The utility model relates to a double channel multifunctional engine exhaust pipe, which comprises an exhaust pipe, a heating sleeve, an outer sleeve pipe, a channel change-over valve plate, a heat insulation plate, a temperature control switch and a valve controller. The middle part of the exhaust pipe with double channel side cold car exhaust passage, the other side is a hot exhaust channel in the cold car exhaust passage is equipped with a heating tube, heating casing is provided with coolant entrance and outlet. Equipped with temperature air switch and valve controller. In the hot exhaust passage is provided with a heat insulating plate. In the cold and hot end exhaust channel with channel switching valve plate, the valve plate connected with the channel switching valve controller to connect the silencer in back-end two channel overlap, is connected to the front end of engine exhaust pipes, which have emission reduction, reduce mechanical wear and double channel safe driving and fuel saving function of engine exhaust pipe. The exhaust pipe uses the waste heat discharged by the exhaust pipe to rapidly heat the engine coolant, and the cold starting engine is rapidly raised to the normal running temperature, and the utility model has the advantages of saving fuel oil.
【技术实现步骤摘要】
【技术保护点】
１．双通道多功能发动机排气管，包括排气管（１）、加热套管（８）、外套管（６）、通道转换阀板（１６）、隔热板（３）、温度控制开关（１２）、阀门控制器（１０），其特征在于所述的排气管（１）的中间部位设成双通道，一侧为冷车排气通道（７），另一侧为热车排气通道（２），在冷车排气通道（７）的一侧安装有加热套管（８），加热套管（８）的前端和后端分别设有冷却液出口（９）和冷却液入口（１１），加热套管（８）装有外套管（６），外套管（６）与加热套管（８）之间为冷却液层（５），冷却液层（５）通过冷却液入口（１１）和冷却液出口（９）与发动机小循环的冷却液连通，冷却液入口（１１）处的加热套管（８）...
【技术特征摘要】
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