Abstract: A work vehicle includes a cooling fan, an engine, and a diesel particulate filter (DPF) purifying exhaust gas of the engine, placed under a hood in that order, beginning at the front. Exhaust gas from the engine is exhausted through an exhaust passage after passing through the DPF. The cooling fan supplies cooling air to the rear. The DPF is placed such that a length direction thereof follows a width direction of a vehicle body. The exhaust passage includes a first passage, a second passage, and a third passage. The first passage extends forward and upward from the DPF before extending along the length direction thereof on a front side of the DPF. The second passage extends downward from a downstream portion of the first passage. The third passage extends to the rear from a downstream portion of the second passage and also includes an exhaust outlet.

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: 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 motorcycle including a multi-cylinder engine; a main frame; and a swing arm for supporting a rear wheel in a rear portion of the main frame. A rear suspension has one end rotatably supported by a portion located in a position above a swing axial support portion of the swing arm. A link mechanism connects the rear suspension and the swing arm, and includes a suspension arm rotatably supported by an upper portion of the swing arm and a link member having one end rotatably supported by the main frame. An exhaust collecting pipe is arranged below the multi-cylinder engine; and an exhaust device is arranged in a space below the swing arm. An exhaust connecting pipe connects an outlet of a rear end of the exhaust collecting pipe with a front surface of the exhaust chamber in a moving direction of the motorcycle.

Abstract: Aspects provide for an engine and an aftertreatment system coupled to the engine and configured to treat an exhaust stream from the engine. The engine may be incorporated into a mobile piece of equipment (e.g., a truck). A fairing may be shaped to improve air flow during motion by reducing air resistance created by the aftertreatment system.

Abstract: Systems and methods are disclosed for improving the aerodynamic efficiency (e.g., reduce drag) on vehicles, such as class 8 tractors. In some disclosed examples, the systems and methods utilize exhausted gases from an internal combustion engine of the vehicle to direct a stream of gas forwardly of the vehicle. In other disclosed examples, the systems and methods utilize generated air flow from, for example, electric fans, engine driven or pneumatically/hydraulically driven pumps, etc., to direct a stream of gas forwardly of the vehicle for reducing the aerodynamic drag on vehicles. In yet other disclosed examples, the systems and methods utilize a unique configuration of the vehicle's radiator fan(s) in order to direct a stream of gas forwardly of the vehicle.

Abstract: An internal combustion engine includes a cylinder block defining a cylinder and a cylinder head mounted to the block. The cylinder head supplies air and fuel to the cylinder for combustion therein. The engine also includes an exhaust manifold operatively connected to the cylinder head and having a first outlet and a second outlet configured to exhaust post-combustion gasses from the cylinder. The engine also includes a turbocharging system configured to pressurize an airflow for delivery thereof to the cylinder. The turbocharging system includes a low-flow turbocharger driven by the post-combustion gasses from the first outlet to pressurize the airflow and a high-flow turbocharger driven by the post-combustion gasses from the second outlet to pressurize the airflow. The turbocharging system additionally includes a flow control device for selectively directing the post-combustion gasses to the low-flow and high-flow turbochargers. A vehicle employing such an engine is also disclosed.

Abstract: A shaped plastic exhaust system for a fuel cell vehicle. In one embodiment, the exhaust system employs integrally molded bundle clips that support vehicle brake lines and/or a fuel supply line. An exhaust flow section can be formed into any suitable shape for a particular vehicle design, including a flat rectangular shape giving the exhaust system a low profile. The integral bundle clips can be provided every so often along the exhaust flow section, or can extend the complete length of the exhaust flow section.

Abstract: A wheel loader comprises an engine, an exhaust gas post-processing device, an engine room, a top plate, a cooling room, a partition wall, and a drainage mechanism. The exhaust gas post-processing device is disposed above the engine in the engine room and includes a diesel particulate filtering device and a selective catalyst reduction catalyst device. The top plate has a sloping part with a height that decreases toward the rear, and a first ventilation part that includes a plurality of through-holes formed in the sloping part. The top plate defines an upper plane of the engine room. The cooling room accommodates a cooling unit and is disposed to the rear of the engine room, separated by the partition wall. The drainage mechanism is disposed below the first ventilation part, and configured to drain water entering the engine room from the first ventilation part to the outside of the engine room.

