| 摘要 |
PURPOSE: An engine start stabilization method of a hybrid system is provided to rapidly convert, an engine start that uses an HSG(Hybrid Starter & Generator) which is connected through a belt to an engine, into the engine start that uses a drive motor when the belt slip of the HSG occurs during the engine start that uses the HSG, thereby having an effect in stopping the progress of the belt slip of the HSG quickly. CONSTITUTION: An engine start stabilization method of a hybrid system is composed of the following steps. The HSG-engine start attempting step is to use a HSG belt of attempt to start an engine. The HSG belt slip recognition step is to determine whether the slip of the HSG belt is in the state of high danger or not after the suitability of an RPM(Revolution Per Minute) setup condition, and the suitability of an HSG RPM setup condition and of a CRK RPM(crank shaft Revolution Per Minute) setup condition are checked. The HSG belt slip checking step is to reattempt to start the engine of the HSG in the non-slip state of the HSG belt, and to maintain a driving condition by using a drive motor when the HSG-engine start fails. The HSG belt slip condition storing step is to store a condition which is applied to the determination of the high danger of the HSG belt slip, and to apply a part of the condition value, which is stored when the HSG-engine start is reattempted when the engine is stopped, to the previous condition value, where an HSG belt protection logic, which is executed in the HSG belt slip condition storing step, is additionally included. [Reference numerals] (S10) Engine starting attempt; (S20) Is an engine turned on by HSG?; (S21) Vehicle driving mode; (S30) Failure diagnosis execution; (S40) Detection method selection; (S50) Continuous condition mode; (S51) Minimum engine torque number Es<500RPM; (S52) Torque number difference (Esd=HSG rpm x pulley ratio-CRK rpm) > 300RPM; (S53) Torque number difference (Esd=HSG rpm x pulley ratio-CRK rpm) > 900RPM; (S54) Continuous time Te = eight seconds; (S60) Accumulation condition mode; (S61) Accumulated torque difference (Esd=HSG rpm x pulley ratio-CRK rpm) > 1,000RPM; (S62) Torque number accumulated number Ss = 200,000RPM x hundred times; (S70) HSG belt sleep available determination |
