CN108162972B - Method and device for determining air intake impulse and hybrid electric vehicle - Google Patents
Method and device for determining air intake impulse and hybrid electric vehicle Download PDFInfo
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- CN108162972B CN108162972B CN201711484301.6A CN201711484301A CN108162972B CN 108162972 B CN108162972 B CN 108162972B CN 201711484301 A CN201711484301 A CN 201711484301A CN 108162972 B CN108162972 B CN 108162972B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
Abstract
The embodiment of the invention discloses a method and a device for determining air intake impulse, wherein the method comprises the following steps: measuring the actual air intake impulse of the engine under the preset output power by using the generator; correcting the corresponding relation between the required torque and the intake impulse or the corresponding relation between the opening of the accelerator and the rotating speed and the required torque according to the preset output power and the actual intake impulse; when the hybrid electric vehicle is driven by the engine, the air inlet impulse required by the engine is determined according to the corrected corresponding relation, the engine thermal load caused by the change of the fuel calorific value can be avoided from being abnormal, the stable operation of the engine is facilitated, the service life of the engine is prolonged, and the stability and the safety of the operation of the hybrid electric vehicle are improved.
Description
Technical Field
The invention relates to the technical field of hybrid electric vehicles, in particular to a method and a device for determining air intake impulse and a hybrid electric vehicle.
Background
In the normal running process of the automobile, because the quality of the fuel added each time, such as gasoline or natural gas, is uneven, and the power generated by fuel combustion is different, the power provided for the automobile under the same working condition and air intake impulse is different, the normal and stable running of the automobile is influenced, seriously, the heat load of the engine is abnormal, the engine knocks, and the engine is damaged.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a method and a device for determining intake impulse and a hybrid electric vehicle, which can solve the problem of abnormal engine thermal load caused by incapability of determining the calorific value generated by fuel combustion in the prior art and stabilize the output power of an engine.
The embodiment of the invention provides an air intake impulse determining method, which is applied to a hybrid electric vehicle, wherein the hybrid electric vehicle comprises: an engine and a generator; the method comprises the following steps:
measuring the actual air intake impulse of the engine under a preset output power by using the generator;
correcting a first corresponding relation according to the preset output power and the actual air intake impulse; the first corresponding relation is a corresponding relation between a required torque and an intake impulse, or the first corresponding relation is a corresponding relation between a throttle opening and a required torque and an engine rotating speed;
and when the hybrid electric vehicle is driven by the engine, determining the air intake impulse required by the engine according to the corrected first corresponding relation.
Optionally, the measuring, by using the generator, an actual intake impulse of the engine under a preset output power specifically includes:
controlling the engine to drive a motor in the generator to act;
detecting the running state of the motor;
and when the motor is detected to operate in a state corresponding to the preset output power, acquiring the air intake impulse of the engine to obtain the actual air intake impulse.
Optionally, the correcting the first corresponding relationship according to the preset output power and the actual intake impulse specifically includes:
determining a first correction coefficient according to the preset output power, the actual air intake impulse and a second corresponding relation; the second corresponding relation is a corresponding relation between the output power and the air intake impulse;
obtaining a second correction coefficient according to the first correction coefficient and a preset conversion curve;
and correcting the first corresponding relation according to the second correction coefficient.
Optionally, the measuring, by using the generator, an actual intake impulse of the engine at a preset output power further includes:
detecting the fuel quantity filled by the hybrid electric vehicle;
and when the fuel quantity of the hybrid electric vehicle is detected to be increased, the step of measuring the actual air intake impulse of the engine at the preset output power by using the generator is executed.
Alternatively to this, the first and second parts may,
when the first corresponding relationship is a corresponding relationship between the required torque and the intake impulse, determining the intake impulse required by the engine according to the corrected corresponding relationship, specifically comprising:
determining the current required torque according to the current accelerator opening and the engine rotating speed;
determining the intake impulse corresponding to the current required output power according to the corrected first corresponding relation to obtain the intake impulse required by the engine;
when the first corresponding relationship is a corresponding relationship between the throttle opening and the engine speed and the required torque, determining the intake impulse required by the engine according to the corrected corresponding relationship, specifically comprising:
obtaining the current required torque according to the current accelerator opening, the engine speed and the corrected first corresponding relation;
and determining the intake impulse corresponding to the current required torque according to the preset corresponding relation between the required torque and the intake impulse to obtain the intake impulse required by the engine.