Abstract: An exhaust pipe extends rearward of a vehicle body from an engine located forward of the rear wheels and is supported on the vehicle body frame. An exhaust muffler is coupled to a rear end of the exhaust pipe that is arranged between a pair of right and left rear wheels. A catalytic converter (catalytic device) is installed in the middle of the exhaust pipe and the exhaust pipe is deviated to one side in a horizontal direction of the vehicle body with respect to the engine and the exhaust muffler in order to position the catalytic convertor between the vehicle body frame and the rear wheels.

Abstract: A work vehicle includes: a top having a first hole; a plate having a second hole and attached to the top with the second hole in alignment with the first hole; an exhaust pipe having an internal path and a flange projecting outward and abutting against and thus attached to the plate; and a tail pipe having a portion positioned in the first and second holes, and an end in the internal path of the exhaust pipe. The plate is disposed between the top and the flange and serves as a reference in attaching the flange to the top. Thus, a work vehicle that can facilitate disposing an exhaust pipe and a tail pipe concentrically and provide better workability in disposing the exhaust pipe and the tail pipe concentrically, and a method for manufacturing the work vehicle, can be provided.

Abstract: Base end portions of a pair of engine support legs are welded to an upper frame in an exhaust duct. The pair of engine support legs extends to a notched portion of the exhaust duct from the base end portions to front end portions thereof. The front end portions project to the outside of the exhaust duct. The pair of engine support legs is connected to each other by a reinforcement plate arranged to close the notched portion of the exhaust duct.

Abstract: A hydraulic excavator includes an engine, an engine room accommodating the engine, a fan configured to generate cooling wind in the engine room, an exhaust treatment apparatus and an engine hood. The exhaust treatment apparatus treats exhaust from the engine. The exhaust treatment apparatus is at least partially positioned above the engine. The engine hood is arranged above the engine room. An upper surface of the engine hood has a first planar section arranged above the engine, a second planar section including ventilation holes, and an inclined section arranged between the first planar section and the second planar section. The second planar section is arranged above the exhaust treatment apparatus at a position higher than the first planar section. The inclined section extends to be inclined from the first planar section to the second planar section.

Abstract: A construction machine including: a frame; an engine on a frame; a hydraulic pump; a guard panel disposed on the frame to surround an engine room and including a maintenance port for the hydraulic pump; an exhaust-gas-purification device inside the engine room; and a support member to support an exhaust-gas-aftertreatment device including the exhaust-gas-purification device just above the hydraulic pump. The support member includes a first portion to support the exhaust-gas-purification device and a second portion to support a NOx-reducing catalyst at a position closer to the maintenance port than the exhaust-gas-purification device. The catalyst supporting portion supports the NOx-reducing catalyst at a position higher than the exhaust-gas-purification device so as to form, over the hydraulic pump, a maintenance space having an upper end higher than an upper end of a space formed under the first portion and the exhaust-gas-purification device.

Abstract: In controlling a hybrid vehicle, an internal combustion engine and an electric motor are controlled such that, when a power request is received while traveling with an operation of the internal combustion engine stopped and a requested power required for traveling is higher than a predetermined power, the operation of the internal combustion engine is started with an intake air volume based on the requested power and the hybrid vehicle travels with the requested power. When the power request is received for the first time after ignition-on, the start control for controlling the internal combustion engine is performed such that the operation of the internal combustion engine is started with an intake air volume lower than that based on the requested power. The hybrid vehicle includes a controller that performs the above control, an internal combustion engine, an electric motor, a battery, and a purification device.

Abstract: A straddle-riding vehicle includes a vehicle body frame including an engine supporting portion that supports an engine and a front wheel supporting portion arranged in front of the engine supporting portion, wherein a wheel supporting arm that supports the front wheel and a suspension arm that supports the wheel supporting arm are mounted to the front wheel supporting portion. At least a portion of a secondary air introduction unit that introduces secondary air into an exhaust passage of the engine is positioned directly behind the front wheel supporting portion.

