Methanol engine starting autonomous control method and system, vehicle and storage medium

Abstract

The invention provides a methanol engine starting autonomous control method and system, a vehicle and a storage medium, and the method comprises the following steps: 1) when a vehicle body master controller detects a key power-on signal, detecting whether a starting signal exists at the same time, if so, entering a step 2, and if not, entering a step 3; (2) the vehicle body master controller generates a signal indicating that the starting process is wrong so as to prompt an operator that the operator needs to be powered off and powered on again; the step 1 is executed repeatedly when the key is powered on again; (3) the vehicle body master control starts a whole vehicle self-checking program, and the engine ECU starts an engine preheating program; and (4) after the engine preheating program is completed, the vehicle body master controller generates an engine preheating completion signal to prompt a user to start the engine.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical production equipment, and more specifically, to a dry ice production feeding structure and a dry ice production equipment. Background Art

[0002] Compared with the traditional diesel engine that compresses air, injects fuel for atomization, ignites the mixed gas with a spark plug, and rotates the crankshaft, and the starting motor drives the flywheel to start the engine. During the engine starting process, for a methanol engine, it must first be started by a low-voltage electric motor oil pump, then the methanol pump is started, and after the glow plug is heated, the engine is started by methanol compression ignition. For the electrical system, after the traditional diesel engine receives the key power-on and start signals, it can start directly without waiting. Due to the special nature of its fuel, the methanol engine must wait until the low-voltage electric motor oil pump starts, the methanol pump starts, and the glow plug heating is completed in sequence before it can start. Due to the operating habit formed by drivers in gasoline vehicles, they often start the engine when the vehicle is powered on. This operating habit is fine for gasoline vehicles, but when the methanol engine receives the key power-on and start signals simultaneously, the starting motor starts, but since the previous starting preparation work process has not been completed in sequence, the engine cannot start all the time, resulting in battery discharge, difficult secondary starting, and even the starting motor being damaged and unable to start. Summary of the Invention

[0003] The main technical problem to be solved by the present invention is to provide a self-control method for starting a methanol engine to avoid the situation where the user fails to start the methanol engine due to operating habits.

[0004] To solve the above technical problems, the present invention provides a self-control method for starting a methanol engine, including the following steps:

[0005] 1) When the body main control detects the key power-on signal, it detects whether there is a start signal at the same time. If so, it enters step 2; if not, it enters step 3;

[0006] 2) The body main control generates a signal indicating an error in the start process to prompt the operator to power off and power on again; and when the key is powered on again, step 1 is repeated;

[0007] 3) The body main control starts the vehicle self-check program, and the engine ECU starts the engine preheating program;

[0008] 4) When the engine preheating program is completed, the body main control generates a signal indicating that the engine preheating is completed to prompt the user to start the engine.

[0009] In a preferred embodiment: In step 2, the body main control generating a signal indicating an error in the start process specifically means that the body main control sends a message indicating an error in the start process to the vehicle instrument through the CAN bus.

[0010] In a preferred embodiment, when the engine ECU starts the engine preheating program, it sends a preheating message to the body main controller; the body main controller sends a message of "Do not start while the engine is starting to preheat" to the vehicle instrument through the CAN bus.

[0011] In a preferred embodiment, after the engine oil pump and methanol fuel pump in step 4 are started successfully, the engine ECU sends a start message to the body main controller; the body main controller sends a message of "Preheating completed, can start" to the vehicle instrument through the CAN bus.

[0012] In a preferred embodiment, the engine preheating program in step 3 includes glow plug heating, oil pump start, and fuel pump start; if any one of the glow plug, oil pump, and fuel pump has an abnormality, the engine ECU sends a message of "Engine failure, start prohibited" to the vehicle instrument.

[0013] In a preferred embodiment, it further includes step 5:

[0014] 5) After the body main controller detects the start signal, it controls the start relay to close, the body main controller sends a start signal to the engine ECU, and the engine ECU enters the start program.

[0015] In a preferred embodiment, it further includes step 6:

[0016] 6) When the body main controller monitors that the engine speed is greater than 900 rpm and the oil pressure is greater than 0.06 MPa, the body main controller controls the start relay to disconnect, and the starter motor disengages; and sends a message of "Engine start completed" to the vehicle instrument through the CAN bus.

