CN101566118B - Method for improving idle quality by torque smoothing - Google Patents

Method for improving idle quality by torque smoothing Download PDF

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Publication number
CN101566118B
CN101566118B CN2008101497637A CN200810149763A CN101566118B CN 101566118 B CN101566118 B CN 101566118B CN 2008101497637 A CN2008101497637 A CN 2008101497637A CN 200810149763 A CN200810149763 A CN 200810149763A CN 101566118 B CN101566118 B CN 101566118B
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China
Prior art keywords
ignition timing
cylinder
period
reciprocation period
module
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Expired - Fee Related
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CN2008101497637A
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Chinese (zh)
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CN101566118A (en
Inventor
V·勒伊斯
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GM Global Technology Operations LLC
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GM Global Technology Operations LLC
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Priority claimed from US12/107,269 external-priority patent/US7523738B2/en
Application filed by GM Global Technology Operations LLC filed Critical GM Global Technology Operations LLC
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    • 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
    • F02D41/16—Introducing closed-loop corrections for idling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P5/00—Advancing or retarding ignition; Control therefor
    • F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
    • F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
    • F02P5/155—Analogue data processing
    • F02P5/1551—Analogue data processing by determination of elapsed time with reference to a particular point on the motor axle, dependent on specific conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2250/00—Engine control related to specific problems or objectives
    • F02D2250/18—Control of the engine output torque
    • 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
    • F02D41/008—Controlling each cylinder individually
    • F02D41/0085—Balancing of cylinder outputs, e.g. speed, torque or air-fuel ratio
    • 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
    • F02D41/009—Electrical control of supply of combustible mixture or its constituents using means for generating position or synchronisation signals
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Electrical Control Of Ignition Timing (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

The present invention relates to a method for improving idle quality by torque smoothing, in particular, an idle speed control system for an engine is provided, which includes an engine speed module that generates an engine speed signal. A piston reciprocation module determines reciprocation periods of each piston of cylinders of the engine based on the engine speed signal. A difference module determines a period difference between each of the reciprocation periods and an idle period associated with a target idle speed. A spark timing module regulates an idle speed of the engine including adjustment of spark timing for each of the cylinders individually based on period differences.

