Vehicle Fuel Gas Pre-Filter Unit

摘要

A vehicle fuel gas pre-filter unit can include a housing, a filter, and an inlet valve. The housing is installed in a vehicle structure that includes an outlet valve. The filter is located in the housing and between the inlet and outlet valves with respect to fuel gas flow through the pre-filter unit. The inlet valve permits and prevents gas flow into the housing and has a valve head that opens and closes an inlet port. The outlet valve permits and prevents gas flow out of the housing and eventually to a vehicle fuel gas storage tank. The outlet valve has a valve head that opens and closes an outlet port.

主权项

1. A vehicle fuel gas pre-filter unit, comprising:
a housing having an inlet port and an outlet opening; a filter located in the housing between the inlet port and the outlet opening; a first valve head situated adjacent the inlet port and mating with the inlet port when the first valve head is brought to a closed state; and a valve stem extending from the first valve head and engageable with a second valve head that closes an outlet port of a valve body, the second valve head and valve body permitting and preventing gas flow out of the vehicle fuel gas pre-filter unit; wherein, in installation, the outlet opening of the housing is mated with the valve body, and wherein, in operation, when the first valve head is brought to an open state the second valve head is also brought to an open state via the engagement between the valve stem and the second valve head.