Engine starting control method for hybrid vehicle

摘要

Disclosed is an engine starting control method for a hybrid vehicle that includes a starting motor for starting an engine and a driving motor for driving a vehicle. More specifically, a control unit may be configured to accelerate a stopped engine, determine whether a current speed of the engine is greater than a predetermined value, inject fuel to the engine when the current speed of the engine is greater than the predetermined value, determine a torque of the starting motor based on a target speed of the engine, and control a speed of the engine based on the determined torque of the starting motor.

主权项

1. An engine starting control system for a hybrid vehicle, the control system including,
a first planetary gear set having a first sun gear, a first planetary carrier, and a first ring gear; a second planetary gear set having a second sun gear, a second planetary carrier continuously connected to the first ring gear and an output shaft, and a second ring gear; an engine continuously directly connected to the first planetary carrier and selectively connected to the second sun gear; a first motor continuously directly connected to the first sun gear; a second motor continuously directly connected to the second sun gear; a first clutch selectively connecting the first planetary carrier and the second ring gear; a second clutch selectively connecting the engine and the first sun gear; a first brake selectively connecting the first sun gear and a transmission case; a second brake selectively connecting the second ring gear and the transmission case, wherein the first motor is operated as a starting motor and the second motor is operated as a drive motor; and a control unit configured to: accelerate the engine when the engine is stopped; determine whether a current speed of the engine is greater than a predetermined value; control injection of fuel into the engine when the current speed of the engine is greater than the predetermined value; determine a torque of the starting motor based on a target speed of the engine; and control a speed of the engine based on the determined torque of the starting motor.