Disclosed is a water ingress preventive structure for a tailpipe which discharges exhaust gas outside of a vehicle at a terminal of an exhaust passage system. A curved shape is imparted to the tailpipe. A partition is mounted on an inner periphery of a curved portion outward of a curved direction so as to be gradually spaced apart from the inner periphery toward downstream in a direction of flow of the exhaust gas. Thus, a dead end portion is defined by the partition and the inner periphery of the curved portion outward of the curved direction.

A muffler, in particular an end muffler, is provided for an exhaust system in a vehicle. The muffler has a muffler housing that has an exhaust intake pipe via which exhaust flows into the muffler housing as well as an exhaust discharge pipe via which exhaust flows out of the muffler housing. At least part of the muffler housing or the entire muffler housing is surrounded by an outer housing, and an air gap is provided between the muffler housing and the outer housing.

A diffuser is configured for use on a vehicle having an engine and an exhaust pipe. The diffuser includes a conduit with a first end configured to receive exhaust gases from the engine. A diffusion fitting is coupled to a second end of the conduit to receive exhaust gases discharged from the conduit. The diffusion fitting has an outer wall that includes a curved surface. The curved surface is configured to guide the exhaust gases discharged from the conduit about an axis so that exhaust gases exit a first side of the diffusion fitting rotating about the axis.

Provided is a gas exhaust apparatus for expelling a gas in a treatment space of a wafer treatment apparatus to outside, the gas exhaust apparatus including a main exhaust line connected to the treatment space, and an auxiliary exhaust line having an end connected to the main exhaust line to supply an external air current to the main exhaust line, wherein an automatic closer is disposed at another end of the auxiliary exhaust line to close the other end of the auxiliary exhaust line in a specific situation.

A diesel engine high pressure SCR ventilation and voltage stabilisation system, comprising an SCR reactor (10), an air intake pipeline (20) and an exhaust pipeline (30) respectively connected to an air inlet and an exhaust outlet of the SCR reactor, a pressure difference sensing apparatus (40), and a control apparatus, a first control valve (21) being arranged on the air intake pipeline (20) and a second control valve (31) being arranged on the exhaust pipeline (30), and the control apparatus being connected to the pressure difference sensing apparatus (40), the first control valve (21), and the second control valve (31). The control apparatus controls the first and second control valves such that the pressure difference between the SCR reactor and the exhaust side of the diesel engine remains in a predetermined pressure difference range. The present system implements rapid ventilation and ensures precise control and stabilisation of pressure difference.

Provided is an exhaust fumes reduction device for an internal combustion engine. The device reduces the generation of exhaust fumes and improves output and fuel efficiency by smoothing the discharge flow of exhaust gas in a state additionally mounted at the end of an exhaust line of an internal combustion engine. The exhaust fumes reduction device includes; a housing pipe connected to the end of the exhaust port to discharge exhaust gas; a vortex pipe mounted inside the housing pipe to increase the speed of the exhaust gas introduced into the housing pipe and discharge the exhaust gas spirally; and an external pipe mounted on the outside of the housing pipe and in communication with the housing pipe to allow the outside air to flow in and to assist the smooth discharge of exhaust gas discharged to the housing pipe.

The invention is a circular system with an integrated exhaust-diffuser that reveals an inlay construction of an air passage similar to a tunnel. The present invention through use of aerodynamics, completely releases the exhaust gas and soot layer from the system. It consists of three main parts: the receptacle chamber, the outer frame and the inner frame, which make up the whole construction. The exhaust gas entering the receptacle chamber is split in two and then it heads to the main body (5), where from a viscous form it turns to a sparse-thin form, then the compressed exhaust gas exits to the air tunnel through the slot (6). Above the slot, a short distance away is the stabilizer (3). The stabilizer (3) by compressing the exhaust air mixtures with high pressure is then mixed at the rear of the vehicle with ambient air inside the tunnel. When the vehicle is moving and developing high speed, the air-exhaust mixture is easily merged and the invention that way effectively removes exhaust gases from the system.

A recycling loop configuration of an exhaust gas aftertreatment system decreases a level of system-out NO.sub.x emissions of an engine. An apparatus including the configuration has an exhaust gas recycling system having a closed gas recycling loop system configured to heat gas circulating within the loop, and a blower for circulating gas within the loop. A method for operating the engine includes preheating at least one aftertreatment component of an exhaust gas aftertreatment system of the engine by exposing the component to heated gas circulating in a closed gas recycling loop.

An assembly for braking the displacement of a tailpipe cover is disclosed. The assembly has a clamping element with an elastic material, a tailpipe, and a tailpipe cover. The clamping element is arranged at least indirectly on the tailpipe and on the tailpipe cover. A section of the clamping element extends over the tailpipe in the axial direction parallel to the longitudinal axis of the tailpipe cover. The distance between the longitudinal axis and the clamping element is designed to be at least partly shorter than the distance between the longitudinal axis and the tailpipe in said clamping element section. Alternatively or in addition thereto, at least one section of the clamping element is arranged at least indirectly against the tailpipe in an immovable manner in the direction of the longitudinal axis.

A recycling loop configuration of an exhaust gas aftertreatment system decreases a level of system-out NO.sub.x emissions of an engine. An apparatus including the configuration has an exhaust gas recycling system having a closed gas recycling loop system configured to heat gas circulating within the loop, and a blower for circulating gas within the loop. A method for operating the engine includes preheating at least one aftertreatment component of an exhaust gas aftertreatment system of the engine by exposing the component to heated gas circulating in a closed gas recycling loop.