CN100526629C - Engine oil gas mixing ECU control method - Google Patents
Engine oil gas mixing ECU control method Download PDFInfo
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- CN100526629C CN100526629C CNB2007101186493A CN200710118649A CN100526629C CN 100526629 C CN100526629 C CN 100526629C CN B2007101186493 A CNB2007101186493 A CN B2007101186493A CN 200710118649 A CN200710118649 A CN 200710118649A CN 100526629 C CN100526629 C CN 100526629C
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000002156 mixing Methods 0.000 title claims description 14
- 239000010705 motor oil Substances 0.000 title claims description 12
- 239000000446 fuel Substances 0.000 claims abstract description 55
- 239000007789 gas Substances 0.000 claims abstract description 34
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 26
- 239000001301 oxygen Substances 0.000 claims abstract description 26
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 239000003921 oil Substances 0.000 claims description 45
- 238000002347 injection Methods 0.000 claims description 36
- 239000007924 injection Substances 0.000 claims description 36
- 238000012937 correction Methods 0.000 claims description 32
- 230000009467 reduction Effects 0.000 claims description 20
- 238000002485 combustion reaction Methods 0.000 claims description 11
- 238000010304 firing Methods 0.000 claims description 8
- 230000003197 catalytic effect Effects 0.000 claims description 7
- 239000000498 cooling water Substances 0.000 claims description 6
- 238000005474 detonation Methods 0.000 claims description 6
- 239000003054 catalyst Substances 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 230000003993 interaction Effects 0.000 claims description 4
- 238000013021 overheating Methods 0.000 claims description 4
- 241001269238 Data Species 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 claims description 3
- 238000000205 computational method Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 238000005507 spraying Methods 0.000 abstract 5
- 238000012545 processing Methods 0.000 description 5
- 239000000295 fuel oil Substances 0.000 description 4
- 239000003502 gasoline Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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Abstract
The invention relates to a controlling method of fuel-air mixture electronic control unit (ECU) of engine. In the controlling method, through acquisition of air inlet temperature and pressure, water temperature, engine rotational speed, throttle position and oxygen sensor signal, the ECU accurately controls the oil (gas) spraying quantity and ignition angle; the oil (gas) spraying adopts multipoint grouping or multipoint sequential technique, and the ECU calculates the actual oil (gas) spraying quantity and actual oil (gas) spraying time with one same algorithm and two sets of rating data in the same hardware platform; the ECU performs closed-loop control to air fuel ratio; the oil (gas) spraying is controlled based on the torque of an electronic air throttle, and ECU acquires the air throttle pedal position signal and calculates the maximal torque at that time to control the opening extent of the air throttle. The controlling method can remarkably improve the performance of engine, obtain the optimal air fuel ratio under various operating conditions, and make the automobile to achieve the optimal dynamic force.
Description
Technical field
The present invention relates to gasoline/natural gas double-fuel and mix supply control field, be specifically related to a kind of controlling method of engine oil gas mixing ECU.
Background technique
Gasoline/natural gas vehicle by double fuels is by combustion gas mixing apparatus for controlling of supply difference, the mixer air supply system and the electric-controlled gas that can be divided into open loop mixed gas air supply system, the charged control dynamic valve of closed loop spray three major types, the difference of its isolated plant is mainly reflected in the generation type to mixed gas, to the mixture strength control mode, and be the jet control of single-point, or on a few components such as the jet control of multi-point sequent, other isolated plant is basic identical.At present, generally adopt the closed loop control system of mixed gas mode on the EFI car both domestic and external.The fuel combination ECU that the sunlight Tyke is researched and produced belongs to the electric-controlled injection control types, and no matter fuel oil is controlled still jet control, all adopts multiple spot grouping or multi-point sequent technology.Indexs such as the power character after its coupling, emission performance, fuel economy substantially all have a distinct increment than the index of the employed combiner technique of domestic most EFI car, but also do not reach optimum aspect air fuel ratio.Present gasoline, rock gas mix that two kinds of algorithms, two kinds of nominal datas are used in control mostly and when realizing based on a plurality of hardware platforms, implement all more complicated of software and hardware, control mostly is in oil-fired system based on moment of torsion.
