CN111911304B - Electronic throttle control system and method - Google Patents
Electronic throttle control system and method Download PDFInfo
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- CN111911304B CN111911304B CN202010854479.0A CN202010854479A CN111911304B CN 111911304 B CN111911304 B CN 111911304B CN 202010854479 A CN202010854479 A CN 202010854479A CN 111911304 B CN111911304 B CN 111911304B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
- F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
- F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
- F02D2041/0022—Controlling intake air for diesel engines by throttle control
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention discloses an electronic throttle control system and a method, wherein the electronic throttle control system comprises: the engine control system comprises a parameter acquisition module, an engine controller, a working condition identification module and a function execution module which are connected in sequence; the parameter acquisition module acquires current operation parameter information and sends the current operation parameter information to the working condition identification module through the engine controller; the working condition identification module analyzes the working condition of the current operation parameter information to obtain a working condition analysis signal and outputs the working condition analysis signal to the function execution module; and the function execution module obtains an electronic throttle opening signal according to the working condition analysis signal and outputs the electronic throttle opening signal to the electronic throttle so as to control the opening of the electronic throttle. Through the mode, the electronic throttle valve is independently controlled under different working conditions, so that the effect of improving the control precision of the electronic throttle valve is achieved.
Description
Technical Field
The invention relates to the technical field of vehicle control, in particular to an electronic throttle control system and method.
Background
Because energy conservation and environmental protection are more and more emphasized, the corresponding fuel consumption regulations of the passenger cars of China are continuously updated and perfected. The use of the electronic throttle valve can enable the engine to obtain good dynamic performance and fuel economy performance by accurately controlling the air inflow. However, because the electronic throttle valve is a flexible controlled object, the rationality of the throttle valve under different working conditions needs to be explained by applying test results, and in the process of a bench test of a gasoline engine, the problem that the rotating speed of a motor in a low rotating speed (less than 800rpm) interval is too low, resonance is easily generated, and the like, so that the bench test environment is severe, the motor load measurement precision cannot be expected, and an accurate test data result cannot be obtained, and a reasonable control strategy is urgently required to be provided for controlling the opening of the electronic throttle valve under different working conditions to obtain complete performance data.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide an electronic throttle valve control system and method, and aims to solve the technical problem of how to improve the control precision of an electronic throttle valve.
To achieve the above object, the present invention provides an electronic throttle control system, comprising: the engine control system comprises a parameter acquisition module, an engine controller, a working condition identification module and a function execution module which are connected in sequence;
the parameter acquisition module is used for acquiring current operation parameter information and sending the current operation parameter information to the working condition identification module through the engine controller;
the working condition identification module is used for carrying out working condition analysis on the current operation parameter information to obtain a working condition analysis signal and outputting the working condition analysis signal to the function execution module;
and the function execution module is used for obtaining an electronic throttle opening signal according to the working condition analysis signal and outputting the electronic throttle opening signal to an electronic throttle so as to control the opening of the electronic throttle.
Preferably, the parameter acquisition module comprises a water temperature sensor, an air inlet temperature sensor, a vehicle speed sensor and an accelerator pedal position sensor;
the water temperature sensor is used for acquiring the current water temperature of an engine cooling system and sending the current water temperature to the working condition identification module through the engine controller;
the air inlet temperature sensor is used for acquiring a current air inlet temperature value of the engine and sending the current air inlet temperature value to the working condition identification module through the engine controller;
the vehicle speed sensor is used for acquiring the current vehicle speed and sending the current vehicle speed to the working condition identification module through the engine controller;
the accelerator pedal position sensor is used for acquiring the current opening value of the accelerator pedal and sending the current opening value of the accelerator pedal to the working condition recognition module through the engine controller.
Preferably, the operating condition identifying module is further configured to obtain an operating condition analysis signal marked as over-temperature when the current water temperature is greater than a preset water temperature threshold or the current intake air temperature value is greater than a preset intake air temperature threshold;
the working condition identification module is also used for obtaining a working condition analysis signal marked as overspeed when the current vehicle speed is greater than a preset vehicle speed threshold value;
the working condition identification module is further used for obtaining a working condition analysis signal marked as acceleration when the current water temperature is smaller than or equal to the preset water temperature threshold, the current air inlet temperature value is smaller than or equal to the preset air inlet temperature threshold, the current vehicle speed is smaller than or equal to the preset vehicle speed threshold, and the current opening value of the accelerator pedal is larger than the preset accelerator pedal opening value;
the working condition identification module is further used for obtaining a working condition analysis signal marked as deceleration when the current water temperature is smaller than or equal to the preset water temperature threshold value, the current air inlet temperature value is smaller than or equal to the preset air inlet temperature threshold value, the current vehicle speed is smaller than or equal to the preset vehicle speed threshold value, and the current opening value of the accelerator pedal is equal to the preset opening value of the accelerator pedal.
Preferably, the function execution module is further configured to determine whether the current opening value of the accelerator pedal is greater than or equal to a preset accelerator pedal opening threshold according to the operating condition analysis signal marked as acceleration;
the function execution module is further configured to obtain an electronic throttle opening signal corresponding to the current opening value of the accelerator pedal when the current opening value of the accelerator pedal is greater than or equal to a preset accelerator pedal opening threshold value, and output the electronic throttle opening signal to the electronic throttle so as to control the opening of the electronic throttle.
Preferably, the electronic throttle control system further includes a safety determination module;
the working condition identification module is used for carrying out working condition analysis on the current operation parameter information to obtain a working condition analysis signal and outputting the working condition analysis signal to the safety judgment module;
the safety judgment module is used for carrying out safety judgment on the working condition analysis signal to obtain a judgment result;
and the safety judgment module is also used for outputting the working condition analysis signal to the function execution module when the judgment result is a safe working condition.
