Method of cold starting an internal combustion engine in hybrid applications
    1.
    发明授权
    Method of cold starting an internal combustion engine in hybrid applications 有权
    混合应用中冷启动内燃机的方法

    公开(公告)号:US09022002B2

    公开(公告)日:2015-05-05

    申请号:US13517687

    申请日:2012-06-14

    摘要: A method to start operation of an internal combustion engine of a hybrid powertrain includes initiating rotation of a crankshaft of the engine with at least one electric machine in accordance with a first ramping profile until a first predetermined speed is achieved in response to an engine start event during a cold start condition. Engine speed is monitored and the engine is fired while controlling the engine speed to maintain the first predetermined speed with the at least one electric machine. The first ramping profile is adjusted at a rate corresponding to an estimated rate at which the engine speed is increasing during the engine firing. When at least one predetermined combustion quality parameter is achieved, the engine speed is controlled in accordance with a second ramping profile until a second predetermined speed is achieved based on controlling combustion parameters of the engine.

    摘要翻译: 一种启动混合动力系的内燃机的操作的方法包括根据第一斜坡轮廓,用至少一个电机启动发动机曲轴的转动,直到响应于发动机起动事件达到第一预定速度 在冷启动条件。 在控制发动机转速以与至少一台电机保持第一预定速度的同时监视发动机转速并引擎发射。 以对应于发动机起动期间发动机转速增加的估计速率的速率来调节第一斜坡曲线。 当实现至少一个预定的燃烧质量参数时,根据第二斜坡轮廓来控制发动机转速,直到基于控制发动机的燃烧参数来实现第二预定速度。