Variable gain solenoid valve control system

Claim 1

A PINTLE CONTROL SYSTEM INCLUDING IN COMBINATION: A DISPLACEABLE PINTLE; A FLUID PRESSURE MEANS INCLUDING A PRESSURE CHAMBER AND A DISPLACEABLE HEAD MOUNTED THEREIN AND OPERATIVELY ASSOCIATED WITH SAID PINTLE FOR DISPLACING THE PINTLE IN ACCORDANCE WITH CHANGES IN FLUID PRESSURE OPERATIVELY ESTABLISHED WITHIN SAID CHAMBER; ELECTRICAL CIRCUIT FEEDBACK MEANS OPERATIVELY ASSOCIATED WITH SAID PINTLE AND ADAPTED TO MONITOR PINTLE DISPLACEMENT AND PROVIDE PINTLE POSITION FEEDBACK SIGNALS INDICATIVE OF DISPLACEMENT IMPARTED TO SAID PINTLE; FLUID PRESSURE CONTROL MEANS FOR INITIATING FLUID PRESSURE CHANGES WITHIN SAID CHAMBER INCLUDING A PAIR OF FLUID FLOW CONTROL SOLENOID VALVES DISPOSED AT OPPOSITE SIDES OF SAID CHAMBER AND COMMUNICATING THEREWITH THROUGH FLUID CONDUITS FOR OPERATIVELY CONTROLLING THE QUANTITY OF FLUID DELIVERED TO AND RETAINED IN SAID CHAMBER; TWO SOLENOID DRIVER CIRCUITS, EACH BEING SINGLY CONNECTED WITH ONE OF SAID SOLENOID VALVES AND ADAPTED TO BE ACTIVATED IN RESPONSE TO INPUT PULSES FOR OPENING THE CONNECTED VALVE AND SUBSEQUENTLY RETAINING THE VALVE IN AN OPEN CONDITION FOR A TIME PERIOD AS DICATED BY THE WIDTH OF SAID PULSES TO ACCOMMODATE AN ESTABLISHMENT OF A FLUID FLOW BETWEEN THE CONNECTED SOLENOID VALVE AND THE FLUID PRESSURE CHAMBER, AND FURTHER ADAPTED TO BE INACTIVATED IN THE ABSENCE OF A PULSE FOR ACCOMMODATING A CLOSING OF THE CONNECTED VALVE TO INTERRUPT SAID FLUID FLOW; TWO VOLTAGE CONTROLLED DELAY MULTIVIBRATOR CIRCUITS, EACH BEING SINGLY CONNECTED WITH ONE OF SAID DRIVER CIRCUITS AND ADAPTED TO BE ACTIVATED FOR PROVIDING TO SAID ONE SOLENOID DRIVER CIRCUIT INPUT PULSES OF A VARIABLE WIDTH; A PULSE OSCILLATOR CIRCUIT COUPLED WITH THE TWO VOLTAGE CONTROLLED DELAY MULTIVIBRATOR CIRCUITS FOR SIMULTANEOUSLY PROVIDING A SERIES OF PULSES TO THE DELAY MULTIVIBRATOR CIRCUITS FOR SIMULTANEOUSLY ACTIVATING THE TWO MULTIVIBRATOR CIRCUITS IN UNISON; AN AMPLIFIER CIRCUIT CONNECTED WITH THE TWO MULTIVIBRATOR CIRCUITS ADAPTED TO ALTERNATIVELY DIRECT A PULSE DURATION CONTROL SIGNAL TO ONE OF THE TWO MULTIVIBRATOR CIRCUITS IN ACCORDANCE WITH AN AMPLIFIER INPUT SIGNAL FOR DICTATING THE PULSE WIDTH OF THE SOLENOID DRIVER CIRCUIT INPUT PULSES; A SELECTIVELY POSITIONED PINTLE CONTROL TRANSDUCER ADAPTED TO BE SELECTIVELY POSITIONED FOR PROVIDING A SELECTIVELY VARIABLE PINTLE CONTROL OUTPUT SIGNAL; AND MEANS CONNECTED WITH THE FEEDBACK MEANS AND THE PINTLE CONTROL TRANSDUCER FOR SUMMING THE PINTLE POSITION FEEDBACK SIGNAL AND THE PINTLE CONTROL OUTPUT SIGNAL TO PROVIDE AN AMPLIFIER INPUT SIGNAL TO SAID AMPLIFIER CIRCUIT, WHEREBY THE VOLTAGE VALUE OF THE AMPLIFIER INPUT SIGNAL MAY BE ESTABLISHED IN ACCORDANCE WITH THE PINTLE''S POSITION AND THE PINTLE CONTROL TRANSDUCER SETTING FOR VARYING THE PERIOD OF OPEN CONDITION FOR ONE OF SAID SOLENOID VALVES TO EFFECTIVELY INITIATE PINTLE DISPLACEMENT.