Description

Improve idle quality through the torque tranquilization
Cross-reference to related applications
The application requires to apply for the rights and interests of No. the 60/936th, 978, the U.S. Provisional Application on June 22nd, 2007.Open this paper that incorporates into as a reference of above-mentioned application.
Technical field
The disclosure relates to engine control, and relates more specifically to the torque output of the race of engine in the cycle.
Background technique
Statement in these chapters and sections only provides the background information relevant with the disclosure, does not constitute existing technology.
The explosive motor of vehicle generates driving torque through the air/fuel mixture burning.More specifically, air is inhaled into motor, with fuel mix.Air/fuel mixture is compressed in the cylinder of motor, and is lighted a fire.The burning of compressed air/fuel mixture reciprocally drives the piston in the cylinder.Piston then drives bent axle rotationally, thereby to transmission system output driving torque.
In some instances, for example when vehicle stopped, motor dallied in idling speed (or claiming idling) or near under the idling speed.The fluctuation of idling speed can cause vibration.Fluctuation is to be caused by the output of the torque between each cylinder of motor difference.The difference of torque output maybe be relevant with many factors, compares like effective compression ratio, air/fuel etc.Torque output difference between the cylinder often becomes serious with the aging further of motor.
A kind of method of controlling the no-load speed of motor comprises that adjusting air and/or fuel stream are to keep selected idling speed.This is limited to the control of keeping idling speed, and to preventing that the fluctuation that torque is exported from also being limited.
Summary of the invention
In one embodiment, a kind of idling speed control system that is used for motor is provided, this system comprises the engine speed module that generates engine speed signal.The reciprocating motion of the pistons module is confirmed the reciprocation period of each piston of engine cylinder based on engine speed signal.Difference block confirm each reciprocation period and with null cycle that the target empty rotary speed is associated between periodic inequality.The idling speed of ignition timing module adjustment motor comprises the ignition timing of regulating each cylinder based on periodic inequality separately.
In further feature, a kind of method of adjusting the idling speed of motor comprises the generation engine speed signal.Confirm the reciprocation period of each piston of engine cylinder based on engine speed signal.Confirm the periodic inequality between each reciprocation period and null cycle related with the target empty rotary speed.The adjustment idling speed comprises the ignition timing of regulating each cylinder based on periodic inequality separately.
In other further feature, the method that a kind of each cylinder from motor generates common torque comprises the generation engine speed signal.Confirm the reciprocation period of each piston of engine cylinder based on engine speed signal.Confirm the periodic inequality between each reciprocation period and null cycle related with the target empty rotary speed.When motor turns round with idling speed, mate each other based on the torque output of each cylinder of cycle official post.
In another feature, described adjustment comprises incrementally adjusting ignition timing.
In another feature, described adjustment comprises in advance or retarded spark timing.
In another feature, described method further comprises the adjustment ignition timing, confirms whether motor turns round under stable state, further adjustment ignition timing when motor turns round under stable state.
In another characteristic, when motor turned round under idle running, described adjustment occurred.
In a characteristic again, the ignition timing regulated value is generated.The ignition timing regulated value is stored.In case motor turns round, just cause the igniting of motor based on the ignition timing regulated value under idling speed.
The description that provides from this paper can be understood other application.It should be understood that description and specific examples are intended to only be used for purpose of illustration, are not intended to limit the scope of the present disclosure.
Description of drawings
Accompanying drawing described herein is not intended to limit by any way the scope of the present disclosure just for purpose of explanation.
Fig. 1 is the functional block diagram according to embodiment's of the present disclosure exemplary space rotary speed control system;
Fig. 2 is the logical flow chart of diagram according to the method for the idling speed of embodiment's of the present disclosure control motor; With
Fig. 3 is a functional block diagram of carrying out the example modules of controlling according to the embodiment's of the present disclosure race of engine.
Embodiment
A kind of method of controlling the idling speed of motor comprises the adjusting of the ignition timing of gas flow modulation and engine cylinder.Be conditioned to regulate current idling speed towards the air-flow of motor and make it and selected idling speed coupling.Fluctuation in the no-load speed of regulating is proofreaied and correct through adjusting ignition timing.Ignition timing is regulated and is dynamically carried out.Reduce to be used for maximum igniting (MBT) value of best torque through retarded spark timing.The MBT value reduces manyly more, and available extent of competence is just big more.This scope is known as torque reserve.Because the torque that provides output reduces, thus when engine speed occurring under towards the time, the increase of electronic spark advance causes the torque increase.Torque increases, and has just increased the speed of motor, thereby has dashed under having proofreaied and correct.
