Control system regulating air flow to engine intake
AssigneeG. W. Lisk Company, Inc.
InventorJeffrey A. Tyler
Life of this patent
Estimating the term…
Abstract
A servomechanism for a valve controlling engine intake flow via a cooler and a bypass uses a proportional solenoid operating a hydraulic valve to power a hydraulic actuator setting the position of the control valve. An engine sensor and electric controller provide input to the proportional solenoid, and feedback from the position of the control valve is applied to the hydraulic valve by a cam and spring applying a force in opposition to the proportional solenoid.
Claims21
A method of regulating a valved intake flow through a cooler and a cooler bypass to an engine intake, the method comprising:
- a. using a hydraulically powered actuator to change the valved flow;
- b. adjusting the hydraulic actuator with a spool valve positioned by a proportional solenoid to infinitely adjust the valved flow;
- c. controlling the proportional solenoid in response to a sensor of engine temperature;
- d. arranging a spring to move with changes in the valved flow;
- e. transmitting a feedback force to the spool valve via the spring;
- and
- f. responding to a change of current to the proportional solenoid caused by a change in engine temperature detected by the sensor by moving the spool valve to change flow of hydraulic fluid to the hydraulic actuator to adjust the valved flow and change the feedback transmitted by the spring to the spool valve.
A servomechanism operating a control valve regulating flow to an engine intake via a cooler and a bypass, the servomechanism comprising;
- a. a hydraulic actuator for the control valve;
- b. the hydraulic actuator being operated by a proportional solenoid positioning a hydraulic valve in a circuit to the actuator;
- c. position of the control valve being fed back as a variable force applied to the hydraulic valve in opposition to the solenoid;
- and
- d. a cam moving with the control valve and a spring arranged between the cam and the hydraulic valve to feed back the variable force.
A servomechanism arranged to regulate at least one control valve directing intake to a diesel engine via a cooler and a bypass of the cooler, the servomechanism comprising;
- a. a hydraulic actuator arranged to position the control valve;
- b. a hydraulic circuit arranged to deliver hydraulic fluid to the actuator;
- c. an engine sensor detecting a condition of the engine;
- d. an electronic controller in communication with the sensor;
- e. a proportional solenoid powered by the electronic controller in response to the sensor;
- f. a hydraulic spool valve positioned by an armature of the proportional solenoid, the spool valve being arranged in the hydraulic circuit to the actuator;
- and
- g. a compression spring arranged to feed back to the spool valve a spring force representing control valve position and opposing the armature of the solenoid, whereby the control valve is infinitely variable in response to the engine sensor, and wherein a change of current to the proportional solenoid in response to a change in an engine condition detected by the sensor moves the spool valve to change flow of hydraulic fluid to the hydraulic actuator, adjusts the control valve, and chances the feedback transmitted to the stool valve via the compression spring.
A system controlling flow to an engine intake via a control valve arranged to vary flow rates in passageways leading through a cooler and a cooler bypass, the system comprising:
- a. a hydraulic actuator arranged to adjust the control valve to vary the flow rates;
- b. a proportional solenoid operating a spool valve in a hydraulic circuit to the actuator so that the spool valve of the proportional solenoid adjusts hydraulic flow to the actuator;
- c. an electronic control having an input from a sensor of an engine condition and having an output of current to the proportional solenoid;
- and
- d. a mechanical coupling arranged to feed position of the control valve back to the spool valve in opposition to the proportional solenoid wherein a chance of current to the proportional solenoid in response to a change in an engine condition detected by the sensor moves the spool valve to change flow of hydraulic fluid to the actuator, adjusts the control valve, and changes the feedback via the mechanical coupling.
A system regulating temperature of charged inlet air to an engine, the system including a supercharger or turbo charger, an intercooler, an intercooler bypass, and a sensor of engine temperature, and the system comprising:
- a. at least one air valve arranged to vary a rate of cooled air flow reaching the engine via the intercooler and to vary a rate of uncooled air flow reaching the engine via the bypass;
- b. a hydraulic actuator arranged to position the air valve to affect the temperature of the air flow reaching the engine intake in response to engine temperature detected by the sensor;
- c. a circuit powering the hydraulic actuator being controlled by a spool valve moved by a proportional solenoid receiving electrical input from a controller in communication with the sensor;
- and
- d. a mechanical feedback transmitting air valve position to the spool valve via a spring opposing force applied to the spool valve by the solenoid, wherein a change in engine temperature changes the electrical input from the controller to the proportional solenoid, which moves the spool valve and the hydraulic actuator to change the position of the air valve to a position in which the mechanical feedback transmitted to the spool valve counterbalances the force applied to the spool valve by the proportional solenoid.
Dependencies are inferred from the claim text.