초록 ▼

An emission control valve assembly has an internal main flow passage through a valve body between a first port and a second port, an electric actuator, and a valve operated by an armature of the actuator to selectively open and close the passage. A force-balancing mechanism applies to the valve a fo

An emission control valve assembly has an internal main flow passage through a valve body between a first port and a second port, an electric actuator, and a valve operated by an armature of the actuator to selectively open and close the passage. A force-balancing mechanism applies to the valve a force that opposes force created by pressure differential between the first and second ports. An annular filter cartridge is disposed within the valve body to trap particulate material in flow entering through the first port so that the trapped material does not reach the valve and its seat.

대표청구항 ▼

[ What is claimed is:] [1.] An emission control valve assembly comprising a body having an internal flow passage between a first port and a second port, an annular valve seat in circumscribing relation to the passage, an actuator operating a valve relative to the valve seat to selectively restrict f

[ What is claimed is:] [1.] An emission control valve assembly comprising a body having an internal flow passage between a first port and a second port, an annular valve seat in circumscribing relation to the passage, an actuator operating a valve relative to the valve seat to selectively restrict flow through the passage, and an annulus disposed in circumscribing relation to the seat and the valve and comprising a particulate filter medium through which flow through the passage is constrained to pass.