CN-122009144-A - Combined control method and system for plug-in hybrid electric vehicle and electronic equipment

CN122009144ACN 122009144 ACN122009144 ACN 122009144ACN-122009144-A

Abstract

The application provides a combined control method, a system and electronic equipment of a plug-in hybrid electric vehicle, and relates to the technical field of power control of new energy vehicles, wherein the method comprises the steps of monitoring whether the vehicle is in a large-load demand working condition; the method comprises the steps of obtaining engine temperature information of a vehicle when the vehicle is in a large-load demand working condition, controlling a power system of the vehicle to enter a series driving mode and monitoring a warmup state of the engine if the engine is judged to be in a cold starting state according to the engine temperature information, and controlling the power system to be switched to a parallel driving mode when the warmup state meets a preset warmup completion condition so that the engine directly participates in driving wheels. According to the application, through carrying out the series mode control of the warm-up priority of the cold start engine under the working condition of large load demand, the emission compliance and the service life of the engine are ensured, and the power demand and the energy efficiency are also considered.

Inventors

ZHAO YA
ZHANG FAN
CHEN CHANGSHENG
WANG XIAO

Assignees

奇瑞汽车股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260331

Claims (10)

1. The combined control method of the plug-in hybrid electric vehicle is characterized by comprising the following steps of: monitoring whether the vehicle is in a large load demand working condition; When the vehicle is in a large-load demand working condition, acquiring engine temperature information of the vehicle; If the engine is judged to be in a cold start state according to the engine temperature information, controlling a power system of the vehicle to enter a series driving mode and monitoring a warmup state of the engine, wherein in the series driving mode, the engine runs in a preset high-efficiency warmup region to drive a generator to generate electricity, and the generated electricity and a power battery supply power for a driving motor together so as to meet the power requirement of a wheel end; and when the warmup state meets the preset warmup completion condition, controlling the power system to switch to a parallel driving mode so that the engine directly participates in driving wheels.
2. The method of claim 1, wherein monitoring whether the vehicle is in a heavy load demand condition comprises: collecting running state parameters of the vehicle, wherein the running state parameters comprise at least one of running speed of the vehicle, power required by a driver, battery charge state and engine state; and determining whether the vehicle is in a large-load demand working condition according to the running state parameters.
3. The method of claim 2, wherein the operating state parameters include vehicle travel speed, driver demand power, and battery state of charge, and wherein determining whether the vehicle is in a heavy load demand condition comprises: And if the running speed of the vehicle is greater than a preset speed threshold value and the driver required power is greater than the sum of the maximum external characteristic power of the driving motor at the current rotating speed and the available power of the power battery, judging that the vehicle is in a large-load required working condition.
4. The method of claim 1, wherein the engine temperature information includes at least one of an engine coolant temperature, an engine oil temperature, and an intake air temperature, and wherein the engine is determined to be cold-start when the engine temperature information is below a respective predetermined cold-start temperature threshold.
5. The method of claim 1, wherein the efficient warm-up interval refers to a preset speed and load operating interval that targets a preferential increase in engine coolant temperature and exhaust temperature.
6. The method of claim 1, wherein prior to determining whether the engine is cold start based on the engine temperature information, the method further comprises determining the efficient warm-up interval based on at least one of an ambient temperature, a warm-up schedule, and a battery state of charge.
7. The method according to claim 1, wherein the warmup state includes at least one of an engine coolant temperature, an engine oil temperature, and a three-way catalyst support temperature, and the warmup completion condition is that at least one of the following conditions is satisfied: The engine coolant temperature is greater than or equal to a first temperature threshold; the engine oil temperature is greater than or equal to a second temperature threshold; the temperature of the three-way catalyst carrier is larger than or equal to the preset effective ignition temperature.
8. A combination control system for a plug-in hybrid vehicle, the system comprising: the working condition monitoring module is used for monitoring whether the vehicle is in a large-load demand working condition or not; The information acquisition module is used for acquiring the engine temperature information of the vehicle when the vehicle is in a large-load demand working condition; The cold start judging module is used for judging whether the engine is in a cold start state according to the engine temperature information; the system comprises a mode management module, a power system control module and a power battery, wherein the mode management module is used for controlling a power system of a vehicle to enter a series driving mode and monitoring the warmup state of the engine if the engine is in a cold starting state, and the engine runs in a preset high-efficiency warmup region in the series driving mode to drive a generator to generate power, and the generated power and the power battery supply power for a driving motor together so as to meet the power requirement of a wheel end; The mode management module is further configured to control the power system to switch to a parallel driving mode when the warmup state satisfies a preset warmup completion condition, so that the engine directly participates in driving the vehicle.
9. An electronic device comprising a processor and a memory, the memory storing computer-executable instructions executable by the processor, the processor executing the computer-executable instructions to implement the method of any one of claims 1 to 7.
10. A computer readable storage medium storing computer executable instructions which, when invoked and executed by a processor, cause the processor to implement the method of any one of claims 1 to 7.

