An automobile cold start emission adsorption device and control method
An adsorption device and cold start technology, which is applied to the electric control of exhaust treatment devices, exhaust devices, noise reduction devices, etc., can solve the problems of battery power consumption and achieve the effects of reducing cold start emissions and shortening the ignition temperature time
Active Publication Date: 2017-02-22
BEIJING UNIV OF TECH
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Problems solved by technology
Close-mounted catalytic converters cannot convert HC in the first 60s after cold start; catalytic converter fuel heating requires a combustion chamber, which will generate additional emissions; catalytic converter electric heating technology is simpler in structure than fuel heating catalytic converters, but it needs to be used Catalyst temperature reaching the light-off temperature in a short period of time consumes a lot of battery power
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[0019] Below in conjunction with accompanying drawing and specific embodiment the present invention will be further described:
[0020] The device mainly includes an electronic control unit 1, an exhaust pipe 2, an engine 3, and an air intake pipe 4, wherein the air intake pipe 4, the exhaust pipe 2 and the engine 3 are connected, and an air filter 5 is arranged on the air intake pipe 4 along the air intake direction. , the first three-way catalytic converter 9, the first valve 11, and the second three-way catalytic converter 14 are sequentially arranged on the exhaust pipe 2 along the exhaust direction, and it is characterized in that it also includes a bypass pipe 13 and a second valve 10. The third valve 12, activated carbon adsorber 7, temperature control device 8, the bypass pipe is connected in parallel to the engine exhaust pipe 2, and the connection between the bypass pipe 13 and the exhaust pipe 2 is respectively located on both sides of the first valve 11 , on the by...
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The invention discloses an automobile cold start emission absorbing device and a control method thereof, and belongs to the field of internal combustion engines. The automobile cold start emission absorbing device is connected to an automobile engine exhaust pipe in a parallel mode, activated carbon is used as an absorbing material, and an electronic control unit determines the working condition of an absorber by acquiring temperature signals of three-way catalysts and a temperature control device based on a corresponding control strategy and by turning on and off a plurality of electromagnetic valves. The activated carbon is used for absorbing emissions generated in the cold start process of an engine, and the temperature of exhaust gas entering the absorber can be adjusted through the temperature control device. After the three-way catalysts work normally, a bypass of the device is removed. Engine rig tests show that the engine cold start HC emission can be lowered by over 80% by the adoption of the device, the CO emission is lowered by over 40%, and the NOx emission is lowered by over 40%. The catalysts enable initiation temperate time to be shortened by 60 seconds. A common vehicle can meet the European Union 4 emission standard through a simple low-cost improvement. The automobile cold start emission absorbing device is simple in structure, small in size, convenient to mount and low in cost.
Description
technical field [0001] The invention provides an automobile cold start emission adsorption device and a control method, in particular to an operation mode and a control method of an adsorber, and belongs to the field of internal combustion engines. Background technique [0002] With the rapid increase in the number of automobiles, automobile emissions have aggravated the pollution of the atmosphere and the deterioration of the environment. Automobile emissions have become the main source of urban air pollution. Reducing engine pollutant gas emissions has become one of the important issues to be solved for the continued development of internal combustion engines. The latest national standards, the country will implement the fifth phase of national motor vehicle emission standards on January 1, 2018, and Beijing will implement the fifth phase of national motor vehicle emission standards ahead of schedule on January 1, 2016. The National V standard is equivalent to the Euro V s...
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IPC IPC(8): F01N3/18F01N9/00
CPCY02A50/20Y02T10/40
Inventor 纪常伟徐溥言汪硕峰冯雨余梦辉林深
Owner BEIJING UNIV OF TECH