Patent ID: 8177671
Filing Date: 2012-05-15
Classification: B60K,B60L,B60W,F16H,Y02T,Y10T

Abstract:
1. A control system for a hybrid drive unit having an internal combustion engine, and first and second electric motors capable of generating electric power, comprising: a power distribution mechanism comprising three rotary elements rotated differentially amongst each other including a first rotary element to which a power of the internal combustion engine is transmitted, a second rotary element to which a power of the first electric motor is transmitted, and a third rotary element to which a power of the second electric motor is transmitted; a speed change mechanism capable of setting a first speed change mode in which the power transmitted from the second rotary element is outputted to an output member, and a second speed change mode in which the power transmitted from the third rotary element is outputted to the output member; and a first speed change control means, which sets an electric vehicle running mode by temporarily disabling the internal combustion engine to transmit the power thereof to the output member while transmitting the power outputted from any of the electric motors to the output member instead of transmitting the power of the internal combustion engine, in case of shifting the speed change mode of the speed change mechanism under a condition in which the power of the internal combustion engine is being transmitted to the output member without being converted into an electric power by the electric motors.