Sequential Start type Engine Cold Start Method and Hybrid Electric Vehicle
The present invention relates to a cold starting method for sequential starting-type engine and a hybrid vehicle, which are able to start the engine (2) by the operation of a starter (9) under a condition of cold start of the engine determined by detecting an engine rev count and cooling water tempe...
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Format: | Patent |
Sprache: | eng ; kor |
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Zusammenfassung: | The present invention relates to a cold starting method for sequential starting-type engine and a hybrid vehicle, which are able to start the engine (2) by the operation of a starter (9) under a condition of cold start of the engine determined by detecting an engine rev count and cooling water temperature of a controller (10) in accordance with the start of the engine (2), and to complete the start of the engine (2) by an operation of an MHSG (7) following a stop of the starter (9) at a specific engine rev count or above of the engine (2), and to apply a cranking torque of the MHSG (7) in addition to the starter (9), thereby improving a starting property of the engine. Especially, the cranking torque of the MHSG is associated to a point of time when an engine crank and an accessories belt system try to rotate by overcoming an engine friction, so a belt slip of an accessories system (4) applied to the engine (2) is weakened, and an impact and noise of an accessories′ tensioner are also weakened.
본 발명의 하이브리드 차량의 순차시동방식 엔진 냉시동 방법은 엔진(2)의 시동에 따른 컨트롤러(10)의 엔진 회전수와 냉각수온의 검출로 판단된 엔진 냉시동 조건시 스타터(9)의 동작으로 엔진(2)의 시동이 이루어진 후 엔진(2)의 특정 엔진회전수 이상에서 스타터(9) 중지에 이은 MHSG(7)의 동작으로 엔진(2)의 시동을 완료함으로써 스타터(9)에 더한 MHSG(7)의 크랭킹 토크(cranking torque)인가로 엔진 시동성이 향상되고, 특히 MHSG의 크랭킹 토크가 엔진 크랭크(crank)와 보기류 벨트 시스템이 엔진 마찰(friction)을 이기고 회전하려는 시점과 연계됨으로써 엔진(2)에 적용된 보기류 시스템(4)의 벨트 슬립(slip) 약화와 함께 보기류 텐셔너의 충격 및 소음도 약화되는 특징을 갖는다. |
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