Abstract: An exhaust module made of a thermoplastic material which is connected to a fascia or bumper of a vehicle. In one embodiment, the hybrid fascia mounted exhaust tip assembly includes a bracket. The bracket has a large diameter portion which surrounds, but is not in contact with, an exhaust pipe. The exhaust pipe is free to move around as a result of the vehicle traveling over bumps in the road and around turns. The bracket also has a small diameter portion which is connected to the large diameter portion. A ring tip has a portion that slides onto a bezel portion of the small diameter portion.

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: A modular exhaust system is disclosed for treating the exhaust from a fossil fuel powered prime mover; the exhaust system includes bricks, inserts placed inside of the bricks and funnels to direct exhaust through various flow paths in order to treat the exhaust.

Abstract: A curved-pipe portion curved so as to change the exhaust direction is provided to the downstream-side end section of the exhaust guide pipe and the external protective pipe, and the spacing between an end-section outer periphery of the exhaust guide pipe and an end-section inner periphery of the external protective pipe in the curved-pipe portion is configured so as to be greater on the side opposite the center of curvature of the curved-pipe portion than the side nearer thereto.

Abstract: A heat shield assembly includes shroud or housing fabricated from a heat shielding material having at least one pair of spring arms extending from side walls of the shroud for engaging a member to which the heat shield assembly is to be attached, and one or more retention tabs projecting into a longitudinal channel in position to limit longitudinal movement of the assembly relative to the member when the member is attached to the spring arms.

Abstract: A fitting portion structure of a device for post-processing exhaust gas in an agricultural operation vehicle is provided. The device is arranged in parallel to the lengthwise direction of an engine at the upper portion of an exhaust manifold of the engine, an exhaust gas inlet is coupled to the exhaust manifold or to a turbo charger and a flange pipe which are located at the lower portion of the exhaust gas inlet, and a fixing means is arranged between the engine and the device to support the load of the device. The fixing means includes a frontal bracket arranged between a cylinder head on the front side of the engine and a DPF canning of the device, and a rear bracket arranged between a cylinder head on the rear side of the engine and a flange coupling portion of the flange pipe.

Abstract: A saddle-ride vehicle for reducing air resistance flowing toward the rear of the vehicle. A saddle-ride type vehicle includes a front cowl in a vehicle front part and a rear cowl provided in a vehicle rear part. The rear cowl is provided with a bulging part protruding to the left and right in a vehicle widthwise direction. In addition, the bulging part protrudes outward of the rear edges of the front cowl in the vehicle widthwise direction. Further, side surfaces of the bulging part are each formed in a curved shape which bulges toward an outside of the vehicle in a plan view of the vehicle. Furthermore, a peak part which is located at an outermost edge of the side surface in the vehicle widthwise direction is located at a position closer to the front of the vehicle within a length of the bulging part in a vehicle front-rear direction.

Abstract: A work vehicle includes a vehicle frame, a radiator, an engine, a first post-treatment apparatus, a second post-treatment apparatus, and a bracket. The engine is provided in front of the radiator. The first post-treatment apparatus and the second post-treatment apparatus are positioned in front of the radiator and treat exhaust from the engine. The bracket is positioned in front of the radiator and is elastically supported by the vehicle frame. The bracket supports the engine, the first post-treatment apparatus, and the second post-treatment apparatus. Both the highest position of the first post-treatment apparatus and the highest position of the second post-treatment apparatus are no higher than the highest position of the radiator.

Abstract: A vehicle includes a chassis and an internal combustion (IC) engine carried by the chassis. The IC engine includes an exhaust system with a protected component and an exhaust pipe fluidly connected with the protected component. The exhaust pipe includes an inside diameter with a lower surface and a water dam connected with a predefined portion of the lower surface, whereby water is inhibited from flowing through the exhaust pipe and into the protected component.

