| 摘要 |
A valve for bringing gaseous fuel into the combustion chamber of gas engines is provided with a solenoid valve (8) controlling fuel delivery (7) and an adjoining poppet valve (2), which closes biased by the force of a spring, and which opens in the direction of the combustion chamber through the pressure of in-flowing gas. For the purpose of keeping the poppet valve (2) open, independent from the pressure conditions at its valve head (3), the valve's stem (4) is connected to a step piston (6) whose topside and bottom side are biased by the fuel pressure existing between the solenoid valve (8) and the valve head (3) and whose step area (12) is in communication with the fuel delivery line (7), on one side, and with the space (11) between the step piston (6) and the valve head (3), on the other side, whereby the passageways (15, 15', 17, 17') are opened and closed by means of a respective switching member (13, 14, 20) corresponding to the movement of the step piston (6). The poppet valve (2) is thereby kept in a closed position, assisted by pressure, after the end of the gaseous fuel injection.
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