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Naturally preheating and exhaust-lowering engine cold starting device

An emission device and engine technology, which is applied to exhaust devices, engine components, machines/engines, etc., can solve the problems of exhaust pollution and low exhaust temperature of three-way catalysts

Inactive Publication Date: 2004-02-11
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the exhaust pollution problem that the three-way catalyst does not work at this stage due to the low exhaust temperature of the engine starting condition and the warm-up condition

Method used

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  • Naturally preheating and exhaust-lowering engine cold starting device
  • Naturally preheating and exhaust-lowering engine cold starting device

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Embodiment Construction

[0010] Below in conjunction with the embodiment shown in the accompanying drawings, further illustrate the specific content and specific working process of the present utility model.

[0011] refer to figure 1 : The auxiliary device for reducing engine emissions by natural preheating includes an exhaust muffler 10 and a buffer housing 5 equipped with a three-way catalyst 6, and an exhaust gas outlet 2 and an exhaust gas return port 1 are opened on the main exhaust pipe, and the exhaust gas outlet 2 is connected with the exhaust gas The guide plate 4 is connected, and the waste gas guide plate 4 is welded on the buffer housing 5 in a zigzag arrangement. The control valve 3 can block the main exhaust pipe and the exhaust gas outlet 2 respectively. The control valve 3 can be manual or It may be automatically controlled according to the number of cycles after the engine is started. The exhaust gas drawn from the exhaust gas outlet 2 first passes through the catalyst to heat the c...

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Abstract

The present invention relates to one engine exhaust purifying unit, and is especially one engine exhaust purifying unit for solving the problem of cold start and warming car. The exhaust purifying unit consists of buffer casing and the waste gas guiding board inside the casing. The Z-shaped waste gas guiding board is set inside the casing horizontally. The buffer has its upper cavity and lower cavity communicated with the main exhaust pipe via the waste gas leading out port and the waste gas returning port separately. At the waste gas leading out port, there is control valve for opening orshutting the waste gas leading out port. The upper cavity of the buffer is provided with circulating waste gas leading out port and circulating waste connecting pipe, in which there is an EGR valve.

Description

technical field [0001] A device for reducing engine cold start emission by natural preheating relates to an engine exhaust purification device. In particular, it relates to an emission purification device for solving cold start and warm-up working conditions. technical background [0002] The use of engine exhaust catalysts is a key measure to solve engine exhaust pollution. The use of electronically controlled injection technology and exhaust catalysts can completely make the emissions of the engine and the whole vehicle meet the European II emission standards. However, with the introduction of the Euro III standard, on the one hand, the requirements for emission indicators are more stringent, and on the other hand, the measurement methods have changed. The measurement method of the Euro II emission standard is to measure the engine after the engine is warmed up, and does not require the emission of the starting and warming conditions, while the Euro III standard starts t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/08
Inventor 邓宝清李理光
Owner JILIN UNIV