Engine control method and device for hybrid vehicle

Abstract

The invention relates to the technical field of vehicles, and provides an engine control method and device for a hybrid vehicle. The engine control method comprises the step that driving starting control on an engine is carried out, and the fact that driving starting control on the engine is carried out comprises the following steps that an odd-gear clutch or an even-gear clutch of a dual-clutch automatic transmission is controlled to be converted into a sliding friction state from a closed state at a first starting moment when an HCU activates a first starting instruction aiming at the engine, in the process from the first starting moment to a second starting moment for activating a second starting instruction of the engine, the motor torque is controlled to be increased so that the totaltorque can be kept unchanged; the motor torque at the second starting moment is maintained to be unchanged from the second starting moment to a third starting moment when an oil pump of the engine starts to work; and starting from the third starting moment, the change of the motor torque is controlled, so that the engine rotating speed and the motor rotating speed synchronously change, and the total torque is kept unchanged until engine driving starting is completed. According to the engine control method and device for the hybrid vehicle, the smoothness and the dynamic property of the vehicle in the driving process of the engine are ensured, and rushing is avoided.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to an engine control method and device for a hybrid vehicle. Background technique [0002] At present, the world's automobile industry is facing two major problems: environmental pollution and lack of oil resources. Therefore, environmental protection and energy saving have become important development directions of current and future automobile technology. At the same time, the emission regulations of various countries are becoming increasingly strict. Following this trend, hybrid vehicles with low pollution and low fuel consumption have emerged as a new generation of clean energy vehicles. [0003] Taking the P2 type series hybrid vehicle as an example, the hybrid vehicle has two driving modes: fuel drive and electric drive. Based on these two driving modes, the advantage of the hybrid vehicle is that when the vehicle starts and stops, it is only driven by the motor and does not ...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention aims to propose a method for controlling the engine of a hybrid vehicle, so as to solve the problems of unevenness and power disturbance that are very likely to occur in the driving control of the engine

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