CN109899164A - Engine power control method, system and vehicle based on car load judgement - Google Patents
Engine power control method, system and vehicle based on car load judgement Download PDFInfo
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Abstract
The present invention relates to engine power control technologies, are based particularly on engine power control method, system and the vehicle of car load judgement.The control system includes control module, engine and sensor group, and sensor group includes vehicle speed sensor, engine torque sensor, gear detection sensor, base ratio sensor and vehicle acceleration sensor；Subtract information and acceleration information by sensor group acquisition vehicle speed information, engine torque information, gear information, master, and according to calibration information, calculate real-time load, and engine is controlled according to real-time load and carries out power output, power is able to achieve with the timely adjustment of load change, when avoiding the occurrence of load and becoming larger, power output is lower, cause the problem that dynamic property is on the weak side, it ensure that dynamic vehicle force and safety, solve the problems, such as to increase load transducer, angular transducer to determine that integral vehicle cost caused by car load state increases.
Description
Technical field
The present invention relates to engine power control technologies, are based particularly on the engine power controlling party of car load judgement
Method, system and vehicle.
Background technique
With the continuous improvement of economic fast development and living standards of the people, China's car ownership constantly increases, often
Year to consume a large amount of energy, while can also discharge a large amount of atmosphere pollution when automobilism, energy-saving and emission-reduction oneself become China
Solve the major measure that the energy restricts and curbs environmental pollution.To respond energy-saving and emission-reduction, each automobile manufacture commercial city is actively being ground
Hair oil consumes optimization method.
Currently, car is when carrying out vehicle power matching, often the demand with vehicle full load to dynamic property is carried out
Match, to adapt to the various applying working conditions of client, but this will go wrong, and when car load changes, engine is not
The case where with good grounds vehicle real load carries out output power adjustment, and vehicle just will appear excess drive force at this time, excess drive force meeting
Cause oil consumption to increase, causes energy waste.
The patent document that Chinese patent notification number is CN104343552A disclose a kind of engine power control system and
Method, system include: load transducer, for detecting the load of the vehicle；Angular transducer, for detecting the fortune of the vehicle
Dynamic state；ECU, for the power according to the load and motion state adjustment engine.Pass through load transducer autonomous classification
Car load, and according to car load state, select corresponding power grade curve to be controlled by Engine ECU.It is insufficient
Place has: (1) needing to increase load transducer, angular transducer to determine that car load state, integral vehicle cost increase；(2) only
Car load is divided into 4 kinds of modes such as unloaded, underloading, middle load and heavy duty, division is relatively simple rough, and power control is more thick
It puts, can not achieve the precise controlling of power.
Summary of the invention
The object of the present invention is to provide the engine power control method judged based on car load, system and vehicles, use
Determine that integral vehicle cost caused by car load state increases to solve the problems, such as to increase load transducer, angular transducer.
To achieve the above object, the present invention provides a kind of engine power control method based on car load judgement, packet
Include following methods technical solution:
Method scheme one: a kind of engine power control method based on car load judgement, steps are as follows:
1) information of vehicles and calibration information are obtained, wherein the information of vehicles includes vehicle speed information, engine torque letter
Breath, gear information, base ratio information and vehicle acceleration information；The calibration information includes tire radius information, windward side
Product information, air resistance coefficient information, drive line efficiency information, coefficient of rolling resistance information and correction coefficient of rotating mass information；
2) the real-time load of vehicle is calculated according to the information of vehicles and calibration information；
3) power output is carried out according to the real-time load control engine.
Beneficial effect is, this method scheme one calculates real-time load by obtaining information of vehicles and calibration information, and according to
The function of setting and real-time load determine the output power that engine needs to export, and are able to achieve power with the timely tune of load change
Whole, when avoiding the occurrence of load and becoming larger, power output is lower, causes the problem that dynamic property is on the weak side, ensure that dynamic vehicle force and peace
Quan Xing solves the problems, such as to need heavy workload, low efficiency caused by Experimental Calibration again when different vehicle load judges.
Method scheme two: on the basis of method scheme one, in the step 3), with unloaded mminWith fully loaded mmaxIt is upper and lower
Limit sets n load section from small to large, and the corresponding power threshold in each section determines institute according to obtained real-time load
The load section at place, the output power for controlling engine is power threshold corresponding to determining load section.
