초록 ▼

An apparatus for controlling a hybrid vehicle having an internal combustion engine and an electric motor as driving sources for the vehicle, in which when it is detected that an air-fuel ratio of a supply air-fuel mixture to the engine changed to the lean side value (S44.about.S46), the electric mot

An apparatus for controlling a hybrid vehicle having an internal combustion engine and an electric motor as driving sources for the vehicle, in which when it is detected that an air-fuel ratio of a supply air-fuel mixture to the engine changed to the lean side value (S44.about.S46), the electric motor (2) is made operative as a motor in order to assist an output of the engine just after the detection (S47, S48). When it is detected that the air-fuel ratio of the supply air-fuel mixture changed to the rich side value (S44, S52, S53), the electric motor (2) is made operative as a generator for the purpose of the regeneration braking just after the detection (S54, S55). An output torque difference of the engine, therefore, when the air-fuel ratio of the supply air-fuel mixture changes can be sufficiently compensated without a time delay.

대표청구항 ▼

1. An apparatus for controlling a hybrid vehicle having an internal combustion engine and an electric motor as driving sources for the vehicle, said electric motor operating as a motor to assist an output of said internal combustion engine and operating as a generator to regenerate running energy of

1. An apparatus for controlling a hybrid vehicle having an internal combustion engine and an electric motor as driving sources for the vehicle, said electric motor operating as a motor to assist an output of said internal combustion engine and operating as a generator to regenerate running energy of the vehicle and to charge voltage storage means, said apparatus comprising:air-fuel ratio detecting means for detecting a change in air-fuel ratio of an air-fuel mixture which is supplied to said engine; and electric motor control means for making said electric motor operative as a motor when it is detected by said air-fuel ratio detecting means that the air-fuel ratio changed from a rich side value to a lean side value, and for making said electric motor operative as a generator when it is detected that the air-fuel ratio has changed from the lean side value to the rich side value, wherein upon detection by said air-fuel ratio detecting means that the air-fuel ratio has changed from the rich side value to the lean side value, said electric motor control means makes said electric motor operative as a motor and, thereafter, gradually decreases a driving force of the motor, and upon detection by the air-fuel ratio detecting means that the air-fuel ratio has changed from the lean side value to the rich side value, said electric motor control means makes said electric motor operative as a generator and, thereafter, gradually decreases a regeneration braking force of the generator.