Intelligent control of motor vehicle gas equipment
First Claim
1. In a device for the control of a carburetor unit for a gaseous fuel, for an internal combustion engine, comprising a vaporizer/pressure regulator for the supply of gas at a pressure near the air pressure upstream of the carburetor unit, a venturi type mixing device for mixing the gas with combustion air sucked in by a said internal combustion engine, a connecting line for connecting the vaporizer/pressure regulator to said mixing device, a main throttle valve for the intake of combustion air to control the engine output, said main throttle valve being adapted to be coupled to an accelerator pedal and being situated upstream of said mixing device, and a regulating valve in said connecting line for regulating the quantity of gas supplied to the mixing device, said regulating valve being coupled to said main throttle valve;
- the improvement comprising a mixing air supply device in said connecting line between said vaporizer/pressure regulator and said regulating valve, said supply device comprising a further venturi and an annular channel having a throat through which said gas flows between said vaporizer/pressure regulator and said regulating valve, a mixing air supply pipe that supplies air to said air supply device, said further venturi sucking said mixing air into said annular channel, a mixing air regulating valve in said mixing air supply pipe, the first-mentioned regulating valve being so dimensioned as to be adapted to supply too rich a gas/air mixture to the engine, and correction means controlling the opening of said mixing air regulating valve to dilute said gas with mixing air, thereby to supply to the engine a leaner gas/air mixture.
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Accused Products
Abstract
Device for the intelligent control of a venturi-type carburettor unit for a gaseous fuel, including a pressure regulator, a main throttle valve in the airsuction pipe for control of the engine output and a regulating valve in the gas supply pipe between the pressure regulator and the venturi, this valve being coupled to the main throttle valve. By adjusting this mechanical system for providing a too rich air-fuel-mixture under all conditions, only mirror adjustments of the mixture are necessary to provide the engine with the correct mixture required for each load/speed condition. These requirements are stored in a processor, and the latter controls the necessary corrections of the mixture by diluting the gasflow to the main venturi with some air. To this end a small venturi is placed in the gaspipe, the gasflow sucking the diluting air through a mixing air regulating valve, which valve is controlled by the processor in a continuous, analogic intelligent way. Optionally an O2 -sensor placed in the exhaust gases may send feed-back signals to the processor.
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Citations
5 Claims
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1. In a device for the control of a carburetor unit for a gaseous fuel, for an internal combustion engine, comprising a vaporizer/pressure regulator for the supply of gas at a pressure near the air pressure upstream of the carburetor unit, a venturi type mixing device for mixing the gas with combustion air sucked in by a said internal combustion engine, a connecting line for connecting the vaporizer/pressure regulator to said mixing device, a main throttle valve for the intake of combustion air to control the engine output, said main throttle valve being adapted to be coupled to an accelerator pedal and being situated upstream of said mixing device, and a regulating valve in said connecting line for regulating the quantity of gas supplied to the mixing device, said regulating valve being coupled to said main throttle valve;
- the improvement comprising a mixing air supply device in said connecting line between said vaporizer/pressure regulator and said regulating valve, said supply device comprising a further venturi and an annular channel having a throat through which said gas flows between said vaporizer/pressure regulator and said regulating valve, a mixing air supply pipe that supplies air to said air supply device, said further venturi sucking said mixing air into said annular channel, a mixing air regulating valve in said mixing air supply pipe, the first-mentioned regulating valve being so dimensioned as to be adapted to supply too rich a gas/air mixture to the engine, and correction means controlling the opening of said mixing air regulating valve to dilute said gas with mixing air, thereby to supply to the engine a leaner gas/air mixture.
- View Dependent Claims (2, 3, 4, 5)
Specification