Preferably, the safety determination module is further configured to obtain a determination result of an unsafe operating condition when the operating condition analysis signal is an operating condition analysis signal marked as over-temperature or an operating condition analysis signal marked as overspeed;
and the safety determination module is also used for taking over the function execution module when the determination result is an unsafe working condition to obtain an electronic throttle opening degree signal marked as closed, and outputting the electronic throttle opening degree signal marked as closed to the electronic throttle so as to control the opening degree of the electronic throttle until a preset electronic throttle opening degree value is reached.
Preferably, the safety determination module is further configured to, when an instruction of opening a safety mode by a user is received, acquire current operation parameter information input by the user, receive the function execution module, obtain a corresponding electronic throttle opening signal according to the current operation parameter information, filter the electronic throttle opening signal to obtain a control duty ratio signal, and output the control duty ratio signal to the electronic throttle so as to control the opening of the electronic throttle.
Further, to achieve the above object, the present invention also proposes an electronic throttle control method applied to an electronic throttle control system including: the engine control system comprises a parameter acquisition module, an engine controller, a working condition identification module and a function execution module which are connected in sequence;
the electronic throttle control method includes:
the parameter acquisition module acquires current operation parameter information and sends the current operation parameter information to the working condition identification module through the engine controller;
the working condition identification module analyzes the working condition of the current operation parameter information to obtain a working condition analysis signal and outputs the working condition analysis signal to the function execution module;
and the function execution module obtains an electronic throttle opening signal according to the working condition analysis signal and outputs the electronic throttle opening signal to the electronic throttle so as to control the opening of the electronic throttle.
Preferably, the parameter acquisition module comprises a water temperature sensor, an air inlet temperature sensor, a vehicle speed sensor and an accelerator pedal position sensor;
the parameter acquisition module acquires current operation parameter information and sends the current operation parameter information to the working condition identification module through the engine controller, and the method comprises the following steps:
the water temperature sensor acquires the current water temperature of an engine cooling system and sends the current water temperature to the working condition identification module through the engine controller;
the air inlet temperature sensor acquires a current air inlet temperature value of the engine and sends the current air inlet temperature value to the working condition identification module through the engine controller;
the vehicle speed sensor acquires a current vehicle speed and sends the current vehicle speed to the working condition identification module through the engine controller;
the accelerator pedal position sensor acquires a current opening value of the accelerator pedal and sends the current opening value of the accelerator pedal to the working condition recognition module through the engine controller.
Preferably, the operating condition recognition module performs operating condition analysis on the current operating parameter information to obtain an operating condition analysis signal, and the operating condition analysis signal includes:
the working condition identification module obtains a working condition analysis signal marked as overtemperature when the current water temperature is greater than a preset water temperature threshold or the current intake air temperature value is greater than a preset intake air temperature threshold;
the working condition identification module obtains a working condition analysis signal marked as overspeed when the current vehicle speed is greater than a preset vehicle speed threshold value;
the working condition identification module obtains a working condition analysis signal marked as acceleration when the current water temperature is less than or equal to the preset water temperature threshold, the current air inlet temperature value is less than or equal to the preset air inlet temperature threshold, the current vehicle speed is less than or equal to the preset vehicle speed threshold, and the current opening value of the accelerator pedal is greater than the preset accelerator pedal opening value;
the working condition identification module is used for obtaining a working condition analysis signal marked as deceleration when the current water temperature is smaller than or equal to the preset water temperature threshold value, the current air inlet temperature value is smaller than or equal to the preset air inlet temperature threshold value, the current vehicle speed is smaller than or equal to the preset vehicle speed threshold value, and the current opening value of the accelerator pedal is equal to the preset opening value of the accelerator pedal.
The method comprises the steps of obtaining current operation parameter information through a parameter acquisition module, and sending the current operation parameter information to a working condition identification module through an engine controller; the working condition identification module analyzes the working condition of the current operation parameter information to obtain a working condition analysis signal and outputs the working condition analysis signal to the function execution module; and the function execution module obtains an electronic throttle opening signal according to the working condition analysis signal and outputs the electronic throttle opening signal to the electronic throttle so as to control the opening of the electronic throttle. By the mode, the working conditions of different operation parameters are analyzed, and the electronic throttle valve is independently controlled under different working conditions, so that the effect of improving the control precision of the electronic throttle valve is achieved.
Drawings
FIG. 1 is a block diagram of the construction of a first embodiment of an electronic throttle control system according to the present invention;
FIG. 2 is a block diagram of a second embodiment of an electronic throttle control system according to the present invention;
FIG. 3 is a flowchart illustrating a first exemplary embodiment of an electronic throttle control method according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a block diagram showing the structure of a first embodiment of an electronic throttle control system according to the present invention.
The electronic throttle control system includes: the device comprises a parameter acquisition module 10, an engine controller 20, a working condition identification module 30 and a function execution module 40 which are connected in sequence.
The parameter acquisition module 10 is configured to acquire current operation parameter information and send the current operation parameter information to the operating condition identification module 30 through the engine controller 20.
The electronic throttle control system proposed in the present embodiment may be mounted on a bench for performing data testing on a gasoline engine type vehicle equipped with an electronic throttle, or may be mounted on a gasoline engine type vehicle equipped with an electronic throttle. In the present embodiment, a bench test is taken as an example for explanation.
It can be understood that, in the bench test process, the engine controller 20 and the real-time controller are used for parallel control, and the engine electric control parts are cooperatively controlled. The actuators of the electrically controlled components of the engine, except the electronic throttle valve, are controlled using the engine controller 20. The electronic throttle valve is independently controlled by a real-time controller, and the real-time controller comprises a working condition identification module, a function execution module and a safety judgment module. The electric control component actuator of the engine except the electronic throttle valve comprises: ignition coil of each cylinder and fuel injector of each cylinder. Each cylinder ignition coil is an output signal actuator of the engine controller 20 and is controlled by the engine controller 20; each cylinder injector is an output signal actuator of the engine controller 20, and is controlled by the engine controller 20.
