CN2282603Y - Electro-single firing fuel oil jetting and direct firing petrol engine for vehicle - Google Patents

Abstract

The utility model relates to an electronic control single-point fuel jet and direct igniting gasoline engine for vehicles, which belongs to the category of internal combustion engines. The utility model is in a reciprocating piston type, has four straight arrayed cylinders and four strokes and is cooled by water, an air valve is arranged at the top of the utility model, the sizes of the strokes are 92 mm, and the diameters of the cylinders are 92 mm. The utility model is characterized in that a fuel supply system and an igniting system of the gasoline engine are electronic controlled single-point fuel jet and direct igniting systems. The utility model has the advantages of simple and reliable structure, easy operation, better cost performance, low cost and little pollution. The utility model is suitable for the power requirements of various modern light passenger cars and wagons.

Description

A kind of electronic throttle body injection and direct ignition vehicle gasoline engine

The utility model belongs to the internal-combustion engine category, relates to a kind of electronic control single-point injection and direct ignition vehicle gasoline engine.

As the sign of weighing Hyundai Motor engine performance technical merit, electric-controlled injection and direct ignition technology are used widely in the engine product of industrially developed country, and are improving raising day by day.Along with the formulation of Abgasgesetz and the improving constantly of automobile power Economy requirement of domestic increasingly stringent, mechanical type Carburetor fuel feeding and the distributor ignition of still generally adopting now obviously can't meet the demands.

The purpose of this utility model is exactly to adopt a kind of electronic control single-point injection and direct ignition system on a large amount of home-produced fuel machines that use now.Make motor under any circumstance, all can be under the optimum Working and move, make its performance best performance level, can satisfy the exhaust emission regulations requirement, can improve dynamic economics again, and have good price performance.

The purpose of this utility model is achieved through the following technical solutions.In north on the basis of group's existing BN492QB type petrol engine, improve the design of traditional fuel delivery and ignition system, adopt electronically controlled throttle body gasoline injection system and direct fire unit, this automatical control system can accurately be controlled parameters such as air fuel ratio and time of ignition, to guarantee that motor under any circumstance all can be in optimal operational condition, thereby given play to best performance level, the project organization characteristics are: oil supply system (contains oil sprayer by throttle body assembly, the fuel oil pressure governor, the idling air valve, throttle position sensor etc.), be loaded on electric fuel punp in the fuel tank, fuel filter, advance, return line is formed, and cancels former mechanical type Carburetor and improves the design of intake manifold suction port, and throttle body assembly is installed, make it be applicable to gasoline injection and each cylinder mixed gas distributed uniform, reduce intake resistance and improve charging efficiency.Cancel former mechanical gasoline pump simultaneously and on its mounting point, adorn baffle plate.Ignition system is by two secondary output point fire coils and ignition module assembly, high voltage damper and spark plug are formed, the spark plug gap is done suitably to adjust, the cancellation distributor, the place adds door at the distributor mounting interface, control system is by control unit of engine (ECU), various sensors and complete machine wire harness are formed, control unit includes insertable module (EPROM) and is erasable programmable read only memory, be used for storing engine calibration data and software, sensor contains crankshaft position sensor (CPS), manifold absolute pressure sensor (MAP), cooling-water temperature transmitter (CTS), throttle position sensor (TPS), intake air temperature sensor (MAT), speed probe (VSS) and air-conditioning switch, wire harness comprises plug connector, relay, insurance, lead-in wire etc.Crankshaft position sensor is fixed on the flywheel casing exterior edge face, on the flywheel relevant position, open seven holes, uniform the 7th hole, six holes is 1,4 cylinder atdc, 70 degree, the gap is to obtain stable rotating speed and crankshaft-position signal between suitable adjustment sensor and flywheel, cooling-water temperature transmitter is installed at cylinder cap cooling liquid outlet place, on the air-strainer of choosing dress, intake air temperature sensor is installed, this petrol engine automatical control system software is according to condition specific designs such as these machine characteristics and Applicable scope, this petrol engine obtains the formedness the subject of knowledge and the object of knowledge relies that the air fuel ratio A/F and the electronic spark advance angular dimensions of petrol engine is according to specific Economy under each operating mode of foundation, the requirement of power character and discharging is at engine pedestal, a large amount of rating tests under car load and all kinds of specified conditions and the nominal data obtained sets.

Above-mentioned design improvement of the present utility model has been passed through the stand and the service testing of engine performance, the rated power of petrol engine improved 6% before and after contrast improved, fuel consumption rate reduces by 8%, idle exhaust emission index: HC is 60ppm, CO is 0.3%, idle exhaust emission CH, the CO value descends more than 80%, the discharging of dress 2020S car 15 operating modes reaches the ECE15.0470% Valuation Standard, show that dynamic economics improves toxic emission and obviously improves, like this, the environmental pollution problem and simple and reliable being convenient to of improvement project organization that had both solved automobile are implemented, cost is low, both can consolidate the application market widely that 492Q type petrol engine just has originally, can widen new use field simultaneously again, be applicable to the power needs of various modern light passenger-cargo carriage, have favorable social and economic benefits.

The utility model is described in further detail below in conjunction with accompanying drawing:

Fig. 1 is the automatical control system functional schematic of the utility model electronic throttle body injection and direct ignition vehicle gasoline engine.

