CN105386882A - Preignition control method for supercharge non-direct-injection gasoline engine - Google Patents

Preignition control method for supercharge non-direct-injection gasoline engine Download PDF

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Publication number
CN105386882A
CN105386882A CN201510699432.0A CN201510699432A CN105386882A CN 105386882 A CN105386882 A CN 105386882A CN 201510699432 A CN201510699432 A CN 201510699432A CN 105386882 A CN105386882 A CN 105386882A
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CN
China
Prior art keywords
engine
super detonation
detonation
super
signal
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.)
Pending
Application number
CN201510699432.0A
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Chinese (zh)
Inventor
雷现齐
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing Changan Automobile Co Ltd
Original Assignee
Chongqing Changan Automobile Co Ltd
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Filing date
Publication date
Application filed by Chongqing Changan Automobile Co Ltd filed Critical Chongqing Changan Automobile Co Ltd
Priority to CN201510699432.0A priority Critical patent/CN105386882A/en
Publication of CN105386882A publication Critical patent/CN105386882A/en
Pending legal-status Critical Current

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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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1473—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the regulation method
    • F02D41/1475—Regulating the air fuel ratio at a value other than stoichiometry
    • 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
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
    • F02D41/402—Multiple injections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
    • F02D35/027—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions using knock sensors
    • 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
    • F02D41/0087—Selective cylinder activation, i.e. partial cylinder operation
    • 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)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

The invention provides a preignition control method for a supercharge non-direct-injection gasoline engine. The preignition control method includes the steps that during calibrating and matching of an engine pedestal, the threshold value A generated when super detonation happens is calibrated according to the pressure of an engine cylinder and the intensity of detonation sounds; whether super detonation happens or not is judged according to whether an engine water temperature signal, an engine rotating speed signal and an engine relative inflation load signal exceed the limitation or not and whether a detonation sound intensity signal B is larger than A or not; when a controller judges that super detonation happens, the inflation load of the engine is controlled to be reduced, and the rich mixture air-fuel ratio is increased; and after the calibration time continues and no super detonation is detected, the controller can recover the due operation conditions within the calibration time. According to the preignition control method, the probability of occurrence of super detonation can be effectively reduced, and a whole vehicle is better in reliability and comfort.

Description

A kind of supercharging non-straight spray petrol engine pre-ignition controlling method
Technical field
The present invention relates to a kind of logic control method for solving the pre-ignition of supercharging non-straight spray petrol engine.
Background technique
Carry supercharging non-straight and spray petrolic vehicle operating when some operating mode, easily occur the situation of mixed gas spontaneous combustion without igniting in engine chamber, this phenomenon is called pre-ignition or super detonation.The appearance of super detonation is attended by strong metal knock, and time serious, driver can feel the phenomenon that power interrupts suddenly.There is hot point, carbon distribution and the factor such as particulate matter, controlled compression ignite in the reason possibility organic oil of super detonation, cylinder.The appearance of super detonation has a strong impact on engine reliability and car load driving comfortability.
At present, in-cylinder direct fuel-injection engine can use secondary injection technology effectively to reduce super detonation, but PFI motor does not possess this function due to hardware reason.Therefore, super detonation becomes the technical barrier that the non-direct fuel-injection engine of supercharging must solve.
Summary of the invention
The object of this invention is to provide a kind of controlling method solving the spray petrol engine pre-ignition of supercharging non-straight or super detonation, motor is run more steadily controlled, improve reliability and the travelling comfort of car load.
Technological scheme of the present invention is as follows:
A kind of supercharging non-straight spray petrol engine pre-ignition controlling method, its logic step is:
When engine pedestal calibration, make threshold values A when there is super detonation according to engine cylinder pressure and knocking loudness of a sound scale;
Relatively inflate load signal according to engine water temperature signal, engine rotational speed signal, motor and whether exceed restriction, and whether pinking intensity of sound signal B is greater than A, judge whether super detonation occurs;
When controller is determined with super detonation generation, the reduction controlling motor inflates load and enriching gasoline air mixture ratio;
After continuing the nominal time, when detecting without super detonation, controller will recover the due operating conditions of motor within the nominal time.
The present invention, in order to effectively reduce super detonation occurrence frequency, suitably reduces engine target load, enriching air fuel ratio in the incident external characteristics region of super detonation.This Pre-control measures can prevent super detonation from occurring in advance, but can affect the dynamic economics of car load.Motor with VVT also can reduce super detonation probability of happening by the mode reducing valve overlap.
Adopt controlling method of the present invention can effectively reduce super detonation probability of happening, make car load have better reliability and travelling comfort.
Accompanying drawing explanation
Fig. 1 is logic diagram of the present invention;
Fig. 2 is schematic flow sheet of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
See Fig. 1, total controlling method of solution super detonation of the present invention is: during engine pedestal calibration, makes threshold values A when there is super detonation according to engine cylinder pressure and knocking loudness of a sound scale.Super detonation testing module judges whether super detonation occurs according to the signal B that detonation sensor records.As B > A, controller is judged to be now have super detonation to occur.Now system will reduce the inflation load of motor and enriching gasoline air mixture ratio.This measure can continue for some time (can demarcate).When systems axiol-ogy is to during without super detonation, controller will within a certain period of time (can demarcate) recovers the due operating conditions of motor.
Concrete control logic is as shown in Figure 2:
1, super detonation testing module relatively inflate load signal according to engine rotational speed signal, motor, detonation signal judge whether occur super detonation.
When following condition meets simultaneously, be then judged to super detonation occurs:
(1) engine water temperature restricted T, wherein T>60 DEG C;
(2) engine speed restriction N, wherein N<3000rpm;
(3) engine load restriction R, wherein R>70%;
(4) detonation signal integral value B, the threshold values A of super detonation, wherein B>A.A value can be distinguished to some extent according to system definition, and this threshold values should complete demarcation when Bench calibration mates.
2, after super detonation testing module detects super detonation, result is inputed to super detonation Executive Module, the signal reducing engine load and enriching air fuel ratio is inputed to final controlling element and carries out concrete operation by super detonation Executive Module.
3, when after above-mentioned measure (this measure can continue the nominal time), if still detected, super detonation occurs, and controller will carry out oil-break process to corresponding engine cylinder until super detonation disappears.
4, after super detonation not detected, system (demarcation) will recover the corresponding operating mode of motor within a period of time.