The optimum igniting advance angle is with many factors vary, and the optimal air-fuel ratio and the automobile best power source that accurately calculate under ignition advance angle and the various operating modes of acquisition are the targets of the control of engine gas or fuel oil ECU always.
Summary of the invention
Order of the present invention provides a kind of fuel combination ECU controlling method, and this controlling method can greatly improve engine performance, can obtain the optimal air-fuel ratio under the various operating modes and make automobile reach best power performance.
For achieving the above object, the present invention adopts following technological scheme:
A kind of controlling method of engine oil gas mixing ECU is characterized in that, this method may further comprise the steps:
S1: the flow and the quality that detect air inlet by the suction pressure temperature transducer;
Gather engine temperature signal by cooling-water temperature sensor;
Gather the engine crankshaft tach signal by crankshaft position sensor;
Knocking state by the detonation sensor detection of engine;
By throttle body sensor acquisition throttle opening signal;
Gather the oxygen content signal by preceding lambda sensor and post oxygen sensor;
S2:ECU is that benchmark is determined ignition advance angle, oil spout or jet timing with the engine crankshaft tach signal of crankshaft position sensor collection, and cooperates camshaft signal to judge the working state of each cylinder of motor;
S3: become the voltage sample signal to be delivered to ECU the oxygen content signal conversion of preceding lambda sensor and post oxygen sensor collection, ECU adjusts the excess air factor value at any time with the variation of voltage sample signal, carries out oil spout or jet program;
S4:ECU produces the ignition timing signal according to ignition advance angle, under the control of ignition timing signal, and the mixed gas in the spark ignitor firing chamber, ECU revises igniting and oil spout or jet pulse with the engine temperature signal of cooling-water temperature sensor collection;
S5: mixture combustion is after the outlet pipe discharge, pass through preceding lambda sensor, three-way catalytic converter and the post oxygen sensor of outlet pipe afterbody successively, ECU realizes with the excess air factor being the closed loop control of target according to the oxygen content signal of preceding lambda sensor collection, conversion and purification that exhaust farthest discharges pollutants through three-way catalytic converter, oxygen content SC sigmal control air fuel ratio according to the post oxygen sensor collection, more effective air fuel ratio is controlled at 14.7:1, makes tail gas reach more maximum discharge standard.
Wherein, in step S3, the oil spout program is calculated actual fuel injection amount and actual fuel injection time, calculate actual jet amount and actual jet time with jet program and use same set of computational methods and two cover nominal datas, oil spout or jet multiple spot grouping or the multi-point sequent technology of all adopting, the realization of algorithm is based on same set of hardware platform.
Wherein, in step S4, behind the mixed gas in the spark ignitor firing chamber, the knocking state of detonation sensor detection of engine, concurrent this signal of sample presentation is to ECU, and ECU to the borderline knock state, makes mixture combustion reach the optimum state according to sample signal control motor.
Correction obtains actual fuel injection amount, actual fuel injection time to the oil spout program that ECU carries out to basic fuel injection amount, and the jet program that ECU carries out obtains actual jet amount, actual jet time to jet substantially amount correction.
Basic fuel injection amount and jet substantially amount are determined according to the engine crankshaft tach signal of crankshaft position sensor collection and the throttle opening signal of throttle position sensor collection by ECU.
