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Jet pump for internal-combustion engine and internal-combustion engine having the jet pump

A jet pump and internal combustion engine technology, applied in the field of internal combustion engines and jet pumps, can solve problems such as suction hole damage and corrosion

Inactive Publication Date: 2014-07-30
MAN ENERGY SOLUTIONS SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This cavitation (Kavitation) can lead to damage to the suction hole, especially to corrosion

Method used

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  • Jet pump for internal-combustion engine and internal-combustion engine having the jet pump
  • Jet pump for internal-combustion engine and internal-combustion engine having the jet pump
  • Jet pump for internal-combustion engine and internal-combustion engine having the jet pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0048] figure 1 Shown in axial section is a part of an injection pump for an internal combustion engine (not shown) according to an embodiment of the invention, the injection pump having a suction chamber 1 which is distributed by means of a pre-delivery system (not shown) with fuel under high pressure. The injection pump also has a high-pressure chamber 3 in which fuel is brought under injection pressure via a piston 4 and delivered via a line 10 to a combustion chamber of an internal combustion engine (not shown).

[0049] The suction chamber communicates with the high pressure chamber through a suction hole assembly with two suction holes 2 . Up to this point, the intake opening 2 , which has been congruently configured, has two frustoconical sections 8 , 9 . The opening angle α of the frustum section 8 close to the piston 4 is greater (approximately 25°) than the opening angle β of the frustum section 9 remote from the piston, which is approximately 9° in the exemplary e...

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Abstract

The invention relates to an injection pump for an internal combustion engine and an internal combustion engine with an injection pump. In particular, it relates to an injection pump for an internal combustion engine with a suction chamber (1), a high-pressure chamber (3), and at least one A suction hole assembly connecting the suction hole (2) of the suction chamber and the high-pressure chamber, and a piston (4) for isolating the high-pressure chamber from the suction chamber, the piston (4) having a control for connecting the suction chamber and the high-pressure chamber Edge (5), wherein the suction hole of the suction hole assembly has at least two approximately frustum-shaped sections (8, 9) with different opening angles (α≠β), the injection pump with pre-control A bore (6) is formed in the suction bore (2) of the suction bore assembly in such a way that, during the compression movement of the piston (4), the control edge (5) first causes the pilot bore (6) to Connected to the high pressure chamber.

Description

technical field [0001] The invention relates to an injection pump for an internal combustion engine according to the preamble of claim 1 and to an internal combustion engine with such an injection pump. Background technique [0002] From the document DE 10 2005 025 601 A1 known such an injection pump for internal combustion engines according to the preamble of claim 1, the injection pump has a suction chamber (Saugraum) for supplying fuel to the internal combustion engine, which through The two suction holes (Saugbohrungen) communicate with the high-pressure chamber, and if the cam-controlled piston moves towards the high-pressure chamber during the compression movement, the piston first isolates (absperren) the high-pressure chamber from the suction chamber and continues the compression at The fuel in the high-pressure chamber is injected into the combustion chamber of the internal combustion engine. [0003] In order to achieve different pumping volumes in the constant re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M59/26
CPCF02M59/44F02M59/26F02M59/10
Inventor L·梅尔C·施罗特
Owner MAN ENERGY SOLUTIONS SA
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