| 摘要 |
<p>A pressure indicator includes a housing and a diaphragm held by the housing. The diaphragm has a diaphragm surrounding wall defining an interior, an open end, and a closed end. The closed end has a first side, an opposite second side, and a center apex. The first side is in communication with the interior of the diaphragm surrounding wall. The diaphragm is deflectable between a first position and a tripped position and between the tripped position and the first position. The diaphragm is moveable from the tripped position to the first position in response to physical, manual contact by a pushing member on the first side of the closed end of the diaphragm. A closed engine crankcase system includes an air filter, an engine in gas flow communication with the air filter, a blow-by filtration system downstream of and in fluid communication with the engine crankcase, and a pressure indicator in gas flow communication with the engine crankcase and upstream of the blow-by filtration system. The pressure indicator includes a housing and a diaphragm held by the housing. The diaphragm is moveable from a first position to a tripped position in response to pressure downstream of the engine crankcase. A method of indicating pressure in an engine crankcase includes moving a diaphragm in a pressure indicator from a first position to a tripped position when pressure in flow communication with the engine crankcase exceeds a predetermined amount. The method also includes resetting the pressure indicator by accessing the diaphragm from an atmospheric side of the pressure indicator and manually pushing the diaphragm from the tripped position to the first position.</p> |