The oil spout program that ECU carries out is to the basic fuel injection amount correction, or the reduction value that jet program is used during to jet substantially amount correction comprises:
A) excess air factor correction coefficient during engine operation;
B) the jet or fuel injection quantity correction of warming-up during engine start;
C) idling oil spout or jet amount correction during engine retard;
D) ECU judges motor load condition at that time, full load oil spout under the full engine load situation or jet reduction value according to flow and quality that the suction pressure temperature transducer detects air inlet;
E) catalyzer heating correction factor and the jet or oil spout reduction value of catalyst overheating protection when the three-way catalytic converter work of outlet pipe afterbody;
Oil spout or jet amount of interference when F) carrying out oil spout or jet program;
Oil spout or jet Dead Time when G) carrying out oil spout or jet program;
Throttle opening signal by the throttle body sensor acquisition, wherein throttle opening is to utilize electronic throttle to control based on moment of torsion, by ECU computing engines moment of torsion, friction moment of torsion and inertia torque, obtain an engine output torque (flywheel output torque) according to the interaction of these three moments of torsion.These torque values can be used to control algorithms such as tractive force control, braking torque processing, the processing of gear shift moment of torsion, idle speed control, axletree torque protection and air-conditioning torque compensation.
Advantage of the present invention is that ECU passes through the collection to intake temperature pressure, water temperature, engine speed, throttle position, oxygen sensor signal, and oil spout (jet) amount and firing angle are accurately controlled, and can greatly improve the performance of motor; ECU carries out closed loop control to air fuel ratio, can obtain the optimal air-fuel ratio under the various operating modes, reduces the harmful gas in the discharging; Throttle opening utilizes electronic throttle to control based on moment of torsion, keeps Maximum Torque control constantly, can make automobile reach best power performance.
Description of drawings
Fig. 1 is the whole automatical control system schematic diagram of the present invention;
Algorithm flow chart when Fig. 2 carries out the oil spout program for ECU of the present invention;
Algorithm flow chart when Fig. 3 carries out jet program for ECU of the present invention;
Embodiment
Following examples are used to illustrate the present invention, but are not used for limiting the scope of the invention.
The whole electric control system controls principle of present embodiment as shown in Figure 1, system comprises electrical control system for engine unit ECU 100 and internal-combustion engine 110, and internal-combustion engine 110 comprises a plurality of cylinders, and Fig. 1 shows is wherein a cylinder.Motor sucks air inlet by intake manifold 120, makes it to enter the firing chamber through suction pressure temperature transducer 12 and throttle body 13.Air that intake manifold provides and fuel injector (gasoline or day burning petroleum gas) 10 forms empty combustion mixed gass, produces the spark ignition mixed gas through spark plug, and the waste gas of empty combustion mixture combustion by outlet pipe 130 with exhaust emissions in air.
Engine electric-controlled unit ECU 100, it comprise control program central processing unit CPU, be used for stored program RAM and FLASH, system power supply module, communication module, signal acquisition module, oil spout module, ignition module and multichannel control output module.
During engine operation, crankshaft position sensor 15 detects the rotation of bent axle, and send crankshaft-position signal to ECU 15, crankshaft-position signal is taked the form of a series of pulses, wherein each pulse is all produced on the process sensor 15 when rotated by the predetermined point on the bent axle, the rotating speed of the pulse frequency indication engine crankshaft of crankshaft-position signal.ECU is that benchmark is determined ignition advance angle, oil spout or jet timing with this signal, and cooperates camshaft signal to judge the working state of each cylinder of motor.
The oxygen content signal conversion that preceding lambda sensor 19 and post oxygen sensor 20 are gathered becomes the voltage sample signal to be delivered to ECU100, and ECU100 determines to carry out oil spout program or jet program with the variation of voltage sample signal, and switches by opening.
ECU100 produces the ignition timing signal according to ignition advance angle, under the control of the ignition timing signal ECU10 that generates by ECU100, the mixed gas in the firing chamber is lighted in spark plug 11 operations, cooling-water temperature sensor 17 is gathered the engine cooling water temperature sample signal, be the engine temperature sample signal, concurrent this signal of sample presentation is to ECU17.This signal of the concurrent sample presentation of crankshaft position sensor 15 collecting crankshaft signals is to ECU15, and ECU revises igniting and oil spout or jet pulsewidth according to the working state of signal judgement motor.This signal of the concurrent sample presentation of detonation sensor 14 collecting crankshaft signals is to this signal of the concurrent sample presentation of ECU14 to ECU14, ECU is according to the knocking state of detonation sensor sample signal ECU14 detection of engine, the control motor makes mixture combustion reach the optimum state to the borderline knock point.
