GB2122252A - Stroboscopic engine fuel-injection timing - Google Patents
Stroboscopic engine fuel-injection timing Download PDFInfo
- Publication number
- GB2122252A GB2122252A GB8217928A GB8217928A GB2122252A GB 2122252 A GB2122252 A GB 2122252A GB 8217928 A GB8217928 A GB 8217928A GB 8217928 A GB8217928 A GB 8217928A GB 2122252 A GB2122252 A GB 2122252A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fuel
- pulses
- transducer
- series
- engine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
- F02D2041/1413—Controller structures or design
- F02D2041/1432—Controller structures or design the system including a filter, e.g. a low pass or high pass filter
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/025—Engine noise, e.g. determined by using an acoustic sensor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0614—Actual fuel mass or fuel injection amount
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Fuel injection is detected from pulses of sound at or near 40 KHz from the region of the fuel injection and a first series of pulses representing the instants of fuel injection is produced. A second series of pulses is derived from the first series and used to control a strobe lamp flashing on a rotating timing marker of the engine. The timing of the second series of pulses is adjusted until the strobe lamp flashes at the instants that the timing marker passes a stationary reference marker. The timing relationship between the first and second series of pulses then indicates the timing of the fuel injection. A microphone (11 or 51, Fig. 2 or 3) is clamped to the fuel injector or its fuel pipe or aimed at the injector to detect the ultrasonic pulses.
Description
1
GB 2 122 252 A 1
SPECIFICATION
Stroboscopic engine fuel-injection timing
This invention relates to a method of and apparatus for determining the timing of fuel-5 injection by a fuel-injector of a fuel-injected internal combustion engine provided with a timing marker on a rotating fly wheel or other rotating part of the engine by means of a strobe lamp, that is to say, a lamp which is adapted to 10 produce repeated flashes of light at precisely timed instants, hereinafter referred to as "stroboscopic engine fuel-injection timing".
A fuel-injected internal combustion engine is commonly provided with a timing marker on a 1 5 rotating flywheel of the engine and with a stationary reference marker positioned closely adjacent the rotational path of the timing marker, so that the timing marker passes the reference marker at some specific instant during the engine 20 cycle, for example, the so-called "top-dead-
centre" ("TDC") position—when the piston or one of the pistons of the engine is at the "highest" position, that is, the position of maximum compression—or for example a fuel-injection 25 position, being a position of the piston where it is desired for fuel-injection to occur at some specified speed of the engine, somewhat in advance of the TDC position, that is to say, before the piston reaches the TDC position. The 30 relationship of the fuel-injection position to the TDC position is often expressed in terms of the angle, in degrees, through which the crankshaft rotates from the fuel-injection position to the TDC position.
35 It is known to use a strobe lamp for timing ignition of a spark-ignited (that is, electrical spark-ignited) internal combustion engine, obtaining a signal for the strobe lamp from a spark plug lead of the engine. Such a signal is of no use for timing 40 fuel injection, nor is such a signal even available in a compression-ignition fuel-injected internal combustion engine, that is, a diesel engine.
It is known, or has been proposed, to detect lift of a needle of a fuel-injector of an internal 45 combustion engine, by having the needle specially adapted to operate an electrical sensor upon being lifted, but a disadvantage of this is the requirement for the needle to be specially adapted.
50 It is also known, or has been proposed, to detect lift of a needle of a fuel-injector of an internal combustion engine, by using an acousto-electrical transducer or microphone to listen for an impact of the needle against a stop limiting the 55 lift of the needle. However, a disadvantage is that the needle does not always impact against the stop, and the noise of the impact (if it occurs) is difficult to distinguish from other noises of the engine.
60 Furthermore, both above-mentioned ways of detecting lift of a needle provide no way of checking that the lift of the needle results in the actual injection of fuel.
It is also known, or has been proposed, to 65 detect fuel-injection of an internal combustion engine by using a piezo-electric transducer to detect minute expansions and contractions of a fuel-line of the fuel injector of the engine due to pressure pulsations in the fuel in the fuel-line. 70 However, there may be considerable error, due to the differences in timing between the pressure pulsations and the actual injection of fuel.
The present invention is based upon a discovery that an acousto-electric transducer, 75 external to the engine, in combination with an electrical amplifier circuit, may be reliably used to detect actual injection of fuel into a fuel-injected internal combustion engine, provided that the transducer is arranged to detect ultrasonic 80 frequency sound waves emanating from the region of the injection of the fuel into the engine, even though the transducer is external to the engine, and provided that the combination of the transducer and the amplifier circuit is tuned to a 85 particular ultrasonic frequency which is substantially the same frequency regardless of the engine.
