Abstract: A vehicle exhaust system has a first exhaust pipe adapted to be connected to a first exhaust port of an engine, a first expansion chamber connected to the first exhaust pipe, a second exhaust pipe adapted to be connected to a second exhaust port of an engine, a second expansion chamber connected to the second exhaust pipe, a collector connected to the first and second expansion chambers, a third exhaust pipe connected to the collector, and a first muffler connected to the third exhaust pipe. A vehicle having the vehicle exhaust system is also disclosed.

Abstract: A motorcycle with a muffler disposed downwardly of a rider's seat positioned, in a side view, upwardly of a rear wheel when a rear shock absorber is extended, to minimize sideway bulging of the muffler from a vehicle body and improve ride comfort, while avoiding interference between the muffler and other parts. An outer shell of a muffler has a rhombus cross section. The muffler is disposed on at least one side in a vehicle width direction of a rear wheel wherein one pair of side walls extend in parallel with each other out of side walls of the outer shell extending in a vertical direction. A side cover is formed to extend along the upper and outer side walls of the four side walls of the outer shell to cover the muffler from a side, downwardly of a rider's seat.

Abstract: A vehicle includes a frame, an engine, and an exhaust system. The frame includes a main frame and a sub-frame movably attached to the main frame. The sub-frame includes an exhaust bracket that includes a hollow collar. The engine includes an engine casing and an exhaust port. The engine is releasably attached to the sub-frame. The exhaust system includes a conduit, a conduit bracket, and a muffler. The conduit includes an upstream end and a downstream end. The upstream end is connected to the exhaust port. The conduit bracket includes a first end and a second end. The first end is attached to the conduit at a location intermediate the upstream end of the conduit and the downstream end of the conduit. The second end of the conduit bracket is movably attached to the hollow collar. The muffler is attached to the downstream end of the conduit.

Abstract: A coulomb damper is attached to a component of an exhaust system. The inner surface of the coulomb damper is in intimate contact with the outer surface of the component of the exhaust system. The intimate contact is defined by a pair of weld lines extending along an axial length of the coulomb damper in one embodiment. In another embodiment, the intimate contact is defined by at least a three point contact between the coulomb damper and the component of the exhaust system. In another embodiment a coulomb damper includes an outer member press fit over an inner member. A chamber is defined between the inner and outer member. In one embodiment, the inner member and the outer member are coaxial and the chamber is an annular chamber having a constant radial width. In another embodiment, the chamber is eccentric in relation to the inner member and has a variable radial width.

Abstract: A coulomb damper is attached to a component of an exhaust system. The inner surface of the coulomb damper is in intimate contact with the outer surface of the component of the exhaust system. The intimate contact is defined by a pair of weld lines extending along an axial length of the coulomb damper in one embodiment. In another embodiment, the intimate contact is defined by at least a three point contact between the coulomb damper and the component of the exhaust system.

Abstract: A motorcycle including a vehicle body frame with a single down frame extending downwardly and rearwardly from a head pipe supporting a front fork in a steerable manner. An engine main body arranged behind the down frame, said engine main body being mounted on the vehicle body frame. A pair of left and right radiators arranged separately on left and right sides of the down frame respectively, said pair of left and right radiators being supported on the vehicle body frame in front of the engine main body. Exhaust pipes connected to front portions of an engine main body with a down frame and a pair of left and right radiators being arranged side by side in a left-right direction wherein the exhaust pipes are located between at least one of the pair of left and right radiators and the down frame in a vehicle front view.

Abstract: An exhaust port formed on one side portion of an engine body along the vehicle width direction, the exhaust port connected to an exhaust muffler arranged in an extending manner in the vehicle width direction along a rear edge of the vehicle body frame by way of an exhaust pipe passage means that introduces an exhaust gas from the exhaust port. The exhaust pipe passage means is arranged in an extending manner in the longitudinal direction of the vehicle while having a bent portion bent toward the center in the vehicle width direction from one side of the engine body in the vehicle width direction behind the engine body, as viewed in a plan view.