Intake temperature and pressure transducer 12 detect the flow mass of air inlet.Concurrent this signal of sample presentation is to ECU12, and ECU judges motor load condition at that time according to the flow and the quality of air inlet.The information whether the exhaust oxygen after the preceding lambda sensor 19 in being installed on outlet pipe 130 is used for measuring engine combustion is superfluous, it is oxygen content, and oxygen content is converted to the voltage sample signal be delivered to ECU, it is the closed loop control of target that motor can be realized with the excess air factor; Guarantee that hydrocarbon (HC), carbon monoxide (CO) and three kinds of pollutants of oxynitrides (NOX) in 140 pairs of exhausts of three-way catalytic converter all have maximum transformation efficiency, conversion that farthest discharges pollutants and purification.Detect oxygen content once more by post oxygen sensor 20, and sample signal is sent to ECU, more effective air fuel ratio is controlled at 14.7:1, make tail gas reach more maximum discharge standard.
Present embodiment oil spout or jet control algorithm all are based on ECU 100 same set of hardware in the accompanying drawing 1, control algorithm is that ECU calculates actual fuel injection (jet) amount and actual fuel injection (jet) time according to the working state of motor, in embodiment's controlling method, as accompanying drawing 2 and accompanying drawing 3.
Algorithm flow chart when carrying out the oil spout program for ECU as accompanying drawing 2, when switch places the oil spout position, software is carried out the jet part program, determine basic fuel injection amount 121 according to engine rotational speed signal and throttle opening, the correction factor 131 of LAMBDA adds 1 and is multiplied by basic fuel injection amount 121 and obtains a fuel injection quantity 122; Warming-up fuel injection quantity correction 133 adds that start-up course fuel injection quantity correction 134 obtains reduction value 139, if not in the next value 1 of 139 operating mode corrections, obtain a reduction value 123; Full load fuel injection quantity correction 135, catalyst overheating protection fuel injection quantity correction 136 are got wherein, and maximum value obtains reduction value 138; Judge again and select idling fuel injection quantity correction 137 to obtain reduction value 124; Reduction value 123 adds that reduction value 124 obtains reduction value 170; Be multiplied by catalyzer heating correction factor 132, time transformation ratio 140 obtains reduction value 125; Add that oil film correction 163 obtains basic fuel injection amount 126; Add that restarting fuel injection quantity correction 164 obtains basic fuel injection amount 127; Be multiplied by oil spout amount of interference 165 and obtain basic fuel injection amount 128; Add oil spout Dead Time 166 and obtain basic fuel injection amount 129.Obtain the actual fuel injection time 130 at last.
Algorithm flow chart when carrying out jet program as accompanying drawing 3 for ECU, when switch placed jet position, software was carried out the jet part program.Determine jet substantially amount 141 according to engine rotational speed signal and throttle opening, the correction factor 143 of LAMBDA adds 1 and is multiplied by jet substantially amount 141 and obtains a fuel injection quantity 142; The jet amount correction 145 of warming-up is if not in the next value 1 of 145 operating modes, obtain reduction value 151; The jet amount correction 147 of full load, catalyst overheating protect jet amount correction 148 to get wherein, and maximum value obtains reduction value 150; Judge again and select idling fuel injection quantity correction 149 to obtain reduction value 152; Reduction value 151 adds that reduction value 152 obtains reduction value 171; Be multiplied by catalyst converter heating coefficient 144, time transformation ratio 146 obtains jet substantially amount 153; Be multiplied by a jet amount of interference 160 again and obtain jet substantially amount 146; Add that a jet Dead Time 161 obtains jet substantially amount 155; Obtain an actual jet time at last.