According to one aspect of the present invention there is provided a method of 90 determining the timing of fuel-injection by a fuel-injector of a fuel-injected internal combustion engine provided with a timing marker on a rotating part of the engine, comprising:— detecting the instants of fuel-injection; producing 95 a first series of electrical pulses representing said instants of fuei-injection; deriving a second series of electrical pulses from said first series of pulses; controlling a strobe lamp by means of said second series of pulses; illuminating the said rotating part 100 of the engine by means of the strobe lamp; adjusting the timing of said second series of pulses relative to said first series of pulses as necessary, so that each flash of the lamp occurs as the timing marker passes a reference position; 105 and determining the timing relationship between said first and second series of pulses; characterised in that the detection of the instants of fuel injection is achieved by applying an acousto-electric transducer in combination with 110 an electrical amplifier circuit to the engine, externally thereof, and detecting ultrasonic frequency sound waves emanating from the region of the injection of the fuel into the engine; the combination of the transducer and the 11 5 electrical amplifier circuit being turned to an ultrasonic frequency at or near to forty kilohertz.
According to another aspect of the present invention there is provided apparatus for determining the timing of fuel-injection by a fuel-120 injector of a fuel-injected internal combustion engine provided with a timing marker on a rotating part of the engine, the apparatus comprising a strobe lamp for illumination of the said rotating part of the engine, and means:— for 125 detecting the instants of fuel injection; for producing a first series of electrical pulses representing said instants of fuel injection; for deriving a second series of electrical pulses from
2
GB 2 122 252 A 2
said first series of pulses; for controlling the strobe lamp by means of said second series of pulses; for adjusting the timing of said second series of pulses relative to said first series of 5 pulses as necessary, so that each flash of the lamp can be made to occur as the timing marker passes a reference position; and for determining the timing relationship between said first and second series of pulses; characterised in that the 1 o means for detection of the instants of fuel injection comprises an acoustic-electric transducer in combination with an electrical amplifier circuit, adapted to be applied to the engine externally thereof for detection of 15 ultrasonic frequency sound waves emanating from the region of the injection of the fuel into the engine; the combination of the transducer and the electrical amplifier circuit being tuned to an ultrasonic frequency at or near to forty kilohertz. 20 The above two statements about "the combination of the transducer and the electrical amplifier circuit being tuned to an ultrasonic frequency at or near to forty kilohertz" are meant to be broadly construed as to just how the 25 aforesaid combination is "tuned", in the sense that it is the presence of, or a substantial increase in, sound at an ultrasonic frequency at or near to forty kilohertz (40 KHz) that signals the injection of the fuel, so that the aforesaid combination of 30 transducer and amplifier circuit is required to process signals preferentially at this frequency.
The invention will be described by way of example with reference to the accompanying drawings, wherein:—
35 Fig. 1 is a block schematic diagram of preferred apparatus embodying the invention;
Fig. 2 illustrates one possible form of the ultrasonic (frequency) microphone of Fig. 1;
Fig. 3 illustrates another possible form of the 40 microphone of Fig. 1; and
Fig. 4 illustrates a typical oscilloscope trace of the output of the microphone of Fig. 3.
Referring to the drawings and particularly Fig. 1, the preferred apparatus 10 embodying the 45 invention comprises an acousto-electric transducer 11, in the form of an ultrasonic frequency microphone, connected to the input of an amplifier 12, the output of which is connected to a bandpass filter 13 having a centre frequency 50 of approximately forty KHz and a bandwidth of +two KHz, although the centre frequency and the bandwidth need not necessarily be exactly these values. The output of the filter 13 is connected to the input of a second amplifier 14, the output of 55 which is connected to the input of a demodulator 15. An automatic gain control ("AGC") feedback loop 16 is provided from the demodulator 15 to the amplifier 14. One output 17 of the demodulator 15 is provided for connection to an 60 oscilloscope (not shown). A second output from demodulator 15 forms one input to a comparator 18. A second input to comparator 18 is from a manually adjustable tapping 19 of a potentiometer 20, such that the output from 65 comparator 18 switches between two levels according to whether the output from demodulator 15 is below or above the output on tapping 19 of potentiometer 20. The output from comparator 18 is supplied to a pulse-shaping and retrigger-inhibiting circuit 21.
