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High supercharged engine intake port and designing method

A supercharged engine and design method technology, applied in the direction of engine components, machines/engines, mechanical equipment, etc., can solve the problem that the intake port is difficult to play a good role

Active Publication Date: 2014-09-17
CHINA FAW LIMITED WUXI FUEL INJECTIONEQUIP RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Traditional engine intake ports are designed based on low intake pressure. With the improvement and wide application of supercharging technology, it is difficult for the intake ports designed based on traditional methods to operate under high boost or even super high boost. function well in the engine

Method used

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  • High supercharged engine intake port and designing method
  • High supercharged engine intake port and designing method

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Embodiment Construction

[0034] A practical design example of the present invention is illustrated below by taking the design of the air inlet of a certain type of high-pressure diesel engine as an example.

[0035] Such as figure 2 , 3 Is the schematic diagram of the intake port of the high boost engine. The air intake includes a constriction section 2 and a divergence section 4 , the transition from the constriction section 2 to the divergence section 4 is the inlet throat 3 .

[0036] image 3 Shown is a schematic diagram of the size of a high boost engine intake port and design method of the present invention.

[0037] 1) Determine the gas temperature T at the inlet inlet according to the characteristic data of the supercharger 1 is 358.15K, pressure P 1 3.5bar, gas flow rate C 1 It is 80m / s. Inlet outlet design back pressure p 2 Selected as 2.9bar.

[0038] According to the cylinder arrangement, the inlet port outlet diameter d 2 =33.2mm 2 , so the inlet cross-sectional area A 2 789....

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Abstract

The invention relates to a high supercharged engine intake port and a designing method, and belongs to the technical field of intake systems of internal combustion engines. The high supercharged engine intake port is characterized by comprising an intake port tapered section, an intake port throat and an intake port diverging section. The ration of the section area A0 of the intake port throat to the area A2 of an intake port outlet ranges from 0.75-0.85; the ratio of the distance L1 between the intake port throat and the intake port outlet to the total length L of the intake port ranges from 0.4-0.6. The designing method has the innovated advantages that the problem that the circulating capacity of an intake port designed by an existing low-intake-pressure engine intake port designing method is insufficient is solved; the engine intake port which meets the requirements of high supercharged working conditions is designed, so that the circulating capacity of the high supercharged engine intake port is improved, the pressure in a cylinder after intake is increased, and air input is increased; accordingly, the high supercharged engine intake port and the designing method have a positive effect on optimizing combustion and improving the performance of a high supercharged engine.

Description

technical field [0001] The invention relates to a high boost engine intake duct and a design method thereof, belonging to the technical field of engine intake systems. Background technique [0002] Supercharging technology, as an effective means of energy saving and emission reduction, has been widely used in various engines due to its good portability. With the development of high-efficiency turbochargers and the continuous improvement of engine intake pressure ratio, the degree of intake boost is getting higher and higher. It is foreseeable that there will be more and more high-pressure or even super-high-pressure engines in the near future. [0003] The continuous improvement of engine intake pressure makes it difficult for the engine intake designed for the current low-pressure intake to perform its function well, thus restricting the improvement of engine performance. Therefore, the design of the engine intake port should also be improved with the increase of pressure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M35/104
Inventor 夏兴兰周得广陈大陆王胜利缪雪龙居钰生
Owner CHINA FAW LIMITED WUXI FUEL INJECTIONEQUIP RES INST
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