Abstract: In an engine, an exhaust gas purifying device and a regeneration device, there are provided detectors for detecting working states thereof, such as a rotational sensor, a cooling water temperature sensor, an intake temperature sensor, exhaust gas temperature sensors, pressure sensors, and opening degree sensors. When a trouble occurs in any of the sensors other than the pressure sensors among them, a light degree of operation restrictions is performed for restricting a rotational speed of the engine while it can be determined that particulate matter is not excessively accumulated in a particulate matter removing filter from a detection value of the pressure sensors. On the other hand, when the particulate matter is excessively accumulated in the particulate matter removing filter or when any of the pressure sensors has a trouble, a heavy degree of the operation restrictions accompanied by a fuel injection quantity restriction of the engine is performed.

Abstract: An exhaust purifying system includes: a catalytic device supplied with electric power from a power supply unit; a first connecting unit connecting one end of the catalytic device to a negative electrode node of the power supply unit; a second connecting unit connecting the other end of the catalytic device to a positive electrode node of the power supply unit; a leak detecting unit detecting leak from the power supply unit; and a control unit controlling opening and closing of each of the first and second connecting units. When leak is not detected by the leak detecting unit in a leak check state where one of the first and second connecting units is closed and the other is opened, the control unit closes the other and applies current through the catalytic device, and when leak is detected in the leak check state, the control unit does not apply the current through the catalytic device.

Abstract: In one exemplary embodiment of the invention a method for controlling a speed of an internal combustion engine includes shutting off fuel flow into a cylinder to reduce the speed of the internal combustion engine. The method also includes providing an electrical load to an alternator of the internal combustion engine, further reducing the speed of the internal combustion engine.

Abstract: A regeneration device that performs regeneration treatment of a particulate matter removing filter estimates a trapping amount of particulate matter trapped in the filter by two systems. Specifically, there are provided an estimating unit that estimates a first estimated trapping amount based upon a rotational speed of an engine and a fuel injection quantity and an estimating unit that estimates a second estimated trapping amount based upon a differential pressure across the particulate matter removing filter. The regeneration device determines whether or not the regeneration treatment is executed based upon whether or not at least one of the two estimated trapping amount is equal to or more than a preset trapping amount threshold value. Further, the regeneration device determines that there is a malfunction in the regeneration device in a case where the second estimated trapping amount is larger than the first estimated trapping amount.

Abstract: A hydraulic excavator includes an engine, a selective catalytic reduction apparatus, an outer cover, a first column member, a reducing agent tank, and a reducing agent pump. The selective catalytic reduction apparatus processes exhaust from the engine. The first column member supports the outer cover. The reducing agent tank retains a reducing agent. The reducing agent pump supplies the reducing agent from the reducing agent tank to the selective catalytic reduction apparatus. The reducing agent pump is attached to the first column member.

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: Base end portions of a pair of engine support legs are welded to an upper frame in an exhaust duct. The pair of engine support legs extends to a notched portion of the exhaust duct from the base end portions to front end portions thereof. The front end portions project to the outside of the exhaust duct. The pair of engine support legs is connected to each other by a reinforcement plate arranged to close the notched portion of the exhaust duct.

Abstract: An exhaust module made of a thermoplastic material which is connected to a fascia or bumper of a vehicle. In one embodiment, the hybrid fascia mounted exhaust tip assembly includes a bracket. The bracket has a large diameter portion which surrounds, but is not in contact with, an exhaust pipe. The exhaust pipe is free to move around as a result of the vehicle traveling over bumps in the road and around turns. The bracket also has a small diameter portion which is connected to the large diameter portion. A ring tip has a portion that slides onto a bezel portion of the small diameter portion.

Abstract: A partition wall is arranged between an engine and a radiator in an engine room. A first exhaust processing unit has a first exhaust processing apparatus and a first mount section. The first exhaust processing apparatus is arranged between the engine and the partition wall. A second exhaust processing unit has a second exhaust processing apparatus and a second mount section. The second exhaust processing apparatus is arranged above the first exhaust processing apparatus. The second exhaust processing apparatus is arranged so as to overlap with at least a portion of the first exhaust processing apparatus in a planar view. The partition wall has a first wall member and a second wall member arranged above the first wall member. The distance between the boundary between the first and second wall members and the second exhaust processing unit is larger than the outer diameter of the first exhaust processing apparatus.

