Startup control method of mixed power automobile

Abstract

The invention aims at providing a start-up control method suitable for a hybrid vehicle among which a drive motor and an engine are of coaxial parallel type; the start-up control method for the hybrid vehicle uses different start-up ways under different conditions; under a permitting condition, the drive motor is preferably used for driving the engine to start up; the start-up control method has the advantages of short start-up time, high start-up rotation speed, smooth start-up process and less pollution emission, can also avoid the damage to the battery, the drive motor, and the like, can improve the start-up performance and achieve the optimization of the whole vehicle performance.

Description

technical field [0001] The invention belongs to the control field of hybrid electric vehicles, and in particular relates to the starting control of hybrid electric vehicles. Background technique [0002] In response to the energy crisis and environmental degradation, energy-saving and environmentally friendly hybrid electric vehicles have been paid more and more attention. Compared with traditional cars, hybrid vehicles require a vehicle controller (referred to as HCU), a drive motor and an energy storage package (usually a high-voltage battery). Among them, the vehicle controller is responsible for judging the driver's intention and the vehicle state. When there is a driver's acceleration request, the vehicle controller HCU interprets the power request, and then performs power distribution, requesting power from the engine and the drive motor respectively; When the driver has a request for deceleration, the vehicle controller HCU controls the drive motor to enter the regen...

AI Technical Summary

Problems solved by technology

Similarly, when the driver has a request to start the engine, the vehicle controller HCU will enter the start mode, which is the same as that of a traditional car. The current hybrid vehicle starts the engine by a starter motor installed on the flywheel side of the engine, and the start time is relatively short. Long, low start-up speed, not smooth start-up process, but also increase fuel consumption and pollutant emissions, which are deficient in terms of comfort, drivability, economy and environmental protection

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