Abstract: An exhaust processing unit includes a selective catalytic reduction apparatus which processes exhaust from an engine. A reducing agent injection apparatus is attached to the exhaust processing unit. The reducing agent injection apparatus injects a reducing agent which is supplied to the selective catalytic reduction apparatus. The reducing agent tank and the reducing agent supply pump are arranged outside the engine compartment. The reducing agent tank retains the reducing agent. The reducing agent supply pump supplies the reducing agent from the reducing agent tank to the reducing agent injection apparatus. The reducing agent pipe connects the reducing agent supply pump and the reducing agent injection apparatus. The revolving frame includes a pipe frame. The reducing agent pipe is arranged from the reducing agent supply pump to the reducing agent injection apparatus so as to pass through the inner space of the pipe frame.

Abstract: A muffler assembly for a vehicle includes a muffler and one of a mount structure and a mount bracket, which is attached to the muffler. Vehicles that include muffler assemblies are also described herein.

Abstract: A wheel loader includes a vehicle frame, an engine, an operating fluid tank, a stand, a rear support frame, and a base member. The engine is mounted on the vehicle frame. The operating fluid tank is disposed in front of the engine. The stand is fixed to the vehicle frame and supports the operating fluid tank. The rear support frame is disposed facing the stand with the engine interposed there-between and fixed to the vehicle frame. The base member is disposed above the engine and has one end fixed to an upper part of the stand and the other end fixed to an upper part of the rear support frame. A diesel particular filter, a nitrogen oxide reduction catalytic converter, and a connecting pipe are all mounted on the base member with the connecting pipe connecting the diesel particulate filtering device and the nitrogen oxide reduction catalytic converter.

Abstract: A frame is disclosed for a vehicle having a vehicle body, a vehicle suspension, and a power-plant configured to generate torque and an exhaust gas stream. The frame includes a tubular frame rail in fluid communication with the power-plant, wherein the rail is defined by a fully-closed cross-section that provides a fluid passage. The frame rail is configured to support the vehicle body and the vehicle suspension. The fluid passage is configured to channel the exhaust gas stream through the frame rail and away from the vehicle body. A vehicle employing such a frame is also disclosed.

Abstract: A control system for a hybrid vehicle is presented. The control system can include an air/fuel ratio control module that selectively commands a rich air/fuel ratio upon starting an engine based on a temperature of an electrically heated catalyst (EHC) in an exhaust system of the engine, wherein the EHC includes a hydrocarbon (HC) adsorber. The control system can include an air pump control module that selectively activates an air pump supplying air into the exhaust system upstream from the EHC based on whether the engine is on and at least one of whether the HC adsorber is full and whether the EHC is saturated with oxygen. The control system can also include an electric heater control module that selectively activates an electric heater of the EHC based on whether the engine is on and the temperature of the EHC, as well as whether the HC adsorber is full.

Abstract: A support system for an exhaust aftertreatment system for a two-stroke locomotive diesel engine providing a secure mounting of certain components of the exhaust aftertreatment system to the locomotive structure while at the same time allowing for differential thermal expansion (and the resulting physical displacement) of the components. The support system further carries the physical mass of the components of the aftertreatment system while at the same time effectively isolating the aftertreatment system from external loads and forces caused by motions of the locomotive engine and the locomotive frame.

Abstract: A dump truck includes a cab being located behind an engine compartment in which an engine is enclosed, a body being located behind the cab, and an exhaust aftertreatment device being adapted to purify an exhaust gas from the engine. The exhaust aftertreatment device includes a DPF device being adapted to capture a particulate matter in the exhaust gas and being located on a top of a fender provided alongside the cab, an SCR device being adapted to purify a nitrogen oxide in the exhaust gas and being located between the cab and the body, and a communication pipe through which the DPF device and the SCR device are in communication with each other.

