|국가/구분||United States(US) Patent 등록|
|국제특허분류(IPC7판)||F02B-037/04 F02D-041/10 F02D-011/10 F02B-037/12 F02B-037/14 F02B-037/16 F02B-037/18 F02B-039/10 F02D-041/00 F02B-039/16|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 0 인용 특허 : 12|
Methods and systems are provided for controlling boost pressure in a staged engine system comprising a turbocharger and an upstream electric supercharger. In one example, a method may include coordinating the operation of the electric supercharger and an electric supercharger bypass valve and to open the electric supercharger bypass valve to reduce the extent and duration of electric supercharger overboost.
1. A method for a boosted engine, comprising: while a downstream compressor spins up, accelerating an upstream compressor with a bypass valve, coupled in a bypass across the upstream compressor, closed to provide a flow of compressed air to a piston engine; andin response to a boost pressure overshoot, opening the bypass valve. 2. The method of claim 1, wherein the downstream compressor is larger than the upstream compressor. 3. The method of claim 1, wherein opening the bypass valve includes transiently opening the bypass valve from a fully closed posit...