Claims

1. method of operating two-stroke, spark-ignition internal combustion engine, this internal-combustion engine comprise a cylinder that limits a firing chamber; The piston that in cylinder, can between upper and lower dead-centre position, move; Single petrolift and the nozzle assembly of using the combination of solenoid operation is communicated with the firing chamber; Described method comprises the steps:

To not supply with the firing chamber basically, arrive the incident pressurization of top dead center position for piston-advance with the air of fuel mix;

With basically not with the petrolift and the nozzle assembly of the low pressure liquid fuel supply of air mixing combination;

During time of engine low speed, the petrolift of operative combination and nozzle assembly, to directly not import the firing chamber with the pressure that is higher than this low fuel pressure and is higher than air pressure pressurized in the fuel chambers basically, thereby in the firing chamber, obtain a kind of stratified charge of finer atomization with the fuel of air mixing;

During time of engine low speed, with the spark energy level of regulation, before top dead center position separately first regularly put comburant (-rent);

Between the high engine speeds on-stream period, the petrolift of operative combination and nozzle assembly, to directly not import the firing chamber with the pressure that is higher than this low fuel pressure and is higher than air pressure pressurized in the fuel chambers basically with the fuel of air mixing, thereby be input in the pressurized air, thereby in the firing chamber, obtain a kind of uniform charge;

Between the high engine speeds on-stream period, with the spark energy level of the spark energy level that is lower than this regulation, and before top dead center position separately second fire fuel regularly, second regularly with the interval of top dead center position greater than first regularly with the interval of top dead center position.

2. method of operating two-stroke, spark-ignition internal combustion engine, this motor comprises a cylinder that limits a firing chamber, the piston that in cylinder, can between upper and lower dead-centre position, move, single petrolift and the nozzle assembly of using the combination of solenoid operation, be communicated with the firing chamber, described method comprises the steps:

During time of engine low speed, the petrolift of operative combination and nozzle assembly, to directly not import the firing chamber with the pressure that is higher than this low fuel pressure and is higher than air pressure pressurized in the firing chamber basically, thereby in the firing chamber, obtain a kind of stratified charge of finer atomization with the fuel of air mixing;

During time of engine low speed, with the spark energy level of regulation and with timing fire fuel based on the time lag after the fuel injection;

Between the high engine speeds on-stream period, the petrolift of operative combination and nozzle assembly, to directly not spray the firing chamber with the pressure that is higher than this low fuel pressure and is higher than air pressure pressurized in the firing chamber basically, thereby in the firing chamber, obtain uniform charge with the fuel of air mixing;

Between the high engine speeds on-stream period, with the energy level of the spark energy level that is lower than this regulation, and with the timing fire fuel based on the crank angle.

3. method of operating two-stroke, spark-ignition internal combustion engine, this internal-combustion engine comprise a cylinder that limits a firing chamber, the piston that can move between upper and lower dead-centre position in cylinder; Single petrolift and the nozzle assembly of using the combination of solenoid operation is communicated with the firing chamber and by engine throttle control, described method comprises the steps:

When engine throttle is adjusted in about 15% aperture or when following, the petrolift of operative combination and nozzle assembly, to directly not import the firing chamber with the pressure that is higher than this low fuel pressure and is higher than air pressure pressurized in the firing chamber basically, thereby in the firing chamber, obtain a kind of stratified charge of finer atomization with the fuel of air mixing;

When engine throttle is adjusted in about 15% aperture or when following, with the spark energy level of regulation and with the timing fire fuel in the time lag after spraying based on fuel;

When engine throttle is adjusted in greater than about 15% aperture, the petrolift of operative combination and nozzle assembly, to directly not import the firing chamber with the pressure that is higher than this low fuel pressure and is higher than air pressure pressurized in the firing chamber basically, thereby in the firing chamber, obtain even charge with the fuel of air mixing;

When engine throttle is adjusted in greater than about 15% aperture, being lower than the energy level of this predetermined energy level, and with the timing fire fuel based on the crank angle.

4. method of operating two-stroke, spark-ignition internal combustion engine, this internal-combustion engine comprise a cylinder that limits a firing chamber, the piston that can move between upper and lower dead-centre position in cylinder; Single petrolift and the nozzle assembly of using the combination of solenoid operation is communicated with the firing chamber and by engine throttle control, described method comprises the steps:

When engine throttle is adjusted in greater than about 15% and 100% aperture, the petrolift of operative combination and nozzle assembly, with basically not with the fuel of air mixing to be higher than this low fuel pressure, and the pressure that is higher than air pressure pressurized in the firing chamber is directly imported the firing chamber, thereby import in the pressurized air, thereby in the firing chamber, obtain uniform charge;

When engine throttle is adjusted between about 15% to 100% aperture, being lower than the energy level of this predetermined energy level, and with the timing fire fuel based on the crank angle.

5. an operation of internal combustion engine method comprises the steps:

Obtain a two-stroke, spark-ignition internal combustion engine, it comprises a cylinder that limits the firing chamber, the piston that in cylinder, can between upper and lower dead-centre position, move, this motor also comprises the combustion pump and the nozzle assembly of single combination by solenoid operation, is communicated with the firing chamber and by engine throttle;

Between the big aperture of throttle valve and motor are with the maximum speed on-stream period, the petrolift of operative combination and nozzle assembly, with basically not with the fuel of air mixing to be higher than this low fuel pressure and to be higher than air pressure in the firing chamber, directly importing the firing chamber, thereby in whole firing chamber, obtain to have uniformly the fuel droplet charge of large-size with the acutangulate angle of cylinder-bore axis;

Under the big aperture situation of throttle valve and under engine peak speed, during about 7 °, produce 1 to 3 spark, fire fuel from 28 ° of piston arrives top dead center precontracts;

Under throttle valve 5%-50% aperture shape and when engine speed is about 200 rev/mins, the petrolift of operative combination and nozzle assembly, with with the acutangulate angle of cylinder-bore axis, to directly not import the firing chamber to be higher than this low fuel pressure and to be higher than basically because of piston reaches the air pressure that air pressurized that top dead center follows produces in the firing chamber with the fuel of air mixing, thereby obtain the fuel droplet stratified charge of finer atomization near top of combustion chamber, its size is less than the large scale fuel droplet of even charge;

Under the 5-50% throttle valve opening situation and when engine speed is about 200 rev/mins, produce 10 to 15 sparks, fire fuel.