Hybrid bus and SCR (selective catalytic reduction) heat management system of engine thereof

• Main Authors: YUAN XINMEI, HAN ERLIANG, LIU XINKUI, PAN FENGWEN, HE HANQING, WEN WUHONG
• Format: Patent
• Language: Chinese; English
• Published: 02.04.2014
• Subjects: BLASTING; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; WEAPONS

The invention discloses an SCR (selective catalytic reduction) heat management system of an engine, which comprises an SCR after-treatment device, an electric louver, temperature sensors and a controller. The SCR after-treatment device is arranged on an exhaust pipe of the engine, the electric louver is sleeved on the outer side of a casing of the SCR after-treatment device and is provided with a plurality of louver blades which are lapped end to end and capable of being opened or closed rotationally, and the temperature sensors are arranged on the front side and the back side of the SCR after-treatment device. Besides, the controller is used for controlling to close the louver when the temperature of an SCR catalyst is lower than the temperature corresponding to the NOx conversion rate of the first preset multiple, and controlling to open the louver when the temperature of the SCR catalyst is higher than the temperature corresponding to the maximum NOx conversion rate of the second preset multiple, wherein t