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Valve for injecting gaseous fuel

A gaseous fuel and nozzle needle technology, applied in the direction of charging system, combustion engine, internal combustion piston engine, etc., can solve the problems of increasing cost, energy consumption, and large space occupation

Active Publication Date: 2019-03-01
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to overcome said force, the actuator has to be implemented significantly larger, however, this is not desirable due to the greater space occupation in the gas valve
Furthermore, said actuators increase the cost and energy consumption of the overall system

Method used

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  • Valve for injecting gaseous fuel
  • Valve for injecting gaseous fuel
  • Valve for injecting gaseous fuel

Examples

Experimental program
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Effect test

Embodiment Construction

[0024] exist Figure 1a The valve according to the invention is schematically shown in longitudinal section in . The valve 1 has a valve housing 2 which includes a solenoid coil 13 . A pressure chamber 24 is formed inside the valve housing 2 , which can be filled with gaseous fuel via at least one supply channel 11 . Furthermore, the valve housing 2 has at least one injection opening 3 through which gaseous fuel can flow out of the pressure chamber 24 into the combustion chamber of the internal combustion engine or into the intake system of the internal combustion engine. Furthermore, a longitudinally movable, piston-like nozzle needle 4 and a solenoid armature 12 are arranged in the pressure chamber 24 , wherein the nozzle needle 4 and the solenoid armature 12 are fixedly connected to one another. The nozzle needle 4 has a longitudinal bore 23 and a transverse bore 28 , through which the gaseous fuel can flow in the direction of the at least one injection opening 3 . A clos...

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PUM

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Abstract

The invention relates to a valve (1) for injecting gaseous fuel comprising a valve housing (2) in which a pressure chamber (24) that can be filled with gaseous fuel is formed. A longitudinally moveable piston-type nozzle needle (4) is arranged in this pressure chamber (24), on which a first seal seat (19, 19', 19", 19"') is formed, with which the nozzle needle (4) cooperates with a shoulder (9, 9', 9", 9"') formed on the valve housing (2) for opening and closing a flow cross-section of gaseous fuel. A high-pressure region (16) and a low-pressure region (17) are also formed in the pressure chamber (24). In addition, a second seal seat (18, 18', 18", 18"') is formed on a valve element (5), which is arranged axially offset to the first seal seat (19, 19', 19", 19"') relative to a longitudinalaxis (10) of the valve (1). The valve element (5) is supported on an elastic element (7), wherein this elastic element (7) separates the high-pressure region (16) from the low-pressure region (17).

Description

technical field [0001] The invention relates to a valve, such as is preferably used for injecting gaseous fuel into a combustion chamber of an internal combustion engine or into an intake system of an internal combustion engine. Background technique [0002] The invention relates to a valve for injecting gaseous fuels, as is known, for example, from laid-open document DE 10 2014 212 320 A1. Such a gas valve has a valve disk and a valve plate with a valve seat formed therein, wherein the valve disk cooperates with the valve seat for opening and closing the gas valve. Large inflow cross-sections can be opened and closed relatively quickly by the stroke of the valve disc. [0003] Typically, known gas valves are suitable for injecting gaseous fuels with low pressures below 30 bar. The movement of the closing element in the gas-filled pressure chamber is usually accomplished by piezoelectric actuators or electromagnets, which act directly on the nozzle needle. If significantl...

Claims

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Application Information

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IPC IPC(8): F02M21/02
CPCF02M21/0254F02M21/0266F02M21/0272Y02T10/30
Inventor B·施图克O·奥尔哈费尔F·耶格F·艾贝格尔
Owner ROBERT BOSCH GMBH