CN114320624B - Super-boost control method and system of supercharged gasoline engine and vehicle - Google Patents
Super-boost control method and system of supercharged gasoline engine and vehicle Download PDFInfo
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- CN114320624B CN114320624B CN202111665967.8A CN202111665967A CN114320624B CN 114320624 B CN114320624 B CN 114320624B CN 202111665967 A CN202111665967 A CN 202111665967A CN 114320624 B CN114320624 B CN 114320624B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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Abstract
The invention discloses a supercharged gasoline engine super-supercharging control method, a supercharged gasoline engine super-supercharging control system and a vehicle, comprising the following steps: detecting the running boundary and the state of an accelerator pedal of the whole vehicle, wherein the state of the accelerator pedal is the state of the opening degree or the change rate of the accelerator pedal; judging whether the running boundary of the whole vehicle and the state of the accelerator pedal meet the condition of the super-pressurization mode, if so, controlling the supercharged gasoline engine to enter the super-pressurization mode, continuously monitoring whether the running boundary of the whole vehicle and the state of the accelerator pedal meet the condition of the super-pressurization mode, if so, continuously operating the super-pressurization mode by the supercharged gasoline engine, judging whether the super-pressurization action time reaches the preset super-pressurization action time, and if so, locking the super-pressurization mode until the time for locking the super-pressurization mode reaches the preset locking time. By the super-boost control method of the supercharged gasoline engine, the output torque of the engine can be instantaneously increased, so that the power requirements of the working conditions of overtaking, rapid acceleration and the like of the whole automobile are met, the excellent transient acceleration performance of the whole automobile is obtained, and the driving experience of a user is improved.
Description
Technical Field
The invention relates to the technical field of supercharged gasoline engine control, in particular to a supercharged gasoline engine super-supercharging control method, a supercharged gasoline engine super-supercharging control system and a vehicle.
Background
With the continuous expansion of the automobile market, the number of people purchasing the automobile is continuously increased, consumers do not only replace the walking requirement on the automobile, but also put forward higher requirements on the drivability of the automobile, and particularly, the automobile is required to have good acceleration performance under special working conditions such as rapid acceleration, hundred kilometers acceleration and the like after overtaking and waiting for a red light. In the stage of developing the whole vehicle, if the aim of improving the acceleration of the whole vehicle is achieved by adjusting the hardware state, the mass production of the whole vehicle is delayed, and meanwhile, the manpower, material resources and cost are increased. For the supercharged gasoline engine, the output torque of the engine can be well improved by using the super supercharging function, so that the acceleration performance of the whole vehicle is improved. At present, no patent related to control logic of the super-supercharging function of the supercharged gasoline engine exists.
Disclosure of Invention
The invention aims to provide a supercharged gasoline engine super-supercharging control method, a supercharged gasoline engine super-supercharging control system and a vehicle, which can instantly improve the output torque of an engine, thereby meeting the power requirements of the working conditions of overtaking, rapid acceleration and the like of the whole vehicle, obtaining better transient acceleration performance of the whole vehicle and improving the driving experience of a user.
In order to achieve the above purpose, the invention provides a supercharged gasoline engine super-supercharging control method, which comprises the following steps:
(S1) detecting the running boundary of the whole vehicle and the state of an accelerator pedal, wherein the state of the accelerator pedal is the state of the opening degree or the change rate of the accelerator pedal;
(S2) judging whether the running boundary of the whole vehicle and the state of an accelerator pedal meet the condition of the super-pressurization mode, if so, controlling the supercharged gasoline engine to enter the super-pressurization mode, and turning to an execution step (S3); otherwise, the supercharged gasoline engine does not enter the super-supercharged mode, and the step (S1) is executed;
(S3) continuously monitoring whether the running boundary of the whole vehicle and the state of an accelerator pedal meet the condition of the super-pressurization mode, if so, continuously running the super-pressurization mode of the supercharged gasoline engine, and turning to an execution step (S4); otherwise, controlling the supercharged gasoline engine to exit the super-supercharged mode, and turning to an execution step (S1);
(S4) judging whether the super-pressurization acting time reaches the preset super-pressurization acting time, if so, locking the super-pressurization mode, and turning to an execution step (S5); otherwise, the supercharged gasoline engine continues to run the super-supercharged mode, and returns to the execution step (S3);
(S5) judging whether the time for locking the super-pressurization mode reaches the preset locking time, if so, turning to an execution step (S1); otherwise, the super-boost mode is continued to be locked, and the step (S5) is continued to be executed.