Method scheme three: on the basis of method scheme two, as unit of load section, load section is in power threshold
Positive correlation.
Method scheme four: on the basis of method scheme one, method scheme two or method scheme three, believed according to the vehicle
The formula that breath and calibration information calculate the real-time load is as follows:
Wherein, m is carload, T is engine torque, ikFor each gear ratios of gearbox, i0It is biography for base ratio, η
It is dynamic be efficiency, r be tire radius, C is air resistance coefficient, f is coefficient of rolling resistance, A is front face area, δ is vehicle gyrating mass
Conversion coefficient, α are vehicle acceleration, V is speed.
The present invention provides a kind of engine power control system based on car load judgement, including following systems technology side
Case:
System schema one: a kind of engine power control system based on car load judgement, including control module and hair
Motivation further includes sensor group, and the sensor group includes vehicle speed sensor, engine torque sensor, gear detection sensing
Device, base ratio sensor and vehicle acceleration sensor；The output end of the sensor group connects the control module, described
The control signal output of control module connects the engine.
System schema two: on the basis of system schema one, the sensor group connects the control mould by CAN bus
Block.
System schema three: on the basis of system schema one or system schema two, the control module is entire car controller.
The present invention provides a kind of vehicle, including following vehicle technology scheme:
Vehicle scheme one: a kind of vehicle, including control module and engine, which is characterized in that further include sensor group, institute
Stating sensor group includes vehicle speed sensor, engine torque sensor, gear detection sensor, base ratio sensor and vehicle
Acceleration transducer；The output end of the sensor group connects the control module, the control signal output of the control module
End connects the engine.
Vehicle scheme two: on the basis of vehicle scheme one, the sensor group connects the control mould by CAN bus
Block.
Vehicle scheme three: on the basis of vehicle scheme one or vehicle scheme two, the control module is entire car controller.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of engine power control system based on car load judgement；
Fig. 2 is a kind of flow chart schematic diagram of engine power control method based on car load judgement；
Fig. 3 is the comparative diagram of car load and engine power.
Specific embodiment
The present invention will be further described in detail with reference to the accompanying drawing.
The present invention provides a kind of engine power control system based on car load judgement, as shown in Figure 1, including control
Module, engine and sensor group, wherein sensor group includes vehicle speed sensor, engine torque sensor, gear detection biography
Sensor, base ratio sensor and vehicle acceleration sensor；The output end link control module of sensor group, control module
Control signal output connect engine, this control system be used for implement it is provided by the invention it is a kind of based on car load judgement
Engine power control method, as shown in Fig. 2, detailed process is as follows:
1, information of vehicles and calibration information are obtained.
Information of vehicles includes vehicle speed information, engine torque information, gear information, base ratio information and acceleration letter
Breath；Calibration information includes tire radius information, front face area information, air resistance coefficient information, gearing factor information, rolling resistance system
Number information and correction coefficient of rotating mass information；
Wherein, the related data for obtaining car operation in real time by corresponding sensor, such as speed, engine speed, hair
Motivation torque, gear, base ratio, acceleration etc., and calibration information acquisition module passes through the process simulation calculation demarcated in advance
Analysis or test obtain vehicle vehicle parameter information, as tire radius information, front face area information, air resistance coefficient information,
Drive line efficiency information, coefficient of rolling resistance information, correction coefficient of rotating mass information etc..
2, the real-time load of vehicle is calculated according to the information of vehicles and calibration information.
It is real to calculate vehicle by the calibration information for obtaining the information of sensor group acquisition in real time and being previously stored for control module
Shi Zaihe.Wherein preferred control module is entire car controller or engine controller.
Wherein, the calculation method of real-time load is as follows:
The method that car load calculates is based primarily upon the equilibrium equation of driving force and resistance, and when running car, driving force
With running resistance be balance, running resistance accordingly be respectively rolling resistance, air drag, gradient resistance and acceleration resistance,
Its equilibrium equation are as follows:
Wherein, T is engine torque (N.m), ikFor each gear ratios of gearbox, i0It is power train effect for base ratio, η
Rate, r are tire radius, m is carload (kg), C is air resistance coefficient, f is coefficient of rolling resistance, i is road grade, A is to meet
Wind area, δ vehicle correction coefficient of rotating mass, a are vehicle acceleration, V is speed.