Specifically, the parameter acquisition module 10 comprises a water temperature sensor, an intake air temperature sensor, a vehicle speed sensor and an accelerator pedal position sensor; the water temperature sensor is used for acquiring the current water temperature of an engine cooling system and sending the current water temperature to the working condition identification module through the engine controller; the air inlet temperature sensor is used for acquiring a current air inlet temperature value of the engine and sending the current air inlet temperature value to the working condition identification module through the engine controller; the vehicle speed sensor is used for acquiring the current vehicle speed and sending the current vehicle speed to the working condition identification module through the engine controller; the accelerator pedal position sensor is used for acquiring the current opening value of the accelerator pedal and sending the current opening value of the accelerator pedal to the working condition recognition module through the engine controller.
It should be noted that the parameter acquisition module 10 includes various sensors for acquiring information of current operating parameters, and includes, in addition to a water temperature sensor, an intake air temperature sensor, a vehicle speed sensor, and an accelerator pedal position sensor: crankshaft position sensors, pre-oxygen signal sensors, intake and intake air pressure sensors, etc.
The crankshaft position sensor is primarily used to measure engine speed, which is input to the engine controller 20. Which is the input signal of the logic and is the timing basis signal for the operation of the engine.
The pre-oxygen signal sensor is used to measure the measured air-fuel ratio of the engine and input it to the engine controller 20. This signal is used to perform coordinated control between throttle control by the real-time controller and fuel injection amount control by the engine controller 20.
The intake pressure sensor is mainly used to measure the real-time engine intake pressure value, which is input to the engine controller 20, and reflects the load condition of the engine, which is the basic signal of the engine operation.
It is understood that, for the engine controller 20, signals of a water temperature sensor, an intake air temperature sensor, a vehicle speed sensor, an accelerator pedal position sensor, a crank position sensor, a front oxygen signal sensor, and intake air pressure sensors are acquired, and engine rotation speed and execution signals corresponding to each cylinder ignition coil and each cylinder injector are output.
It is understood that the engine controller and the real-time controller perform information interaction through the CAN network, that is, the engine controller 20 outputs the current operation parameter information to the operating condition identification module 30 through the CAN network.
The working condition recognition module 30 is configured to analyze the working condition of the current operation parameter information to obtain a working condition analysis signal, and output the working condition analysis signal to the function execution module 40.
Specifically, the operating condition identifying module 30 is further configured to obtain an operating condition analysis signal marked as over-temperature when the current water temperature is greater than a preset water temperature threshold or the current intake air temperature value is greater than a preset intake air temperature threshold; the working condition identification module 30 is further configured to obtain a working condition analysis signal marked as overspeed when the current vehicle speed is greater than a preset vehicle speed threshold; the working condition identification module 30 is further configured to obtain a working condition analysis signal marked as acceleration when the current water temperature is less than or equal to the preset water temperature threshold, the current intake air temperature value is less than or equal to the preset intake air temperature threshold, the current vehicle speed is less than or equal to the preset vehicle speed threshold, and the current accelerator pedal opening value is greater than the preset accelerator pedal opening value; the working condition recognition module 30 is further configured to obtain a working condition analysis signal marked as deceleration when the current water temperature is less than or equal to the preset water temperature threshold, the current air intake temperature value is less than or equal to the preset air intake temperature threshold, the current vehicle speed is less than or equal to the preset vehicle speed threshold, and the current opening value of the accelerator pedal is equal to the preset accelerator pedal opening value.
It is understood that the current operating parameter information received by the condition identification module 30 includes: water temperature, intake air temperature value, vehicle speed, accelerator pedal opening degree value and the like. By analyzing the information of the operating parameters, the obtained working condition analysis signal comprises: over-temperature, over-speed, acceleration, and deceleration, and the condition analysis signal is input to the function execution module 40 when the condition analysis signal is a condition analysis signal marked as acceleration and marked as deceleration. And when the four conditions are not met, obtaining a working condition analysis signal marked as other conditions. When the condition-analyzed signal is a condition-analyzed signal labeled as other, the condition-analyzed signal is input to the function execution module 40.
For example, the preset water temperature threshold is 95 ℃, the preset intake air temperature threshold is 60 ℃, the preset vehicle speed threshold is 60KM/H, the preset accelerator pedal opening value is 0, and when the current water temperature is greater than 90 ℃ or the current intake air temperature value is greater than 60 ℃, other two parameters are not considered, so that a working condition analysis signal marked as overtemperature is obtained; when the current vehicle speed is greater than 60KM/H, the other three parameters are not considered, and a working condition analysis signal marked as overspeed is obtained; when the current water temperature is less than or equal to 95 ℃, the current air inlet temperature value is less than or equal to 60 ℃, the current vehicle speed is less than or equal to 60KM/H, and the current opening value of the accelerator pedal is greater than 0, obtaining a working condition analysis signal marked as acceleration; and when the current water temperature is less than or equal to 95 ℃, the current air inlet temperature value is less than or equal to 60 ℃, the current vehicle speed is less than or equal to 60KM/H, and the current opening value of the accelerator pedal is equal to 0, obtaining a working condition analysis signal marked as deceleration. And under the condition that the working condition analysis signal is over-temperature and over-speed, the input working condition analysis signal is the working condition analysis signal marked as over-temperature and the working condition analysis signal marked as over-speed.
It should be noted that the operating condition identifying module 30 outputs an operating condition analyzing signal, a current water temperature, a current intake air temperature value, a current vehicle speed, and a current opening value of the accelerator pedal to the function executing module 40 and the safety judging module. The corresponding relation of the working condition analysis signals is as follows: 0-others; 1-acceleration; 2, decelerating; 3-overtemperature; 4-overspeed, other signals are also possible, and this embodiment is not limited to this.
