Measuring and testing – Vehicle chassis – Steering
Patent
1996-08-28
1998-08-11
Biegel, Ronald L.
Measuring and testing
Vehicle chassis
Steering
123 4186, G01M 1500
Patent
active
057929491
ABSTRACT:
A positive crankcase ventilation system diagnostic applied in an automotive internal combustion engine with a pressure sensor disposed in the system for continuous sensing of system pressure while the engine is running in a steady state operating condition, with minimum and maximum sensed pressure values stored during each of repeated test periods. Pressure values exceeding a predetermined normal range over at least one test period indicate a leak or restriction condition in the system. Small differences in pressure values over test periods indicate sensor or electrical fault conditions. Fault conditions are logged and are indicated if persistent.
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U.S. application No. 08/740,177, Patel et al., filed Oct. 1996.
U.S. application No. 08/740,178, O'Daniel, Filed Oct. 1996.
Hewelt James Michael
Stewart Etsuko Muraji
Biegel Ronald L.
Bridges Michael J.
General Motors Corporation
McCall Eric S.
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