When vehicle is climbed, vehicle acceleration travels phase with the flat road surface in same torque, identical gear, identical speed
Than, due to the presence of gradient i, a part of vehicle drive force is used to overcome gradient resistance, the driving force reduction for using to accelerate,
Cause acceleration to reduce, in order to simplify calculate, such case we can be defaulted as vehicle climbing situation and vehicle on flat road
The case where face load increases is equivalent, the influence of gradient i is shielded in formula, equivalent conversion is at the increase of carload, therefore formula can
Simplify are as follows:
Carload calculation formula is as follows:
From the above analysis, the load m obtained by carload calculation formula, the load feelings including vehicle climbing
Therefore condition judges loaded-up condition by carload calculation formula, and carry out engine output work according to the loaded-up condition of judgement
Rate control, is able to satisfy vehicle dynamic property demand.
3, output power is obtained according to the real-time load and controls engine and carry out power output.
According to the control strategy formulated in advance in entire car controller or engine controller, believed by above-mentioned real-time load
Breath, control make to have started the corresponding power of output.
It is preferred that control strategy, vehicle is fully loaded with for mmax, it is unloaded be mmin, several load are provided between zero load fully loaded
Range is specific by [mmin, mmax] it is divided into several load ranges, respectively [mmin, m1]、(m1, m2]、(m2, m3]、……、
(mn-1, mn]、(mn+1, mmax], wherein mminWeight when for vehicle zero load, mmaxFor the weight of vehicle full load, m1、m2、……、
mnIt is the different weight of setting, two adjacent setting weights constitute a load range Mn ((mn-1, mn]), the range being divided into
Number, i.e. the number of n can be set according to the actual situation, when n is smaller, that is, when the number for the range being divided into is less,
The length of each quantitative range is longer, and control is more extensive, when n is larger, that is, when the number for the range being divided into is more, correspondingly,
The length of each quantitative range is shorter, controls finer.In principle, the minimum value of n is 2, reaches certain fine to control
Degree, the minimum value of n is 4,5,6 or 7 under normal circumstances, certainly, if it is desired to be more finely controlled, n can be more
Big number.LOAD FOR module obtains vehicle current load m, if current load m is fallen in by carload computational algorithm
State a certain load range Mn ((mn-1, mn]), then this load range Mn is vehicle current load state, particularly, when being calculated
Current load be less than mminWhen, loaded-up condition is M1 to default at this time, when the current load being calculated is greater than mmaxWhen, default this
When loaded-up condition be Mmax。
Entire car controller or engine controller control engine and export corresponding power, hair according to the real-time load of vehicle
The relationship that the power output of motivation is adapted based on load, i.e. engine power reduce with the reduction of load, increase and increase
Big basic ideas, each load range Mn are corresponding with the power given value Pn of different engines, entire car controller according to
Determining loaded-up condition exports corresponding engine power given value to control engine, makes it according to corresponding power given value
To run.
It being described in detail in conjunction with the above-mentioned load range provided, as shown in Figure 3, wherein abscissa represents load range,
Ordinate represents power given value, and load range and engine power given value corresponding relationship are as follows: (0, mmin] and (mmin, m1]
Corresponding power given value is P1, (m1, m2] corresponding power given value is P2, (m2, m3] corresponding power given value is
P3... ..., (mn-1, mn] corresponding power given value is Pn, (mn, mmax] and (mmax, ∞) and corresponding power given value is Pmax,
Wherein, P1< P2< P3... < Pn< Pmax, PmaxFor maximum power, by above-mentioned setting, power given value and vehicle
Whole relation between load is that ladder-like increase is presented in power given value as the load increases, as the reduction of load is presented
Ladder-like reduction.
Above-mentioned parameter, such as m1、m2、mn、P1、P2、Pn, it is not a definite value, size can be dynamic according to different automobile types, difference
Power configuration, is realized by calibration.
