US 5,550,445 A · Generator controller and controlling method for hybrid vehicle

Abstract

A generator controller and controlling method of a hybrid vehicle. A battery voltage is compared with a predetermined value and when the battery voltage is lower than the predetermined value as a result of the comparison, an state of charge of the battery is discriminated. In the case of an state of charge of at least 70%, a generator output is controlled on the basis of a motor output, and in the case of an state of charge of less than 70%, while the generator output is controlled to a relatively high value, the motor output is limited. When the state of charge is restored to more than 75%, the voltage is controlled depending on the motor output. In the case of at least the predetermined value of the battery voltage, an idle control of an engine is carried out. As a result, the state of charge of the battery can be ensured and overcharging of the battery can be prevented.

Claims16

Dependent claims

A generator controller for controlling an operation of a generator mounted on a hybrid vehicle, said hydrid vehicle including a battery for supplying electric power to a motor, the generator for supplying electric power to the motor and the battery, and an engine for driving the generator, comprising:

means for detecting a heavy load state in which a battery charge state is reduced to less than a predetermined value;
means for carrying out an increase control of an output of the generator and for limiting an output of the motor so that, when the heavy load state is detected, the generator output is used, for a certain period, to charge the battery, and
means for either stopping or avoiding the increase control of the generator output and the output limitation of the motor when at least heavy load state is not detected.

A generator controlling method for controlling an operation of a generator, executed on a hybrid vehicle including a battery for supplying electric power to a motor, the generator for supplying electric power to the motor and the battery, and an engine for driving the generator, comprising:

a step for detecting a heavy load state in which a battery charge state is reduced to less than a predetermined value;
a step for carrying out an increase control of an output of the generator and for limiting an output of the motor so that, when the heavy load state is detected, the generator output is used, for a certain period, for charging the battery;
and
a step for either stopping or avoiding the increase control of the generator output and the output limitation of the motor when at least the heavy load state is not detected.

1 more element

Dependencies are inferred from the claim text.

Generator controller and controlling method for hybrid vehicle

Life of this patent

Generator controller and controlling method for hybrid vehicle

Life of this patent

Abstract

Claims16