The embodiment of the invention provides an air intake impulse determining device, which is applied to a hybrid electric vehicle, wherein the hybrid electric vehicle comprises: an engine and a generator; the apparatus, comprising: the device comprises a measuring module, a correcting module and a determining module;
the measuring module is used for measuring the actual air intake impulse of the engine under the preset output power by using the generator;
the correction module is used for correcting the first corresponding relation according to the preset output power and the actual air inlet impulse; the first corresponding relation is a corresponding relation between a required torque and an intake impulse, or the first corresponding relation is a corresponding relation between a throttle opening and a required torque and an engine rotating speed;
and the determining module is used for determining the air intake impulse required by the engine according to the corrected corresponding relation when the engine is used for driving the hybrid electric vehicle.
Optionally, the measurement module specifically includes: the control submodule, the detection submodule and the acquisition submodule are connected;
the control submodule is used for controlling the engine to drive a motor in the generator to act;
the detection submodule is used for detecting the running state of the motor;
and the acquisition submodule is used for acquiring the air intake impulse of the engine to obtain the actual air intake impulse when the detection submodule detects that the motor operates in a state corresponding to the preset output power.
Optionally, the modification module is specifically configured to:
determining a first correction coefficient according to the preset output power, the actual air intake impulse and a second corresponding relation; the second corresponding relation is a corresponding relation between the output power and the air intake impulse;
obtaining a second correction coefficient according to the first correction coefficient and a preset conversion curve;
and correcting the first corresponding relation according to the second correction coefficient.
Optionally, the apparatus further includes: the fuel detection module and the trigger module;
the fuel detection module is used for detecting the fuel quantity filled by the hybrid electric vehicle;
the triggering module is used for triggering the measuring module to execute the measurement by using the generator to measure the actual air intake impulse of the engine under the preset output power when the fuel detection module detects that the fuel quantity of the hybrid electric vehicle is increased.
Optionally, when the first corresponding relationship is a corresponding relationship between a required torque and an intake air impulse, the determining module is specifically configured to:
determining the current required torque according to the current accelerator opening and the engine rotating speed;
and determining the intake impulse corresponding to the current required output power according to the corrected first corresponding relation to obtain the intake impulse required by the engine.
When the first correspondence is a correspondence between throttle opening and engine speed and required torque, the determination module is specifically configured to:
obtaining the current required torque according to the current accelerator opening, the engine rotating speed and the corrected first corresponding relation;
and determining the intake impulse corresponding to the current required torque according to the preset corresponding relation between the required torque and the intake impulse to obtain the intake impulse required by the engine.
An embodiment of the present invention further provides a controller, including: a memory and a processor;
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to call the program code in the memory to execute the intake charge determination method according to the above embodiment.
The embodiment of the invention also provides a hybrid electric vehicle which comprises the controller in the embodiment.
Compared with the prior art, the invention has at least the following advantages:
in the embodiment of the invention, the generator of the hybrid electric vehicle is utilized to detect the actual air intake impulse of the engine under certain output power so as to determine the power which can be provided by the current fuel filling. And then, the corresponding relation between the required torque and the intake impulse or the corresponding relation between the opening of the accelerator and the rotating speed and the required torque is corrected according to the output power and the actual intake impulse, so that when the engine is used for driving, the current intake impulse of the engine is determined according to the corrected corresponding relation, the abnormal heat load of the engine caused by the change of the heat value of the fuel is avoided, the stable running of the engine is facilitated, the service life of the engine is prolonged, and the running stability and the running safety of the hybrid electric vehicle are improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic flow chart of a method for determining an intake charge according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart diagram of another method for determining an intake charge in accordance with an embodiment of the present invention;
FIG. 3 is a schematic flow chart of another method for determining an intake air charge according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an intake impulse determining apparatus according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another intake impulse determining apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
First, it should be noted that the intake impulse determining method and apparatus provided by the embodiment of the present invention are applied to a hybrid vehicle. The hybrid vehicle may be a gasoline and electric hybrid vehicle (i.e., a gasoline-electric hybrid vehicle) or a natural gas and electric hybrid vehicle (i.e., a gas-electric hybrid vehicle). The hybrid electric vehicle is driven by an engine and a generator, and the structure of the hybrid electric vehicle can be non-parallel or parallel. The engine provides power for the hybrid electric vehicle by burning gasoline or natural gas, and the generator generates electricity by using the motor to provide power and motive power for the hybrid electric vehicle.