Wherein be used for determining the parameter-throttle opening of basic fuel injection amount, the present embodiment throttle opening is to utilize electronic throttle to control based on moment of torsion, ECU (Electrical Control Unit) computing engines moment of torsion, friction torque and inertia torque obtain an engine output torque (flywheel output torque) according to the interaction of these three moments of torsion.These torque values can be used to control algorithms such as tractive force control, braking torque processing, the processing of gear shift moment of torsion, idle speed control, axletree torque protection and air-conditioning torque compensation.Inertia torque is determined by the accekeration (adding/slow down) of engine, the interaction relationship (offsetting or increase) that quickens and slow down and determine inertia torque and engine torque; Friction torque is determined by engine speed and load, oil temperature, engine low-temperature working state, air condition compressor state etc.; Engine torque is by air mass flow, ignition advance angle and the decision of fuel oil state.These torque values are used in each control algorithm, realize change, compensation and the correction of moment of torsion by the adjustment of electronic throttle and ignition advance angle, to reach the purpose of exporting optimum moment of torsion in all cases, it can be according to driver's intention, when throttle was operated, ECU can gather the throttle control calculated signals by the I/O mouth and go out the aperture size that at that time Maximum Torque is controlled closure.To realize adding the smooth transition of downshift.
In the present invention, motor is taked closed loop control under the control of oil gas mixing ECU, and same algorithm is used in combustion gas control and fuel oil control, switches by switch, realizes that oil gas mixes the seamless combination of control; By collection, oil spout (jet) amount and firing angle are accurately controlled, thereby greatly improved engine performance intake temperature pressure, water temperature, engine speed, throttle position, oxygen sensor signal; By the air fuel ratio closed loop control, can obtain the optimal air-fuel ratio under the various operating modes simultaneously, realize that the control discharging reaches EUROIII Emission Standard, has tangible performance boost than traditional mixture control scheme;
The control of engine oil gas mixing ECU of the present invention keeps making automobile reach best power performance when being Maximum Torque control constantly; Make cylinder fuel combustion abundant, reduce the harmful gas in putting.
Though the present invention specifically illustrates and illustrates in conjunction with a preferred embodiment; but the personnel that are familiar with this technical field are appreciated that; wherein no matter still can make various changes in detail in form, this does not deviate from spirit of the present invention and scope of patent protection.
Claims (7)
1, a kind of controlling method of engine oil gas mixing ECU is characterized in that, this method may further comprise the steps:
S1: the flow and the quality that detect air inlet by the suction pressure temperature transducer;
Gather engine temperature signal by cooling-water temperature sensor;
Gather the engine crankshaft tach signal by crankshaft position sensor;
Knocking state by the detonation sensor detection of engine;
Gather the throttle opening signal by throttle position sensor;
Gather the oxygen content signal by preceding lambda sensor and post oxygen sensor;
S2:ECU is that benchmark is determined ignition advance angle, oil spout or jet timing with the engine crankshaft tach signal of crankshaft position sensor collection;
S3: become the voltage sample signal to be delivered to ECU the oxygen content signal conversion of preceding lambda sensor and post oxygen sensor collection, ECU adjusts the excess air factor value at any time with the variation of voltage sample signal, carries out oil spout or jet program;
S4:ECU produces the ignition timing signal according to ignition advance angle, under the control of ignition timing signal, and the mixed gas in the spark ignitor firing chamber, ECU revises igniting and oil spout or jet pulse with the engine temperature signal of cooling-water temperature sensor collection;
S5: mixture combustion is after the outlet pipe discharge, pass through preceding lambda sensor, three-way catalytic converter and the post oxygen sensor of outlet pipe afterbody successively, ECU realizes with the excess air factor being the closed loop control of target according to the oxygen content signal of preceding lambda sensor collection, after exhaust transforms through triple mode catalytic converter, the oxygen content SC sigmal control air fuel ratio that ECU gathers according to post oxygen sensor;
In step S3, the oil spout program is calculated actual fuel injection amount and actual fuel injection time, calculates actual jet amount with jet program and actual jet time uses same set of computational methods and two cover nominal datas, and the realization of algorithm is based on same set of hardware platform.