The part of the apparatus 10 thus far described, from transducer 11 to pulse-shaping and retrigger-inhibiting circuit 21, provides a first series of electrical pulses representing instants of fuel-injection. More particularly, the transducer 11 picks up ultrasonic frequency sound signals from the region of the injection of the fuel into the engine, including in particular sound signals having a frequency at or near to 40 KHz, which are amplified by amplifier 12 and supplied to filter 13, which passes substantially only signals having a frequency of 40±2 KHz to the second amplifier 14 and demodulator 15 with the AGC feedback loop 16. So long as no fuel is being injected, the output from demodulator 15 to comparator 18 is low relative to the level at tapping 19 of potentiometer 20, so that comparator 18 delivers an output at a corresponding level to the pulse-shaping and retrigger-inhibiting circuit 21. When fuel is being injected into the engine, producing sound at a frequency at or near to 40 KHz, the output from demodulator 15 rises above the level at tapping 19 of potentiometer 20, so that the output from comparator 18 switches to the other of its two levels for the duration of the fuel injection. Hence, for each pulse delivered by comparator 18 to the pulse-shaping and retrigger-inhibiting circuit 21, the leading and trailing edges of the pulse correspond substantially to commencement and termination of the injection of the fuel. Depending upon the design of the pulse-shaping and retrigger-inhibiting circuit 21, the output pulses therefrom may either be pulses the duration of which corresponds substantially to the duration of the pulses from the comparator 18, or may be fixed duration pulses triggered by the leading edges of the pulses from the comparator 18.
The pulses from pulse-shaping and retrigger-inhibiting circuit 21, being the first series of pulses, are delivered to a circuit 22 which is adapted to derive a second series of pulses therefrom and supply this second series of pulses to a trigger and high tension voltage generator circuit 23 for controlling a strobe lamp 24. The timing relationship between the second series of pulses and the first series of pulses is selectively adjustable by manual adjustment means 25 forming part of circuit 22. By this means, the second series of pulses may either be coincident in time with the first series of pulses or delayed relative to the first series of pulses with an adjustable delay, depending on whether the strobe lamp is to flash at the same time as pulse-shaping and retrigger-inhibiting circuit 21 delivers a pulse or whether the flash of the strobe lamp 24 is to be delayed.
The output from pulse-shaping and retrigger-inhibiting circuit 21 is also supplied to a phase-locked loop circuit 26, which generates clock
70
75
80
85
90
95
100
105
110
115
120
125
130
Claims (14)
1. A method of determining the timing of fuel-injection by a fuel-injeetor of a fuel-injected internal combustion engine provided with a timing marker on a rotating part of the engine, 110 comprising:— detecting the instants of fuel-injection; producing a first series of electrical pulses representing said instants of fuel-injection; deriving a second series of electrical pulses from said first series of pulses; controlling a strobe 11 5 lamp by means of said second series of pulses; illuminating the said rotating part of the engine by means of the strobe lamp; adjusting the timing of said second series of pulses relative to said first series of pulses as necessary, so that each flash of 120 the lamp occurs as the timing marker passes a reference position; and determining the timing relationship between said first and second series of pulses; characterised in that the detection of the instants of fuel injection is achieved by 125 applying an acousto-electric transducer in combination with an electrical amplifier circuit to the engine, externally thereof, and detecting ultrasonic frequency sound waves emanating 'from the region of the injection of the fuel into the
4
GB 2 122 252 A 4
engine; the combination of the transducer and the electrical amplifier circuit being tuned to an ultrasonic frequency at or near to forty kilohertz.
2. A method as claimed in claim 1, in which 5 said transducer is a contact transducer which is placed in contact with the fuel-injector.
3. A method as claimed in claim 2, in which the contact transducer is a contact microphone.
4. A method as claimed in claim 3, in which the 10 contact microphone is of piezo-electric type.
5. A method as claimed in claim 1, in which the transducer is a directional microphone which is directed at the fuel-injector.
6. Apparatus for determining the timing of fuel-15 injection by a fuel-injector of a fuel-injected internal combustion engine provided with a timing marker on a rotating part of the engine, the apparatus comprising a strobe lamp for illumination of the said rotating part of the engine, 20 and means:— for detecting the instants of fuel injection; for producing a first series of electrical pulses representing said instants of fuel injection; for deriving a second series of electrical pulses from said first series of pulses; for controlling the 25 strobe lamp by means of said second series of pulses; for adjusting the timing of said second series of pulses relative to said first series of pulses as necessary, so that each flash of the lamp can be made to occur as the timing marker 30 passes a reference position; and for determining the timing relationship between said first and second series of pulses; characterised in that the means for detection of the instants of fuel injection comprises an acousto-electric 35 transducer in combination with an electrical amplifier circuit, adapted to be applied to the engine externally thereof for detection of ultrasonic frequency sound waves emanating from the region of the injection of the fuel into the 40 engine; the combination of the transducer and the electrical amplifier circuit being tuned to an ultrasonic frequency at or near to forty kilohertz.