And the function execution module 40 is configured to obtain an electronic throttle opening signal according to the working condition analysis signal, and output the electronic throttle opening signal to an electronic throttle so as to control the opening of the electronic throttle.
It can be understood that the accelerator pedal position sensor transmits the information that the driver needs to accelerate or decelerate to the function execution module 40, the function execution module 40 calculates the corresponding optimal throttle position according to the obtained information, sends a control signal to the throttle actuator, and the throttle actuator opens the throttle valve to the calculated optimal throttle opening position.
Specifically, the function execution module is further configured to determine whether the current opening value of the accelerator pedal is greater than or equal to a preset accelerator pedal opening threshold value according to the operating condition analysis signal marked as acceleration; the function execution module is further configured to obtain an electronic throttle opening signal corresponding to the current opening value of the accelerator pedal when the current opening value of the accelerator pedal is greater than or equal to a preset accelerator pedal opening threshold value, and output the electronic throttle opening signal to the electronic throttle so as to control the opening of the electronic throttle.
It can be understood that the working condition identification module sends three groups of signals, namely a working condition analysis signal, an accelerator pedal signal and a vehicle speed signal, to the function execution module.
For example, the preset accelerator pedal opening threshold is 10, when the current accelerator pedal opening value is greater than or equal to 10, the acceleration signal is executed, and when the current accelerator pedal opening value is less than 10, the acceleration signal is not executed.
It should be noted that, when executing the acceleration signal, the electronic throttle opening degree signal is filtered to obtain a control duty ratio signal, and the control duty ratio signal is output to the electronic throttle to control the opening degree of the electronic throttle, and the transient speed of executing the electronic throttle signal can be adjusted through the signal filtering function. The acceleration signal is limited by a preset electronic throttle opening value, namely the opening of the electronic throttle is greater than or equal to the preset electronic throttle opening value, and the preset electronic throttle opening value is a minimum opening default value.
The method comprises the steps that current operation parameter information is obtained through a parameter acquisition module and sent to a working condition recognition module through an engine controller; the working condition identification module analyzes the working condition of the current operation parameter information to obtain a working condition analysis signal and outputs the working condition analysis signal to the function execution module; and the function execution module obtains an electronic throttle opening signal according to the working condition analysis signal and outputs the electronic throttle opening signal to the electronic throttle so as to control the opening of the electronic throttle. By the mode, the working conditions of different operation parameters are analyzed, and the electronic throttle valve is independently controlled under different working conditions, so that the effect of improving the control precision of the electronic throttle valve is achieved.
Referring to fig. 2, fig. 2 is a block diagram showing the structure of a second embodiment of the electronic throttle control system according to the present invention.
Based on the above-described first embodiment, a second embodiment of the electronic throttle control system of the invention is proposed.
The electronic throttle control system also includes a safety determination module 50.
The working condition recognition module 30 is configured to analyze the working condition of the current operation parameter information to obtain a working condition analysis signal, and output the working condition analysis signal to the safety determination module 50.
And the safety judgment module 30 is used for performing safety judgment on the working condition analysis signal to obtain a judgment result.
It is understood that the determination result is a safe condition when the condition analysis signal is a condition analysis signal marked as acceleration or a condition analysis signal marked as deceleration or other condition analysis signals. And when the received working condition analysis signal is 1 or 2 or 0, obtaining a judgment result of the safe working condition.
The safety determination module 50 is further configured to output the working condition analysis signal to the function execution module 40 when the determination result is a safe working condition.
The safety determination module 50 is further configured to obtain a determination result of an unsafe condition when the operating condition analysis signal is an operating condition analysis signal marked as over-temperature or an operating condition analysis signal marked as over-speed.
It can be understood that when the received operating condition analysis signal is 3 or 4, the judgment result of the unsafe operating condition is obtained.
The safety determination module 50 is further configured to take over the function execution module 40 when the determination result is the unsafe operating condition, obtain the electronic throttle opening degree signal marked as closed, and output the electronic throttle opening degree signal marked as closed to the electronic throttle so as to control the opening degree of the electronic throttle until a preset electronic throttle opening degree value is reached.
It should be noted that, when executing the closing signal, filtering the electronic throttle opening signal to obtain a control duty ratio signal, outputting the control duty ratio signal to the electronic throttle to control the opening of the electronic throttle, achieving the controllability of the closing process through the signal filtering function, and adjusting the closing speed of the electronic throttle signal through changing the filtering strategy. The acceleration signal is limited by a preset electronic throttle opening value, namely the opening of the electronic throttle is greater than or equal to the preset electronic throttle opening value, and the preset electronic throttle opening value is a minimum opening default value.
It should be noted that the safety determination module 50 is further configured to broadcast an unsafe operating condition signal to the CAN network, so that the engine controller obtains the unsafe operating condition signal and controls an engine electronic control component actuator except for the electronic throttle to execute an unsafe instruction.
Specifically, the safety determination module 50 is further configured to, when receiving an instruction of a user to start a safety mode, obtain current operation parameter information input by the user, receive the function execution module, obtain a corresponding electronic throttle opening signal according to the current operation parameter information, filter the electronic throttle opening signal to obtain a control duty ratio signal, and output the control duty ratio signal to the electronic throttle to control the opening of the electronic throttle.
It can be understood that, a user opens the safety mode, inputs current operation parameter information, such as water temperature, intake temperature value, vehicle speed, accelerator pedal opening value and the like, and also inputs a preset electronic throttle opening value, at this time, the safety judgment module receives the function execution module in parallel, obtains a corresponding electronic throttle opening signal according to the current operation parameter information input by the user, filters the electronic throttle opening signal to obtain a control duty ratio signal, and outputs the control duty ratio signal to the electronic throttle so as to control the opening of the electronic throttle. When the signal for closing the electronic throttle valve is executed, the electronic throttle valve is limited by a preset electronic throttle valve opening value input by a user, namely, the opening of the electronic throttle valve is greater than or equal to the preset electronic throttle valve opening value.