Claims (3)

1. a supercharging non-straight spray petrol engine pre-ignition controlling method, it is characterized in that, described method is when engine pedestal calibration, makes threshold values A when there is super detonation according to engine cylinder pressure and knocking loudness of a sound scale;
Relatively inflate load signal according to engine water temperature signal, engine rotational speed signal, motor and whether exceed restriction, and whether pinking intensity of sound signal B is greater than A, judge whether super detonation occurs;
When controller is determined with super detonation generation, the reduction controlling motor inflates load and enriching gasoline air mixture ratio;
After continuing the nominal time, when detecting without super detonation, controller will recover the due operating conditions of motor within the nominal time.
2. supercharging non-straight spray petrol engine pre-ignition controlling method according to claim 1, is characterized in that, when following condition meets simultaneously, be judged to super detonation occurs:
Engine water temperature restricted T, wherein T>60 DEG C;
Engine speed restriction N, wherein N<3000rpm;
Engine load restriction R, wherein R>70%;
Knock sensor signal integral value B, super detonation threshold values A, wherein B>A.
3. supercharging non-straight spray petrol engine pre-ignition controlling method according to claim 1 and 2, is characterized in that, for the motor of band VVT, reduce super detonation probability of happening by the mode reducing valve overlap.
CN201510699432.0A 2015-10-26 2015-10-26 Preignition control method for supercharge non-direct-injection gasoline engine Pending CN105386882A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510699432.0A CN105386882A (en) 2015-10-26 2015-10-26 Preignition control method for supercharge non-direct-injection gasoline engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510699432.0A CN105386882A (en) 2015-10-26 2015-10-26 Preignition control method for supercharge non-direct-injection gasoline engine

Publications (1)

Publication Number Publication Date
CN105386882A true CN105386882A (en) 2016-03-09

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CN201510699432.0A Pending CN105386882A (en) 2015-10-26 2015-10-26 Preignition control method for supercharge non-direct-injection gasoline engine

Country Status (1)

