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exhaust manifold for engine

An exhaust manifold, engine technology, applied in the direction of engine components, machines/engines, exhaust devices, etc., can solve problems such as joint leakage, detachment from cylinder head, manifold bending, etc.

Inactive Publication Date: 2017-03-01
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, if Figure 12B As shown in , when the exhaust manifold 811 is heated and then cooled, the exhaust manifold tends to bend due to plastic deformation
This can cause the manifold 811 to rupture, or cause the manifold to bend and come off the cylinder head
This disengagement could cause leaks at the joints, or cause some of the fasteners securing the exhaust manifold 811 to the cylinder head to snap off causing further leaks

Method used

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  • exhaust manifold for engine
  • exhaust manifold for engine
  • exhaust manifold for engine

Examples

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Embodiment Construction

[0042] special reference figure 1 , which shows a motor vehicle 5 with an engine 10 . The engine 10 has an exhaust manifold 11 affixed thereto for delivering exhaust gases from the engine 10 to an exhaust system 20 .

[0043] Exhaust system 20 comprises an exhaust pipe 17 connected at one end to a common exhaust outlet 16 on exhaust manifold 11, one or more noise and / or emission control devices 18 (not shown in detail) and through which exhaust gases flow into the air tail pipe 19 .

[0044] The exhaust manifold 11 comprises a cast body defining four exhaust gas transfer pipes 13a, 13b, 13c and 13d, a common exhaust gas outlet 16 and a collection means such as a chamber 14, where the chamber will come from all the exhaust gas transfer pipes 13a, 13b, 13c Combining or merging with the exhaust gas of 13d so that the exhaust gas flows out through the common exhaust outlet 16. In the example shown all exhaust from the engine 10 exits through a single exhaust manifold 11, but i...

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Abstract

The invention discloses a cast exhaust manifold (11) for an engine (10), the exhaust manifold being fixed on a On the engine (10) where substantially rigid spacers (15a), (15b) and (15c) are located between each pair of flanges to create an interference fit when the exhaust manifold (11) is at ambient temperature. The use of separate flanges (12a), (12b), (12c), (12d) allows the exhaust manifold (11) to expand when heated without high levels of internal stress, and when the exhaust manifold (11) cools , Spacers (15a), (15b) and (15c) hinder excessive deformation of the exhaust manifold (11).

Description

technical field [0001] The present invention relates to internal combustion engines and, in particular, to exhaust manifolds for internal combustion engines. Background technique [0002] Cast exhaust manifolds for internal combustion engines operate in extreme environments at temperatures close to the operating limits of their materials of construction (approximately 1000°C). Such materials include austenitic and ferritic cast irons and austenitic and ferritic cast stainless steels. Over the life of an engine, the exhaust manifold will heat up and cool down hundreds of times, causing this component to deform. During the hot phase, the exhaust manifold can expand 3mm in length. However, the exhaust manifold shrinks as it cools down so that it is 3mm shorter than its original length after multiple thermal cycles. [0003] Such as Figure 11 As shown in , it is known to provide an exhaust manifold 711 having a single flange 712 to connect the manifold 711 to a cylinder head...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N13/10
CPCF01N13/1861Y10T29/49398F01N13/1811F01N13/10
Inventor 安东尼·伯纳德·德莫茨罗伯特·安德鲁·韦德史蒂文·约翰逊迈克尔·约翰·凯德
Owner FORD GLOBAL TECH LLC