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Intake manifold for an internal combustion engine provided with metallic reinforcement brackets for fastening the fuel common rail

A technology of intake manifold and internal combustion engine, applied in combustion air/combustion-air treatment, fuel injection device, charging system, etc., can solve the problems of increased manufacturing cost, assembly cost, load loss, etc.

Inactive Publication Date: 2009-05-13
FAB ITAL MAGNETI MARELLI SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, fastening the common rail to the crankcase or engine cover has some disadvantages, with attendant manufacturing costs, Increased assembly expense and load loss

Method used

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  • Intake manifold for an internal combustion engine provided with metallic reinforcement brackets for fastening the fuel common rail
  • Intake manifold for an internal combustion engine provided with metallic reinforcement brackets for fastening the fuel common rail
  • Intake manifold for an internal combustion engine provided with metallic reinforcement brackets for fastening the fuel common rail

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Experimental program
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Embodiment Construction

[0016] In FIG. 1 , reference numeral 1 generally designates an internal combustion engine comprising an engine cover in which several cylinders (not shown) are located and a common rail 2 receiving pressurized fuel and connected to several injectors (not shown), Each injector injects fuel into a corresponding cylinder.

[0017] The internal combustion engine 1 further comprises a common intake manifold 3 which in turn comprises a central body 4 and ducts. In the central body 4 there is provided an intake chamber 5 receiving the intake air, while ducts are adapted to connect the intake chamber 5 to corresponding cylinders of the internal combustion engine 1 .

[0018] The intake manifold 3 comprises a first through hole 6, which is provided in the central body 4 of the intake manifold 3, allowing to fasten the intake manifold 3 itself to the Engine cover. Corresponding metal bushings 8 are embedded in each first assembly hole 13 .

[0019] Such as image 3 As shown, the inta...

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Abstract

An intake manifold for an internal combustion engine comprising an engine head in which there are obtained a number of cylinders; the intake manifold comprises a central body, wherein there are obtained an intake chamber which receives the intake air and a number of conduits each of which connects the chamber to a corresponding cylinder of the internal combustion engine; first passage through holes obtained in the central body for fastening the intake manifold to the engine head by means of first fastening screws screwed into the engine head; a common rail which receives the pressurized fuel and is connected to a number of injectors, each of which injects the fuel into a corresponding cylinder; second blank threaded fastening holes obtained in the central body for fastening the common rail to the central body itself by means of the second fastening screws screwed into the central body and, for each second fastening hole, a metallic reinforcement bracket, which presents a first assembly through hole arranged over and coaxially to a corresponding first fastening hole in order to be locked onto the central body by the corresponding first fastening screw and a second assembly through hole arranged over and coaxially to a corresponding second fastening hole in order to be locked onto the central body of the corresponding second fastening screw.

Description

technical field [0001] The invention relates to an intake manifold of an internal combustion engine, which is provided with a metal reinforcing bracket for fastening a fuel common rail. Background technique [0002] In today's self-igniting internal combustion engines (ie run on the "diesel" cycle and supplied with fuel oil etc.), the low pressure pump feeds fuel from the tank to the high pressure pump which in turn feeds fuel to the common rail. The common rail is adapted to contain pressurized fuel to supply the fuel itself to the injectors (the engine has one injector per cylinder) which are driven cyclically to inject part of the pressurized fuel present in the common rail into the corresponding cylinder . In order for the combustion to work correctly, it is very important to maintain a constant fuel pressure value in the common rail equal to the desired value, which normally varies with engine point and is very high in modern engines (even higher than 2000 bar). In o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M35/104F02M55/02
CPCF02M55/025F02M35/10216F02M35/10242F02M35/104
Inventor 斯特凡诺·福尔纳拉斯特凡诺·卡尔塔
Owner FAB ITAL MAGNETI MARELLI SPA
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