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CN (1) CN105386882A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106640396A (en) * 2016-12-16 2017-05-10 天津大学 Super knock restraining method based on multi-parameter adjustment and control
CN106930845A (en) * 2017-04-12 2017-07-07 潍柴西港新能源动力有限公司 A kind of gas engine detonation scaling method
CN107366575A (en) * 2016-05-12 2017-11-21 通用汽车环球科技运作有限责任公司 The method and system for detecting and alleviating for engine automatic ignition
CN108593306A (en) * 2018-06-20 2018-09-28 浙江吉利控股集团有限公司 A kind of detection method and detecting system for vehicle motor
CN109763903A (en) * 2017-11-10 2019-05-17 马自达汽车株式会社 The control device of compression ignition engine
CN111997767A (en) * 2020-09-04 2020-11-27 东风汽车集团有限公司 Method and device for controlling air inflow for inhibiting knocking under pre-ignition and high-intensity knocking
CN112112736A (en) * 2020-09-01 2020-12-22 东风汽车集团有限公司 Control method for reducing super detonation frequency
CN112177782A (en) * 2020-09-30 2021-01-05 重庆长安汽车股份有限公司 Super-knocking abnormal combustion processing control method for supercharged gasoline engine
CN112943466A (en) * 2021-02-07 2021-06-11 浙江吉利控股集团有限公司 Pre-ignition control method and system for flexible fuel engine, vehicle and storage medium
CN115126613A (en) * 2021-03-29 2022-09-30 广州汽车集团股份有限公司 Engine pre-ignition control method and device and computer storage medium
CN115142972A (en) * 2021-03-29 2022-10-04 广州汽车集团股份有限公司 Control method, device and system for out-of-control pre-ignition of engine

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WO2015128972A1 (en) * 2014-02-26 2015-09-03 日産自動車株式会社 Internal combustion engine control device and control method
CN104405510A (en) * 2014-09-30 2015-03-11 长城汽车股份有限公司 Control method and control system of engine, and vehicle
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Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107366575A (en) * 2016-05-12 2017-11-21 通用汽车环球科技运作有限责任公司 The method and system for detecting and alleviating for engine automatic ignition
CN107366575B (en) * 2016-05-12 2020-01-03 通用汽车环球科技运作有限责任公司 Method and system for engine auto-ignition detection and mitigation
CN106640396A (en) * 2016-12-16 2017-05-10 天津大学 Super knock restraining method based on multi-parameter adjustment and control
CN106930845A (en) * 2017-04-12 2017-07-07 潍柴西港新能源动力有限公司 A kind of gas engine detonation scaling method
CN106930845B (en) * 2017-04-12 2019-08-27 潍柴西港新能源动力有限公司 A kind of gas engine detonation scaling method
CN109763903A (en) * 2017-11-10 2019-05-17 马自达汽车株式会社 The control device of compression ignition engine
CN109763903B (en) * 2017-11-10 2021-10-29 马自达汽车株式会社 Control device for compression ignition engine
CN108593306A (en) * 2018-06-20 2018-09-28 浙江吉利控股集团有限公司 A kind of detection method and detecting system for vehicle motor
CN108593306B (en) * 2018-06-20 2020-09-25 浙江吉利控股集团有限公司 Detection method and detection system for vehicle engine
CN112112736A (en) * 2020-09-01 2020-12-22 东风汽车集团有限公司 Control method for reducing super detonation frequency
CN111997767B (en) * 2020-09-04 2021-10-22 东风汽车集团有限公司 Method and device for controlling air inflow for inhibiting knocking under pre-ignition and high-intensity knocking
CN111997767A (en) * 2020-09-04 2020-11-27 东风汽车集团有限公司 Method and device for controlling air inflow for inhibiting knocking under pre-ignition and high-intensity knocking
CN112177782A (en) * 2020-09-30 2021-01-05 重庆长安汽车股份有限公司 Super-knocking abnormal combustion processing control method for supercharged gasoline engine
CN112177782B (en) * 2020-09-30 2021-10-12 重庆长安汽车股份有限公司 Super-knocking abnormal combustion processing control method for supercharged gasoline engine
CN112943466A (en) * 2021-02-07 2021-06-11 浙江吉利控股集团有限公司 Pre-ignition control method and system for flexible fuel engine, vehicle and storage medium
CN112943466B (en) * 2021-02-07 2022-08-30 浙江吉利控股集团有限公司 Pre-ignition control method and system for flexible fuel engine, vehicle and storage medium
CN115126613A (en) * 2021-03-29 2022-09-30 广州汽车集团股份有限公司 Engine pre-ignition control method and device and computer storage medium
CN115142972A (en) * 2021-03-29 2022-10-04 广州汽车集团股份有限公司 Control method, device and system for out-of-control pre-ignition of engine
CN115142972B (en) * 2021-03-29 2023-12-22 广州汽车集团股份有限公司 Control method, device and system for engine pre-ignition runaway
CN115126613B (en) * 2021-03-29 2024-04-16 广州汽车集团股份有限公司 Engine pre-ignition control method and device and computer storage medium

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Application publication date: 20160309