7. An apparatus as claimed in claim 6, in which the transducer is a contact transducer. 45
8. An apparatus as claimed in claim 7, in which the contact transducer is a contact microphone.
9. An apparatus as claimed in claim 8, in which the contact microphone is of piezo-electric type.
10. An apparatus as claimed in any one of 50 claims 7 to 9, in which the contact transducer is provided with a spring clip for attachment to the injector.
11. An apparatus as claimed in claim 6, in which the transducer is a directional microphone.
55
12. An apparatus as claimed in any one of claims 6 to 11, in which the electrical amplifier circuit includes a filter arranged to pass a component of the output of the transducer having a frequency at or near to forty kilohertz. 60
13. An apparatus as claimed in claim 12, in which the filter is a bandpass filter having a centre frequency at or near to forty kilohertz.
14. An apparatus as claimed in any one of claims 6 to 13 and comprising means to 65 determine the engine speed from pulse frequency.
Printed for Her Majesty's Stationery Office by the Courier Press, Leamington Spa, 1984. Published by the Patent Office, 25 Southampton Buildings, London, WC2A 1 AY, from which copies may be obtained.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8217928A GB2122252A (en) | 1982-06-21 | 1982-06-21 | Stroboscopic engine fuel-injection timing |
EP82306191A EP0097211A3 (en) | 1982-06-21 | 1982-11-22 | Stroboscopic engine fuel-injection timing |
JP22036582A JPS595874A (en) | 1982-06-21 | 1982-12-17 | Method and device for determining timing of fuel injection |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8217928A GB2122252A (en) | 1982-06-21 | 1982-06-21 | Stroboscopic engine fuel-injection timing |
Publications (1)
Publication Number | Publication Date |
---|---|
GB2122252A true GB2122252A (en) | 1984-01-11 |
Family
ID=10531191
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8217928A Withdrawn GB2122252A (en) | 1982-06-21 | 1982-06-21 | Stroboscopic engine fuel-injection timing |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0097211A3 (en) |
JP (1) | JPS595874A (en) |
GB (1) | GB2122252A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2136051A (en) * | 1983-03-02 | 1984-09-12 | Bosch Gmbh Robert | Test device for injection systems |
US4791810A (en) * | 1986-05-01 | 1988-12-20 | United Kingdom Atomic Energy Authority | Flow monitoring |
DE102004031239A1 (en) * | 2004-06-29 | 2006-01-19 | Daimlerchrysler Ag | Sensor system for a vehicle |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6143033A (en) * | 1984-08-06 | 1986-03-01 | Nec Corp | Data transfer circuit |
JPH0642207Y2 (en) * | 1985-11-22 | 1994-11-02 | 追浜工業株式会社 | Rotation sensor for diesel engine |
WO2009126956A1 (en) * | 2008-04-11 | 2009-10-15 | Expro Meters, Inc. | Clamp-on apparatus for measuring a fluid flow that includes a protective sensor housing |
PL222532B1 (en) * | 2012-04-05 | 2016-08-31 | Akademia Morska W Szczecinie | Method and system for diagnosing the injection system of compression-ignition engines, especially marine engines |
AT517412B1 (en) * | 2015-07-03 | 2018-02-15 | Avl Ditest Gmbh | Portable probe |
CN115324759B (en) * | 2022-10-12 | 2022-12-27 | 南通普盛动力有限公司 | Method for identifying abnormality of oil nozzle of diesel engine |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB811910A (en) * | 1956-04-06 | 1959-04-15 | Hartmann & Braun Ag | Improved apparatus for testing compression ignition internal-combustion engines in the determination of phase relationships between fuel injection and piston position |
US4109517A (en) * | 1975-08-21 | 1978-08-29 | Daimler-Benz Aktiengesellschaft | Method and apparatus for controlling the correct angular adjustment of periodic injection operations |
GB1555018A (en) * | 1975-12-23 | 1979-11-07 | Autoipari Kutato Intezet | Determining the starting point for fuel injection in internal-combustion engines |
GB2035558A (en) * | 1978-11-06 | 1980-06-18 | Deere & Co | Apparatus for sensing pulsations in a pipe |
