Method for controlling EV-AT deep hybrid vehicle

Abstract

The invention provides a method for controlling an electrical variable automatic transmission (EV-AT) deep hybrid vehicle. The method comprises the following steps of: performing whole vehicle controlling logic: determining a key switch signal; performing self test on each controller, giving an alarm and exiting if a failure is found in the self test, and continuously operating if the controller runs normally; determining a gear signal if a key switch is at a START position, returning if the key switch is at a P gear, displaying that drive can be performed by a liquid crystal display if the key switch is not at the P position, performing self-test on each drive system, and performing corresponding operation according to failure type A, type B or non-failure type; and performing drive control logic: judging whether the vehicle is in a pure electric drive mode or not, judging a vehicle speed if the vehicle is not in the pure electric drive mode, and performing corresponding control. Themethod can realize EV-AT-based whole vehicle control, optimizes the operating point of an engine to the best economical interval or working point of the engine through speed regulation control so as to realize excellent fuel saving ratio. By the control method, the working region of the engine can be optimized to the economical interval and the engine can run in the economical interval, so that excellent fuel-saving effect can be achieved.

Description

technical field [0001] The invention relates to a control method of an EV-AT deep hybrid electric vehicle, belonging to the technical field of hybrid electric vehicles and electric vehicles. Background technique [0002] Hybrid and electric vehicles are an important direction for the development of new energy vehicles. Electric vehicles are known as the future development trend with zero emissions, low noise, and diversification of electric energy sources. However, due to the limitation of driving range, it is difficult to Realize industrialization, while hybrid electric vehicles are remanufactured on the basis of traditional internal combustion engine vehicles, retaining the original vehicle engine, adding electric drive systems such as battery motors, and optimizing the operating conditions of the engine through vehicle optimization control, so as to achieve good performance. Fuel economy and emissions. At present, Japan is the most advanced research on hybrid power techn...

AI Technical Summary

Problems solved by technology

[0002] Hybrid and electric vehicles are an important direction for the development of new energy vehicles. Electric vehicles are known as the future development trend with zero emissions, low noise, and diversification of electric energy sources. However, due to the limitation of driving range, it is difficult to Realize industrialization, while hybrid electric vehicles are remanufactured on the basis of traditional internal combustion engine vehicles, retaining the original vehicle engine, adding electric drive systems such as battery motors, and optimizing the operating conditions of the engine through vehicle optimization control, so as to achieve good performance. Fuel Savings and Emissions

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