Pressure switch diagnostic system for electrically variable hybrid powertrain, has logic valve in fluid communication with trim valves such that pressure sensitive switches detect changes in logic valve without additional switch

摘要

Several pressure sensitive switches (PS4) are in selective fluid communication with one of the several trim valves (106). The switches are operable to detect a change of position of trim valves and report one of the high or low logic state. A logic valve is in selective fluid communication with trim valves such that several pressure sensitive switches are operative to detect changes in logic valve without requiring additional pressure sensitive switch.