The idling speed control of being stated is to provide through the closed loop based on selected idling speed.When said control was worked, identical electronic spark advance was proofreaied and correct by equalization and is applied to all cylinders during each recurrence event.This provides the constrained control to the torque output of each cylinder, and the ability that therefore provides limited preventing to dally fluctuation.The control of being stated influences idling speed, but does not proofread and correct the difference from the torque of separate cylinders.The disclosed embodiment of hereinafter provides improved output torque control and the improved idling speed performance to each cylinder.
The hereinafter description of preferred embodiments is exemplary in essence, never is intended to limit invention, its application, or uses.For the purpose of clear, with using identical reference character to refer to similar element in the accompanying drawings.The term " module " that uses like this paper refers to ASIC (ASIC), electronic circuit, processor (share, special-purpose or group), carry out storage, the combinational logic circuit of one or more software or firmware program or other suitable element of desired function property is provided.
With reference now to Fig. 1,, it has shown exemplary engine idle running control system 10.Race of engine control system 10 comprises motor 12, intake manifold 14 and gas exhaust manifold 16.Air is inhaled into intake manifold 14 through throttle valve 18, and is assigned to cylinder 20.Air and fuel mix, air/fuel mixture is compressed igniting in cylinder 20.This just reciprocally drives the piston in the respective cylinder 20.Race of engine control system 10 also comprises the ignition system 21 of being with spark plug 22, and said spark plug 22 is related with each cylinder 20, and causes the combustion incident in the cylinder.Piston by back and forth driving drives bent axle 24 rotationally.Exhausting air is discharged from cylinder 20 through gas exhaust manifold 16.
Idling speed control module 30 is controlled the running of adjusting engine system 10 based on no-load speed of the present disclosure.Engine speed indication sensor 32 generates the engine speed index signal.Engine speed sensor 32 can comprise crankshaft position sensor, and generates crankshaft-position signal based on the pivotal position of bent axle 24.Engine speed sensor 32 can comprise camshaft-signal sensor, transmission sensors etc.And control module 30 is confirmed each position of piston in engine speed and each cylinder based on the engine speed index signal.
Motor 12 uses the four-stroke combustion cycle running.During aspirating stroke, the piston of motor 12 moves to lower dead center (BDC) position from top dead center (TDC) position in the corresponding cylinder downstream, simultaneously suction air/fuel mixture (that is aspirating stroke).In case reached the BDC position, piston upwards moves with compressed air/fuel mixture (that is compression stroke) in cylinder.When piston is in the tdc position part or when neighbouring, relevant spark plug is lighted a fire to air/fuel mixture.The burning of air/fuel mixture with piston towards the BDC position to pushing back (that is power stroke) to drive bent axle 24.After combustion incident, piston moves upward towards tdc position once more, and exhausting air is pushed out to (that is exhaust stroke) in the exhausting air manifold.
Ignition timing refers to the time point that spark plug is lighted a fire to air/fuel mixture, and ignition timing is based on the position of cylinder inner carrier.Can position of piston be provided according to the pivotal position of bent axle.For example, the ignition timing of concrete cylinder can be provided as X ° before the TDC.Therefore, bent axle was in X ° before igniting betided the TDC in the piston arrives cylinder.Can be postponed or in advance with respect to each current ignition timing position to the ignition timing of each cylinder.
Race of engine control about the disclosed embodiment of this paper describes is exported through the torque of adjusting each cylinder based on the ignition timing of regulating each cylinder independently.Race of engine control is used ignition timing to each cylinder and is proofreaied and correct.More specifically, the reciprocation period (t as each piston in each burn cycle of torque indication is kept watch in no-load speed control RECi), wherein i is the piston/cylinder number.Piston/cylinder number i can increase progressively according to the ignition order of spark plug 22.Reciprocation period t RECiConfirm according to following relation:
t RECi＝1/RPM i
RPM wherein iIt is the engine speed during the burn cycle of cylinder i.Reciprocation period t RECiShort more, the torque output of cylinder is big more.
Control module 30 is confirmed periodic inequality Δ t based on following relation i:
Δt i＝t RECi-t IDLE
T wherein IDLEBe and target engine idling speed RPM IDLEThe cycle that is associated.The periodic inequality Δ t of each cylinder that race of engine control ratio joins with the present engine velocity correlation i, and calculate average reciprocation period Δ t AVGIn one embodiment, average reciprocation period Δ t AVGBe associated with the burn cycle of each cylinder.In another embodiment, average reciprocation period Δ t AVGBe associated with a plurality of burn cycle of each cylinder.Control module 30 is used based on reciprocation period t RECiClosed loop control, be each cylinder 20 adjusting ignition timing individually, with average reciprocation period Δ t AVGBe complementary.Average reciprocation period Δ t AVGConfirm according to following relation:
Δt AVG＝(Δt 1+Δt 2+...Δt i)/i
Each periodic inequality Δ t iThe mean value that can represent the periodic inequality of piston in one or more burn cycle.
Ignition timing is based on time difference Δ t iWith average reciprocation period Δ t AVGRegulate.The ignition timing regulated value is based on periodic inequality Δ t iWith average reciprocation period Δ t AVGBetween difference confirm.The ignition timing regulated value can be stored in the storage 34 and/or be used for changing the ignition timing of each cylinder.The ignition timing of each cylinder can incrementally be regulated.For example, ignition timing can be regulated with one or more 1 ° increases progressively.The incremental permission no-load speed control of ignition timing confirms whether ignition timing is suitably regulated (that is, being shifted to an earlier date the correct degree that perhaps is delayed to).For example, no-load speed control can adjusting ignition timing, after regulating, waits for, moves under equilibrium mode until motor, reappraises the reciprocating motion of the pistons cycle that is updated, subsequently in due course between adjusting ignition timing once more.