GB2035560A (en) * | 1978-11-29 | 1980-06-18 | Ckd Praha | Apparatus for detecting and analysing acoustic and ultrasonic signals in hollow bodies |
GB2103366A (en) * | 1981-06-27 | 1983-02-16 | Lucas Ind Plc | Test apparatus for ignition timing |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3580092A (en) * | 1969-12-23 | 1971-05-25 | Scarpa Lab Inc | Acoustic flowmeter |
DE2639133A1 (en) * | 1976-08-31 | 1978-03-09 | Siegfried Brueckl | External monitoring of diesel engine injection function - using piezoelectric transducer on injection line triggering stroboscope or oscilloscope |
-
1982
- 1982-06-21 GB GB8217928A patent/GB2122252A/en not_active Withdrawn
- 1982-11-22 EP EP82306191A patent/EP0097211A3/en not_active Withdrawn
- 1982-12-17 JP JP22036582A patent/JPS595874A/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB811910A (en) * | 1956-04-06 | 1959-04-15 | Hartmann & Braun Ag | Improved apparatus for testing compression ignition internal-combustion engines in the determination of phase relationships between fuel injection and piston position |
US4109517A (en) * | 1975-08-21 | 1978-08-29 | Daimler-Benz Aktiengesellschaft | Method and apparatus for controlling the correct angular adjustment of periodic injection operations |
GB1555018A (en) * | 1975-12-23 | 1979-11-07 | Autoipari Kutato Intezet | Determining the starting point for fuel injection in internal-combustion engines |
GB2035558A (en) * | 1978-11-06 | 1980-06-18 | Deere & Co | Apparatus for sensing pulsations in a pipe |
GB2035560A (en) * | 1978-11-29 | 1980-06-18 | Ckd Praha | Apparatus for detecting and analysing acoustic and ultrasonic signals in hollow bodies |
GB2103366A (en) * | 1981-06-27 | 1983-02-16 | Lucas Ind Plc | Test apparatus for ignition timing |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2136051A (en) * | 1983-03-02 | 1984-09-12 | Bosch Gmbh Robert | Test device for injection systems |
US4791810A (en) * | 1986-05-01 | 1988-12-20 | United Kingdom Atomic Energy Authority | Flow monitoring |
DE102004031239A1 (en) * | 2004-06-29 | 2006-01-19 | Daimlerchrysler Ag | Sensor system for a vehicle |
Also Published As
Publication number | Publication date |
---|---|
JPS595874A (en) | 1984-01-12 |
EP0097211A2 (en) | 1984-01-04 |
EP0097211A3 (en) | 1985-10-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5739417A (en) | Method and device for determining operating parameters in an internal combustion engine | |
US7559230B2 (en) | Method and device for analyzing the combustion noise in a cylinder of an internal combustion engine | |
US4413508A (en) | Adjusting system for crank angle sensor | |
EP1531324A3 (en) | Knocking determination apparatus for internal combustion engine | |
EP0097211A2 (en) | Stroboscopic engine fuel-injection timing | |
ES8204174A1 (en) | Pressure detector for an internal-combustion engine. | |
ES8207274A1 (en) | Device for adjusting engine timing | |
KR890016282A (en) | Adaptive Performance Ratio Control System of Internal Combustion Engine | |
JPS6142209B2 (en) | ||
Ohashi et al. | The application of ionic current detection system for the combustion condition control | |
US5575259A (en) | Controller for four-stroke cycle internal-combustion engine | |
US6604505B2 (en) | Method and apparatus for controlling the ignition point in internal combustion engines | |
JPS6024307B2 (en) | Dynamic injection timing measuring device | |
JPH0577873B2 (en) | ||
JP3627548B2 (en) | Combustion pressure detection device for internal combustion engine | |
SU426383A3 (en) | ||
JPS60138247A (en) | Fuel injection timing control device | |
JPS6338376Y2 (en) | ||
ES8403192A1 (en) | Test apparatus for ignition timing | |
JPS6189977A (en) | Ignition and injection timing measuring method of internal-combustion engine | |
EP0790396A3 (en) | Apparatus for detecting misfires in an electronic controlled diesel engine | |
JPS62282237A (en) | Misfire detector | |
SU1180727A1 (en) | Device for measuring cyclic feed of fuel into internal combustion engine | |
JPS58174153A (en) | Injection timing sensing device of engine | |
JPS6338375Y2 (en) |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |