Exhausting ducts of naturally aspirated engine

An exhaust channel, naturally aspirated technology, applied in engine components, machines/engines, exhaust devices, etc., can solve problems such as deteriorating the performance of naturally aspirated engines, and achieve the effect of reducing the residual amount of exhaust gas

Inactive Publication Date: 2017-05-31
AVL LIST TECHN CENT SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for a naturally aspirated engine, if the exhaust passage is too short, it will deteriorate the performance of the naturally aspirated engine due to the high residual amount of exhaust gas

Method used

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  • Exhausting ducts of naturally aspirated engine
  • Exhausting ducts of naturally aspirated engine
  • Exhausting ducts of naturally aspirated engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] The present invention will be further elaborated below by describing a preferred specific embodiment in detail in conjunction with the accompanying drawings.

[0033] The above, below, left and right of the present invention are all referred to as figure 1 prevail.

[0034] The invention is applicable to four-cylinder and three-cylinder naturally aspirated engines. Take a naturally aspirated engine with four cylinders as an example, such as figure 1 As shown, an exhaust passage of a naturally aspirated engine includes: the first exhaust passage 12 of the first cylinder C1, the second exhaust passage 22 of the second cylinder C2, and the third exhaust passage of the third cylinder C3 32, the fourth exhaust passage 42 of the fourth cylinder C4, the exhaust passages are independent and not connected to each other.

[0035] Such as figure 1 and image 3 As shown, for a four-cylinder naturally aspirated engine, according to the upper and lower cooling water jackets insi...

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PUM

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Abstract

The invention discloses exhausting ducts of a naturally aspirated engine. The exhausting ducts comprise exhausting duct bodies arranged on a cylinder cover inside the naturally aspirated engine and exhausting outlets formed in the exhausting duct bodies correspondingly. The exhausting duct bodies are mutually independent and connectionless. A bent pipe part and a flow channel part are arranged in any one exhausting duct body, wherein the sectional areas of the bent pipe part are equal everywhere, and the flow channel part is of uniform cross section structure or diverging pipe structure. The exhausting outlets are connected with externally-connected exhausting duct body sections correspondingly. The overall lengths of the exhausting duct bodies in the cylinder cover to a naturally aspirated engine catalytic converter are determined by adjusting the lengths of the externally-connected exhausting duct body sections. The exhausting ducts have the advantages that through the exhausting ducts, the naturally aspirated engine is good in fuel economy, and the waste gas residual amount is reduced.

Description

technical field [0001] The invention relates to the technical field of automobile engines, in particular to an independent exhaust channel for each cylinder integrated in a naturally aspirated engine. Background technique [0002] Cylinder head integrated exhaust manifold is one of the existing mass-produced or pre-research supercharged engine trends. [0003] The main benefit of cylinder head integrated exhaust manifold is improved fuel economy. In the New European Driving Cycle (referred to as NEDC cycle) and the new standard in the future, there are two different aspects of the cylinder head integrated exhaust manifold that will benefit fuel economy. One is that the integrated exhaust manifold accelerates the heat engine so that the loss of friction work is reduced. The second is that the integrated exhaust manifold accelerates the ignition of the catalytic converter, which greatly reduces the extra fuel consumed for the ignition of the catalytic converter. Compared wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F1/42F02F1/40F01N13/10
CPCF01N13/105F02F1/40F02F1/4264
Inventor 李伟吴观
Owner AVL LIST TECHN CENT SHANGHAI
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