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High-pressure pump

A technology of high-pressure pumps and drive shafts, which is applied in the direction of pumps, multi-cylinder pumps, liquid displacement machines, etc., can solve problems such as large fuel consumption, and achieve the effect of reducing fuel consumption and reducing mass

Inactive Publication Date: 2015-01-14
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the drive shaft has a large mass and, when the high-pressure pump is installed in the motor vehicle, th

Method used

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Examples

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Embodiment Construction

[0032] exist figure 1 A cross-section of the high-pressure pump 1 for the high-pressure injection system 36 is shown in . The high-pressure pump 1 serves to deliver fuel, such as gasoline or diesel, to the internal combustion engine 39 at high pressure. The pressure that can be generated by the high-pressure pump 1 lies, for example, in the range between 1000 and 3000 bar.

[0033] The high-pressure pump 1 has a drive shaft 2 with two cams 3 , which executes a rotational movement about an axis of rotation 26 . The axis of rotation 26 which is at the same time the longitudinal axis 26 of the drive shaft 2 lies figure 1 in the legend plane of and with figure 2 The legend plane is vertical. The piston 5 is mounted in a cylinder 6 as a piston guide 7 , which is formed by a housing 8 . Cylinder 6 , housing 8 and piston 5 delimit a working chamber 29 . An inlet channel 22 with an inlet valve 19 and an outlet channel 24 with an outlet valve 20 open into a working chamber 29 . ...

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Abstract

The invention relates to a high-pressure pump (1) for conveying a fluid, particularly fuel such as diesel, and comprising: a drive shaft (2) that has at least one cam (3); at least one piston (5); and at least one cylinder (6) for mounting said at least one piston (5), the at least one piston (5) being indirectly supported, by means of at least one running roller (10), on the drive shaft (2) that has the at least one cam (3) such that a translational movement can be carried out by the at least one piston (5) based on a rotational movement of the drive shaft (2), and said at least one drive shaft (2) with the at least one cam (3) being in the form of a hollow shaft (2) comprising at least one cavity so as to reduce the mass of the at least one drive shaft (2).

Description

[0001] The invention relates to a high-pressure pump according to the preamble of claim 1 and a high-pressure injection system according to the preamble of claim 10 . Background technique [0002] In high-pressure injection systems for internal combustion engines, in particular common-rail injection systems for diesel or gasoline engines, the high-pressure pump is continuously responsible for maintaining the pressure in the high-pressure accumulator of the common-rail injection system. For example, the high-pressure pump can be driven via a camshaft of the internal combustion engine by means of a drive shaft. For feeding the fuel to the high-pressure pump, a backing pump such as a gear pump or a rotary slide vacuum pump is used, which is upstream of the high-pressure pump. The foreline transfer pump delivers fuel from the fuel tank through the fuel line to the high pressure pump. [0003] Piston pumps can also be used as high-pressure pumps. The drive shaft is supported in t...

Claims

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Application Information

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IPC IPC(8): F04B1/04
CPCF04B1/0439F04B1/04
Inventor S·安布洛克
Owner ROBERT BOSCH GMBH