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CN-121976887-A - Control system, method and device for natural gas engine of vehicle

CN121976887ACN 121976887 ACN121976887 ACN 121976887ACN-121976887-A

Abstract

The application relates to the technical field of engines, in particular to a control system, a control method and a control device of a natural gas engine of a vehicle. The air conditioner comprises a throttle opening sensor, an engine controller and an air release valve, wherein the throttle opening sensor is used for detecting the opening of a throttle valve and generating an opening signal representing the opening of the throttle valve, the engine controller is used for generating a control signal for controlling the opening and closing states of the air release valve according to the opening signal and sending the control signal to the air release valve, and the air release valve is used for adjusting the opening and closing states according to the control signal so as to discharge high-pressure air in an intercooler. According to the application, the air release valve is connected between the intercooler and the engine controller, the throttle opening sensor is arranged on the throttle valve to detect the opening of the throttle valve to obtain the opening signal, the engine controller generates the control signal according to the opening signal to control the opening and closing state of the air release valve, and the high-pressure air retained in the intercooler is timely discharged, so that the surge of the supercharger is avoided, and the low-temperature starting performance and the running stability of the engine are ensured.

Inventors

  • SONG JIANCAI

Assignees

  • 北京福田康明斯发动机有限公司

Dates

Publication Date
20260505
Application Date
20260317

Claims (10)

  1. 1. A control system of a natural gas engine of a vehicle is characterized by comprising an intercooler, a bleed valve, an engine controller and a throttle valve, wherein a throttle valve opening sensor is arranged on the throttle valve, a first end of the bleed valve is connected with the intercooler, and a second end of the bleed valve is connected with the engine controller, and the control system comprises the following components: The throttle opening sensor is used for detecting the opening of the throttle and generating an opening signal representing the opening of the throttle; the engine controller is used for generating a control signal for controlling the opening and closing states of the air release valve according to the opening signal and sending the control signal to the air release valve; And the air release valve is used for adjusting the on-off state according to the control signal so as to discharge the high-pressure air in the intercooler.
  2. 2. The system of claim 1, wherein the bleed valve is located at a bottom of the intercooler.
  3. 3. The system of claim 1, wherein if the opening of the throttle valve is zero, the engine controller is specifically configured to: Generating an opening control signal for controlling the opening of the air release valve, and sending the opening control signal to the air release valve; the air release valve is specifically used for adjusting the on-off state according to the control signal: and adjusting the switch state to be on according to the on control signal so as to enable the intercooler to discharge high-pressure air.
  4. 4. A system according to any one of claims 1 to 3, further comprising an engine, a first end of the throttle being connected to the intercooler and a second end of the throttle being connected to the engine, the engine controller being adapted to, if the opening of the throttle is greater than zero: generating a closing control signal for controlling the closing of the air release valve, and sending the closing control signal to the air release valve; the air release valve is specifically used for adjusting the on-off state according to the control signal: And adjusting the switch state to be closed according to the closing control signal so that high-pressure air in the intercooler enters the engine through the throttle valve.
  5. 5. The control method of the vehicle natural gas engine is characterized by being applied to an engine controller in a control system of the vehicle natural gas engine, the system further comprises an intercooler, a bleed valve and a throttle valve, a throttle opening sensor is arranged on the throttle valve, a first end of the bleed valve is connected with the intercooler, and a second end of the bleed valve is connected with the engine controller, and the method comprises the following steps: generating a control signal for controlling the opening and closing states of the air release valve according to an opening signal, and sending the control signal to the air release valve so that the air release valve can adjust the opening and closing states according to the control signal to discharge high-pressure air in the intercooler, wherein the opening signal is obtained by detecting the opening of the throttle valve by the throttle valve opening sensor, and the opening signal is used for representing the opening of the throttle valve.
  6. 6. The method according to claim 5, wherein if the opening of the throttle valve is zero, the generating a control signal for controlling the opening and closing state of the purge valve according to the opening signal specifically includes: Generating an opening control signal for controlling the opening of the air release valve, and sending the opening control signal to the air release valve so that the air release valve can adjust the opening and closing state to be opened according to the opening control signal.
  7. 7. The method according to claim 5 or 6, wherein if the opening of the throttle valve is greater than zero, the generating a control signal for controlling the on-off state of the purge valve according to the opening signal specifically includes: and generating a closing control signal for controlling the closing of the air release valve, and sending the closing control signal to the air release valve so that the air release valve adjusts the on-off state to be closed according to the closing control signal.
  8. 8. The control device of the vehicle natural gas engine is characterized by being applied to an engine controller in a control system of the vehicle natural gas engine, and further comprising an intercooler, a bleed valve and a throttle valve, wherein a throttle opening sensor is arranged on the throttle valve, a first end of the bleed valve is connected with the intercooler, a second end of the bleed valve is connected with the engine controller, the intercooler is used for supplying high-pressure air to the engine when the engine is running, and the device comprises: a processing unit configured to generate a control signal for controlling a switching state of the purge valve according to an opening signal, wherein the opening signal is obtained by detecting an opening of the throttle valve by the throttle valve opening sensor, and the opening signal is used for characterizing the throttle valve opening; And the receiving and transmitting unit is used for transmitting the control signal to the air release valve so that the air release valve can adjust the on-off state according to the control signal to discharge the high-pressure air in the intercooler.
  9. 9. A computer readable storage medium, characterized in that it comprises a computer program for causing an electronic device to perform the steps of the method of any of claims 5 to 7 when said computer program is run on the electronic device.
  10. 10. A computer program product comprising a computer program stored in a computer readable storage medium, which when read from the computer readable storage medium by a processor of an electronic device, causes the electronic device to perform the steps of the method according to any one of claims 5 to 7.

