ENGINE START CONTROL APPARATUS FOR HYBRID VEHICLE

摘要

A control device of a hybrid vehicle for starting an engine, the hybrid vehicle has a direct injection engine directly injecting fuel into a cylinder, a clutch connecting/disconnecting the direct injection engine to/from a power transmission path, and a rotating machine acting at least as an electric motor, the hybrid vehicle is configured to run by concurrently or separately using the direct injection engine and the rotating machine as a drive force source, the hybrid vehicle is configured to execute ignition start of the direct injection engine in which the direct injection engine is started by injecting and igniting fuel in a cylinder with a piston stopped in an expansion stroke during stop of the direct injection engine, and an engine torque is reduced based on a speed difference between an engine rotation speed and a rotation speed of a power transmission path side across the clutch when the speed difference is smaller as compared to the speed difference is larger such that the engine torque is reduced as the engine rotation speed comes closer to the rotation speed of the power transmission path side in a process of increasing the engine rotation speed, when the clutch is connected after the ignition start of the direct injection engine is performed.

主权项

1. A control device of a hybrid vehicle for starting an engine, the hybrid vehicle having
a direct injection engine directly injecting fuel into a cylinder, a clutch connecting/disconnecting the direct injection engine to/from a power transmission path, and a rotating machine acting at least as an electric motor, the hybrid vehicle being configured to run by concurrently or separately using the direct injection engine and the rotating machine as a drive force source and, the hybrid vehicle being configured to execute ignition start of the direct injection engine in which the direct injection engine is started by injecting and igniting fuel in a cylinder with a piston stopped in an expansion stroke during stop of the direct injection engine, an engine torque being reduced based on a speed difference between an engine rotation speed and a rotation speed of a power transmission path side across the clutch when the speed difference is smaller as compared to the speed difference is larger such that the engine torque is reduced as the engine rotation speed comes closer to the rotation speed of the power transmission path side in a process of increasing the engine rotation speed, when the clutch is connected after the ignition start of the direct injection engine is performed.