Control device for hybrid vehicle

Abstract

A control device for a hybrid vehicle which measures the degree of over-discharge of a battery depending on the temperature of the battery, and which performs control for protecting the battery. The control device for a hybrid for a hybrid vehicle which comprises an engine outputting driving power therefor, a motor connected to the engine and outputting auxiliary driving power for assisting the output of the engine, a battery supplying electrical power to the motor as well as storing electrical energy generated by the operation of the motor as a generator, and electrical loads being supplied energy generated from the motor and electrical energy from the battery, the control device comprising: a battery protection section for increasing the revolution rate of the engine or for stopping electrical supply to the electrical loads when it is determined that the battery is in an over-discharged state; a state of charge measuring section for measuring the state of charge of the battery; and a temperature measuring section for measuring the temperature of the battery, wherein the battery protection section increases the revolution rate of the engine in an idling mode when the state of charge of the battery is equal to or less than a first predetermined value which is determined depending on the temperature of the battery, and the battery protection section stops supplying electrical power to the electrical loads when the state of charge of the battery is equal to or less than a second predetermined value which is determined depending on the temperature of the battery.

Dependencies are inferred from the claim text.