The working condition analysis signal that this embodiment sent the working condition identification module through the safety judgment module is judged, with working condition analysis signal output to function execution module under safe working condition, direct control is in order to close electronic throttle under the unsafe working condition, has realized electronic throttle single control under safe and unsafe working condition, has improved electronic throttle's control accuracy when guaranteeing safety.
Further, referring to fig. 3, fig. 3 is a schematic flow chart of a first embodiment of an electronic throttle control method according to the present invention, where the electronic throttle control method is applied to an electronic throttle control system, and the intelligent flower box control system includes: the engine control system comprises a parameter acquisition module, an engine controller, a working condition identification module and a function execution module which are connected in sequence;
the electronic throttle control method includes:
step S10: the parameter acquisition module acquires current operation parameter information and sends the current operation parameter information to the working condition identification module through the engine controller.
The electronic throttle control system proposed in the present embodiment may be mounted on a bench for performing data testing on a gasoline engine type vehicle equipped with an electronic throttle, or may be mounted on a gasoline engine type vehicle equipped with an electronic throttle. In the present embodiment, a bench test is taken as an example for explanation.
It can be understood that in the bench test process, the engine controller and the real-time controller are used for parallel control, and each electric control part of the engine is cooperatively controlled. The actuators of the engine electric control parts except the electronic throttle valve are controlled by an engine controller. The electronic throttle valve is independently controlled by a real-time controller, and the real-time controller comprises a working condition identification module, a function execution module and a safety judgment module. The electric control component actuator of the engine except the electronic throttle valve comprises: ignition coil of each cylinder and fuel injector of each cylinder. Each cylinder ignition coil is an output signal actuator of an engine controller and is controlled by the engine controller; the oil injector of each cylinder is an output signal actuator of the engine controller and is controlled by the engine controller.
Specifically, the parameter acquisition module comprises a water temperature sensor, an air inlet temperature sensor, a vehicle speed sensor and an accelerator pedal position sensor; step S10, including: the water temperature sensor acquires the current water temperature of an engine cooling system and sends the current water temperature to the working condition identification module through the engine controller; the air inlet temperature sensor acquires a current air inlet temperature value of the engine and sends the current air inlet temperature value to the working condition identification module through the engine controller; the vehicle speed sensor acquires a current vehicle speed and sends the current vehicle speed to the working condition identification module through the engine controller; the accelerator pedal position sensor acquires a current opening value of the accelerator pedal and sends the current opening value of the accelerator pedal to the working condition recognition module through the engine controller.
It should be noted that the parameter acquisition module includes various sensors for acquiring information of current operating parameters, and includes, in addition to the water temperature sensor, the intake air temperature sensor, the vehicle speed sensor and the accelerator pedal position sensor: crankshaft position sensors, pre-oxygen signal sensors, intake and intake air pressure sensors, etc.
The crankshaft position sensor is mainly used for measuring the rotating speed of the engine and inputting the rotating speed to the engine controller. Which is the input signal of the logic and is the timing basis signal for the operation of the engine.
The front oxygen signal sensor is mainly used for measuring the actually measured air-fuel ratio of the engine and inputting the actually measured air-fuel ratio to the engine controller. The signal is used for coordinated linkage control between throttle control of the real-time controller and fuel injection amount control of the engine controller.
The intake pressure sensor is mainly used for measuring the real-time engine intake pressure value, inputting the real-time engine intake pressure value to the engine controller, reflecting the load condition of the engine, and being a basic signal of the operation of the engine.
It can be understood that, for the engine controller, signals of a water temperature sensor, an intake air temperature sensor, a vehicle speed sensor, an accelerator pedal position sensor, a crankshaft position sensor, a front oxygen signal sensor and intake air pressure sensors are obtained, and engine rotation speed and execution signals corresponding to each cylinder ignition coil and each cylinder fuel injector are output.
It CAN be understood that the engine controller and the real-time controller perform information interaction through the CAN network, that is, the engine controller outputs the current operation parameter information to the operating condition identification module through the CAN network.
Step S20: and the working condition identification module analyzes the working condition of the current operation parameter information to obtain a working condition analysis signal and outputs the working condition analysis signal to the function execution module.
Specifically, the operating condition recognition module analyzes the operating condition of the current operating parameter information to obtain an operating condition analysis signal, and the operating condition analysis signal includes: the working condition identification module obtains a working condition analysis signal marked as overtemperature when the current water temperature is greater than a preset water temperature threshold or the current intake air temperature value is greater than a preset intake air temperature threshold; the working condition identification module obtains a working condition analysis signal marked as overspeed when the current vehicle speed is greater than a preset vehicle speed threshold value; the working condition identification module obtains a working condition analysis signal marked as acceleration when the current water temperature is less than or equal to the preset water temperature threshold, the current air inlet temperature value is less than or equal to the preset air inlet temperature threshold, the current vehicle speed is less than or equal to the preset vehicle speed threshold, and the current opening value of the accelerator pedal is greater than the preset accelerator pedal opening value; the working condition identification module is used for obtaining a working condition analysis signal marked as deceleration when the current water temperature is smaller than or equal to the preset water temperature threshold value, the current air inlet temperature value is smaller than or equal to the preset air inlet temperature threshold value, the current vehicle speed is smaller than or equal to the preset vehicle speed threshold value, and the current opening value of the accelerator pedal is equal to the preset opening value of the accelerator pedal.
