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Communicated composite inlet channel system for four-valve diesel engine

A diesel engine and intake port technology, which is applied in the field of four-valve diesel engine intake ports, can solve the problems affecting the mixing effect of mixed intake air and diesel oil and gas, shorten the mixing time and process of tangential air flow and spiral air flow, and achieve good oil and gas Mixing effect, little change in casting process, full combustion effect

Inactive Publication Date: 2011-03-09
DONGFENG CHAOYANG DIESEL ENGINE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The lag time difference during mixing and the only primary airflow mixing shorten the mixing time and process of tangential airflow and helical airflow to a certain extent, which in turn affects the oil-air mixing effect of mixed intake air and diesel oil

Method used

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  • Communicated composite inlet channel system for four-valve diesel engine
  • Communicated composite inlet channel system for four-valve diesel engine
  • Communicated composite inlet channel system for four-valve diesel engine

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Embodiment Construction

[0009] The structural principles of the present invention will be further described below in conjunction with the accompanying drawings and through embodiments. The four-valve diesel engine connected compound intake port system mainly includes a tangential intake port 1, a spiral intake port 2 and a cylinder 3. A connecting air inlet 4 is provided on the partition wall between the tangential air inlet 1 and the helical air inlet 2, so that the air flow in the two air inlets of the tangential air inlet 1 and the helical air inlet 2 is communicated. The entrance cross-sectional areas of the tangential air inlet 1 and the helical air inlet 2 are equal. The design of the connected air intake structure is also applicable to the intake port of the two-valve diesel engine.

[0010] The entrance cross-sectional area of ​​the tangential air inlet 1 and the spiral air inlet 2 of the present embodiment is equal to 1496mm 2 , the communication port 4 is simultaneously cast on the partit...

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Abstract

The invention discloses a communicated composite inlet channel system for a four-valve diesel engine. A communicated gas inlet is arranged on the wall between a tangential inlet channel and a helical inlet channel and is used for communicating gases in the two inlet channels. Before two gases enter a cylinder, the gases are mixed, the tangential gas and the helical gas are interlaced and mixed mutually, and the gases are further mixed after the gases enter the cylinder; and because the gases are successively mixed twice, more partial turbulent flows are formed, thereby effectively improving the generating conditions of an oil and gas mixture and achieving good oil and gas mixing effect. Because the combustion is further sufficient, the economical efficiency and the dynamic property of the diesel engine are effectively improved, the generation of NOx and particulate matters is reduced, and the exhaust emission index is greatly improved. Compared with a separated inlet channel, the communicated composite inlet channel has very small casting process change and is suitable for batch production. The invention is also suitable for the inlet channel of a two-valve diesel engine.

Description

technical field [0001] The invention belongs to the technology of internal combustion engines, and in particular relates to a technical design of an intake port of a four-valve diesel engine. Background technique [0002] The intake port is an important structure on the engine, and the design of a good intake port is a key technology for the overhead diesel engine. In recent years, with the continuous improvement of diesel engine technology, four-valve diesel engines have been popularized and gained a good market effect. Each cylinder of a four-valve diesel engine has two intake ports, the general type is a tangential intake port and a spiral intake port, which are independent of each other. In the cylinder, the two airflows collide and interweave to form turbulent flow, and at the same time mix with diesel to ensure the normal combustion and work of the diesel engine and clean exhaust emission. Therefore, the intake port is also one of the key technologies for diesel engi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M35/104
Inventor 李金武贺兆欣曹晓峰陶海峰
Owner DONGFENG CHAOYANG DIESEL ENGINE
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