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发明公开
CN104895633A 具有快速打开式气门正时的发动机控制系统 无效 - 撤回

具有快速打开式气门正时的发动机控制系统
摘要：
公开了一种具有快速打开式气门正时的发动机控制系统。发动机可具有气缸、可滑动地配置在气缸中的活塞以及构造成开闭排气口的排气门。发动机的运转可包括将空气和燃料引导到气缸内，并且使空气和燃料燃烧以在TDC位置与BDC位置之间推动活塞。运转还可包括根据第一气门正时在活塞移动期间周期性地开闭排气门。运转还可包括接收指示与空气和燃料的提前点燃相关的条件的信号，并且至少基于该信号而根据第二气门正时选择性地开闭排气门。在第二气门正时下，排气门可在比第一气门正时下短的时间内从关闭位置移动到最大升程位置。
摘要（英）：

An engine control system having quick-open valve timing is disclosed. The engine may have a cylinder, a piston slidably disposed in the cylinder, and an exhaust valve configured to open and close an exhaust port. Operation of the engine may include directing air and fuel into the cylinder, and combusting the air and fuel to force the piston between a TDC position and a BDC position. Operation may further include cyclically opening and closing the exhaust valve during piston movement according to a first valve timing. Operation may also include receiving a signal indicative of a condition associated with pre-ignition of the air and fuel, and selectively opening and closing the exhaust valve according to a second valve timing, based at least on the signal. In the second valve timing, the exhaust valve may be moved from a closed position to a maximum lift position in a shorter amount of time than in the first valve timing.

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