Because the heat value of the gasoline or the natural gas combusted in the automobile is not fixed when the gasoline or the natural gas is added to the hybrid electric vehicle every time, and the heat value of the gasoline or the natural gas is irrelevant to the air quantity consumed by the gasoline or the natural gas, under the same air inlet impulse, the different heat values of the gasoline or the natural gas can cause different actual power provided by the engine for the automobile. The lower heat value can cause insufficient power provided by the engine and influence the stable operation of the hybrid electric vehicle; and the heat value is too high, so that the danger that the heat load of the engine is too high exists, the engine is damaged, and the service life of the engine is influenced.
Therefore, the embodiment of the invention provides an intake impulse determining method and device, which utilize a generator to measure the intake impulse of a current engine under the condition of certain output power, determine the actual corresponding relation between the output power of the engine and the intake impulse when the current fuel is combusted, and modify the corresponding relation between a required torque and the intake impulse or the corresponding relation between an accelerator opening and the engine speed and the required torque by utilizing the corresponding relation set in factory shipment. When the engine is used for driving the automobile to act, the intake impulse actually required by the engine is determined by using the corrected corresponding relation, so that the output power of the engine is consistent with the expectation, accurate torque output is provided for the automobile, the stable operation of the engine and the automobile is ensured, and the service life of the engine is prolonged.
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying the drawings are described in detail below.
Referring to fig. 1, a schematic flow chart of an intake air impulse determination method according to an embodiment of the present invention is shown.
The method for determining the air intake impulse provided by the embodiment of the invention specifically comprises the following steps S101-S103.
S101: and measuring the actual air inlet impulse of the engine under the preset output power by using the generator.
It will be appreciated that the air charge is the ratio of the mass of air in the engine cylinder to the mass of air in the cylinder at room temperature, and represents the actual air charge of the engine and the mass of air provided for combustion of the fuel. By controlling the air inlet impulse of the engine, the running condition of the engine can be adjusted, and the power supplied by the engine is controlled.
In the embodiment of the invention, the controller of the hybrid electric vehicle can be used for controlling the engagement of the transmission system of the motor from the engine to the generator, controlling the engine to drive the motor to act at the preset rotating speed and torque, measuring the actual output power of the engine by using the motor, enabling the output power of the engine to be the preset output power, and measuring the air intake impulse of the engine at the moment to obtain the actual air intake impulse.
In some possible implementations, as shown in fig. 2, the step S101 may specifically include the following steps S1011 to S1013.
S1011: and controlling the motor in the engine-driven generator to act.
In practical application, when the hybrid electric vehicle is in a non-parallel structure, the generator can be controlled to generate power to drive the motor to act by controlling the engine to operate and enabling the engine not to participate in directly driving wheels to act. When the hybrid electric vehicle is in a parallel structure, when a driver presses a starting switch, the controller controls the transmission system from the engine to the motor to be meshed, and controls the transmitter to drive the motor to act.
S1012: the operating state of the motor is detected.
In the embodiment of the invention, the operation state of the motor includes the rotation speed of the motor and the torque of the motor, and the operation state of the motor reflects the output power of the engine. A person skilled in the art may specifically use the existing sensor device in the hybrid electric vehicle to detect the operation state of the motor, and the detection method of the operation state of the motor in the embodiment of the present invention is not particularly limited.