Abstract: There is provided a travel vehicle-mounted engine device in which a particulate filter can be arranged in a highly rigid state in an engine as one of constituent parts of the engine to eliminate the need for taking countermeasures against exhaust gas for each unit of a vehicle or the like to thereby enhance the general purpose use of the engine. The travel vehicle mounted engine device mounted on a travel machine body and covered with a hood is provided with an air cleaner for supplying air to an engine and with a gas cleaning filter for cleaning exhaust gas from the engine. The air cleaner is arranged above an intake manifold on one side of an upper surface of the engine, and the gas cleaning filter is arranged above an exhaust manifold on the other side of the upper surface of the engine.

Abstract: A crop sprayer comprises a cab having i) a left lateral wall structure including a first door, and ii) a right lateral wall structure including a second door. A first platform having a first foot support is positioned adjacent to the first door. A second platform having a second foot support is positioned adjacent to the second door. The second platform defines a routing space located beneath the second foot support. An exhaust assembly includes i) a muffler having a muffler inlet and a muffler outlet, ii) an inlet conduit in fluid communication with the muffler inlet, and iii) an outlet conduit in fluid communication with the muffler outlet. The second platform defines a forward platform portion and a trailing platform portion. The muffler is located within the routing space with the inlet conduit extending into the routing space at the leading platform portion and the outlet conduit extending from the routing space at the trailing platform portion.

Abstract: A construction machine includes: an engine room provided with an intake opening and a discharge opening; a fan for sucking cooling air into the engine room through the intake opening; a duct provided in the engine room so as to communicate with the discharge opening and discharging the cooling air sucked into the engine room to an outside of the engine room through the discharge opening; and an exhaust gas pipe guiding exhaust gas discharged from the engine into the duct. A portion on a distal end side of the exhaust gas pipe is inserted into the duct, and the inserted portion of the exhaust gas pipe inserted into the duct is formed with an exhaust hole which causes the exhaust gas to be discharged in a direction different from a flowing direction of discharge wind in the duct through the exhaust hole.

Abstract: An exhaust system for an agricultural and/or industrial tractor (10) having an internal combustion engine (11) located in an engine compartment covered by an engine hood (11a). The system includes an exhaust gas treatment unit (16) located inside the engine compartment hood and having a main chamber (18) fed by an inlet pipe (15) which receives exhaust gases from the engine and an outlet pipe (17) which passes treated gases into a final portion (14a,14b) of the exhaust system. The inlet and outlet pipes (15,17) are non-aligned and extending alongside the main chamber (18) in opposite directions to reduce the overall length of the treatment unit. The treatment unit (16) may be installed above the engine (11) with the exhaust gases passing through the unit either generally normal or parallel to the direction of driving (D) of the tractor.

Abstract: A construction machine includes: a lower propelling body; and an upper slewing body which is slewably mounted on the lower propelling body. The upper slewing body includes: an engine room provided with an intake opening and a discharge opening; a duct provided in the engine room so as to communicate with the discharge opening and an exhaust gas pipe which guides exhaust gas discharged from the engine into the duct. The discharge opening and an outlet of the duct are open downward from the engine room. A portion on a distal end side of the exhaust gas pipe is inserted into the duct. The duct and the exhaust gas pipe are configured to cause the exhaust gas to be mixed with cooled air in the duct and cause the mixture of the exhaust gas and the cooled air to be discharged downward from the discharge opening.

Abstract: A system and control module for controlling an electrically heated catalyst includes a remote start module generating a remote start signal, a catalyst control module controlling the electrically heated catalyst based on the remote start signal and an engine control module starting the engine after preheating and/or when required by the vehicle to honor a request as defined in this document.

Abstract: A honeycomb body for an exhaust-gas purification system may be used, for example, as a carrier body for catalytically acting coatings or as a filter, absorber or mixer in the exhaust system of an internal combustion engine. The honeycomb body has channels, an axial main direction, a planar front surface, a planar end surface and a circumferential surface disposed parallel to the axial main direction. The front surface and/or the end surface are disposed obliquely with respect to the axial main direction. Such a honeycomb body is advantageous, in particular, for applying reducing agent to the oblique end or front surface. A method for producing a honeycomb body, an exhaust line section and a motor vehicle are also provided.