It is understood that the current operating parameter information received by the condition identifying module includes: water temperature, air inlet temperature value, vehicle speed and accelerator pedal opening value. By analyzing the information of the operating parameters, the obtained working condition analysis signal comprises: and when the working condition analysis signal is the working condition analysis signal marked as acceleration and marked as deceleration, the working condition analysis signal is input to the function execution module. And when the four conditions are not met, obtaining a working condition analysis signal marked as other conditions. And when the working condition analysis signal is marked as other working condition analysis signals, inputting the working condition analysis signals to the function execution module.
For example, the preset water temperature threshold is 95 ℃, the preset intake air temperature threshold is 60 ℃, the preset vehicle speed threshold is 60KM/H, the preset accelerator pedal opening value is 0, and when the current water temperature is greater than 90 ℃ or the current intake air temperature value is greater than 60 ℃, other two parameters are not considered, so that a working condition analysis signal marked as overtemperature is obtained; when the current vehicle speed is greater than 60KM/H, the other three parameters are not considered, and a working condition analysis signal marked as overspeed is obtained; when the current water temperature is less than or equal to 95 ℃, the current air inlet temperature value is less than or equal to 60 ℃, the current vehicle speed is less than or equal to 60KM/H, and the current opening value of the accelerator pedal is greater than 0, obtaining a working condition analysis signal marked as acceleration; and when the current water temperature is less than or equal to 95 ℃, the current air inlet temperature value is less than or equal to 60 ℃, the current vehicle speed is less than or equal to 60KM/H, and the current opening value of the accelerator pedal is equal to 0, obtaining a working condition analysis signal marked as deceleration. And under the condition that the working condition analysis signal is over-temperature and over-speed, the input working condition analysis signal is the working condition analysis signal marked as over-temperature and the working condition analysis signal marked as over-speed.
It should be noted that the working condition identification module outputs a working condition analysis signal, a current water temperature, a current intake temperature value, a current vehicle speed and a current opening value of the accelerator pedal to the function execution module and the safety judgment module. The corresponding relation of the working condition analysis signals is as follows: 0-others; 1-acceleration; 2, decelerating; 3-overtemperature; 4-overspeed, other signals are also possible, and this embodiment is not limited to this.
Step S30: and the function execution module obtains an electronic throttle opening signal according to the working condition analysis signal and outputs the electronic throttle opening signal to the electronic throttle so as to control the opening of the electronic throttle.
It can be understood that the accelerator pedal position sensor transmits the information that the driver needs to accelerate or decelerate to the function execution module, the function execution module calculates the corresponding optimal throttle valve position according to the obtained information, sends a control signal to the throttle valve actuator, and the throttle valve actuator opens the throttle valve to the calculated optimal throttle valve opening position.
Specifically, the function execution module judges whether the current opening value of the accelerator pedal is greater than or equal to a preset accelerator pedal opening threshold value according to the working condition analysis signal marked as acceleration; the function execution module obtains an electronic throttle opening signal corresponding to the current opening value of the accelerator pedal when the current opening value of the accelerator pedal is larger than or equal to a preset accelerator pedal opening threshold value, and outputs the electronic throttle opening signal to the electronic throttle so as to control the opening of the electronic throttle.
For example, the preset accelerator pedal opening threshold is 10, when the current accelerator pedal opening value is greater than or equal to 10, the acceleration signal is executed, and when the current accelerator pedal opening value is less than 10, the acceleration signal is not executed.
It should be noted that, when executing the acceleration signal, the electronic throttle opening degree signal is filtered to obtain a control duty ratio signal, and the control duty ratio signal is output to the electronic throttle to control the opening degree of the electronic throttle, and the transient speed of executing the electronic throttle signal can be adjusted through the signal filtering function. The acceleration signal is limited by a preset electronic throttle opening value, namely the opening of the electronic throttle is greater than or equal to the preset electronic throttle opening value, and the preset electronic throttle opening value is a minimum opening default value.
The method comprises the steps that current operation parameter information is obtained through a parameter acquisition module and sent to a working condition recognition module through an engine controller; the working condition identification module analyzes the working condition of the current operation parameter information to obtain a working condition analysis signal and outputs the working condition analysis signal to the function execution module; and the function execution module obtains an electronic throttle opening signal according to the working condition analysis signal and outputs the electronic throttle opening signal to the electronic throttle so as to control the opening of the electronic throttle. By the mode, the working conditions of different operation parameters are analyzed, and the electronic throttle valve is independently controlled under different working conditions, so that the effect of improving the control precision of the electronic throttle valve is achieved.
In one example, the electronic throttle control system further includes a safety determination module;
the working condition recognition module analyzes the working condition of the current operation parameter information to obtain a working condition analysis signal, and outputs the working condition analysis signal to the function execution module, and the method further comprises the following steps:
the working condition identification module analyzes the working condition of the current operation parameter information to obtain a working condition analysis signal and outputs the working condition analysis signal to the safety judgment module;
the safety judgment module is used for carrying out safety judgment on the working condition analysis signal to obtain a judgment result;
and the safety judgment module outputs the working condition analysis signal to the function execution module when the judgment result is a safe working condition.
In one example, the safety determination module performs safety determination on the operating condition analysis signal to obtain a determination result, and includes: the safety judgment module obtains a judgment result of a non-safety working condition when the working condition analysis signal is a working condition analysis signal marked as overtemperature or a working condition analysis signal marked as overspeed;
the safety judgment module carries out safety judgment on the working condition analysis signal, and after a judgment result is obtained, the safety judgment module further comprises:
and the safety determination module takes over the function execution module when the determination result is the non-safety working condition to obtain the electronic throttle opening degree signal marked as closed, and outputs the electronic throttle opening degree signal marked as closed to the electronic throttle so as to control the opening degree of the electronic throttle until the opening degree value of the electronic throttle reaches a preset opening degree value.
