Gas pressure regulator for regulating the pressure of a gaseous fuel, system for supplying an internal combustion engine with gaseous fuel by using such a gas pressure regulator, and method for operating said system
A technology of gas pressure and gaseous fuel, applied in the direction of charging system, internal combustion piston engine, combustion engine, etc., can solve the problems of expensive, laborious, and reduce system efficiency, and achieve the effect of low cost, simple and cost
Active Publication Date: 2020-07-14
ROBERT BOSCH GMBH
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Problems solved by technology
Sealing against one another with high pressure differences of several hundred bar is technically very complex and such gas pressure regulators are correspondingly expensive and reduce the efficiency of the entire system
Method used
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Embodiment Construction
[0022] figure 1 A system of the invention for supplying a gaseous fuel to an internal combustion engine is shown. The system is designed to supply both gaseous fuel and liquid fuel to the injector, which can then introduce the two fuels simultaneously or with a time offset into the combustion chamber of the internal combustion engine. To this end, the system includes gas systems and liquid systems. exist figure 1The gas system denoted by A has a gas tank 100 in which gaseous fuel is preferably stored cryogenically and in which a low pressure exists. The gaseous fuel is compressed by the gas pump 150 and supplied via the line 101 to the intermediate tank 200 where the gaseous fuel is intermediately stored. The gaseous fuel is supplied via line 201 to the gas pressure regulator 1, which regulates the gas pressure to the desired level and finally to the gas rail 400, where the gaseous fuel is maintained by injection into the combustion chamber of the internal combustion engine...
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The invention relates to a gas pressure regulator (1) for regulating the pressure of a gaseous fuel, having a housing (2) in which a longitudinally movable gas piston (3) is arranged, which delimits agas chamber (5) and a pressure chamber (7) that can be filled with a working liquid, wherein the gas piston (3) has a first seal (24) running around the outside of the gas piston, by means of which seal the gas piston (3) is guided in a sealing manner in the housing (2) and which seals off the gas chamber (5). As a result of the interaction of the gas piston (3) with a valve seat (21), a controlvalve (20) is formed, via which gas can be led out of the gas chamber (5). Formed on the outside of the gas piston (3) is a second circumferential seal (25), by means of which the gas piston (3) is likewise guided in a sealing manner in the housing (2), wherein the gas piston (3) is at least partly surrounded by a low-pressure gas chamber (9) and the second seal (25) separates the low-pressure gaschamber (9) from a gas return chamber (10), wherein the gas chamber (5) can be connected to the gas return chamber (10) via the control valve (20). The invention further relates to a system for supplying an internal combustion engine with gaseous fuel, which system has an intermediate tank (200) and such a gas pressure regulator (1). In a method for operating said system, there is also a return reservoir (300), the pressure of which is set between the pressure in the gas chamber (5) and in the gas tank (100).
Description
technical field [0001] The invention relates to a gas pressure regulator for regulating the pressure of a gaseous fuel, as the gas pressure regulator is used to supply a gaseous fuel at a predetermined pressure to an internal combustion engine. Furthermore, the device relates to a system for supplying a gaseous fuel to an internal combustion engine using such a gas pressure regulator and a method for operating the system. Background technique [0002] A gas pressure regulator for supplying an internal combustion engine with gaseous fuel at a certain pressure is known from the prior art, for example from DE 10 2016 207 743 A1. Such systems have a gas tank from which gaseous fuel is removed by means of a gas pump. The gas pump compresses gas and supplies it to the intermediate tank. A further gas accumulator, the so-called gas rail, is fed from the intermediate tank, in which the gaseous fuel is maintained at a predetermined pressure in order to be finally introduced into th...
Claims
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IPC IPC(8): F02M21/02F16K31/124F02D19/06
CPCF02M21/0293F02M21/0239F02M21/0245F02D19/023F02D19/0642F02D19/0678F02M21/0233Y02T10/30
Inventor A·谢尔D·瓦勒
Owner ROBERT BOSCH GMBH
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