Valve arrangement for gas pressure regulation, fuel system with valve arrangement for gas pressure regulation, method for gas pressure regulation in a gas rail

摘要

The invention relates to a valve arrangement (1) for gas pressure regulation in a gas rail (2) of a fuel system for supplying an internal combustion engine with a gaseous fuel, in particular natural gas, comprising a first valve (3) for connecting the gas rail (2) a gas high-pressure accumulator (4) and a second valve (5) for connecting the gas rail (2) with a gas return (6), wherein at least the first valve (3) is designed as a seat valve. According to the invention a third valve (7) is provided, which is designed as a slide valve and connected in series with the first valve (3), so that the third valve (7) closes in time before the first valve (3). The invention further relates to a fuel system with a valve arrangement (1) according to the invention for gas pressure regulation in a gas rail (2) and a method for gas pressure regulation in a gas rail (2).