Further, the value range of the super-pressurization action time is 15-20s, and the value range of the preset locking time is 5-10 s.
Further, the vehicle operating boundaries include intake air temperature and gear, altitude and grade of vehicle operation.
Further, the super-boost mode condition is indicated to be satisfied when the following conditions are satisfied simultaneously:
condition one: the opening of the accelerator pedal is larger than or equal to an opening threshold value;
condition II: the gradient is less than or equal to a gradient threshold value;
and (3) a third condition: the altitude is smaller than or equal to a preset altitude;
condition four: the transmission gear is not in park or reverse;
condition five: the intake air temperature is within a preset temperature range.
Further, the opening threshold value is equal to 95%.
Further, the gradient threshold value is equal to 20%.
Further, the preset altitude is equal to 2000m.
Further, the preset temperature range is [ -30, 70].
The invention also provides a super-boost control system of the boost gasoline engine, which comprises the following components:
the detection module is used for collecting signals of the running boundary of the whole vehicle and the state of the accelerator pedal;
the engine controller is used for executing corresponding logic judgment and controlling the supercharged gasoline engine to execute or exit or lock up the super-supercharged mode;
the detection module is connected with the engine controller, and the supercharged gasoline engine super-supercharging control system can be configured to execute the steps of the supercharged gasoline engine super-supercharging control method.
The invention also provides a vehicle comprising the supercharged gasoline engine super-supercharging control system.
Compared with the prior art, the invention has the following advantages:
according to the supercharged gasoline engine super-supercharging control method, the supercharged gasoline engine super-supercharging control system and the vehicle, under the condition that engine hardware is not changed, through electronic injection matching optimization, the output torque of the engine can be instantaneously improved, so that the power requirements of the working conditions such as overtaking and rapid acceleration of the whole vehicle are met, the supercharged gasoline engine can output torque larger than the steady-state external characteristic in a short time, the excellent transient acceleration performance of the whole vehicle is obtained, and the driving experience of a user is improved.
Drawings
FIG. 1 is a flow chart of the supercharged gasoline engine super-supercharging control method of the invention;
FIG. 2 is a schematic diagram of a supercharger matching the external features of a supercharged gasoline engine.
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings.
Referring to fig. 2, a region 1 is an external characteristic section of the engine at a low speed, in which an exhaust gas control valve of a general exhaust gas turbocharger is fully closed in order to obtain a higher low-end torque, and the turbocharger does not have a supercharging compensation capability; the area 2, namely a medium-high rotating speed section of the engine, is generally provided with compensation capability, so that super-pressurization can be carried out, and the rotating speed of the engine is generally 2000r/min-4000r/min; at region 3, i.e., at high engine speeds, the maximum performance potential of a typical supercharged engine has been fully released, at which time the engine torque output does not substantially increase even though the supercharger has compensation capability.
Referring to fig. 1, the embodiment discloses a super-boost control method of a boost gasoline engine, which comprises the following steps:
(S1) detecting the running boundary of the whole vehicle and the state of an accelerator pedal, wherein the state of the accelerator pedal is the state of the opening degree or the change rate of the accelerator pedal;
(S2) judging whether the running boundary of the whole vehicle and the state of an accelerator pedal meet the condition of the super-pressurization mode, if so, controlling the supercharged gasoline engine to enter the super-pressurization mode, and turning to an execution step (S3); otherwise, the supercharged gasoline engine does not enter the super-supercharged mode, and the step (S1) is executed; the supercharged gasoline engine still keeps normal running without entering the super-supercharged mode, and detects and judges whether the running boundary of the whole vehicle and the state of an accelerator pedal meet the condition of the super-supercharged mode in real time; the normal driving is based on the driver demand, and the engine provides the required power and does not drive in the super-boost mode.
(S3) continuously monitoring whether the running boundary of the whole vehicle and the state of an accelerator pedal meet the condition of the super-pressurization mode, if so, continuously running the super-pressurization mode of the supercharged gasoline engine, and turning to an execution step (S4); otherwise, controlling the supercharged gasoline engine to exit the super-supercharged mode, and turning to an execution step (S1); and controlling the supercharged gasoline engine to return to normal running after exiting the super-supercharged mode, and detecting and judging whether the running boundary of the whole vehicle and the state of an accelerator pedal meet the condition of the super-supercharged mode in real time.
