hybrid vehicle

Abstract

The present invention is a hybrid vehicle capable of appropriately reducing the starting shock when compensating for torque at the time of starting by outputting a rotary machine during starting of an internal combustion engine. When the engine ( 14 ) is started from the motor start mode, when the surplus torque of the second rotating machine ( MG2 ) is small compared to the case where the surplus torque of the second rotating machine ( MG2 ) is large, the engine is accompanied by a The engine (14) is started in such a way that the inertia torque at the time of starting caused by the start of (14) is reduced, and the surplus torque of the second rotating machine (MG2) can be used for the second rotating machine (MG2) to output the running torque. Therefore, when the surplus torque of the second rotary machine (MG2) is small, the amount of decrease in the drive torque due to the inertia torque at startup is reduced. Thereby, even if the surplus torque of the second rotary machine ( MG2 ) is small, the amount of decrease in the driving torque can be compensated. Therefore, when the start-up compensation torque is output from the second rotating machine (MG2) during the start-up of the engine (14), the start-up shock can be appropriately reduced.

Description

technical field [0001] The present invention relates to a hybrid vehicle including an internal combustion engine and a rotating machine that are coupled to drive wheels so as to transmit power. Background technique [0002] Hybrid vehicles including an internal combustion engine and a rotating machine that are coupled to drive wheels so as to transmit power are known. For example, this is the case with the hybrid vehicle described in Patent Document 1. This Patent Document 1 discloses that a clutch is provided for connecting or disconnecting a power transmission path between an internal combustion engine and a drive wheel, and a driving state is changed from a running state in which a driving torque is generated by a rotating machine in a state where the internal combustion engine is stopped. When switching the traveling state of traveling with the internal combustion engine running, the internal combustion engine is started by increasing the rotational speed of the interna...

AI Technical Summary

Problems solved by technology

However, since it is necessary for the rotary machine to output the compensation torque at startup in addition to the running torque, depending on the magnitude of the running torque already generated by the rotary machine, there may be a difference in the surplus torque relative to the driving torque. The amount of drop is insufficient to properly reduce the starting shock. This surplus torque is the torque of the surplus amount of the rotary machine that can be used to compensate the torque at startup.

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