In one example, before the parameter acquisition module acquires current operation parameter information and sends the current operation parameter information to the operating condition identification module through the engine controller, the method further includes:
the safety judgment module acquires current operation parameter information input by a user when receiving an instruction of opening a safety mode by the user, receives the current operation parameter information, receives the function execution module, obtains a corresponding electronic throttle opening signal according to the current operation parameter information, filters the electronic throttle opening signal to obtain a control duty ratio signal, and outputs the control duty ratio signal to the electronic throttle so as to control the opening of the electronic throttle.
Further, it is to be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system 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 system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention or portions thereof that contribute to the prior art may be embodied in the form of a software product, where the computer software product is stored in a storage medium (e.g. Read Only Memory (ROM)/RAM, magnetic disk, optical disk), and includes several instructions for enabling a terminal device (e.g. a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. An electronic throttle control system, comprising: the system comprises a parameter acquisition module, an engine controller, a working condition identification module and a function execution module which are sequentially connected, wherein the parameter acquisition module comprises a crankshaft position sensor, a front oxygen signal sensor and an air inlet pressure sensor;
the parameter acquisition module is used for acquiring current operation parameter information and sending the current operation parameter information to the working condition identification module through the engine controller;
the engine controller is used for acquiring signals of the crankshaft position sensor, the pre-oxygen signal sensor and the air inlet pressure sensor, and outputting engine rotating speed and execution signals corresponding to each cylinder ignition coil and each cylinder oil injector to the working condition identification module;
the working condition identification module is used for carrying out working condition analysis on the current operation parameter information to obtain a working condition analysis signal and outputting the working condition analysis signal to the function execution module, and the current operation parameter information comprises: temperature, inlet air temperature, speed of a motor vehicle, accelerator pedal opening value, engine speed, actual measurement air-fuel ratio and engine pressure value of admitting air, operating mode analysis signal includes: overtemperature, overspeed, acceleration, and deceleration;
the working condition identification module is further used for inputting the working condition analysis signal to the function execution module when the working condition analysis signal is marked as acceleration or marked as deceleration;
the working condition identification module is further used for marking the working condition analysis signals as other working condition analysis signals when the working condition analysis signals do not meet the four marks of overtemperature, overspeed, acceleration and deceleration, and inputting the working condition analysis signals to the function execution module;
the function execution module is used for obtaining an electronic throttle opening signal according to the working condition analysis signal and outputting the electronic throttle opening signal to an electronic throttle so as to control the opening of the electronic throttle;
the electronic throttle control system also comprises a safety judgment module;
the working condition identification module is also used for carrying out working condition analysis on the current operation parameter information to obtain a working condition analysis signal and outputting the working condition analysis signal to the safety judgment module;
the safety judgment module is further used for obtaining a judgment result of the safety working condition when the working condition analysis signal is marked as an accelerated working condition analysis signal, a decelerated working condition analysis signal or other working condition analysis signals;
the safety judgment module is also used for obtaining a judgment result of a non-safety working condition when the working condition analysis signal is a working condition analysis signal marked as overtemperature or a working condition analysis signal marked as overspeed;
the safety judgment module is also used for outputting the working condition analysis signal to the function execution module when the judgment result is a safe working condition;
the safety judgment module is further configured to, when an instruction of a user to start a safety mode is received, acquire current operation parameter information input by the user, take over the function execution module, obtain a corresponding electronic throttle opening signal according to the current operation parameter information, filter the electronic throttle opening signal to obtain a control duty ratio signal, and output the control duty ratio signal to the electronic throttle so as to control the opening of the electronic throttle.
2. The electronic throttle control system of claim 1, wherein the parameter acquisition module includes a water temperature sensor, an intake air temperature sensor, a vehicle speed sensor, and an accelerator pedal position sensor;
the water temperature sensor is used for acquiring the current water temperature of an engine cooling system and sending the current water temperature to the working condition identification module through the engine controller;
the air inlet temperature sensor is used for acquiring a current air inlet temperature value of the engine and sending the current air inlet temperature value to the working condition identification module through the engine controller;
the vehicle speed sensor is used for acquiring the current vehicle speed and sending the current vehicle speed to the working condition identification module through the engine controller;
the accelerator pedal position sensor is used for acquiring the current opening value of the accelerator pedal and sending the current opening value of the accelerator pedal to the working condition recognition module through the engine controller.
3. The electronic throttle control system of claim 2, wherein the operating condition identification module is further configured to obtain an operating condition analysis signal marked as over-temperature when the current water temperature is greater than a preset water temperature threshold or the current intake air temperature value is greater than a preset intake air temperature threshold;
the working condition identification module is also used for obtaining a working condition analysis signal marked as overspeed when the current vehicle speed is greater than a preset vehicle speed threshold value;
the working condition identification module is further used for obtaining a working condition analysis signal marked as acceleration when the current water temperature is smaller than or equal to the preset water temperature threshold, the current air inlet temperature value is smaller than or equal to the preset air inlet temperature threshold, the current vehicle speed is smaller than or equal to the preset vehicle speed threshold, and the current opening value of the accelerator pedal is larger than the preset accelerator pedal opening value;
the working condition identification module is further used for obtaining a working condition analysis signal marked as deceleration when the current water temperature is smaller than or equal to the preset water temperature threshold value, the current air inlet temperature value is smaller than or equal to the preset air inlet temperature threshold value, the current vehicle speed is smaller than or equal to the preset vehicle speed threshold value, and the current opening value of the accelerator pedal is equal to the preset opening value of the accelerator pedal.
4. The electronic throttle control system of claim 3, wherein the function execution module is further configured to determine whether the current accelerator pedal opening value is greater than or equal to a preset accelerator pedal opening threshold value according to the operating condition analysis signal marked as acceleration;
the function execution module is further configured to obtain an electronic throttle opening signal corresponding to the current opening value of the accelerator pedal when the current opening value of the accelerator pedal is greater than or equal to a preset accelerator pedal opening threshold value, and output the electronic throttle opening signal to the electronic throttle so as to control the opening of the electronic throttle.
