Controller of hybrid vehicle

Abstract

A controller of a hybrid vehicle, comprising an engine and a motor used as vehicle drive sources and a storage device converting the output of the engine or the kinetic energy of the vehicle into an electric energy by the motor and storing the electric energy therein. The engine is of an idling-cylinder type in which cylinders are allowed to be idle. Also, the engine comprises a motor independentrunning discrimination means discriminating, based on at least a vehicle speed, whether a motor independent running in which the cylinders of the engine are idled and the vehicle is driven by only the motor is permitted or not, an initial residual capacity calculation means calculating the residual capacity of the storage device when the ignition of the vehicle is turned on, a district residual capacity calculation means calculating the residual capacity of the storage device each time the vehicle is stopped, and an upper limit vehicle speed correction means correcting, based on a difference between the initial residual capacity calculated by the initial residual capacity calculation means and a district residual capacity calculated by the district residual capacity calculation means, an upper limit vehicle speed in the motor independent running allowed by the motor independent running discrimination means.

Description

technical field [0001] The present invention relates to a control device for a hybrid vehicle which is equipped with an engine and an electric motor, and is applicable to a hybrid vehicle that can travel using the driving force of the electric motor alone, the driving force of the engine, and the like. [0002] In this case, priority is claimed over Japanese Patent Application No. 2004-215431 filed on July 23, 2004, and its content is hereby cited. Background technique [0003] Conventionally, there is known a hybrid vehicle that includes, for example, an internal combustion engine and an electric motor as drive sources, and that travels while transmitting the driving force of at least one of the internal combustion engine or the electric motor to drive wheels. According to such a hybrid vehicle, the engine and the electric motor can be used differently according to the operating state, thereby reducing fuel consumption and exhaust gas volume. [0004] In such a hybrid vehi...

AI Technical Summary

Problems solved by technology

[0009] However, when the power consumption of the power storage device increases due to EV running at a normal speed, and the energy cannot be recovered sufficiently even through the subsequent regeneration process, if the EV continues to run at a normal speed, there is a problem that the storage capacity will be reduced. The power of the electric device is greatly reduced, impairing the driving performance

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