S1013: and when the motor is detected to operate in a state corresponding to the preset output power, acquiring the air intake impulse of the engine to obtain the actual air intake impulse.
In practical application, in order to facilitate subsequent correction of the corresponding relationship between the output power and the intake impulse, the actual intake impulse of the engine can be obtained by stabilizing the operating state of the engine during the production test, that is, stabilizing the states of the water temperature, the oil temperature, the ambient temperature and the intake temperature of the engine during the production test, and controlling the motor to operate at the rotating speed and the torque adopted during the delivery test of the output power, so as to determine the corresponding relationship between the output power and the intake impulse of the engine under the current condition.
S102: and correcting the first corresponding relation according to the preset output power and the actual air inlet impulse.
The first corresponding relation is the corresponding relation between the required torque and the intake impulse, or the first corresponding relation is the corresponding relation between the throttle opening and the engine speed and the required torque.
It should be noted that, in the normal working process of the engine, the current required torque of the engine is determined by using the preset corresponding relationship between the opening degree of the accelerator and the rotation speed of the engine and the required torque. And then, acquiring the intake impulse corresponding to the current required torque by utilizing the preset corresponding relation between the required torque and the intake impulse, and operating by using the intake impulse. Therefore, in the embodiment of the invention, in order to avoid the problems of engine knocking, service life reduction and the like, the heat value change of the automobile fuel is reflected laterally according to the actual intake impulse corresponding to the output power of the engine, and the corresponding relation between the required torque and the intake impulse or the corresponding relation between the accelerator opening degree and the engine speed and the required torque is corrected to adapt to the currently added fuel, so that the intake impulse capable of enabling the engine to stably run is obtained, the engine is protected, and the service life of the engine is prolonged.
In some possible implementations of the embodiment of the present invention, as shown in fig. 3, the step S102 may specifically include the following steps S1021 to S1023.
S1021: and determining a first correction coefficient according to the preset output power, the actual air intake impulse and the second corresponding relation.
Wherein, the second corresponding relation is the corresponding relation between the output power and the air inlet impulse.
In practical application, when an automobile leaves a factory, the corresponding relation between the output power of an engine and the air intake impulse is calibrated. Therefore, in the embodiment of the present invention, the corresponding relationship between the output power and the intake impulse calibrated at the time of factory shipment may be used as the second corresponding relationship, and the first correction coefficient may be determined according to the preset output power and the actual intake impulse. Specifically, a preset intake impulse corresponding to the preset output power in the second corresponding relationship is obtained, and a ratio of the preset intake impulse to the actual intake impulse is used as the first correction coefficient.
S1022: and obtaining a second correction coefficient according to the first correction coefficient and a preset conversion curve.
S1023: and correcting the first corresponding relation according to the second correction coefficient.
It is understood that the required torque of the engine also reflects the output power of the engine, but cannot be equated with the output power of the engine. Therefore, in the embodiment of the invention, the first correction coefficient is converted into the second correction coefficient for correcting the correspondence relationship between the required torque and the intake impulse by using the preset conversion curve. Similarly, the corresponding relationship between the accelerator opening and the engine speed and the required torque is not equal to the corresponding relationship between the output power and the intake impulse, and the corresponding relationship between the accelerator opening and the engine speed and the required torque needs to be corrected by converting the first correction coefficient into the second correction coefficient by using a preset conversion curve. The specific method for obtaining the preset conversion curve in the embodiment of the present invention is not specifically limited, and in practical applications, a person skilled in the art may calibrate the preset conversion curve according to actual conditions and experience, and details of the specific process are not described again.
In some possible implementation manners of the embodiment of the present invention, step S101 further includes the following steps before: detecting the fuel quantity filled by the hybrid electric vehicle; when an increase in the amount of fuel of the hybrid vehicle is detected, step S101 is executed.
It can be understood that, since the calorific value of the fuel in the engine is mainly caused by adding new fuel, the above steps S101 to S102 may be executed to correct the corresponding relationship between the output power and the intake air impulse after each new fuel or air charge is added to the hybrid vehicle, so as to ensure stable operation of the engine.