Abstract: A method and system for raising the operating temperature of an emissions control device of an automotive vehicle. A generator converts the vehicle's mechanical braking energy to electrical energy. The electrical energy is delivered, without electrical storage, to an electric heater that heats either the emissions control device or the exhaust gas at the input to the device.

Abstract: A bulldozer includes an engine, first and second exhaust treatment apparatuses, and an engine hood. The first and second apparatuses are arranged above the engine. The hood covers upper parts of the first and second apparatuses. Longitudinal directions of the first and second apparatuses extend along the vehicle front and back direction. The hood has an upper surface, left and right side surfaces, and first and second inclined surfaces. The first and second inclined surfaces contact the rear side of the upper surface and rear sides of the left and right side surfaces, respectively. The first and second inclined surfaces are inclined more obliquely to the right and left rear than the left and right side surfaces, respectively, and face downward to the rear. Front edges of the first and second inclined surfaces are positioned in front of rear edges of the first and second apparatuses.

Abstract: A work machine includes: a frame; an engine; an exhaust gas control device; a compartment cover; a compartment cover supporting member; an engine hood; an exhaust gas control device supporting member that suspends the exhaust gas control device downward through the opening and supports the exhaust gas control device in a suspended state; and an opening cover, wherein: the exhaust gas control device supporting member includes a mounting portion that is attached to the exhaust gas control device and a fastening portion that is supported by, and fastened to, the reinforcing member, and when the fastening portion is unfastened, the exhaust gas control device supporting member is removable above the opening together with the exhaust gas control device attached to the mounting portion.

Abstract: A horizontal muffler for an agricultural vehicle is provided. One agricultural vehicle includes an exhaust system having a muffler configured to direct exhaust out of an engine and to reduce a noise of the exhaust. The agricultural vehicle also includes a steering wheel configured to control steering of the agricultural vehicle. The muffler is disposed forward of the steering wheel relative to a direction of travel of the agricultural vehicle. Moreover, the muffler extends in a substantially horizontal direction such that a flow of the exhaust through the muffler is substantially parallel to a ground surface.

Abstract: A construction vehicle adapted to travel using a wheel and equipped with an exhaust aftertreatment device to which a reductant is supplied is provided. At least a portion of the exhaust aftertreatment device including a front end thereof is located on a fender provided for the wheel. A supply pump adapted to supply the reductant and a reductant tank adapted to store the reductant are located ahead of the fender and below the exhaust aftertreatment device. The reductant tank is located below the supply pump.

Abstract: A wheel loader includes a vehicle frame, an engine, a supporting mechanism, a diesel articulate filtering device, and a connecting pipe. The engine is mounted on the vehicle frame, and the supporting mechanism is fixed to the vehicle frame. The diesel particulate filtering device is mounted on the supporting mechanism above the engine and has an exhaust gas inlet facing the rear. An exhaust upstream side end part of the connecting pipe is coupled to an exhaust part of the engine, and an exhaust downstream side end part of the connecting pipe is connected to an exhaust gas inlet of the diesel particulate filtering device from the rear. The connecting pipe includes an extending part that is disposed below the diesel particulate filtering device and extends rearward of the diesel particulate filtering device from the exhaust upstream side end part, and a flexible pipe part provided in the extending part.

Abstract: A vehicle exhaust system has a first exhaust pipe adapted to be connected to a first exhaust port of an engine, a first expansion chamber connected to the first exhaust pipe, a second exhaust pipe adapted to be connected to a second exhaust port of an engine, a second expansion chamber connected to the second exhaust pipe, a collector connected to the first and second expansion chambers, a third exhaust pipe connected to the collector, and a first muffler connected to the third exhaust pipe. A vehicle having the vehicle exhaust system is also disclosed.

