Hybrid electric vehicle and engine start-stop control method and device thereof

An engine start-stop control method for a hybrid electric vehicle, applied to an engine start-stop control device for a hybrid electric vehicle, wherein:

• the engine start-stop control device for the hybrid electric vehicle comprises a memory and a processor, and the memory stores a control program that, when executed by the processor, is used to implement the engine start-stop control method;
• and
• the engine start-stop control method comprises:
• obtaining a target parameter or a target signal, which is engine start-stop related, of the hybrid electric vehicle;
• determining, according to the target parameter or target signal, whether an engine start-stop related event occurs;
• in response to that the engine start-stop related event occurs, determining a level of the engine start-stop related event;
• and
• performing engine start-stop control according to the engine start-stop related event and the level thereof;
• wherein
• the engine start-stop related event comprises at least one of the following:
• an energy management related start-stop event, a driving behavior related start-stop event, an engine state related start-stop event, an external controller request start-stop event, and other condition related start-stop events;
• the level of the engine start-stop related event comprises a first level and a second level, and the second level is higher than the first level;
• when the level of the engine start-stop related event is the first level, the step of performing engine start-stop control according to the engine start-stop related event and the level thereof comprises:
• keeping the engine in operation under the condition that the engine has operated;
• when the level of the engine start-stop related event is the second level, the step of performing engine start-stop control according to the engine start-stop related event and the level thereof comprises:
• requesting and controlling the engine to start under the condition that the engine has stopped;
• the level of the external controller request start-stop event is the second level, and the external controller request start-stop event comprises at least one of the following:
• air conditioner controller request start and driver leaving request start;
• the target signal comprises a start request signal of an air conditioner controller;
• the step of determining, according to the target parameter, whether an engine start-stop related event occurs comprises:
• when the start request signal of the air conditioner controller is received, determining that the air conditioner controller request start occurs;
• and/or
• the target parameter comprises a current operating state of the vehicle, a current vehicle speed and a driver state;
• and
• the step of determining, according to the target parameter, whether an engine start-stop related event occurs comprises:
• when the current operating state of the vehicle is a driving cycle activation state, the current vehicle speed is 0, and the driver state is leaving, determining that the driver leaving request start occurs.