Specific embodiment of the present invention is presented above, but the present invention is not limited to described embodiment.
Under the thinking that the present invention provides, to the skill in above-described embodiment by the way of being readily apparent that those skilled in the art
Art means are converted, are replaced, are modified, and play the role of with the present invention in relevant art means it is essentially identical, realize
Goal of the invention it is also essentially identical, the technical solution formed in this way is to be finely adjusted to be formed to above-described embodiment, this technology
Scheme is still fallen in protection scope of the present invention.
Claims (10)
1. the engine power control method based on car load judgement, which is characterized in that steps are as follows:
1) information of vehicles and calibration information are obtained, wherein the information of vehicles includes vehicle speed information, engine torque information, shelves
Position information, base ratio information and vehicle acceleration information；The calibration information includes tire radius information, front face area letter
Breath, air resistance coefficient information, drive line efficiency information, coefficient of rolling resistance information and correction coefficient of rotating mass information；
2) the real-time load of vehicle is calculated according to the information of vehicles and calibration information；
3) power output is carried out according to the real-time load control engine.
2. the engine power control method according to claim 1 based on car load judgement, which is characterized in that described
In step 3), with unloaded mminWith fully loaded mmaxSet n load section from small to large for bound, each section is one corresponding
Power threshold determines locating load section according to obtained real-time load, and the output power for controlling engine is determining load
Power threshold corresponding to lotus section.
3. the engine power control method according to claim 2 based on car load judgement, which is characterized in that carry
Lotus section is unit, load section and power threshold correlation.
4. the engine power control method according to claim 1,2 or 3 based on car load judgement, feature exist
In the formula of the real-time load is as follows:
Wherein, m is carload, T is engine torque, ikFor each gear ratios of gearbox, i0It is power train for base ratio, η
Efficiency, r are tire radius, C is air resistance coefficient, f is coefficient of rolling resistance, A is front face area, δ is the conversion of vehicle gyrating mass
Coefficient, α are vehicle acceleration, V is speed.
5. a kind of implement carrying based on vehicle for the engine power control method described in claim 1 based on car load judgement
The engine power control system of lotus judgement, including control module and engine, which is characterized in that further include sensor group, institute
Stating sensor group includes vehicle speed sensor, engine torque sensor, gear detection sensor, base ratio sensor and vehicle
Acceleration transducer；The output end of the sensor group connects the control module, the control signal output of the control module
End connects the engine.
6. the engine power control system according to claim 5 based on car load judgement, which is characterized in that described
Sensor group connects the control module by CAN bus.
7. the engine power control system according to claim 5 or 6 based on car load judgement, which is characterized in that
The control module is entire car controller.
8. a kind of vehicle for implementing the engine power control method described in claim 1 based on car load judgement, including
Control module and engine, which is characterized in that further include sensor group, the sensor group includes vehicle speed sensor, engine
Torque sensor, gear detection sensor, base ratio sensor and vehicle acceleration sensor；The output of the sensor group
End connects the control module, and the control signal output of the control module connects the engine.
9. vehicle according to claim 8, which is characterized in that the sensor group connects the control by CAN bus
Module.
10. vehicle according to claim 8 or claim 9, which is characterized in that the control module is entire car controller.
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| CN110901414A (en) * | 2019-12-16 | 2020-03-24 | 潍柴动力股份有限公司 | Vehicle torque control method, device and equipment |
| CN111775717A (en) * | 2020-06-29 | 2020-10-16 | 湖南智点智能新能源汽车有限公司 | Vehicle motor operation parameter determination method and device and vehicle |
| CN112092646A (en) * | 2020-08-18 | 2020-12-18 | 北汽福田汽车股份有限公司 | Vehicle control method and device, storage medium and vehicle |
| CN113147396A (en) * | 2021-05-13 | 2021-07-23 | 潍柴动力股份有限公司 | Vehicle speed control method and device |
| CN113593079A (en) * | 2021-07-30 | 2021-11-02 | 东风商用车有限公司 | Road condition self-adaption method, device, equipment and readable storage medium |
| CN114312806A (en) * | 2020-09-30 | 2022-04-12 | 陕西汽车集团有限责任公司 | Method for judging vehicle load state |
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