CN-121993304-A - Cold start control method and system of methanol engine and vehicle

CN121993304ACN 121993304 ACN121993304 ACN 121993304ACN-121993304-A

Abstract

The invention discloses a cold start control method and system of a methanol engine and a vehicle. The cold start control method of the methanol engine comprises the steps of obtaining the ambient temperature, outputting starting information of a gasoline supply unit according to the ambient temperature, starting the gasoline supply unit according to the starting information of the gasoline supply unit, collecting the working accumulation time of the gasoline supply unit, obtaining a gasoline rail pressure value, determining the working state of the gasoline supply unit according to the gasoline rail pressure value and the working accumulation time, and carrying out cold start of the methanol engine according to the working state. The success rate of cold start is improved by determining the operating state of the gasoline supply unit.

Inventors

LI ZHIJIE
SHI XIANGDONG
ZENG XIAOXIAO
LI LUN
WU XINBO

Assignees

潍柴动力股份有限公司

Dates

Publication Date: 20260508
Application Date: 20260318

Claims (10)

1. A cold start control method of a methanol engine, characterized by comprising: Acquiring an ambient temperature; Outputting starting information of the gasoline supply unit according to the ambient temperature; starting a gasoline supply unit according to the starting information of the gasoline supply unit, and collecting the working accumulation time of the gasoline supply unit; acquiring a gasoline rail pressure value; Determining an operating state of the gasoline supply unit according to the gasoline rail pressure value and the operating accumulation time; And performing cold start of the methanol engine according to the working state.
2. The cold start control method of a methanol engine according to claim 1, wherein outputting gasoline supply unit start information according to the ambient temperature includes: acquiring a preset temperature; And outputting gasoline supply start information when the ambient temperature is less than or equal to the preset temperature.
3. The method for controlling cold start of a methanol engine according to claim 1, further comprising, before determining an operating state of the gasoline supply unit based on the gasoline rail pressure value and the operation accumulation time: acquiring a preset work accumulation time; Acquiring a first preset gasoline rail pressure value and a second preset gasoline rail pressure value, wherein the first preset gasoline rail pressure value is smaller than the second preset gasoline rail pressure value.
4. The cold start control method of a methanol engine according to claim 3, wherein the operation state of the gasoline supply unit includes a normal operation state and an abnormal operation state; determining an operating state of the gasoline supply unit according to the gasoline rail pressure value and the operating accumulation time, including: And when the working accumulation time is greater than or equal to the preset working accumulation time, the gasoline rail pressure value is greater than or equal to the first preset gasoline rail pressure value and the gasoline rail pressure value is less than or equal to the second preset gasoline rail pressure value, determining that the gasoline supply unit is in a normal working state.
5. The cold start control method of a methanol engine according to claim 4, further comprising: And when the working accumulation time is smaller than the preset working accumulation time, or the gasoline rail pressure value is smaller than the first preset gasoline rail pressure value, or the gasoline rail pressure value is larger than the second preset gasoline rail pressure value, determining that the gasoline supply unit is in an abnormal working state.
6. The method for controlling cold start of a methanol engine according to claim 5, further comprising, after determining that the gasoline supply unit is in an abnormal operation state: Stopping the start of the gasoline supply unit.
7. The method for controlling cold start of a methanol engine according to claim 6, further comprising, after stopping the start of the gasoline supply unit: acquiring strong refrigeration starting information; and carrying out cold start of the methanol engine according to the forced cold start information.
8. The method for controlling cold start of a methanol engine according to claim 6, further comprising, after stopping the start of the gasoline supply unit: and outputting abnormal reminding information of the gasoline supply unit.
9. A cold start control system of a methanol engine, comprising the cold start control method of a methanol engine according to any one of claims 1 to 8, the cold start control system of a methanol engine comprising: The environment temperature acquisition module is used for acquiring the environment temperature; the gasoline supply unit starting information output module is used for outputting gasoline supply unit starting information according to the ambient temperature; The working accumulation time acquisition module of the gasoline supply unit is used for starting the gasoline supply unit according to the starting information of the gasoline supply unit and acquiring the working accumulation time of the gasoline supply unit; the gasoline rail pressure value acquisition module is used for acquiring a gasoline rail pressure value; the working state determining module of the gasoline supply unit is used for determining the working state of the gasoline supply unit according to the gasoline rail pressure value and the working accumulation time; and the cold start module of the methanol engine is used for carrying out cold start of the methanol engine according to the working state.
10. A vehicle characterized in that it comprises the cold start control system of a methanol engine as claimed in claim 9.

