Plug-in type hybrid electric vehicle energy management method based on TTR configuration

Abstract

The invention provides a plug-in type hybrid electric vehicle energy management method based on TTR configuration. The method includes a power demand calculation link and a power distribution link. Inthe power demand calculation link, the whole vehicle demand torque is speculated according to the accelerator opening degree of a driver, and in the power distribution link, power distribution is finished in real time according to the whole vehicle demand torque. In the power distribution process, when an engine participates in drive, the relationship between the torque of the output end of the engine and the torque of the output end of a gearbox is determined according to a two-parameter shift schedule. In the two-parameter shift schedule, combined with a hybrid electric vehicle control characteristic, the demand power and the vehicle speed are selected as shift parameters. On the premise that the vehicle power performance demand is met, an energy management strategy guarantees that theengine works in a high-fuel-economical-efficiency region as much as possible and guarantees the stable working state, so that a good vehicle fuel economical efficiency target is achieved.

Description

technical field [0001] The present invention relates to an energy management method for a plug-in hybrid electric vehicle, in particular to a method based on a through-the-road (TTR) configuration and comprehensively considering the power output range of each power source and the gear position of a gearbox Energy management strategies for varying effects on engine output characteristics. Background technique [0002] Compared with other typical configurations, the through-the-road (TTR) configuration in hybrid vehicles has the advantages of low system complexity, various driving modes, and good four-wheel drive performance. Compared with traditional fuel vehicles, this configuration vehicle only adds a set of main drive motors to the power source, so it has less impact on the original structure of the vehicle and has a higher degree of integration. Any conventional power vehicle can be realized according to this scheme. Hybrid transformation has broad development prospects....

AI Technical Summary

Problems solved by technology

However, there are few types of vehicle products using the TTR configuration in the existing market, and further development is still needed. The hybrid energy management strategy based on this configuration also needs further research. At present, there is still a lack of efficient energy management methods. Axis control strategy to achieve the balance of power, economy and four-wheel drive matching

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