Hydraulic servo gas regulator for multi-fuel engine
First Claim
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1. A variable pressure gaseous fuel supply system for an engine capable of burning liquid and gaseous fuels individually or simultaneously comprising:
- (a) a source of fuels such as natural gas and hydrogen pressurized to approximately 200 psi or higher piped to;
(b) a variable gaseous fuel pressure regulator incorporating;
(c) an attached hydraulically amplifying servo actuator henceforth referred to as a hydraulic amp which contains a hydraulic pressure sensing chamber variably pressurized through an orifice in said hydraulic amp communicating with;
(d) a variable pressure hydraulic servo pressure circuit wherein;
(e) pressurized hydraulic servo fluid is isolated from yet mechanically communicable with the load governing side of the gaseous fuel pressure regulator'"'"'s internal pressure sensing element and connected flow control valve by a piston-pushrod structure contained within said attached hydraulic amp, said piston-pushrod having at one end a relatively large pressure sensing piston crown communicating with said hydraulic pressure sensing chamber, and at the opposite end a relatively smaller surface that abuts and transmits variable hydraulic servo pressure to said gaseous fuel pressure regulator'"'"'s internal pressure sensing element and connected flow control valve, whereby said larger diameter piston crown of said piston-pushrod amplifies the pressure of the hydraulic servo fluid against the abutting smaller diameter regulator sensing element, thereby producing a proportionately a higher, variable pressure fuel flow from the gaseous pressure regulator.
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Abstract
A bi-fuel and dual-fuel engine variable pressure fuel system is presented facilitating individual or simultaneous use of liquid and gaseous fuels including natural gas, hydrogen and gasoline, through employment of a variable output pressure gaseous fuel regulator incorporating an attached hydraulic amplifying structure communicating with a relatively low pressure fluid servo circuit that may in turn communicate with a variable pressure automotive liquid fuel system to facilitate relatively high pressure gaseous fuel injection.
18 Citations
20 Claims
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1. A variable pressure gaseous fuel supply system for an engine capable of burning liquid and gaseous fuels individually or simultaneously comprising:
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(a) a source of fuels such as natural gas and hydrogen pressurized to approximately 200 psi or higher piped to; (b) a variable gaseous fuel pressure regulator incorporating; (c) an attached hydraulically amplifying servo actuator henceforth referred to as a hydraulic amp which contains a hydraulic pressure sensing chamber variably pressurized through an orifice in said hydraulic amp communicating with; (d) a variable pressure hydraulic servo pressure circuit wherein; (e) pressurized hydraulic servo fluid is isolated from yet mechanically communicable with the load governing side of the gaseous fuel pressure regulator'"'"'s internal pressure sensing element and connected flow control valve by a piston-pushrod structure contained within said attached hydraulic amp, said piston-pushrod having at one end a relatively large pressure sensing piston crown communicating with said hydraulic pressure sensing chamber, and at the opposite end a relatively smaller surface that abuts and transmits variable hydraulic servo pressure to said gaseous fuel pressure regulator'"'"'s internal pressure sensing element and connected flow control valve, whereby said larger diameter piston crown of said piston-pushrod amplifies the pressure of the hydraulic servo fluid against the abutting smaller diameter regulator sensing element, thereby producing a proportionately a higher, variable pressure fuel flow from the gaseous pressure regulator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A variable pressure gaseous fuel supply system for an engine capable of burning liquid and gaseous fuels individually or simultaneously comprising:
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(a) a source of fuels such as natural gas and hydrogen pressurized to approximately 200 psi or higher piped to; (b) a variable gaseous fuel pressure regulator incorporating; (c) an attached hydraulically amplifying servo actuator henceforth referred to as a hydraulic amp which contains a hydraulic pressure sensing chamber variably pressurized through an orifice in said hydraulic amp communicating with; (d) a variable pressure hydraulic servo pressure circuit wherein; (e) pressurized hydraulic servo fluid is isolated from yet mechanically communicable with the load governing side of the gaseous fuel pressure regulator'"'"'s internal pressure sensing element and connected flow control valve by a piston-pushrod structure contained within said attached hydraulic amp, said piston-pushrod having at one end a relatively large pressure sensing piston crown communicating with said hydraulic pressure sensing chamber, and at the opposite end a relatively smaller surface that abuts and transmits variable hydraulic servo pressure to said gaseous fuel pressure regulator'"'"'s internal pressure sensing element and connected flow control valve, whereby said larger diameter piston crown of said piston-pushrod amplifies the pressure of the hydraulic servo fluid against the abutting smaller diameter regulator sensing element, thereby producing a proportionately a higher, variable pressure fuel flow from the gaseous pressure regulator; and (f) two stage operation provided through a moveable pressure sensing collar that selectively increases the pressure amplifying surface area of said piston crown of said piston-pushrod. - View Dependent Claims (20)
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Specification