The equilibrium mode of motor can mean engine dallies under approximately constant speed in the scheduled time slot.The equilibrium mode of motor can be in addition or alternately each piston of mean engine have constant operating rate and/or relevant reciprocation period reaches in the scheduled time slot.
No-load speed control is adaptive, and reason is that the ignition timing value and the lasting adjusting ignition timing of each cylinder 20 known in said no-load speed control along with the change of state of motor 12 (for example because aging).Through with the periodic adjustment of each burn cycle of all cylinders to equal values, just eliminated the torque output fluctuation of motor 12, reason is the identical torque of all cylinders outputs in this operation point.Can use technology described herein to be able to proofread and correct with the deviation of selected idling speed.The technology that embodiment of the present disclosure provided has minimized and/or has eliminated the torque ripple of motor.
With reference now to Fig. 2,, it has shown the logical flow chart of the method for the idling speed that illustrates the control motor.This method can comprise a plurality of adjusting circulations.In other words, following steps can repeat.In step 200, control flow is confirmed whether motor is under the idling speed and is turned round.If motor is not in idle running, control flow winding and repeating step 200.When motor turned round under idle running, control flow is execution in step 202-218 forward.When motor is similar to when under idling speed, turning round execution in step 202-214.In step 202, control flow counter i is set to equal 1.Counter i representes i piston and/or cylinder, can in step 202, be increased progressively according to this value of ignition order of engine cylinder.
In step 204, control flow is based on the engine speed signal monitor engine speed that generates.In step 206, control flow calculates reciprocation period t RECiControl flow calculates periodic inequality Δ t in step 208 i
In step 210, control flow confirms whether i equals N+1, and N is the number of piston of engine and/or cylinder here.When i was not equal to N+1, control flow made i increase progressively 1 in step 212, and winding to step 204.When i equals N+1, be determined for all cylinder Δ t, control flow continues in step 214.In step 214, control flow is confirmed average reciprocation period Δ t AVG
In step 215, control flow confirms whether motor turns round under idling speed.When control was being turned round with idling speed, control flow advanced to step 217, otherwise control flow advances to step 216.In step 216, control flow storage ignition timing regulated signal.
In step 217, control flow is regulated the ignition timing of independent cylinder based on the ignition timing regulated signal.
In step 218, control flow confirms as stated whether motor is in equilibrium condition.When motor was in equilibrium condition, control flow can be back to step 200.
With reference now to Fig. 3,, with describing the example modules of carrying out no-load speed control of the present disclosure in detail.Example modules comprises RPM monitor module 300, reciprocating motion of the pistons module 302, target idle block 304, difference block 306, average to-and-fro motion module 308 and ignition timing module 310.The speed of engine speed module 300 monitor engine, the speed of motor can be represented with rpm (RPM).Engine speed module 300 is based on bent axle piston sensor output formation speed signal.Reciprocating motion of the pistons module 302 is confirmed the reciprocation period t of each cylinder of motor based on the speed of motor RECi
Target idle block 304 is based on idling speed RPM IDLEConfirm target null cycle t IDLEDifference block 306 is based on the reciprocation period t of respective pistons RECiWith target null cycle t IDLECalculate the periodic inequality Δ t of each cylinder iAverage to-and-fro motion module 308 is based on the periodic inequality Δ t of each cylinder iConfirm average reciprocation period Δ t AVG
Ignition timing module 310 is based on periodic inequality Δ t iWith average reciprocation period Δ t AVGBetween difference adjustment ignition timing so that the cylinder output torque of coupling to be provided.Ignition timing module 310 is based on lower state signal 311 adjusting ignition timings that come homeostasis module 312.Stable state module 312 based on engine speed signal and/or velocity of piston index signal (for example based on reciprocating motion of the pistons cycle t RECiSignal) confirm when motor 12 turns round with equilibrium mode.
As an example, ignition timing module 310 can be with period 1 difference Δ t 1With average reciprocation period Δ t AVGCompare, and regulate the ignition timing of first cylinder, this comprises the period 1 difference Δ t that upgrades burn cycle subsequently 1, and make it and average reciprocation period Δ t AVGCoupling.The ignition timing of first spark plug of first cylinder is shifted to an earlier date or is postponed.Ignition timing module then 310 can be with difference Δ t second round 2With average reciprocation period Δ t AVGCompare, and regulate the ignition timing of second cylinder, this comprises difference Δ t second round that upgrades burn cycle subsequently 2, and make it and average reciprocation period Δ t AVGCoupling.The ignition timing of second spark plug of second cylinder is shifted to an earlier date or is postponed.The adjusting of the ignition timing of second spark plug can be identical or different with the adjusting of the ignition timing of first spark plug.When adjusting ignition timing, the ignition timing of one or more cylinder of motor 12 can be constant.
Those skilled in the art can recognize that broad teachings of the present disclosure can realize with many kinds of forms from aforementioned description now.Therefore, although embodiment disclosed herein describes about concrete example, these embodiments' true scope should not be restricted, and its reason is that those skilled in the art can understand other modification after research accompanying drawing, specification and accompanying claims.