2, the controlling method of a kind of engine oil gas mixing ECU as claimed in claim 1 is characterized in that, in step S3, and when ECU carries out oil spout program or jet program, oil spout or jet multiple spot grouping or the multi-point sequent technology of all adopting.
3, the controlling method of a kind of engine oil gas mixing ECU as claimed in claim 1, it is characterized in that, in step S4, behind the mixed gas in the spark ignitor firing chamber, the knocking state of detonation sensor detection of engine, concurrent this signal of sample presentation is to ECU, and ECU controls motor to the borderline knock state according to sample signal.
4, the controlling method of a kind of engine oil gas mixing ECU as claimed in claim 1, it is characterized in that, correction obtains actual fuel injection amount, actual fuel injection time to the oil spout program that ECU carries out to basic fuel injection amount, and the jet program that ECU carries out obtains actual jet amount, actual jet time to jet substantially amount correction.
5, the controlling method of a kind of engine oil gas mixing ECU as claimed in claim 4, it is characterized in that basic fuel injection amount and jet substantially amount are determined according to the engine crankshaft tach signal of crankshaft position sensor collection and the throttle opening signal of throttle position sensor collection by ECU.
6, the controlling method of a kind of engine oil gas mixing ECU as claimed in claim 4 is characterized in that, the oil spout program that ECU carries out is to the basic fuel injection amount correction, or the reduction value that jet program is used during to jet substantially amount correction comprises:
A) excess air factor correction coefficient during engine operation;
B) the jet or fuel injection quantity correction of warming-up during engine start;
C) idling oil spout or jet amount correction during engine retard;
D) ECU judges motor load condition at that time, full load oil spout under the full engine load situation or jet reduction value according to flow and quality that the suction pressure temperature transducer detects air inlet;
E) catalyzer heating correction factor and the jet or oil spout reduction value of catalyst overheating protection when the three-way catalytic converter work of outlet pipe afterbody;
Oil spout or jet amount of interference when F) carrying out oil spout or jet program;
Oil spout or jet Dead Time when G) carrying out oil spout or jet program.
7, a kind of engine oil gas mixing ECU controlling method as claimed in claim 5, it is characterized in that, described throttle opening is to utilize electronic throttle to control based on moment of torsion, by ECU computing engines moment of torsion, friction moment of torsion and inertia torque, obtain an engine output torque according to the interaction of these three moments of torsion.
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| CNB2007101186493A CN100526629C (en) | 2007-07-11 | 2007-07-11 | Engine oil gas mixing ECU control method |
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| CNB2007101186493A CN100526629C (en) | 2007-07-11 | 2007-07-11 | Engine oil gas mixing ECU control method |
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| CN100526629C true CN100526629C (en) | 2009-08-12 |
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| CN111042933A (en) * | 2019-12-23 | 2020-04-21 | 天津布尔科技有限公司 | Intelligent control system for light unmanned aerial vehicle engine and implementation method thereof |
| CN111122768A (en) * | 2020-01-14 | 2020-05-08 | 攀钢集团攀枝花钢铁研究院有限公司 | Ladle baking air-fuel ratio configuration method |
| WO2021163863A1 (en) * | 2020-02-18 | 2021-08-26 | 潍柴动力股份有限公司 | Engine control method and device |
| CN116877237A (en) * | 2023-06-29 | 2023-10-13 | 东风商用车有限公司 | Three-way catalyst temperature and overheat protection method and device, electronic equipment and vehicle |
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