| 摘要 |
A control system for an auxiliary gaseous fuel supply system for an internal combustion engine utilizing a primary liquid fuel supply includes a pressure regulator that is controlled by two pressure signals generated in response to engine operating conditions to enable the pressure regulator to respond more rapidly to changes in engine operating conditions. A valve in the pressure regulator is controlled by a diaphragm subjected on its opposite sides to a pair of pressure signals, one of the signals corresponding to the usual long term gas fuel demand signal which primarily controls the position of the regulator valve, the other signal corresponding to shorter term changes in intake air flow conditions in the intake air duct of the engine to augment or oppose the primary signal, depending upon instantaneous intake air flow conditions. A modulator valve blocks the secondary, short term control signal under conditions of full power demand on the engine, to enable the primary signal to effect total regulator valve control. |