Claims (18)

1. idling speed control system that is used for motor comprises:
Generate the engine speed module of engine speed signal;
The reciprocating motion of the pistons module, it confirms the reciprocation period of each piston of said engine cylinder based on said engine speed signal;
Difference block, its confirm each said reciprocation period and with null cycle that the target empty rotary speed is associated between periodic inequality; With
The ignition timing module, the idling speed that it adjusts said motor comprises the ignition timing of regulating each said cylinder based on said periodic inequality respectively.
2. idling speed control system according to claim 1 is characterized in that, further comprises average to-and-fro motion module, and it calculates average reciprocation period based on said periodic inequality,
Wherein said ignition timing module is regulated the ignition timing of each said cylinder based on said average reciprocation period.
3. idling speed control system according to claim 2; It is characterized in that; Said ignition timing module will differ from the period 1 and said average reciprocation period compares; And regulate the ignition timing of first cylinder, the period 1 difference that comprises the period 1 difference of upgrading burn cycle subsequently and make said burn cycle subsequently and said average reciprocation period coupling and
Wherein said ignition timing module will differ from said average reciprocation period and compare second round; And regulate the ignition timing of second cylinder, this comprise upgrade burn cycle subsequently second round difference and make said burn cycle subsequently second round difference with said average reciprocation period coupling.
4. no-load speed control system according to claim 1 is characterized in that, said ignition timing module is incrementally regulated the said ignition timing of each said cylinder.
5. no-load speed control system according to claim 4 is characterized in that, said ignition timing module is regulated cycle period at each said ignition timing is incrementally once regulated.
6. no-load speed control system according to claim 1 is characterized in that, said ignition timing module shifts to an earlier date or postponement the said ignition timing of each said cylinder when regulating said ignition timing.
7. no-load speed control system according to claim 1 is characterized in that, said ignition timing module is regulated the said ignition timing of each said cylinder differently.
8. no-load speed control system according to claim 1 is characterized in that, further comprises the stable state module, and it generates the steady-state signal of the state of the said motor of indication,
Wherein said ignition timing module is regulated said ignition timing based on said steady-state signal.
9. no-load speed control system according to claim 1 is characterized in that, when said motor turned round with other speed that is different from said idling speed, said ignition timing module prevented adjusting ignition timing.
10. method of adjusting the idling speed of motor comprises:
Generate engine speed signal;
Confirm the reciprocation period of each piston of said engine cylinder based on said engine speed signal;
Confirm the periodic inequality between each said reciprocation period and null cycle related with the target empty rotary speed; With
Adjust said idling speed, comprise the ignition timing of regulating each said cylinder based on said periodic inequality separately.
11. method according to claim 10 is characterized in that, adjusts said idling speed and comprises:
Calculate average reciprocation period based on said periodic inequality; With
Regulate the ignition timing of each said cylinder based on said average reciprocation period.
12. method according to claim 10 is characterized in that, adjusts said idling speed and comprises the said ignition timing of regulating each said cylinder differently.
13. method according to claim 10 is characterized in that, further comprises:
Store the regulated value of said ignition timing; With
When said motor turns back to when under said idling speed, turning round,, cause the igniting of said motor based on said regulated value.
14. one kind generates the method for common torque from each cylinder of motor, comprising:
Generate engine speed signal;
Confirm the reciprocation period of each piston of said engine cylinder based on said engine speed signal;
Confirm the periodic inequality between each said reciprocation period and null cycle related with the target empty rotary speed; With
When said motor turns round with idling speed, mate each other based on the said torque output of said each said cylinder of cycle official post,
Wherein mate said torque output and comprise the ignition timing of regulating each said cylinder based on said periodic inequality respectively.
15. method according to claim 14 is characterized in that, matees said torque output and comprises:
Calculate average reciprocation period based on said periodic inequality; With
Regulate the ignition timing of each said cylinder based on said average reciprocation period.
16. method according to claim 15 comprises:
The period 1 difference is compared with said average reciprocation period; And regulate the ignition timing of first cylinder; Comprise the period 1 difference of upgrading burn cycle subsequently and the period 1 difference that makes said burn cycle subsequently and said average reciprocation period coupling and
To differ from said average reciprocation period second round and compare; And regulate the ignition timing of second cylinder, comprise upgrade burn cycle subsequently second round difference and make said burn cycle subsequently second round difference with said average reciprocation period coupling.
17. method according to claim 14 is characterized in that, matees said torque output and comprises the said ignition timing of incrementally regulating each said cylinder.
18. method according to claim 14 is characterized in that, matees said torque output and comprises the said ignition timing of regulating each said cylinder differently.
CN2008101497637A 2008-04-22 2008-09-25 Method for improving idle quality by torque smoothing Expired - Fee Related CN101566118B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US12/107,269 2008-04-22
US12/107269 2008-04-22
US12/107,269 US7523738B2 (en) 2007-06-22 2008-04-22 Idle quality by torque smoothing