Abstract: A muffler of a motorcycle having an outside diameter greater than the outside diameter d1 of a rectilinear portion of a branch pipe is disposed at a transverse portion of an exhaust pipe. Since the muffler is formed to be roughly elliptic in sectional shape, the outside diameter of the muffler is represented by a major diameter da as the length in the direction of a major axis and a major diameter db as the length in the direction of a minor axis. When the muffler is disposed between a swing arm and a seat to be along the transverse portion of the exhaust pipe, the muffler can be disposed on the more vehicle front side while securing the capacity thereof. Therefore, protrusion of the muffler toward the rear of the vehicle is suppressed, and the external appearance of a vehicle rear portion is enhanced.

Abstract: A filtering apparatus having a plurality of passages made up of juxtaposed longitudinally extending channels. The passages are axially divided by a porous filtering media extending across the channels whereby the channels fluidly communicate through the porous filtering media. A pressure differential is created across the filtering media by restricting flow through an end of each channel, with each restriction being at an opposite end from that of the other channel. As flow restriction rather than outright blocking is used, some flow is possible along each passage directly along the channels even if the channels lose the ability to fluidly communicate through clogging of the filtering media.

Abstract: A two-wheeled motor vehicle (10) provided with a throttle grip (25) rotated by the driver to change the degree of opening of a throttle valve (31), and also with an exhaust valve (34) which, when a throttle ratio which is a ratio of the angle of operation of the throttle grip to the maximum rotation angle of the throttle grip is between zero and a predetermined value, reduces noise emitted from an engine.

Abstract: A hydraulic excavator includes an engine, a revolving frame supporting the engine, a vehicle body frame, a diesel particulate filter device, and a first connecting pipe. The vehicle body frame is disposed on the revolving frame. The diesel particulate filter device and the selective catalytic reduction device are supported by the vehicle body frame. The first connecting pipe connects the engine and the diesel particulate filter device. The first connecting pipe includes a bellows part that is extendable in at least a portion thereof. The diesel particulate filter device is located further away from the engine than the selective catalytic reduction device. The first connecting pipe passes below the selective catalytic reduction device and is connected to the diesel particulate filter device. A connecting portion for the diesel particulate filter device and the first connecting pipe is located below the diesel particulate filter device.

Abstract: An improvement in a work vehicle having an exhaust gas treatment unit is disclosed. An engine is disposed in an engine room formed in a vehicle body and supported by the vehicle body. A support unit includes right and left vertical struts mounted on the vehicle body across the engine along a vehicle body transverse direction. The exhaust gas treatment unit is disposed inside the engine room and attached to the support unit upwardly of the engine, under a posture elongate along the vehicle body transverse direction.

Abstract: A cooling unit that is cooled by heat exchange with air is disposed at a rear side in a vehicle longitudinal direction of a power unit. Further, a cooling fan is disposed at a rear in the vehicle longitudinal direction of the cooling unit. Further, catalytic converters are disposed at a rear side in the vehicle longitudinal direction of the power unit. A periphery of these catalytic converters is surrounded by a heat insulator. A duct portion, that communicates an interior of the heat insulator and a space between the cooling unit and the cooling fan, is provided at this heat insulator.

Abstract: A saddle-ride type vehicle that allows easy axle adjustment even if the exhaust system has such a structure wherein a muffler is close to an axle of a rear wheel. The exhaust system includes a tubular muffler connected to an exhaust pipe for discharging the exhaust of an engine. In the exhaust system, the muffler is disposed laterally to a rear wheel rotatably supported by swingarms via an axle. An end cap covering a muffler rear end portion of the muffler is detachably and attachably provided on the muffler rear end portion with the end cap being disposed on a vehicle outer side of the axle at such a position that the axle is invisible in a side view of the vehicle.

