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Fuel delivery device for cryogenic fuels, method for operating a fuel delivery device for cryogenic fuels

A low-temperature fuel and fuel delivery technology, which is applied to pump devices, oil supply devices, charging systems, etc., can solve the problems of the efficiency of the fuel delivery device and the large size of the pre-delivery pump, so as to reduce the installation space requirement and reduce the Effect of Pipeline Diameter

Active Publication Date: 2022-06-24
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This means that the prefeed pump is often overdimensioned, which has a negative effect on the efficiency of the fuel delivery device

Method used

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  • Fuel delivery device for cryogenic fuels, method for operating a fuel delivery device for cryogenic fuels
  • Fuel delivery device for cryogenic fuels, method for operating a fuel delivery device for cryogenic fuels
  • Fuel delivery device for cryogenic fuels, method for operating a fuel delivery device for cryogenic fuels

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Embodiment Construction

[0024] exist figure 1 The fuel delivery device according to the invention shown in comprises a pre-feed pump 1 and a high-pressure pump 2 , wherein the pre-feed pump 1 is currently arranged in the bottom region of a tank 15 for storing low-temperature fuel. There is a liquid phase 16 of the fuel, which is covered by a gas phase 17 of the fuel. The arrangement of the pre-feed pump 1 in the tank 15 has the advantage that the structural outlay for connecting the pre-feed pump 1 to the high-pressure pump 2 is reduced, since only the low-pressure line 18 needs to be led out of the tank 15 . The pre-feed pump 1 can in particular be embodied as a side channel pump or a centrifugal pump.

[0025] The additionally provided high-pressure pump 2 is embodied as a single-piston pump. The single-piston pump has a compression chamber 4 which is bounded by a reciprocating piston 3 and which can be filled with cryogenic fuel via a suction valve 5 . Here, the fuel is drawn from a low-pressur...

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Abstract

The invention relates to a delivery device for cryogenic fuel, which comprises a pre-delivery pump (1) and a high-pressure pump (2), wherein the high-pressure pump (2) has a reciprocating piston (3), which delimits Compression chamber (4). According to the invention, said compression chamber (4) can be connected via a suction valve (5) with a low pressure storage volume (6) which can be filled with cryogenic fuel by said prefeed pump (1). The invention also relates to a method for operating a fuel delivery device for cryogenic fuels.

Description

technical field [0001] The present invention relates to a fuel delivery device for cryogenic fuels. The invention also relates to a method for operating a fuel delivery device for cryogenic fuels. [0002] The cryogenic fuel can in particular be natural gas (“Natural Gas”=NG), which is stored in liquid form (“Liquefied Natural Gas”=LNG: liquefied natural gas) on motor vehicles in tanks specially designed for this purpose. Background technique [0003] Low-temperature fuel, such as natural gas, is compressed by means of a high-pressure pump before being blown into the combustion chamber of an internal combustion engine. The high-pressure pump can be designed as a piston pump, in particular as a volume-unbalanced single-piston pump, so that undesired volume or pressure fluctuations occur, especially in the low-pressure region of the high-pressure pump. [0004] In order to supply the high-pressure pump with low-temperature fuel, a pre-feed pump can be provided, which is gene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M21/02F04B11/00F04B9/08
CPCF04B9/08F04B11/0008F02M21/0215F02M21/0221F02M21/0239F02M21/0245F04B19/24F04B23/103F04B23/02F04B2015/081F04B15/08F04B11/0033Y02T10/30F04B23/14
Inventor D·施尼特格A·贝特M·菲尔挨克
Owner ROBERT BOSCH GMBH
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