Speed transmission control device for hybrid dynamic vehicle

Abstract

The present invention discloses variable speed control unit for mixed power vehicle, and the mixed power vehicle has multiple cylinder engine capable of stopping partial cylinders, electric machine capable of sending electricity to and accepting electricity from battery, and speed variator to transmit the power of at least one of the engine and the electric machine to the wheels for running. The variable speed control unit has a cylinder stop judging mechanism to judge whether to stop partial cylinders, an electric machine output judging mechanism to judge whether to have the electric machine to assist the engine based on the residual electricity amount of the battery. According to the judgment result of the cylinder stop judging mechanism and the electric machine output judging mechanism, one speed varying map is selected from the speed varying map set for the speed variator.

Description

Technical field [0001] The present invention relates to a gear shift control device used in a hybrid vehicle equipped with an engine capable of stopping some cylinders. [0002] The present invention claims priority to Japanese Patent Application No. 2005-35765 filed on February 14, 2005, and the content is quoted here. Background technique [0003] In the past, hybrid vehicles that use an engine and an electric motor as power sources and transmit these driving forces to the wheels through transmissions such as automatic gearing have been known. In such hybrid vehicles, there is a shift control device that automatically performs shift control in accordance with the transmission and the like based on the shift map of the vehicle speed and the number of engine revolutions. (See, for example, JP 2003-369604 A). [0004] However, in recent years, in hybrid vehicles, there is an engine that can stop some cylinders in accordance with the state of the vehicle in order to further improve...

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Problems solved by technology

For this reason, there is a problem that the improvement of fuel consumption cannot be achieved due to the frequency of stopping some of the cylinders of the engine being reduced.

[0005] In addition, since the same shift map is used both when the motor assist is performed when some cylinders are stopped and when the motor assist is not performed due to the decrease in the remaining battery capacity, there is a possibility that when the former motor assist is performed, The problem of not being able to improve fuel consumption due to an unnecessary increase in the number of revolutions of the engine

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