S103: and when the hybrid electric vehicle is driven by the engine, determining the air intake impulse required by the engine according to the corrected corresponding relation.
In some possible implementations of the embodiment of the present invention, when the first corresponding relationship is a corresponding relationship between a required torque and an intake air impulse, the step S101 may specifically include: determining the current required torque according to the current accelerator opening and the engine rotating speed; and determining the intake impulse corresponding to the required output power of the engine according to the corrected first corresponding relation to obtain the intake impulse required by the engine.
When the first corresponding relationship is a corresponding relationship between the throttle opening and the engine speed and the required torque, the step S101 may specifically include: obtaining the current required torque according to the current accelerator opening, the engine rotating speed and the corrected first corresponding relation; and determining the intake impulse corresponding to the current required torque according to the preset corresponding relation between the required torque and the intake impulse to obtain the intake impulse required by the engine.
In the embodiment of the invention, the generator of the hybrid electric vehicle is utilized to detect the actual air intake impulse of the engine under certain output power so as to determine the power which can be provided by the current fuel filling. And then, the corresponding relation between the required torque and the intake impulse or the corresponding relation between the opening of the accelerator and the rotating speed and the required torque is corrected according to the output power and the actual intake impulse, so that when the engine is used for driving, the current intake impulse of the engine is determined according to the corrected corresponding relation, the abnormal heat load of the engine caused by the change of the heat value of the fuel is avoided, the stable running of the engine is facilitated, the service life of the engine is prolonged, and the running stability and the running safety of the hybrid electric vehicle are improved.
Based on the intake impulse determination method provided by the embodiment, the embodiment of the invention also provides an intake impulse determination device.
Referring to fig. 4, the drawing is a schematic structural diagram of an intake air impulse determining apparatus according to an embodiment of the present invention.
The intake impulse determining device provided by the embodiment of the invention specifically comprises: a measurement module 100, a correction module 200 and a determination module 300;
the measuring module 100 is used for measuring the actual air intake impulse of the engine under the preset output power by using the generator.
The correction module 200 is configured to correct the first corresponding relationship according to a preset output power and an actual intake impulse; the first corresponding relationship is a corresponding relationship between a required torque and an intake impulse, or the first corresponding relationship is a corresponding relationship between a throttle opening and an engine speed and the required torque.
In some possible implementation manners of the embodiment of the present invention, the modification module 200 is specifically configured to: determining a first correction coefficient according to the preset output power, the actual air intake impulse and the second corresponding relation; the second corresponding relation is the corresponding relation between the output power and the air inlet impulse; obtaining a second correction coefficient according to the first correction coefficient and a preset conversion curve; and correcting the first corresponding relation according to the second correction coefficient.
The determining module 300 is configured to determine an intake impulse required by the engine according to the correspondence relationship corrected by the correcting module 200 when the hybrid vehicle is driven by the engine.
When the first correspondence relationship is a correspondence relationship between a required torque and an intake impulse, the determining module 300 is specifically configured to: determining the current required torque according to the current accelerator opening and the engine rotating speed; and determining the intake impulse corresponding to the current required output power according to the corrected first corresponding relation to obtain the intake impulse required by the engine.
When the first correspondence is a correspondence between throttle opening and engine speed versus torque demand, the determination module 300 is specifically configured to: obtaining the current required torque according to the current accelerator opening, the engine rotating speed and the corrected first corresponding relation; and determining the intake impulse corresponding to the current required torque according to the preset corresponding relation between the required torque and the intake impulse to obtain the intake impulse required by the engine.
In some possible implementation manners of the embodiment of the present invention, the apparatus further includes: the fuel detection module and the trigger module;
the fuel detection module is used for detecting the fuel quantity filled by the hybrid electric vehicle;
the triggering module is used for triggering the measuring module 100 to measure the actual air intake impulse of the engine under the preset output power by using the generator when the fuel detecting module detects that the fuel quantity of the hybrid electric vehicle is increased.
