Patent ID: 9523298
Filing Date: 2016-12-20
CPC Classification: F01M,F02B

Claim Text:
1. A boosted engine system having a crankcase and configured to indicate whether the crankcase is breeched, the system comprising: a sensor with an output signal responsive to a crankcase pressure; a positive crankcase ventilation (PCV) system including a breather conduit coupling a first cylinder valve cover to a clean-air inlet and a PCV conduit coupling a second cylinder valve cover to an intake manifold; an electronically actuable valve disposed in the breather conduit; and an electronic control unit configured to sample the output signal, to indicate the crankcase breeched if the output signal fails to indicate an expected level of pressure during push-over conditions, and to indicate the crankcase breeched if the output signal fails to indicate an expected level of vacuum during clean-air purge conditions.