Gas injector for the direct injection of gaseous fuel into a combustion chamber
AssigneeRobert Bosch GmbH
InventorsFelix Jaegle, Olaf Ohlhafer, Joerg Schoefer, Robert Giezendanner-Thoben
Life of this patent
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Abstract
A gas injector for the direct injection of gaseous fuel into a combustion chamber of an internal combustion engine, including a valve seat, a valve needle, which in response to a lift releases a first cross-sectional area at the valve seat, and a gas control region, which is situated at the valve needle and defines a second cross-sectional area together with a component surrounding the valve needle, and in response to a lift, a change in the first cross-sectional area at the valve seat differs from a change in the second cross-sectional area at the gas control region.
Claims19
A gas injector for directly injecting gaseous fuel into a combustion chamber of an internal combustion engine, comprising:
- a valve seat;
- a valve needle, which releases a first cross-sectional area at the valve seat in a lift;
- and
- a gas control region situated at the valve needle and which defines a second cross-sectional area together with a component surrounding the valve needle;
- wherein in response to a lift, a change in the first cross-sectional area at the valve seat differs from a change in the second cross-sectional area at the gas control region, and
- wherein downstream from the gas control region in a flow direction, the gas injector has a space having a larger radius than a radius of the valve seat, so that once a predefined lift has occurred at the gas control region, the gas control region has no effect on an overall cross-sectional area for the injection of the gaseous fuel.
Dependencies are inferred from the claim text.