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CN101566118B true CN101566118B (en) 2012-10-24

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114412682B (en) * 2022-01-04 2023-12-15 武汉菱电汽车电控***股份有限公司 Separate cylinder ignition control method and system for enhancing idle speed stability

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Publication number Priority date Publication date Assignee Title
GB2173925A (en) * 1985-03-19 1986-10-22 Diesel Kiki Co Idling speed control
US4742462A (en) * 1984-09-22 1988-05-03 Diesel Kiki Co., Ltd. Apparatus for controlling idling operation of an internal combustion engine
US5697337A (en) * 1995-11-30 1997-12-16 Nissan Motor Co., Ltd. Engine rotation speed controller
JP2000205025A (en) * 1999-01-14 2000-07-25 Fuji Heavy Ind Ltd Control apparatus for engine
CN1380494A (en) * 2002-05-17 2002-11-20 西安交通大学 Miniature carburetor gasoline enging digital ignition control method capable of regulating idle speed and its equipment
CN1912378A (en) * 2005-08-12 2007-02-14 安德烈亚斯.斯蒂尔两合公司 Ignition circuit having a high-energy spark for an internal combustion engine
CN101144436A (en) * 2006-09-13 2008-03-19 通用汽车环球科技运作公司 Idle stability improvement for direct injected engines

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4742462A (en) * 1984-09-22 1988-05-03 Diesel Kiki Co., Ltd. Apparatus for controlling idling operation of an internal combustion engine
GB2173925A (en) * 1985-03-19 1986-10-22 Diesel Kiki Co Idling speed control
US5697337A (en) * 1995-11-30 1997-12-16 Nissan Motor Co., Ltd. Engine rotation speed controller
JP2000205025A (en) * 1999-01-14 2000-07-25 Fuji Heavy Ind Ltd Control apparatus for engine
CN1380494A (en) * 2002-05-17 2002-11-20 西安交通大学 Miniature carburetor gasoline enging digital ignition control method capable of regulating idle speed and its equipment
CN1912378A (en) * 2005-08-12 2007-02-14 安德烈亚斯.斯蒂尔两合公司 Ignition circuit having a high-energy spark for an internal combustion engine
CN101144436A (en) * 2006-09-13 2008-03-19 通用汽车环球科技运作公司 Idle stability improvement for direct injected engines

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