[0017] The present invention also provides a storage medium storing a software program corresponding to the control method described above.

[0018] The present invention also provides a methanol engine start independent control system storing a software program corresponding to the control method described above.

[0019] The present invention also provides a vehicle using the control system described above.

[0020] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0021] The present invention provides a method for autonomous control of methanol engine starting, which uses automated control through mutual communication among the vehicle body main controller, the engine ECU, and the vehicle instrument to ensure that each step in the engine starting process can be monitored and automatically controlled. If any link in the middle goes wrong, a fault message can be fed back to the vehicle instrument, and the vehicle instrument can inform the operator of which link and which step is incorrect. Due to the special working characteristics of the methanol fuel engine, the entire starting process must be closely linked to prevent starting process errors caused by human factors, such as the starting motor being dragged for a long time and unable to disengage, battery power shortage causing difficulties in secondary starting, and damage to the starting motor. Therefore, it is necessary to design a method for automatic control of starting and motor disengagement, and each step can be monitored and fed back to form a closed-loop control. Brief Description of the Drawings

[0022] Figure 1 It is a starting flow chart of a preferred embodiment of the present invention. Detailed Embodiments

[0023] In order to make the technical solutions and features of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and specific examples. It should be understood that these examples are only used to illustrate the present invention and not to limit the scope of the present invention. After reading the present invention, various equivalent modifications made by those skilled in the art to the present invention fall within the scope defined by the appended claims of this application.

[0024] Refer to Figure 1, this embodiment provides a self - control method for starting a methanol engine. Through mutual communication and monitoring between the vehicle body main control and the engine ECU for self - control, when the vehicle body main control detects that the key is powered on and started simultaneously, the current start control program is not entered. After the second power - off and power - on, the start process is entered again. The vehicle body main control monitors the self - check of the engine ECU to determine whether there are abnormal faults. If there is an engine fault, a fault message is sent to the instrument to display a serious engine fault, and the start is terminated. When the engine ECU detects that the key is powered on and started simultaneously, the engine does not enter the start program for the current time. At the same time, the engine sends a fault message to be displayed on the instrument. After the second start cycle and when the start process is met, the engine ECU automatically clears the start fault message and enters the start program detection. The low - pressure motor oil pump is started, the methanol pump is started, and the glow plug is heated in sequence. At the same time, the engine notifies the vehicle body main control of each completed action instruction. The vehicle body main control sends status feedback messages to the instrument, and the instrument displays each status information to the operator. When all processes run normally and error - free, the instrument displays that the engine pre - heating is all completed and can be started. The operator starts the engine. After the engine starts successfully, when the vehicle body main control detects that the engine speed exceeds 900 rpm and the engine oil pressure is greater than 0.06 MPa, the vehicle body main control automatically disconnects the start relay signal, and the starter motor loses power and disengages automatically. After completing this series of actions, the vehicle body main control sends a start - completed message to the instrument. After receiving the message information, the main interface of the instrument displays that the start has been completed. After 3 seconds, the instrument automatically exits the start information feedback interface and returns to the normal state of the main interface.

[0025] Specifically, it includes the following steps:

[0026] 1) When the vehicle body main control detects the key power - on signal, it checks whether there is a start signal at the same time. If so, the driver operates improperly and starts the engine before the engine has completed self - check and pre - heating. Proceed to step 2. If not, it indicates that the driver operates correctly, and proceed to step 3;

[0027] 2) The vehicle body main control generates a signal of incorrect start process to prompt the operator to power off and power on again; and repeats step 1 when the key is powered on again. Specifically, the vehicle body main control sends a message of incorrect start process to the vehicle instrument through the CAN bus. Repeating step 1 is to avoid improper operation by the operator when powering on again, ensuring that the operator can only perform subsequent steps when the power is on and the engine is not started.

