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US 5,397,061 AGranted
Apparatus for injecting a fuel-gas mixture
AssigneeRobert Bosch GmbH
InventorsJuergen Buchholz, Ferdinand Reiter, Martin Maier
Life of this patent
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AssigneeRobert Bosch GmbH
InventorsJuergen Buchholz, Ferdinand Reiter, Martin Maier
Estimating the term…
Apparatuses for the injection of a fuel-gas mixture that have a cup-shaped gas enveloping sleeve that surrounds a valve end of a fuel injection valve, in which the base of the gas enveloping sleeve rests directly on a valve end of the fuel injection valve, have already been proposed. In such apparatuses, the danger is that the perforated body, which has injection ports, will be damaged during installation of the gas enveloping sleeve. In the novel apparatus, however, an elastic sealing element is disposed in the direction of the longitudinal valve axis between the valve end of the fuel injection valve and an end of the base portion of the gas enveloping sleeve that faces the valve end. This sealing element lessens the danger of deformation of and damage to a perforated body, having injection ports, of the fuel injection valve at the valve end and makes it possible to compensate for production and installation tolerances. The proposed apparatus for injecting a fuel-gas mixture is especially suitable for mixture-compressing internal combustion engines having externally supplied ignition.
An apparatus for the injection of a fuel-gas mixture, having a fuel injection valve that has a valve end with at least one injection port and a longitudinal valve axis, and further having a single piece cup-shaped gas enveloping sleeve (1) that includes a casing portion (9) that encloses the valve end (5) of the fuel injection valve axially at least in part and an integral base portion (11) that encloses said valve end radially at least in part, the gas enveloping sleeve is provided with at least one gas feed opening (81) and a mixture injection port (13) on its base portion, and an elastic sealing element (83) is disposed in a direction of the longitudinal valve axis (3) and is fastened between the valve end (5) of the fuel injection valve (7) and an inner most end (38) of the base portion (11) of the gas enveloping sleeve (1) which faces the valve end (5) to avoid contact between said valve end (5) and said base portion (11).
An apparatus for the injection of a fuel-gas mixture, having a fuel injection valve that has a valve end with at least one injection port and a longitudinal valve axis, and further having a single piece cup-shaped gas enveloping sleeve (1) that includes a casing portion (9) that encloses the valve end (5) of the fuel injection valve axially at least in part and an integral base portion (11) that encloses said valve end radially at least in part, said base portion (11) of the gas enveloping sleeve (1) is slanted obliquely toward the valve end (5) of the fuel injection valve (7) in the direction of the longitudinal valve axis (3), the gas enveloping sleeve is provided with at least one gas feed opening (81) and a mixture injection port (13) on its base portion, and an elastic sealing element (83) is disposed in a direction of the longitudinal valve axis (3) and is fastened between the valve end (5) of the fuel injection valve (7) and an end (38) of the base portion (11) of the gas enveloping sleeve (1) which faces the valve end (5).
Dependencies are inferred from the claim text.