Fig. 2 is preceding petrol engine structural representation for Fig. 1 embodiment improves, in automatical control system functional schematic shown in Figure 1, express fuel oil supply system by the throttle body injection assembly TBI2 that is installed on the intake manifold, the electric fuel punp (7) that comprises oil sprayer (2A), throttle position sensor (2B), idling air valve (2C) and fuel filter and be installed in the fuel tank constitutes, and has cancelled former mechanical gasoline pump simultaneously and adorn plate washer on its mounting point.Direct ignition system DIS (4) is made of ignition module (4A), two secondary output Coilpacks (4B), high voltage damper and spark plug (4C), cancels former distributor (18), and the place adds door at the distributor mounting interface.Electronic control system is by engine electronic control unit (ECU) (1), comprise insertable module (EPROM) (1A) and the throttle position sensor that is attached thereto (TPS) (2B), cooling-water temperature transmitter (CTS) (11), intake air temperature sensor (MAT) (13), manifold absolute pressure sensor (MAP) (12), crankshaft position sensor (CPS) (5), vehicle speed sensor (VSS) (10) and relay (8), storage battery (9), ignition switch, test plug, compositions such as linear speed, crankshaft position sensor (5) is fixed on the flywheel casing exterior edge face, upward open seven holes at flywheel (6) by certain position degree, when engine rotation, crankshaft position sensor (5), the engine speed and the position signal that record are delivered to ignition module (4A), signal is converted into pulse square wave and delivers to electronic control unit (ECU) (1), the treated optimum igniting moment that draws under this operating mode, by ignition module (4A) spark coil (4B) primary current and closing time are controlled again, make spark plug (4C) correct timed ignition, engine operation is in the optimum state.Electronic control system is analyzed by the signal that various sensor is gathered, the control fuel injection pulsewidth reaches accurate air fuel ratio of petrol engine and ignition advance angle, makes motor be in optimum condition, obviously reduces toxic emission and improves power, reduce the fuel oil consumption, improve dynamic economics.Fault diagnosis lamp (3) has self diagnosis and safety guarantee function, also has the control switch of air conditioner (14) in the system.In Fig. 2, for present embodiment improves preceding petrol engine structural representation, after the intake manifold (16) of BN492QB type petrol engine (15) goes up former mechanical type Carburetor (17) cancellation, throttle body injection assembly (2) has been installed, add door in former distributor (18) cancellation back at its mounting interface place, by direct ignition system DIS (4) control ignition, as described above.

Embodiment's project organization of the present utility model is simple and reliable easy to implement, has good price performance, and following table is for improving front and back, the comparison of engine design parameters and performance index.

Project	BN492QB (petrol engine before improving)	BN492D1QB (the utility model is implemented the back)
			Pattern	In-line four cylinder, four-stroke, water-cooled	Water-cooled four cycle in upright arrangement
Bore/stroke (mm * mm)	92×92	92×92
			Discharge capacity (L)	2.445	2.445
Compression ratio	7.5∶1	7.5∶1
			Oil supply system	Twin barrel carburetor, mechanical fuel pump	Throttle body injection, electric fuel punp
Ignition system	Breakerless distributor	Direct ignition system
			Rated power kw	62.5	66.2
Maximum Torque N.m	179	189
			Power per liter kw/L	25.56	27.08
Torque per liter N.m/L	73.21	77.3
			Fuel consumption rate g/kw.h	299	268
Idle exhaust emission HC CO	＜600ppm ＜3％	60ppm 0.3％

Claims (4)

1, a kind of electronic control single-point injection and direct ignition vehicle gasoline engine, for reciprocating piston type, in-line four cylinder, four-stroke, water-cooled, Overhead valve, cylinder diameter * stroke are the petrol engine of 92 * 92mm, be characterised in that: the fuel supply system of this petrol engine ignition system of unifying is electronically controlled single-point injection and direct ignition system.

2, according to the described petrol engine of claim 1, it is characterized in that: in former mechanical type Carburetor (17) fuel oil supply system, be designed to fuel injection apparatus, by the throttle body injection assembly (2) that is installed on the intake manifold, comprise oil sprayer (2A), throttle position sensor (2B) and idling air valve (2C), fuel filter and the electric fuel punp (7) that is installed in the fuel tank constitute, and adorn baffle plate simultaneously on former mechanical gasoline pump mounting point.

3, petrol engine according to claim 1 is characterized in that: described direct ignition system (4) is by ignition module (4A) and two secondary output Coilpack (4B), and high voltage damper and spark plug (4C) constitute, cancel former distributor (18), the place adds door at the distributor mounting interface.

4, petrol engine according to claim 1, it is characterized in that: the throttle position sensor (2B) that electronic control system is contained insertable module (1A) and is attached thereto by engine electronic control unit (1), cooling-water temperature transmitter (11), intake air temperature sensor (13), manifold absolute pressure sensor (12), crankshaft position sensor (5), vehicle speed sensor (10) and relay (8) storage battery (9), ignition switch, detecting head, compositions such as wire harness are mounted on crankshaft position sensor (5) on the flywheel casing place end face, go up at flywheel (6) and open seven holes by certain position angle.

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