In some possible implementation manners of the embodiment of the present invention, as shown in fig. 5, the measurement module 100 may specifically include: a control submodule 101, a detection submodule 102 and an acquisition submodule 103;
the control submodule 101 is used for controlling the motor in the engine-driven generator to act;
the detection submodule 102 is used for detecting the running state of the motor;
and the obtaining submodule 103 is used for obtaining the air intake impulse of the engine when the detection submodule 102 detects that the motor operates in a state corresponding to the preset output power, so as to obtain the actual air intake impulse.
In the embodiment of the invention, the generator of the hybrid electric vehicle is utilized to detect the actual air intake impulse of the engine under certain output power so as to determine the power which can be provided by the current fuel filling. And then, the corresponding relation between the required torque and the intake impulse or the corresponding relation between the opening of the accelerator and the rotating speed and the required torque is corrected according to the output power and the actual intake impulse, so that when the engine is used for driving, the current intake impulse of the engine is determined according to the corrected corresponding relation, the abnormal heat load of the engine caused by the change of the heat value of the fuel is avoided, the stable running of the engine is facilitated, the service life of the engine is prolonged, and the running stability and the running safety of the hybrid electric vehicle are improved.
Based on the method and the device for determining the air intake impulse provided by the embodiment, the embodiment of the invention also provides a controller. The controller includes: a memory and a processor.
The memory is used for storing the program codes and transmitting the program codes to the processor; a processor for calling program code in the memory to execute the method for determining an intake charge as provided in the above embodiments.
Based on the method and the device for determining the air intake impulse provided by the embodiment, the embodiment of the invention also provides a hybrid electric vehicle which comprises the controller provided by the embodiment.
It should be noted that, in the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant part can be referred to the method part for description.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present teachings, or modify equivalent embodiments to equivalent variations, without departing from the scope of the present teachings, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.
Claims (10)
1. An intake impulse determination method, applied to a hybrid vehicle, the hybrid vehicle comprising: an engine and a motor; the method comprises the following steps:
measuring the actual air intake impulse of the engine under a preset output power by using the motor;
correcting a first corresponding relation according to the preset output power and the actual air intake impulse; the first corresponding relation is a corresponding relation between a required torque and an intake impulse, or the first corresponding relation is a corresponding relation between a throttle opening and a required torque and an engine rotating speed;
and when the hybrid electric vehicle is driven by the engine, determining the air intake impulse required by the engine according to the corrected first corresponding relation.
2. The method according to claim 1, wherein the measuring, by the electric machine, the actual intake impulse of the engine at a preset output power specifically comprises:
controlling the engine driving motor to act at a preset rotating speed and a preset torque;
detecting the running state of the motor;
and when the motor is detected to operate in a state corresponding to the preset output power, acquiring the air intake impulse of the engine to obtain the actual air intake impulse.
3. The method according to claim 1, wherein the modifying the first corresponding relationship according to the preset output power and the actual intake air impulse specifically comprises:
determining a first correction coefficient according to the preset output power, the actual air intake impulse and a second corresponding relation; the second corresponding relation is a corresponding relation between the output power and the air intake impulse;
obtaining a second correction coefficient according to the first correction coefficient and a preset conversion curve; the preset conversion curve is used for converting the first correction coefficient into a second correction coefficient for correcting the corresponding relation between the required torque and the intake impulse;
and correcting the first corresponding relation according to the second correction coefficient.
4. The method of any one of claims 1-3, wherein said measuring, with said electric machine, an actual charge of air at a preset output power of said engine further comprises:
detecting the fuel quantity filled by the hybrid electric vehicle;
and when the increase of the fuel quantity of the hybrid electric vehicle is detected, the step of measuring the actual air intake impulse of the engine at the preset output power by using the motor is executed.
5. The method according to any one of claims 1 to 3,
when the first corresponding relationship is a corresponding relationship between a required torque and an intake impulse, determining the intake impulse required by the engine according to the corrected first corresponding relationship, specifically comprising:
determining the current required torque according to the current accelerator opening and the engine rotating speed;
determining the intake impulse corresponding to the current required torque according to the corrected first corresponding relation to obtain the intake impulse required by the engine;
when the first corresponding relationship is a corresponding relationship between the throttle opening and the engine speed and the required torque, determining the intake impulse required by the engine according to the corrected corresponding relationship, specifically comprising:
obtaining the current required torque according to the current accelerator opening, the engine speed and the corrected first corresponding relation;
and determining the intake impulse corresponding to the current required torque according to the preset corresponding relation between the required torque and the intake impulse to obtain the intake impulse required by the engine.
