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US 4,377,147 AGranted
Internal combustion engine
AssigneeDaimler-Benz Aktiengesellschaft
InventorsHorst Bergmann, Hans Pracht, Klaus-Dieter Holloh
Life of this patent
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AssigneeDaimler-Benz Aktiengesellschaft
InventorsHorst Bergmann, Hans Pracht, Klaus-Dieter Holloh
Estimating the term…
An internal combustion engine driven by a gaseous fuel, with quantity regulation in a lower load range and quality regulation in an upper load range. A gas pressure regulator is provided for controlling a gas flow to an air-gas mixer, with a throttle valve actuatable by an accelerator pedal being arranged in an intake line downstream of the air-gas mixer, whereby the gas pressure regulator is movable in a closing direction through a control line, by a diaphragm by vacuum prevailing in the intake line in a vicinity of the throttle valve. A control valve, influenced by the accelerator in the quality control range, is disposed in a control line. The control line branches off the intake line upstream of the throttle valve or off the air-gas mixer. A throughput or through-flow cross section in the control valve decreases with increasing loads in a direct relationship to a position of the accelerator until the control valve closes at full load. The control line between the control valve and gas pressure regulator is connected to outside air through a fixed throttle.
An internal combustion engine powered by a gaseous fuel, the engine comprising air intake means, an air-fuel mixer means arranged in the air intake means, a fuel pressure regulator means for controlling a flow of fuel to the mixer means, throttle valve means actuatable by an accelerator means arranged in the intake means downstream of the air-fuel mixer means, and means for regulating a quantity of fuel supplied to the engine during a low load operation of the engine and for regulating a quality of fuel during an upper load range of operation of the engine, characterized in that the means for regulating the quantity and quality of fuel includes a control line means branching off from the air intakemeans at a position upstream of the throttle valve means and adapted to be subjected to the vacuum prevailing at that position of the air intake means, a control valve means arranged in the control line means for controlling the fuel pressure regulator means, means for connecting the accelerator means with the control valve means for controlling a through-flow cross section of the control valve means in a direct relationship to a position of the accelerator means, and means for venting the control line means to outside air.
Dependencies are inferred from the claim text.