Pump assembly for supplying fuel, preferably diesel fuel, to an internal combustion engine

A technology for pump components and internal combustion engines, applied to parts of pumping devices for elastic fluids, fuel injection pumps, liquid fuel engines, etc., capable of solving problems such as weakened thread couplings and corrosion

Active Publication Date: 2022-03-22
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] Since this threaded coupling is formed between two steel parts, the presence of water can lead to the formation of rust not only on the outside of the coupling but also on the inside, weakening said threaded coupling

Method used

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  • Pump assembly for supplying fuel, preferably diesel fuel, to an internal combustion engine
  • Pump assembly for supplying fuel, preferably diesel fuel, to an internal combustion engine
  • Pump assembly for supplying fuel, preferably diesel fuel, to an internal combustion engine

Examples

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Embodiment Construction

[0049] refer to image 3 , 1 denotes in its entirety a pump assembly for supplying fuel, preferably diesel fuel, to an internal combustion engine (not shown).

[0050]The pump assembly 1 generally comprises a high pressure pump with a pumping piston (partially shown) designed to be able to supply fuel to an internal combustion engine (not shown) and a not shown pre-feed pump, eg of the gear type , the pre-supply pump is designed to be able to supply fuel to the high-pressure pump. The high pressure and gear pumps are driven by shafts (not shown in the drawings).

[0051] The pump 1 includes a pump body (not shown) and a pump head 2 assembled with the pump body. A cylinder 3 is formed in the pump head 2 and extends along the axis A1. A pumping piston (not shown) extends along axis A1 and is slidably coupled to cylinder 3 . A suction duct 16 is formed laterally in the pump head 2 for feeding a suction chamber 6 which partially accommodates an inlet valve (not shown) for cont...

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Abstract

A pump assembly for supplying fuel to an internal combustion engine; said pump assembly (1) comprising: - a pump head (2) in which a cylinder (3) for accommodating a sliding pumping piston is formed; - a through hole (4) extending from the cylinder (3) to the outside of the pump head (2); - a plug (5) coupled to the pump head (2) for defining the through hole (4) A suction chamber (6) communicating with the cylinder (3); wherein, the coupling between the blocking member (5) and the pump head (2) is the outer surface (8) of the surrounding wall (7) of the pump head (2) and A threaded coupling between the inner surface (10) of the surrounding wall (9) of the blocking member (5); wherein the surrounding wall (9) of the blocking member (5) comprises an inclined surface provided with a connection to the inner surface (10) The lower edge (12) of (13); wherein the projection (H) of the inclined surface (13) along a plane orthogonal to the inner surface (10) is less than twice the height (h) of the thread of the blocking member (5) .

Description

technical field [0001] The invention relates to a pump assembly for supplying fuel, preferably diesel fuel, to an internal combustion engine. Background technique [0002] In particular, the invention relates to a pumping assembly of the type comprising a high-pressure pump, in this example a piston pump, for supplying fuel to an internal combustion engine, and a low-pressure or low-pressure pump for supplying fuel from a reservoir to the piston pump. Pre-supply pump. [0003] In more detail, the invention relates to the area of ​​the threaded coupling that couples the pump head to the associated cover for closing the feed chamber, said area being exposed to the air and the surrounding environment. [0004] As is known, piston pumps comprise a pump body on which at least one pump head is mounted. The pump head has formed therein a cylinder within which the pumping piston is slidably engaged. An actuating device, eg a camshaft, is arranged to move the piston with an intake...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M59/48F04B53/22F16B37/14F16B37/00
CPCF02M59/48F04B53/22F16B37/00F16B37/145F02M59/02F02M59/06F04B1/0448F02M59/485F04B53/16F02M2200/8076F02M2200/855F02M2200/05
Inventor L·莫斯卡雷拉B·洛亚科诺V·C·贝尔焦维内
Owner ROBERT BOSCH GMBH
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