(S4) judging whether the super-pressurization acting time reaches the preset super-pressurization acting time, if so, locking the super-pressurization mode, and turning to an execution step (S5); otherwise, the supercharged gasoline engine continues to run the super-supercharged mode, and returns to the execution step (S3); the engine super-boost mode can only be used in a short time, and the use frequency cannot be too frequent, so that the EMS is required to set the acting time and the locking time of the super-boost mode, and the engine is prevented from continuously working in the super-boost state.
(S5) judging whether the time for locking the super-pressurization mode reaches the preset locking time, if so, turning to an execution step (S1); otherwise, the super-boost mode is continued to be locked, and the step (S5) is continued to be executed. And when the preset locking time is reached, namely the locking time is finished, the whole vehicle can judge whether the super-boost mode is needed or not in a new round.
In this embodiment, the range of the value of the super-pressurization time is 15s-20s, and the range of the value of the preset locking time is 5s-10s. Optionally, the super-pressurization time is 20s, and the preset locking time is 10s.
In this embodiment, the vehicle operation boundary includes the intake air temperature and the gear, altitude, and gradient of the vehicle operation. When the supercharged gasoline engine capable of using the super-supercharged mode is matched with the whole vehicle, and the whole vehicle runs at a certain speed, gradient and altitude, whether the whole vehicle needs an engine to additionally increase load at the moment or not is judged through the pedal opening and the pedal change rate, so that whether the super-supercharged control logic mode needs to be entered or not is determined. The intake air temperature, the engine intake manifold temperature, is located at the throttle position.
In certain embodiments, the vehicle operating boundary further includes a vehicle operating environment temperature.
In the present embodiment, the super-boost mode condition is indicated to be satisfied when the following conditions are satisfied at the same time:
condition one: the opening of the accelerator pedal is larger than or equal to an opening threshold value;
condition II: the gradient is less than or equal to a gradient threshold value;
and (3) a third condition: the altitude is smaller than or equal to a preset altitude;
condition four: the transmission gear is not in park or reverse;
condition five: the intake air temperature is within a preset temperature range. And when the opening degree of the accelerator pedal is detected to be smaller than the opening degree threshold value, or the air inlet temperature exceeds a preset temperature range, or the running gradient of the whole vehicle is larger than the gradient threshold value, or the altitude is larger than the preset altitude, the super-pressurization mode is exited.
In this embodiment, the opening threshold is equal to 95%, the gradient threshold is equal to 20%, the preset altitude is equal to 2000m, and the preset temperature range is [ -30, 70]. In some embodiments, the preset temperature range, the opening threshold, the gradient threshold, and the preset altitude may take other values or ranges of values, which are not limited herein.
The embodiment also discloses a supercharged gasoline engine super-supercharging control system, which comprises:
the detection module is used for collecting signals of the running boundary of the whole vehicle and the state of the accelerator pedal;
an engine controller (EMS) for executing corresponding logic judgment and controlling the supercharged gasoline engine to execute or exit or lock up the super-supercharged mode;
the detection module is connected with the engine controller, and the supercharged gasoline engine super-supercharging control system can be configured to execute the steps of the supercharged gasoline engine super-supercharging control method.
The embodiment also discloses a vehicle comprising the supercharged gasoline engine super-supercharging control system.
According to the supercharged gasoline engine super-supercharging control method, the supercharged gasoline engine super-supercharging control system and the vehicle, under the condition that engine hardware is not changed, through electronic injection matching optimization, the output torque of the engine can be instantaneously improved, so that the power requirements of the working conditions such as overtaking and rapid acceleration of the whole vehicle are met, the supercharged gasoline engine can output torque larger than the steady-state external characteristic in a short time, the excellent transient acceleration performance of the whole vehicle is obtained, and the driving experience of a user is improved.
The foregoing describes in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the invention by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.
