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发明公开
CN104364500A 内燃机及其控制方法 有权

内燃机及其控制方法
摘要：
ECU(20)在车辆减速时判定涡轮增压机(5)的压缩机(5b)是否成为喘振状态，当判定为压缩机(5b)成为喘振状态时，作为喘振避免控制，包括喘振避免机构(工序)(S10)，取得基于运转状态和第1开度映射(M1)的涡轮增压机(5)的涡轮(5a)的喷嘴叶片(5c)的第1目标开度(TAn)，在第1目标开度(TAn)小于预先设定的喘振避免用第1目标开度(TAx)的情况下，将喷嘴叶片(5c)控制为喘振避免用第1目标开度(TAx)，在第1目标开度(TAn)为喘振避免用第1目标开度(TAx)以上的情况下，将喷嘴叶片(5c)控制为第1目标开度(TAn)，因此能够避免该压缩机(5b)的喘振状态。
摘要（英）：

In order to avoid a surge state of the compressor (5b) of a turbocharger (5), an ECU (20) is configured to be provided with a surge avoidance means (process) which, during vehicle deceleration, determines whether or not the compressor (5b) of the turbocharger (5) enters a surge state; if the compressor (5b) is determined to enter a surge state, then, as surge avoidance control, the surge avoidance means acquires a first target opening degree (TAn) of the nozzle vane (5c) of a turbine (5a) of the turbocharger (5) based on the driving state and a first opening degree map (M1); if the first target opening degree (TAn) is less than a pre-set surge avoidance first target opening degree (TAx), then the surge avoidance means controls the nozzle vane (5c) to the surge avoidance first target opening degree (TAx), and if the first target opening degree (TAn) is greater than or equal to the surge avoidance first target opening degree (TAx), controls the nozzle vane (5c) to the first target opening degree (TAn).

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