Description

Combined control method and system for plug-in hybrid electric vehicle and electronic equipment Technical Field The invention relates to the technical field of power control of new energy automobiles, in particular to a combined control method, a system and electronic equipment of a plug-in hybrid electric automobile. Background A power system of a plug-in hybrid electric vehicle generally includes an engine and a driving motor, and a plurality of operation modes, such as a pure electric mode, a serial driving mode, a parallel driving mode, and the like, are realized through the cooperation of the engine and the driving motor. In the parallel driving mode, the engine and the driving motor can jointly output torque to meet the driving requirement of the wheel end, and the mode is particularly suitable for scenes with high requirements on the efficiency of a power system, such as high-speed cruising of a vehicle. However, existing control strategies have limitations in addressing certain specific conditions. For example, when a vehicle is subjected to a heavy load demand such as a sudden acceleration overtaking or a continuous climbing during high-speed running, and the state of charge of the power battery is low or the required power exceeds the individual supply capacity of the motor, the engine needs to be started for intervention driving. Under such a scenario, if a high load is directly applied when the engine is in a cold state, the exhaust emissions will be out of standard, and the service life of the engine will be significantly shortened. Therefore, how to reasonably plan the intervention time and the working mode of the engine under the working condition of large load demand so as to consider the emission compliance and the durability of the engine is a technical problem to be solved urgently by those skilled in the art. Disclosure of Invention In view of the above, the invention aims to provide a combined control method, a system and electronic equipment of a plug-in hybrid electric vehicle, so as to solve the technical problems that the cold start emission of an engine exceeds the standard and the reliability and the service life of the existing vehicle are reduced under the working condition of large load demand. In a first aspect, an embodiment of the present invention provides a method for jointly controlling a plug-in hybrid electric vehicle, where the method includes: monitoring whether the vehicle is in a large load demand working condition; When the vehicle is in a large-load demand working condition, acquiring engine temperature information of the vehicle; If the engine is judged to be in a cold start state according to the engine temperature information, controlling a power system of the vehicle to enter a series driving mode and monitoring a warmup state of the engine, wherein in the series driving mode, the engine runs in a preset high-efficiency warmup region to drive a generator to generate electricity, and the generated electricity and a power battery supply power for a driving motor together so as to meet the power requirement of a wheel end; and when the warmup state meets the preset warmup completion condition, controlling the power system to switch to a parallel driving mode so that the engine directly participates in driving wheels. In one embodiment, the monitoring of whether the vehicle is in a heavy load demand condition includes collecting operating state parameters of the vehicle and determining whether the vehicle is in a heavy load demand condition according to the operating state parameters. In one embodiment, the operating state parameters include at least one of vehicle travel speed, driver demand power, battery state of charge, and engine state. In one embodiment, the running state parameters comprise a running speed of the vehicle, a driver required power and a battery state of charge, and the determining whether the vehicle is in a large load required working condition comprises determining that the vehicle is in a large load required working condition if the running speed of the vehicle is greater than a preset speed threshold and the driver required power is greater than the sum of the maximum external characteristic power of the driving motor at the current rotating speed and the available power of the power battery. In one embodiment, the monitoring of whether the vehicle is in a heavy load demand condition is further based on at least one of road grade information, vehicle acceleration rate of change, and driver operating mode switch state. In one embodiment, the high load demand condition further includes a battery state of charge below a preset low battery threshold and driver demand power exceeding an upper power limit of an efficient engine operating region. In one embodiment, the engine temperature information comprises at least one of engine coolant temperature, engine oil temperature and intake air temperature, and when the engine temperature information