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Fuel delivery system for vehicles

A technology of fuel delivery and fuel, which is applied in the direction of charging system, components of pumping device for elastic fluid, fuel injection control, etc., and can solve problems such as filter burst

Active Publication Date: 2017-02-22
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In case of excessive pressure, the filter may burst

Method used

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  • Fuel delivery system for vehicles
  • Fuel delivery system for vehicles

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Embodiment Construction

[0027] figure 1 A fuel delivery system 10 for a motor vehicle is shown, which has a high-pressure pump 12 and a pre-feed pump 14 . A fuel filter 16 is arranged between the high-pressure pump 12 and the prefeed pump 14 . In normal operation, the pre-delivery pump delivers fuel from an input line 18 connected to the vehicle's fuel tank (eg via a filter) and compresses the fuel to operating pressure, which is supplied to the fuel filter 16 via line 20 . The pre-compressed fuel is supplied via a line 22 to a high pressure pump 12 which compresses said fuel to over 1000 bar and is supplied via a further line 24 to the common rail system of the vehicle.

[0028] The delivery rate of the high-pressure pump 12 can be adjusted by means of a measuring unit 26 which is arranged on the high-pressure pump in a line 28 from the inlet 22 of the high-pressure pump to the suction valve 30 .

[0029] Between the suction valve 30 and the measuring cell 26 , a return line 32 is connected to th...

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Abstract

The invention relates to a fuel delivery system (10) for a vehicle, comprising a pre-delivery pump (14) for pumping fuel out of a tank (100), a high-pressure pump (12) for feeding the fuel to a common rail system (24), and a filter (16) between the pre-delivery pump (14) and the high-pressure pump (12) for filtering the fuel. The pre-delivery pump (14) can be regulated, said pre-delivery pump (14) being regulated on the basis of a first fuel pressure upstream of the filter (16) and a second fuel pressure downstream of the filter (16).

Description

technical field [0001] The invention relates to the field of common rail injection systems. In particular, the invention relates to a fuel delivery system for a vehicle. Background technique [0002] Currently, many vehicles have a common rail injection system for an injection system of an internal combustion engine, wherein a high-pressure pump pumps fuel, for example diesel, to a high pressure level. Fuel under pressure fills the pipe system to which the nozzles are commonly connected and which is continuously under pressure during operation of the engine. [0003] Different pre-delivery pumps can be used for the pressure source of the high pressure pump. In the field of production vehicles the fuel is usually supplied to the high-pressure pump by means of a mechanically driven constant delivery pump (gear pump or vane pump). Because of hot starts and idle flow requirements, the prefeed pumps are often significantly oversized for normal operating speeds. [0004] Speed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/38F02D33/00F02M37/04F02M37/00F04B49/00F04B53/20F04C14/22F04C2/344
CPCF02D41/3854F02D33/003F02D41/22F02M37/0023F02M37/0052F02M37/045F04B53/20F04C2/3442F04C14/223
Inventor A·克尔纳
Owner ROBERT BOSCH GMBH
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