Motor vehicle tail gas emission device and motor vehicle engine tail gas catalyzer

Abstract

The invention discloses a motor vehicle tail gas emission device and a motor vehicle engine tail gas catalyzer. An air inlet pipe of the motor vehicle engine tail gas catalyzer (2) of the motor vehicle tail gas emission device is connected to the exhaust opening of an engine (1); an air outlet pipe of the motor vehicle engine tail gas catalyzer (2) is connected to an engine exhaust muffler (4); the motor vehicle engine tail gas catalyzer (2) comprises a barrel (25), a three-way catalytic catalyst (29) filled into the barrel, and an air inlet end connecting flange (21); and an air inlet pipe consisting of an inner barrel (24), an outer barrel (22) sleeved outside the inner barrel, and a heat insulating material (23) arranged between the inner barrel (24) and the outer barrel (22) is connected between the front end of the barrel (25) and the air inlet end connecting flange (21). According to the motor vehicle tail gas emission device and the motor vehicle engine tail gas catalyzer, the catalytic conversion efficiency of tail gas exhausted from the engine is higher, and the catalytic conversion starting speed is increased.

Description

technical field [0001] The invention relates to the technical field of motor vehicle and motor vehicle engine exhaust, in particular to a device for processing motor vehicle engine exhaust. Background technique [0002] Motor vehicle engine exhaust catalytic converter is a key component used to reduce motor vehicle exhaust pollution. It converts carbon monoxide, nitrogen oxides, and hydrocarbons in the main harmful gases in motor vehicle exhaust into non-toxic Harmful nitrogen, carbon dioxide and water. Three-way catalytic reaction refers to the use of special chemical reagents to carry out a series of redox reactions with harmful gases in motor vehicle exhaust, so as to achieve the purpose of purifying motor vehicle exhaust. One of the existing three-way catalytic converters is the Chinese patent "three-way catalytic converter" (patent announcement number: CN201412211Y, date of announcement is February 24, 2010) obtained by the applicant's prior application, which include...

AI Technical Summary

Problems solved by technology

When this kind of three-way catalytic converter is working, the air inlet heats up quickly, the catalytic temperature at the catalyst is low, or it takes a long time to reach the ideal catalytic state temperature, so that the catalytic conversion efficiency is low, and it may even cause the engine to start. The catalytic conversion effect cannot meet the standard requirements

Images