Abstract: A hydraulic excavator includes an engine, an engine room accommodating the engine, a fan configured to generate cooling wind in the engine room, an exhaust treatment apparatus and an engine hood. The exhaust treatment apparatus treats exhaust from the engine. The exhaust treatment apparatus is at least partially positioned above the engine. The engine hood is arranged above the engine room. An upper surface of the engine hood has a first planar section arranged above the engine, a second planar section including ventilation holes, and an inclined section arranged between the first planar section and the second planar section. The second planar section is arranged above the exhaust treatment apparatus at a position higher than the first planar section. The inclined section extends to be inclined from the first planar section to the second planar section.

Abstract: A motorcycle includes an exhaust chamber (82), having defined therein a chamber expansion compartment (90) for exhaust gases, and a muffler (84) having defined therein muffler expansion compartments (92, 94, 96) for the exhaust gases on a downstream side of the exhaust chamber (82). Respective outer peripheral walls of the exhaust chamber (82) and the muffler (84) are formed by a common casing (69). The exhaust chamber (82) is positioned intermediate between a motorcycle combustion engine (E) and a motorcycle rear wheel (22). The exhaust chamber (82) has an inner side surface positioned laterally inwardly of an outer side surface (22a) of the rear wheel (22) in a motorcycle body widthwise direction, and the muffler (84) has a rear portion positioned laterally outwardly of the rear wheel (22).

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 work vehicle includes an engine, an exhaust gas post-processing device, an engine room and a partitioning member. The exhaust gas post-processing device includes a diesel particulate filtering device, a selective catalyst reduction device, a connecting pipe connecting the diesel particulate filtering and the selective catalyst reduction device, and an injection device configured to inject a reducing agent into the connecting pipe. The engine room accommodates the engine and the exhaust gas post-processing device. The partitioning member includes a first partition part disposed between the injection device and the diesel particulate filtering device, and a second partition part disposed between the injection device and the selective catalyst reduction device.

Abstract: In the engine compartment of a bulldozer the radiator is arranged forward of the engine. An exhaust gas treatment unit is arranged above the engine. A first exhaust gas treatment device of the exhaust gas treatment unit is arranged such that the longitudinal direction of the first exhaust gas treatment device follows the forward-backward direction of the vehicle. A second exhaust gas treatment device of the exhaust gas treatment unit is positioned to the side of the first exhaust gas treatment device, and arranged such that the longitudinal direction of the first exhaust gas treatment device follows the forward-backward direction of the vehicle. The air cleaner is arranged between the radiator and the exhaust gas treatment unit in the forward-backward direction of the vehicle.

Abstract: A bulldozer includes an engine, first and second exhaust treatment apparatuses arranged above the engine, a relay connection pipe connecting the first and second apparatuses, and an engine hood covering upper parts of the first and second apparatuses. The relay connection pipe has a cylindrical shaped main section, a first section connecting the main section and the first apparatus, and a second section connecting the main section and the second apparatus. The lower end of the main section is positioned above upper ends of the first and second apparatuses. The upper surface of the hood has a convex section protruding above the relay connection pipe and a base section formed integrally with the convex section below the convex section. At least a portion of a line segment extending along the upper edge of the main section overlaps an upper surface part of the convex section in a bulldozer top view.

Abstract: Exhaust systems and passenger service vehicles, for example, buses are used together. The exhaust system can be arranged, in use, to be above an engine compartment. The exhaust system includes a first filter and a second filter, each filter having an inlet and an outlet. The inlets are inline with the respective first and second filters, and the outlets are transversely arranged with reference to the respective filters. Vehicles may have an overall length of about 35 feet or less and have an unladen weight of around 25,000 lbs or less.