Abstract: A working vehicle includes an engine, a vehicle body frame on which the engine is mounted, an exhaust gas treatment device for treating exhaust gas of the engine, and a fixing base for fixing the exhaust gas treatment device, and the fixing base is separated from the engine by a gap. Furthermore, a support body for connecting the fixing base to the vehicle body frame is also separated from the engine by a gap. A bellows pipe for absorbing solid-borne sound is provided in an area where a suction pipe of the exhaust gas treatment device is connected to an exhaust manifold of the engine.

Abstract: A work vehicle limited in a mounting space is adapted to have an engine, which is provided with an exhaust gas cleaning device, easily arranged therein. An engine device, which is to be mounted on the work vehicle, is provided with the engine mounted on a machine body and covered with a hood, an air cleaner for cleaning air introduced into the engine, and an exhaust gas cleaning device for cleaning exhaust gas from the engine. The exhaust gas cleaning device is arranged on a flywheel housing fitted on one side portion of the engine.

Abstract: A urea water tank (23) is arranged in a cab (10) at which an operator boards, thereby making it possible to arrange urea water under a preferred temperature environment for preventing freeze and crystallization of the urea water. A water supply port (24A) is provided to be opened to a left surface portion (19C) of a cab box (19) constituting the cab (10) for supplying the urea water to the urea water tank (23) from an outside of the cab (10). Therefore, even in a case of resupplying the urea water to the urea water tank (23), an operator can easily resupply the urea water through a water supply hose (24) to the urea water tank (23) from the outside of the cab (10) without entering into the cab (10).

Abstract: A muffler assembly for a vehicle includes a housing at least partially defining an internal cavity and having an inlet and an outlet. The muffler assembly includes an outlet pipe that has an inlet end open to the internal cavity and an outlet end open at the outlet of the housing. A siphon tube is in the internal cavity and has an inlet opening adjacent an inner surface of the housing and an outlet opening in fluid communication with the outlet pipe between the inlet end and the outlet end of the outlet pipe. The siphon tube is configured to remove condensate from the internal cavity when a predetermined pressure differential is established between the inlet opening and the outlet opening.

Abstract: Engine exhaust is sent to a reformer, which produces hydrogen from fuel remaining in the exhaust. The hydrogen may be stored in a hydrogen tank, and may be used by a fuel cell to produce electricity to recharge a vehicle battery and/or to supply propulsion current to an electric propulsion system.

Abstract: An exhaust processing assembly for an exhaust generating device, the exhaust processing assembly comprising one or more cartridges, each of the cartridges including a housing and a constituent housed in the housing and capable of at least partially removing carbon dioxide from the exhaust of the exhaust generating device, said constituent being one or more of a solid absorber and any other constituent, wherein the cartridges are one of: removable from the exhaust processing assembly and replaceable with other like cartridges, and refillable with new constituent.

Abstract: An elastomeric isolator has an elastomeric body which incorporates an inner structural member and an outer structural member. The elastomeric body includes a shear hub extending between radial flanges defined by the inner and outer structural members that undergo shearing stresses during deflection of the elastomeric isolator. The inner and outer structural members are designed to provide a travel stop for the elastomeric isolator in order to avoid compression of the shear hub during high loads. The elastomeric bushing can also include an optional integral elastomeric heat shield which protects the shear hub.

Abstract: A board-like division member is provided that extends in a vehicle body transverse direction so as to divide a portion of the engine room into an upper region and a lower region along in an engine room height direction. An engine is mounted downwardly of the division member. An exhaust treatment apparatus is mounted upwardly of the division member for treating exhaust gas from the engine. An air discharge portion is formed in a lateral face region of the hood which corresponds to a position of the division member in the engine room height direction. Air present inside the engine room is discharged to the outside through this air discharge portion.

