Dual-fuel valve

A method for making a valve for flowing gaseous fuel to an internal combustion engine including:

• providing a valve body having (a) an inlet passage, (b) an outlet path in flow communication with the inlet passage, and (c) a seat in the outlet path;
• threading an adjustment member into the body to a position abutting the seat;
• rotating the adjustment member away from the seat through at least a fraction of a turn;
• and
• affixing a component to the valve to limit rotation of the adjustment member;
• connecting the valve between a source of natural gas and an engine;
• running the engine;
• and
• trimming the adjustment member to provide maximum engine horsepower while yet limiting engine exhaust emission to a maximum predetermine emission level.

A method for making a valve for flowing gaseous fuel to an internal combustion engine including:

• providing a valve body having (a) an inlet passage, (b) a first outlet path in flow communication with the inlet passage, (c) a seat in the outlet path, and (d) a second outlet path in flow communication with the inlet passageway;
• threading an adjustment member into the body to a position abutting the seat;
• rotating the adjustment member away from the seat through at least a fraction of a turn;
• and
• attaching two spaced-apart abutments to the valve body to limit rotation of the adjustment member.

A method for making a valve for flowing gaseous fuel to an internal combustion engine including:

• providing a valve body having (a) an inlet passage, (b) a first outlet path in flow communication with the inlet passage, (c) a seat in the outlet path;
• and (d) a second outlet path in flow communication within the inlet passage;
• blocking one of the outlet paths by placing an aperture device in the second outlet path;
• threading an adjustment member into the body to a position abutting the seat;
• rotating the adjustment member away from the seat through at least a fraction of a turn;
• and
• affixing a component to the valve to limit rotation of the adjustment member.

A method for making a valve for flowing gaseous fuel to an internal combustion engine including:

• providing a valve body having (a) an inlet passage, (b) an outlet path in flow communication with the inlet passage, and (c) a seat in the outlet path, the seat being formed on a jet device fixed in the body and the same jet device is used, irrespective of the displacement of the engine;
• selecting an adjustment member from among plural adjustment members having differing respective nose portions in view of the displacement of the engine;
• threading the selected adjustment member into the body to a position abutting the seat, the selected adjustment member including a tapered nose portion;
• rotating the selected adjustment member away from the seat through at least a fraction of a turn;
• and
• affixing a component to the valve to limit rotation of the selected adjustment member.