Abstract: A partition wall is arranged between an engine and a radiator in an engine room. A first exhaust processing unit has a first exhaust processing apparatus and a first mount section. The first exhaust processing apparatus is arranged between the engine and the partition wall. A second exhaust processing unit has a second exhaust processing apparatus and a second mount section. The second exhaust processing apparatus is arranged above the first exhaust processing apparatus. The second exhaust processing apparatus is arranged so as to overlap with at least a portion of the first exhaust processing apparatus in a planar view. The partition wall has a first wall member and a second wall member arranged above the first wall member. The distance between the boundary between the first and second wall members and the second exhaust processing unit is larger than the outer diameter of the first exhaust processing apparatus.

Abstract: A tractor has a chassis (10) which supports an engine (4) towards the front thereof. A deflecting shield (8) is positioned to the rear of the engine to deflect sideways hot air which has passed over the engine, and a tank (15) for the storage of urea based fluid for injection into an exhaust system of the engine is located behind the engine to the rear of the deflecting shield. The chassis to the rear of the engine may have an open-topped section (11a) between the engine (4) and a transmission housing (12), the tank being at least partially housed within the open-topped section of the chassis to shield the tank from the hot air which has passed over the engine and from the heating effects of the sun.

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 working vehicle includes a traveling machine assembly, a drive unit, a bonnet configured to cover the drive unit, and a cover provided below the bonnet and configured to be removably attached to the traveling machine assembly, including a main body portion extending in a longitudinal direction of the traveling machine assembly, a first male engagement portion provided at a front end portion of the main body portion, a second male engagement portion provided at a rear end portion of the main body portion, and a third male engagement portion provided at a lower end portion of the main body portion.

Abstract: In the engine compartment of a bulldozer the radiator is arranged forward of the engine. An exhaust gas treatment unit is arranged above the engine. A first exhaust gas treatment device of the exhaust gas treatment unit is arranged such that the longitudinal direction of the first exhaust gas treatment device follows the forward-backward direction of the vehicle. A second exhaust gas treatment device of the exhaust gas treatment unit is positioned to the side of the first exhaust gas treatment device, and arranged such that the longitudinal direction of the first exhaust gas treatment device follows the forward-backward direction of the vehicle. The air cleaner is arranged between the radiator and the exhaust gas treatment unit in the forward-backward direction of the vehicle.

Abstract: A bulldozer includes an engine, first and second exhaust treatment apparatuses arranged above the engine, a relay connection pipe connecting the first and second apparatuses, and an engine hood covering upper parts of the first and second apparatuses. The relay connection pipe has a cylindrical shaped main section, a first section connecting the main section and the first apparatus, and a second section connecting the main section and the second apparatus. The lower end of the main section is positioned above upper ends of the first and second apparatuses. The upper surface of the hood has a convex section protruding above the relay connection pipe and a base section formed integrally with the convex section below the convex section. At least a portion of a line segment extending along the upper edge of the main section overlaps an upper surface part of the convex section in a bulldozer top view.

Abstract: A wheel loader includes: a driver's cab; an engine; a chassis, at sides of which tires are provided; an engine room in which the engine is mounted on the chassis, the engine room being provided behind the driver's cab; front portion structures respectively standing at left and right positions of a surface of the engine room, the surface being located at the driver's cab side; rear portion structures respectively standing at left and right positions of a surface of the engine room, the surface being opposite to the surface located at the driver's cab side; and a coupling structure that couples upper portions of the front portion structures to upper portions of the rear portion structures and forms a peripheral device installation space at an upper portion of the engine.

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: A wheel loader comprises an engine, an exhaust gas post-processing device, an engine room, a top plate, a cooling room, a partition wall, and a drainage mechanism. The exhaust gas post-processing device is disposed above the engine in the engine room and includes a diesel particulate filtering device and a selective catalyst reduction catalyst device. The top plate has a sloping part with a height that decreases toward the rear, and a first ventilation part that includes a plurality of through-holes formed in the sloping part. The top plate defines an upper plane of the engine room. The cooling room accommodates a cooling unit and is disposed to the rear of the engine room, separated by the partition wall. The drainage mechanism is disposed below the first ventilation part, and configured to drain water entering the engine room from the first ventilation part to the outside of the engine room.