Description

Cold start control method and system of methanol engine and vehicle Technical Field The invention relates to the technical field of vehicles, in particular to a cold start control method and system of a methanol engine and a vehicle. Background The methanol has large vaporization latent heat and poor evaporation property at low temperature, so that the concentration of the combustible mixed gas is difficult to reach the ignition limit, and the low-temperature cold start of the methanol engine is difficult. Methanol engines require auxiliary starting with gasoline fuel at lower ambient temperatures. However, the gasoline supply system sometimes fails to operate properly due to various factors, resulting in failure to inject gasoline properly during the start-up process and failure of engine start-up. Therefore, how to determine whether the gasoline supply system is normal becomes an important condition for ensuring a low-temperature cold start of the methanol engine. Disclosure of Invention The invention provides a cold start control method and system of a methanol engine and a vehicle, so as to improve the success rate of cold start. In a first aspect, the present invention provides a cold start control method for a methanol engine, including: Acquiring an ambient temperature; Outputting starting information of the gasoline supply unit according to the ambient temperature; starting a gasoline supply unit according to the starting information of the gasoline supply unit, and collecting the working accumulation time of the gasoline supply unit; acquiring a gasoline rail pressure value; Determining an operating state of the gasoline supply unit according to the gasoline rail pressure value and the operating accumulation time; And performing cold start of the methanol engine according to the working state. Optionally, outputting the starting information of the gasoline supply unit according to the ambient temperature, including: acquiring a preset temperature; And outputting gasoline supply start information when the ambient temperature is less than or equal to the preset temperature. Optionally, before determining the working state of the gasoline supply unit according to the gasoline rail pressure value and the working accumulation time, the method further comprises the steps of obtaining a preset working accumulation time; Acquiring a first preset gasoline rail pressure value and a second preset gasoline rail pressure value, wherein the first preset gasoline rail pressure value is smaller than the second preset gasoline rail pressure value. Optionally, the working state of the gasoline supply unit includes a normal working state and an abnormal working state; determining an operating state of the gasoline supply unit according to the gasoline rail pressure value and the operating accumulation time, including: And when the working accumulation time is greater than or equal to the preset working accumulation time, the gasoline rail pressure value is greater than or equal to the first preset gasoline rail pressure value and the gasoline rail pressure value is less than or equal to the second preset gasoline rail pressure value, determining that the gasoline supply unit is in a normal working state. Optionally, the method further comprises: And when the working accumulation time is smaller than the preset working accumulation time, or the gasoline rail pressure value is smaller than the first preset gasoline rail pressure value, or the gasoline rail pressure value is larger than the second preset gasoline rail pressure value, determining that the gasoline supply unit is in an abnormal working state. Optionally, after determining that the gasoline supply unit is in the abnormal working state, the method further includes: Stopping the start of the gasoline supply unit. Optionally, after stopping the starting of the gasoline supply unit, the method further comprises: acquiring strong refrigeration starting information; and carrying out cold start of the methanol engine according to the forced cold start information. Optionally, after stopping the starting of the gasoline supply unit, the method further comprises: and outputting abnormal reminding information of the gasoline supply unit. In a second aspect, the present invention provides a cold start control system of a methanol engine, including the cold start control method of a methanol engine according to any one of the first aspects, the cold start control system of a methanol engine including: The environment temperature acquisition module is used for acquiring the environment temperature; the gasoline supply unit starting information output module is used for outputting gasoline supply unit starting information according to the ambient temperature; The working accumulation time acquisition module of the gasoline supply unit is used for starting the gasoline supply unit according to the starting information of the gasoline supply unit and acquiring the working