Claims (10)
1. The super-boost control method of the supercharged gasoline engine is characterized by comprising the following steps of:
(S1) detecting the running boundary of the whole vehicle and the state of an accelerator pedal, wherein the state of the accelerator pedal is the state of the opening degree or the change rate of the accelerator pedal;
(S2) judging whether the running boundary of the whole vehicle and the state of an accelerator pedal meet the condition of the super-pressurization mode, if so, controlling the supercharged gasoline engine to enter the super-pressurization mode, and turning to an execution step (S3); otherwise, the supercharged gasoline engine does not enter the super-supercharged mode, and the step (S1) is executed;
(S3) continuously monitoring whether the running boundary of the whole vehicle and the state of an accelerator pedal meet the condition of the super-pressurization mode, if so, continuously running the super-pressurization mode of the supercharged gasoline engine, and turning to an execution step (S4); otherwise, controlling the supercharged gasoline engine to exit the super-supercharged mode, and turning to an execution step (S1);
(S4) judging whether the super-pressurization acting time reaches the preset super-pressurization acting time, if so, locking the super-pressurization mode, and turning to an execution step (S5), wherein the engine cannot enter the super-pressurization mode again within the preset locking time; otherwise, the supercharged gasoline engine continues to run the super-supercharged mode, and returns to the execution step (S3);
(S5) judging whether the time for locking the super-pressurization mode reaches the preset locking time, if so, turning to an execution step (S1); otherwise, the super-boost mode is continued to be locked, and the step (S5) is continued to be executed.
2. The supercharged gasoline engine supercharged control method according to claim 1, wherein the value range of the supercharging action time is 15s-20s, and the value range of the preset locking time is 5s-10s.
3. The supercharged gasoline engine super-supercharging control method according to claim 1 or 2, wherein the whole vehicle operation boundary includes an intake air temperature and a shift position, an altitude, and a gradient of the whole vehicle operation.
4. The supercharged gasoline engine supercharging control method according to claim 3, characterized in that the condition of the supercharging mode is satisfied when the following conditions are satisfied at the same time:
condition one: the opening of the accelerator pedal is larger than or equal to an opening threshold value;
condition II: whether the gradient is less than or equal to a gradient threshold;
and (3) a third condition: the altitude is smaller than or equal to a preset altitude;
condition four: the transmission gear is not in park or reverse;
condition five: the intake air temperature is within a preset temperature range.
5. The supercharged gasoline engine supercharging control method according to claim 4, characterized in that the opening threshold value is equal to 95%.
6. The supercharged gasoline engine super-boost control method according to claim 4 or 5, characterized in that the gradient threshold value is equal to 20%.
7. The supercharged gasoline engine supercharging control method according to claim 6, wherein the preset altitude is equal to 2000m.
8. The supercharged gasoline engine super-supercharging control method according to claim 4 or 5 or 7, characterized in that the preset temperature range is [ -30, 70].
9. The super-boost control system of the supercharged gasoline engine is characterized by comprising the following components:
the detection module is used for collecting signals of the running boundary of the whole vehicle and the state of the accelerator pedal;
an engine controller (EMS) for executing corresponding logic judgment and controlling the supercharged gasoline engine to execute or exit or lock up the super-supercharged mode;
the detection module is connected with an engine controller, and the supercharged gasoline engine super-supercharging control system can be configured to execute the steps of the supercharged gasoline engine super-supercharging control method according to any one of claims 1 to 8.
10. A vehicle comprising the supercharged gasoline engine super-boost control system of claim 9.
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| CN202111665967.8A CN114320624B (en) | 2021-12-30 | 2021-12-30 | Super-boost control method and system of supercharged gasoline engine and vehicle |
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| CN202111665967.8A CN114320624B (en) | 2021-12-30 | 2021-12-30 | Super-boost control method and system of supercharged gasoline engine and vehicle |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4651561A (en) * | 1984-05-15 | 1987-03-24 | Nissan Motor Co., Ltd. | Acceleration detecting device for a turbocharger system and method of operation |
| JP2002115572A (en) * | 2000-10-10 | 2002-04-19 | Nissan Motor Co Ltd | Control device for supercharger |
| CN107013318A (en) * | 2016-01-28 | 2017-08-04 | 长城汽车股份有限公司 | Mix pressure charging system and its control method, vehicle |
| CN107013319A (en) * | 2016-01-28 | 2017-08-04 | 长城汽车股份有限公司 | Control method, system and the vehicle of Electron pressurizing unit |
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2021
- 2021-12-30 CN CN202111665967.8A patent/CN114320624B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4651561A (en) * | 1984-05-15 | 1987-03-24 | Nissan Motor Co., Ltd. | Acceleration detecting device for a turbocharger system and method of operation |
| JP2002115572A (en) * | 2000-10-10 | 2002-04-19 | Nissan Motor Co Ltd | Control device for supercharger |
| CN107013318A (en) * | 2016-01-28 | 2017-08-04 | 长城汽车股份有限公司 | Mix pressure charging system and its control method, vehicle |
| CN107013319A (en) * | 2016-01-28 | 2017-08-04 | 长城汽车股份有限公司 | Control method, system and the vehicle of Electron pressurizing unit |
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