[0028] 3) The vehicle body main control starts the vehicle self-check program, and the engine ECU starts the engine self-check and engine preheating program; if the engine ECU detects a fault in the engine during the engine self-check process, it sends a message of engine fault to the vehicle body main control and then to the vehicle instrument. The engine preheating program includes glow plug heating, oil pump startup, and fuel pump startup; if any one of the glow plug, oil pump, and fuel pump malfunctions, the engine ECU sends a message of engine fault and prohibits startup to the vehicle instrument.

[0029] Moreover, during the engine preheating process, the engine ECU sends a message of "engine preheating, do not start" to the vehicle instrument to prevent the driver from starting the vehicle during engine preheating.

[0030] 4) When the engine preheating program is completed, the vehicle body main control generates a signal indicating that the engine preheating is completed to prompt the user to start the engine. That is, when the engine oil pump and methanol fuel pump startup are completed, the engine ECU sends a startup message to the vehicle body main control; the vehicle body main control sends a message of "preheating completed, can start" to the vehicle instrument via the CAN bus.

[0031] 5) After the vehicle body main control detects the startup signal, it controls the startup relay to close, and the vehicle body main control sends a startup signal to the engine ECU, and the engine ECU enters the startup program.

[0032] 6) When the vehicle body main control monitors that the engine speed is greater than 900 rpm and the oil pressure is greater than 0.06 MPa, the vehicle body main control controls the startup relay to disconnect, and the starter motor disengages; and sends a message of "engine startup completed" to the vehicle instrument via the CAN bus.

[0033] The above startup process can be stored in a storage medium in the form of code, thus producing a methanol engine startup autonomous control system for vehicles using methanol engines.

[0034] The above is only a specific embodiment of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantive modification made to the present invention using this concept belongs to the act of infringing the protection scope of the present invention.

Claims

1. A method for autonomous control of methanol engine starting, characterized in that It includes the following steps: 1) When the body main control detects the key power-on signal, it detects whether there is a start signal at the same time. If so, it enters step 2; if not, it enters step 3; 2) The body main control generates a signal indicating an error in the start process to prompt the operator to power off and power on again; and repeats step 1 when the key is powered on again; 3) The body main control starts the vehicle self-check program, and the engine ECU starts the engine preheating program; 4) When the engine preheating program is completed, the body main control generates a signal indicating that the engine preheating is completed to prompt the user to start the engine.

2. The methanol engine starting autonomous control method according to claim 1, characterized in that: In step 2, the body main control generating a signal indicating an error in the start process specifically means that the body main control sends a message indicating an error in the start process to the vehicle instrument through the CAN bus.

3. The methanol engine starting independent control method according to claim 1, characterized in that: When the engine ECU starts the engine preheating program, it sends a preheating message to the body main control; the body main control sends a message saying "Do not start while the engine is preheating" to the vehicle instrument through the CAN bus.

4. The methanol engine starting independent control method according to claim 1, characterized in that: In step 4, after the engine oil pump and methanol fuel pump start successfully, the engine ECU sends a start message to the body main control; the body main control sends a message saying "Preheating completed, can start" to the vehicle instrument through the CAN bus.

5. The methanol engine starting autonomous control method according to claim 1, characterized in that: In the engine preheating program in step 3, it includes glow plug heating, oil pump start, and fuel pump start; if any one of the glow plug, oil pump, and fuel pump has an abnormality, the engine ECU sends a message saying "Engine fault, start prohibited" to the vehicle instrument.

6. The methanol engine starting independent control method according to claim 1, characterized in that: It also includes step 5: 5) After the body main control detects the start signal, it controls the start relay to close, the body main control sends a start signal to the engine ECU, and the engine ECU enters the start program.

7. The methanol engine starting independent control method according to claim 6, wherein: It also includes step 6: 6) When the body main control monitors that the engine speed is greater than 900 rpm and the oil pressure is greater than 0.06 MPa, the body main control controls the start relay to disconnect and the starter motor disengages; and sends a message saying "Engine start completed" to the vehicle instrument through the CAN bus.

8. Storage medium, characterized in that: It stores the software program corresponding to the control method described in any one of claims 1-7.

9. The methanol engine starting independent control system is characterized in that: It stores the software program corresponding to the control method described in any one of claims 1-7.

10. A vehicle, characterized in that It uses the control system described in claim 9.

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