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US 10,208,711 B2Granted
Gas injector including an outwardly opening valve closure element
AssigneeRobert Bosch GmbH
InventorsFriedrich Moser, Guenther Hohl, Michael Knorpp, Olaf Schoenrock
Life of this patent
Estimating the term…
Abstract
A gas injector for directly injecting a gaseous fuel into a combustion chamber of an internal combustion engine, including a valve closure element for releasing and closing a passage opening, the valve closure element opening in the direction of a flow direction of the gas injector, a sealing seat between the valve closure element and a valve body, a flow-guiding element being situated downstream of the sealing seat in the flow direction of the gas injector and configured to form a gas jet to be injected into the combustion chamber.
Claims24
A gas injector for directly injecting a gaseous fuel into a combustion chamber of an internal combustion engine, comprising:
- a valve body;
- and
- a valve closure element for releasing and closing a passage opening, the valve closure element opening in a direction of a flow direction of the gas injector;
- wherein:
- a sealing seat is formed between the valve closure element and the valve body;
- a flow-guiding element is situated downstream of the sealing seat in the flow direction of the gas injector, and is configured to form a gas jet to be injected into the combustion chamber;
- and
- at least one of:
- the flow-guiding element includes a surface that (a) extends to an exit end opening of the gas injector from which the fuel, flowing in the flow direction, can exit the gas injector and (b) is shaped such that, upon the exit of the fuel from the fuel injector through the exit end opening, the fuel exits as the gas jet having a center axis that is at a non-straight angle to a longitudinal axis of the gas injector, and at least a portion of the valve closure member, in a direction parallel to the longitudinal axis, overlies at least a portion of the exit end opening of the gas injector;
- the flow-guiding element is a cap capping, and formed as a separate element from, the valve body and includes:
- (i) a surface that (a) faces opposite the flow direction, (b) extends perpendicular to the longitudinal axis of the gas injector, and (c) sits flush against a bottom surface of the valve body;
- and
- (ii) a radially interior surface that is at a non-straight angle to the bottom surface of the valve body and at a non-straight angle to the longitudinal axis;
- and
- the flow-guiding element includes a radially exterior surface and a radially interior surface formed by a radially exterior surface of the valve closure element, the radially exterior and interior surfaces of the flow-guiding element are shaped such that, when fuel exits the gas injector, the radially exterior and interior surfaces of the flow-guiding element shape the fuel into the gas jet including an exterior-most circumference of the gas jet and an interior most circumference of the gas jet surrounding a hollow.
12 more elements
An internal combustion engine, comprising:
- a cylinder head;
- a gas injector situated directly on a combustion chamber and in the cylinder head, the gas injector for directly injecting a gaseous fuel into the combustion chamber, the gas injector including:
- a valve body;
- and
- a valve closure element for releasing and closing a passage opening, the valve closure element opening in a direction of a flow direction of the gas injector;
- wherein:
- a sealing seat is formed between the valve closure element and the valve body;
- a flow-guiding element is situated downstream of the sealing seat in the flow direction of the gas injector, and is configured to form a gas jet to be injected into the combustion chamber;
- and
- at least one of:
- the flow-guiding element includes a surface that (a) extends to an exit end opening of the gas injector from which the fuel, flowing in the flow direction, can exit the gas injector and (b) is shaped such that, upon the exit of the fuel from the fuel injector through the exit end opening, the fuel exits as the gas jet having a center axis that is at a non-straight angle to a longitudinal axis of the gas injector, and at least a portion of the valve closure member, in a direction parallel to the longitudinal axis, overlies at least a portion of the exit end opening of the gas injector;
- the flow-guiding element is a cap capping, and formed as a separate element from, the valve body and includes:
- (i) a surface that (a) faces opposite the flow direction, (b) extends perpendicular to the longitudinal axis of the gas injector, and (c) sits flush against a bottom surface of the valve body;
- and
- (ii) a radially interior surface that is at a non-straight angle to the bottom surface of the valve body and at a non-straight angle to the longitudinal axis;
- and
- the flow-guiding element includes a radially exterior surface and a radially interior surface formed by a radially exterior surface of the valve closure element, the radially exterior and interior surfaces of the flow-guiding element are shaped such that, when fuel exits the gas injector, the radially exterior and interior surfaces of the flow-guiding element shape the fuel into the gas jet including an exterior-most circumference of the gas jet and an interior most circumference of the gas jet surrounding a hollow.
14 more elements
Dependencies are inferred from the claim text.