Abstract: An exhaust device for a work vehicle including: an exhaust pipe for guiding exhaust to a vehicle exterior. The exhaust pipe includes: an exhaust guide pipe into which exhaust from an engine is introduced, a bending section for changing an exhaust direction; an external protective pipe that externally fits onto a downstream-side guide pipe; an ejector section for suctioning and introducing external air between an outer periphery of the exhaust guide pipe and an inner periphery of the external protective pipe; and an external air introduction section provided to an upstream-side end section of the external protective pipe.

Abstract: A regeneration apparatus for executing a regeneration process to an exhaust gas purifying apparatus and an engine control device that controls a rotational speed of an engine according to an instruction value by a rotational speed instruction apparatus are provided. When a directional control valve is in a neutral position, the engine control device controls the rotational speed of the engine to an automatic idle rotational speed (Nai) by an automatic idle selection unit regardless of the instruction value. However, when it is determined that the regeneration process of the exhaust gas purifying apparatus is executed in a state of controlling the rotational speed of the engine at the automatic idle rotational speed (Nai), the engine control device increases the rotational speed of the engine to a regeneration processing rotational speed (N1) higher than the automatic idle rotational speed (Nai).

Abstract: A motorcycle is provided that includes a connecting pipe, a throttle body, an intake pipe, and an air cleaner, which are intake system parts disposed forward of a cylinder of an engine and are connected to the front side of the cylinder. The motorcycle further includes an exhaust pipe and a muffler, which are exhaust system parts connected to the rear side of the cylinder. The cylinder is inclined rearward, and the exhaust pipe of an exhaust system part extends forward along one side of the motorcycle in a widthwise direction of the engine 50 and detours the front of the engine and then extends rearward along the other side of the motorcycle in a widthwise direction of the engine.

Abstract: On an upper revolving structure, an engine having an exhaust port is mounted. In the midway portion of the exhaust pipe connecting the exhaust port of the engine and an exhaust gas post-treatment device, a first bellows pipe and a second bellows pipe are arranged through a connecting pipe having an L-shaped bending portion. In this case, the first bellows pipe and the second bellows pipe are arranged so as to have a positional relationship in which axis lines thereof (X1-X1, Z1-Z1) cross each other. That is, the first bellows pipe is arranged in a horizontal direction so that its axis line (X1-X1) extends in the left-right direction of the upper revolving structure. The second bellows pipe is arranged so that its axis line (Z1-Z1) matches the vertical direction of the upper revolving structure.

Abstract: Pickup truck exhaust back pressure reduction system is composed of a base plate that is an exhaust inlet which is mounted to the pickup truck bed floor just behind the cab, a rotating barrel tower which is stationary and vertically mounted on top of the base plate as a trap for the exhaust stream, a rotating barrel and bearings assembly which rotate in the inside top of the rotating barrel tower, a flywheel being attached to the upper bearing shaft and the motor being attached to the trim plate which surrounds the rotating barrel tower adjacent the flywheel and within engaging distance of the flywheel. The rotating barrel is actuated by a variable D/C voltage current which is powered by the pickup trucks engine and rotates slow at low engine r.p.m.'s and higher at high engine r.p.m.'s which then at high r.p.m.'s the turbine which is located in the lower hollow end of the rotating barrel starts to create vacuum which pulls the exhaust stream and creates back pressure reduction.

Abstract: Provided are an apparatus and method for preventing the inflow of exhaust gas of a vehicle. The apparatus includes a mode door provided in an air conditioner of a vehicle in such a manner as to close an air inlet, being in air-close mode, so that only inside air is circulated, or to open the air inlet, being in air-open mode, so that outer air is introduced, and a controller designed, in the air-close mode and above a certain vehicle speed, to control the mode door to tilt and open at a certain angle towards the air-open mode.

Abstract: An exhaust system for a motorcycle includes: an exhaust pipe connected to a cylinder head of an engine; a pair of right and left silencers connected to the exhaust pipe and disposed in right and left sides of a rear wheel respectively, wherein the exhaust pipe is branched into two in a rear of the cylinder head and in a front of a rear wheel suspension system and connected to the pair of right and left silencers respectively.