5. The electronic throttle control system of claim 1, wherein the safety determination module is further configured to obtain a determination of an unsafe condition when the condition analysis signal is a condition analysis signal marked as over-temperature or a condition analysis signal marked as over-speed;
and the safety determination module is also used for taking over the function execution module when the determination result is an unsafe working condition to obtain an electronic throttle opening degree signal marked as closed, and outputting the electronic throttle opening degree signal marked as closed to the electronic throttle so as to control the opening degree of the electronic throttle until a preset electronic throttle opening degree value is reached.
6. An electronic throttle control method, characterized in that the electronic throttle control method is applied to an electronic throttle control system, which includes: the system comprises a parameter acquisition module, an engine controller, a working condition identification module and a function execution module which are sequentially connected, wherein the parameter acquisition module comprises a crankshaft position sensor, a front oxygen signal sensor and an air inlet pressure sensor; the electronic throttle control method includes:
the parameter acquisition module acquires current operation parameter information and sends the current operation parameter information to the working condition identification module through the engine controller;
the engine controller acquires signals of the crankshaft position sensor, the pre-oxygen signal sensor and the air inlet pressure sensor, and outputs engine rotating speed and execution signals corresponding to each cylinder ignition coil and each cylinder oil injector to the working condition identification module;
the working condition identification module analyzes the working condition of the current operation parameter information to obtain a working condition analysis signal, and outputs the working condition analysis signal to the function execution module, wherein the current operation parameter information comprises: temperature, inlet air temperature, speed of a motor vehicle, accelerator pedal opening value, engine speed, actual measurement air-fuel ratio and engine pressure value of admitting air, operating mode analysis signal includes: overtemperature, overspeed, acceleration, and deceleration;
the working condition identification module inputs the working condition analysis signal to the function execution module when the working condition analysis signal is marked as acceleration or is marked as deceleration;
when the working condition analysis signal does not meet the four marks of over-temperature, over-speed, acceleration and deceleration, the working condition identification module marks the working condition analysis signal as other working condition analysis signals and inputs the working condition analysis signals to the function execution module;
the function execution module obtains an electronic throttle opening signal according to the working condition analysis signal and outputs the electronic throttle opening signal to the electronic throttle so as to control the opening of the electronic throttle;
the electronic throttle control system also comprises a safety judgment module; the working condition identification module analyzes the working condition of the current operation parameter information to obtain a working condition analysis signal, and outputs the working condition analysis signal to the function execution module, and the working condition analysis module comprises the following steps:
the working condition identification module analyzes the working condition of the current operation parameter information to obtain a working condition analysis signal and outputs the working condition analysis signal to the safety judgment module;
the safety judgment module obtains a judgment result of the safety working condition when the working condition analysis signal is marked as an accelerated working condition analysis signal, a decelerated working condition analysis signal or other working condition analysis signals;
the safety judgment module obtains a judgment result of a non-safety working condition when the working condition analysis signal is a working condition analysis signal marked as overtemperature or a working condition analysis signal marked as overspeed;
the safety judgment module outputs the working condition analysis signal to the function execution module when the judgment result is a safe working condition;
the safety judgment module acquires current operation parameter information input by a user when receiving an instruction of opening a safety mode by the user, receives the current operation parameter information, receives the function execution module, obtains a corresponding electronic throttle opening signal according to the current operation parameter information, filters the electronic throttle opening signal to obtain a control duty ratio signal, and outputs the control duty ratio signal to the electronic throttle so as to control the opening of the electronic throttle.
7. The electronic throttle control method according to claim 6, wherein the parameter acquisition module includes a water temperature sensor, an intake air temperature sensor, a vehicle speed sensor, and an accelerator pedal position sensor;
the parameter acquisition module acquires current operation parameter information and sends the current operation parameter information to the working condition identification module through the engine controller, and the method comprises the following steps:
the water temperature sensor acquires the current water temperature of an engine cooling system and sends the current water temperature to the working condition identification module through the engine controller;
the air inlet temperature sensor acquires a current air inlet temperature value of the engine and sends the current air inlet temperature value to the working condition identification module through the engine controller;
the vehicle speed sensor acquires a current vehicle speed and sends the current vehicle speed to the working condition identification module through the engine controller;
the accelerator pedal position sensor acquires a current opening value of the accelerator pedal and sends the current opening value of the accelerator pedal to the working condition recognition module through the engine controller.
8. The electronic throttle control method of claim 7, wherein the operating condition identifying module performs an operating condition analysis on the current operating parameter information to obtain an operating condition analysis signal, comprising:
the working condition identification module obtains a working condition analysis signal marked as overtemperature when the current water temperature is greater than a preset water temperature threshold or the current intake air temperature value is greater than a preset intake air temperature threshold;
the working condition identification module obtains a working condition analysis signal marked as overspeed when the current vehicle speed is greater than a preset vehicle speed threshold value;
the working condition identification module obtains a working condition analysis signal marked as acceleration when the current water temperature is less than or equal to the preset water temperature threshold, the current air inlet temperature value is less than or equal to the preset air inlet temperature threshold, the current vehicle speed is less than or equal to the preset vehicle speed threshold, and the current opening value of the accelerator pedal is greater than the preset accelerator pedal opening value;
the working condition identification module is used for obtaining a working condition analysis signal marked as deceleration when the current water temperature is smaller than or equal to the preset water temperature threshold value, the current air inlet temperature value is smaller than or equal to the preset air inlet temperature threshold value, the current vehicle speed is smaller than or equal to the preset vehicle speed threshold value, and the current opening value of the accelerator pedal is equal to the preset opening value of the accelerator pedal.
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