Proportional control valve assembly for exhaust gas recirculation system

摘要

A two-stage proportional control valve assembly regulates flow of a first fluid such as an engine exhaust gas using a second fluid such as engine oil for power. A directional valve under control of an electrical actuator regulates flows of the second fluid to operate a fluid-powered actuator. A mechanical connection between the fluid powered actuator and a flow control valve for regulating flows of the first fluid enables the electrical actuator to indirectly control the flow control valve with a minimum draw.