6. An intake impulse determination device, applied to a hybrid vehicle, the hybrid vehicle comprising: an engine and a motor; the apparatus, comprising: the device comprises a measuring module, a correcting module and a determining module;
the measuring module is used for measuring the actual air intake impulse of the engine under the preset output power by using the motor;
the correction module is used for correcting the first corresponding relation according to the preset output power and the actual air inlet impulse; the first corresponding relation is a corresponding relation between a required torque and an intake impulse, or the first corresponding relation is a corresponding relation between a throttle opening and a required torque and an engine rotating speed;
and the determining module is used for determining the air intake impulse required by the engine according to the corrected corresponding relation when the engine is used for driving the hybrid electric vehicle.
7. The apparatus according to claim 6, wherein the measurement module specifically comprises: the control submodule, the detection submodule and the acquisition submodule are connected;
the control submodule is used for controlling the engine driving motor to act at a preset rotating speed and a preset torque;
the detection submodule is used for detecting the running state of the motor;
and the acquisition submodule is used for acquiring the air intake impulse of the engine to obtain the actual air intake impulse when the detection submodule detects that the motor operates in a state corresponding to the preset output power.
8. The apparatus of claim 6, wherein the modification module is specifically configured to:
determining a first correction coefficient according to the preset output power, the actual air intake impulse and a second corresponding relation; the second corresponding relation is a corresponding relation between the output power and the air intake impulse;
obtaining a second correction coefficient according to the first correction coefficient and a preset conversion curve; the preset conversion curve is used for converting the first correction coefficient into a second correction coefficient used for correcting the corresponding relation between the required torque and the intake impulse;
and correcting the first corresponding relation according to the second correction coefficient.
9. A controller for intake impulse determination, characterized by being applied to a hybrid vehicle, the hybrid vehicle comprising: an engine and a motor; the controller includes: a memory and a processor;
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor, configured to invoke the program code in the memory to perform the intake impulse determination method of any one of claims 1-4.
10. A hybrid vehicle characterized by comprising the controller according to claim 9.
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| CN201711484301.6A CN108162972B (en) | 2017-12-29 | 2017-12-29 | Method and device for determining air intake impulse and hybrid electric vehicle |
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| CN201711484301.6A CN108162972B (en) | 2017-12-29 | 2017-12-29 | Method and device for determining air intake impulse and hybrid electric vehicle |
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| CN108162972A CN108162972A (en) | 2018-06-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103101532A (en) * | 2012-11-15 | 2013-05-15 | 沈阳洪达信息科技有限公司 | Driving method for vehicle driving system |
| CN103935356A (en) * | 2013-01-17 | 2014-07-23 | 丰田自动车株式会社 | Hybrid vehicle control device and hybrid vehicle |
| CN105317576A (en) * | 2014-06-30 | 2016-02-10 | 丰田自动车株式会社 | Control apparatus for internal combustion engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103101532A (en) * | 2012-11-15 | 2013-05-15 | 沈阳洪达信息科技有限公司 | Driving method for vehicle driving system |
| CN103935356A (en) * | 2013-01-17 | 2014-07-23 | 丰田自动车株式会社 | Hybrid vehicle control device and hybrid vehicle |
| CN105317576A (en) * | 2014-06-30 | 2016-02-10 | 丰田自动车株式会社 | Control apparatus for internal combustion engine |
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Effective date of registration: 20201224 Address after: 261061 Shandong city in Weifang province Fu hi tech Industrial Development Zone, East Street No. 197 Patentee after: Weichai Power Co.,Ltd. Patentee after: Weichai Intelligent Technology Co.,Ltd. Address before: 261061 Shandong city in Weifang province Fu hi tech Industrial Development Zone, East Street No. 197 Patentee before: Weichai Power Co.,Ltd. |