Description

Control system, method and device for natural gas engine of vehicle Technical Field The application relates to the technical field of engines, in particular to a control system, a control method and a control device of a natural gas engine of a vehicle. Background The existing natural gas engine adopts a mode of adjusting air inflow through a throttle valve, when the throttle valve is closed, pressurized air is blocked in an intercooler to form high-pressure air retention, on one hand, the surge of the supercharger is easy to cause, on the other hand, the accumulated water in the intercooler is frozen, and the engine is difficult to start. Disclosure of Invention The embodiment of the application provides a control system, a control method and a control device of a natural gas engine of a vehicle, which are used for controlling the on-off state of a bleed valve according to a throttle opening signal, timely discharging high-pressure air retained in an intercooler, avoiding surge of a supercharger, and further guaranteeing low-temperature starting performance and running stability of the engine. In a first aspect, an embodiment of the present application provides a control system for a natural gas engine of a vehicle, where the system includes an intercooler, a bleed valve, an engine controller, and a throttle valve, a throttle opening sensor is disposed on the throttle valve, a first end of the bleed valve is connected with the intercooler, and a second end of the bleed valve is connected with the engine controller, where: a throttle opening sensor for detecting an opening of a throttle valve and generating an opening signal indicative of the throttle opening; The engine controller is used for generating a control signal for controlling the opening and closing states of the air release valve according to the opening signal and sending the control signal to the air release valve; And the air release valve is used for adjusting the on-off state according to the control signal so as to discharge high-pressure air in the intercooler. Optionally, the above bleed valve is located at the bottom of the intercooler. Optionally, if the opening of the throttle valve is zero, the engine controller is specifically configured to: generating an opening control signal for controlling the opening of the air release valve, and sending the opening control signal to the air release valve; The air release valve is specifically used for adjusting the on-off state according to the control signal: and adjusting the switch state to be on according to the on control signal so as to enable the intercooler to discharge high-pressure air. Optionally, the control system of the vehicle natural gas engine further comprises an engine, wherein the first end of the throttle valve is connected with the intercooler, the second end of the throttle valve is connected with the engine, and if the opening of the throttle valve is larger than zero, the engine controller is specifically used for: generating a closing control signal for controlling the air release valve to be closed, and sending the closing control signal to the air release valve; The air release valve is specifically used for adjusting the on-off state according to the control signal: and adjusting the switch state to be closed according to the closing control signal so that high-pressure air in the intercooler enters the engine through the throttle valve. In a second aspect, an embodiment of the present application provides a control method of a vehicle natural gas engine, applied to an engine controller in a control system of the vehicle natural gas engine, where the control system of the vehicle natural gas engine further includes an intercooler, a bleed valve, and a throttle valve, the throttle valve is provided with a throttle opening sensor, a first end of the bleed valve is connected with the intercooler, and a second end of the bleed valve is connected with the engine controller, and the method includes: and generating a control signal for controlling the opening and closing states of the air release valve according to the opening signal, and sending the control signal to the air release valve so that the air release valve can adjust the opening and closing states according to the control signal to discharge high-pressure air in the intercooler, wherein the opening signal is obtained by detecting the opening of the throttle valve by the throttle valve opening sensor, and the opening signal is used for representing the opening of the throttle valve. According to the method, the on-off state of the air release valve is controlled according to the throttle opening signal, high-pressure air retained in the intercooler can be timely discharged, surge of the supercharger is avoided, condensation ponding and icing risks in the intercooler are reduced, and therefore low-temperature starting performance and running stability of the engine are guaranteed. Optionally, an air release val