Electric heating type catalytic converter and heating control method thereof

Abstract

The invention discloses an electric heating type catalytic converter which comprises a shell. The electric heating type catalytic converter is characterized in that a metal carrier is arranged in the shell and provided with a positive electrode and a negative electrode which are connected with a power source; a temperature sensor is arranged on the outer surface of the metal carrier, and an insulation structure for wrapping the side of the metal carrier and the temperature sensor is arranged on the outer portion of the metal carrier; an electric leakage inductor is arranged on the outer wall of the shell; and the power source, the temperature sensor and the electric leakage inductor are all connected with an ECU. The electric heating type catalytic converter achieves the function of promoting a catalyst to be fast ignited through electric heating during cold start of a vehicle, the ignition time of the catalyst is greatly shortened, and whole vehicle discharge is greatly reduced.

Description

technical field [0001] The invention relates to an exhaust gas purification device, in particular to an electrically heated catalytic converter and a heating control method thereof. Background technique [0002] As a widely used exhaust gas purification device at present, the three-way catalytic converter mainly uses catalysts to convert harmful gas components such as CO, HC, and NOx in the exhaust into harmless gases for discharge. [0003] After the cold start of the vehicle, the catalyst carrier is in the heating stage, and the purification efficiency of the catalyst is very low in the ignition stage. At this time, the concentration of harmful gases in the exhaust gas is high, and more than 80% of the pollutants emitted by the internal combustion engine are produced by the cold start stage. [0004] At present, the main ways to speed up the ignition of the catalytic converter in technology are: double-layer end cone wrapping or full wrapping of the front stage of the cata...

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Problems solved by technology

[0003] After the cold start of the vehicle, the catalyst carrier is in the heating up stage, and the purification efficiency of the catalyst is very low in the light-off stage. At this time, the concentration of harmful gases in the exhaust gas is high, and more than 80% of the pollutants emitted by the internal combustion engine are produced by the cold start stage.

[0004] At present, the main ways to accelerate the light-off of the catalytic converter in technology are: double-layer end cone wrapping or full wrapping of the front stage of the catalytic converter to reduce heat loss; Good metal carrier, etc., but the effect is still very limited; after the vehicle is cold started, the concentration of harmful gases in the exhaust gas is high

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