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Device for reducing emission during cold start of automobile engine and control method

A car engine and cold start technology, applied in the direction of exhaust devices, engine components, machines/engines, etc., can solve complex, expensive, space intrusive problems, etc., to avoid energy waste, reduce light-off time, and improve overall thermal efficiency Effect

Active Publication Date: 2017-08-11
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there is a common problem with afterprocessors: the effectiveness of the afterprocessor is almost non-existent for the first few minutes of engine operation at ambient temperature
They are all complex, space intrusive, and expensive
These devices are not designed to aid in faster catalyst light-off and are an additional expense to the vehicle cost

Method used

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  • Device for reducing emission during cold start of automobile engine and control method
  • Device for reducing emission during cold start of automobile engine and control method
  • Device for reducing emission during cold start of automobile engine and control method

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. The following examples are only used to illustrate the present invention but not to limit the present invention.

[0026] As shown in the accompanying drawing, a kind of device of the present invention reduces emissions when the automobile engine is cold started, comprising:

[0027] intake bypass pipe 9, the inlet of the intake bypass pipe 9 communicates with the intake pipe of the engine between the intercooler 17 and the compressor 12, and the outlet end of the intake bypass pipe 9 extends Into the lumen of an expanded exhaust pipe, an intake check valve 11 and an intake bypass valve 10 are installed on the intake bypass pipe 9;

[0028] Exhaust bypass pipe, the inlet of the exhaust bypass pipe 13 communicates with the exhaust pipe of the engine before the turbine 16, and the outlet end of the exhaust bypass pipe 13 extends into the lumen of ...

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Abstract

The invention discloses a device for reducing emission during cold start of an automobile engine. During cold start of the engine, an intake bypass, an exhaust bypass and a heating device are used together to effectively shorten the rise time of a three-way catalytic converter, and high-temperature compressed air is pumped in to solve the problems of rich mixture during start of the engine and low conversion efficiency caused by oxygen deficiency during CO and HC catalytic oxidation. When the temperature of the three-way catalytic converter is higher than 850 DEG C, heat in the three-way catalytic converter is carried away by a cooling liquid via a cooling pipeline, so that sharp temperature rise of a catalyst due to sudden braking, abnormal combustion, continuous operation under high-load working condition and the like are prevented, and the conversion efficiency cannot be impacted by heat inactivation of the three-way catalytic converter. A Rankine cycle system is also provided to recover waste gas in an exhaust pipe and energy of the high-temperature cooling liquid flowing out of the three-way catalytic converter, so that air conditioners and other accessories are driven to act for use.

Description

technical field [0001] The invention relates to the technical field of automobile aftertreatment, in particular to a device and a control method for reducing emissions during cold start of an automobile engine. Background technique [0002] Since the beginning of the 20th century, the increase in the number of automobiles in the world has greatly exceeded the growth rate of the population. With the increase of residents’ income, the decline of automobile prices and the improvement of the consumption environment, the scale of my country’s automobile market will continue to expand. The total amount of pollutant emissions from motor vehicles in my country continues to rise. After people gradually understand the hazards of automobile emissions, they continue to explore new methods to improve the performance of automobile emissions. More and more stringent emission regulations have further promoted the innovation of related technologies. [0003] The main content of in-machine pu...

Claims

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Application Information

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IPC IPC(8): F01N3/20
CPCF01N3/2006F01N3/2046F01N3/2053Y02A50/20
Inventor 刘海峰马俊生马桂香尧命发
Owner TIANJIN UNIV
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