A tractor including: a traveling body having an engine; a post-processing device configured to purify exhaust gas of the engine; and a reductant tank configured to store a reductant to be supplied to the post-processing device. A pair of left and right fuel tanks are arranged respectively on left and right sides of a longitudinally midway portion of the traveling body. A tank-accommodation recess for accommodating a reductant tank is formed at a lower-front portion of one of the left and right fuel tanks. While the reductant tank is accommodated in the tank-accommodation recess, an upper front portion of the fuel tank and the reductant tank are aligned up and down.

A tractor including: a traveling body having an engine; a post-processing device configured to purify exhaust gas of the engine; and a reductant tank configured to store a reductant to be supplied to the post-processing device. A pair of left and right fuel tanks are arranged respectively on left and right sides of a longitudinally midway portion of the traveling body. A tank-accommodation recess for accommodating a reductant tank is formed at a lower-front portion of one of the left and right fuel tanks. While the reductant tank is accommodated in the tank-accommodation recess, an upper front portion of the fuel tank and the reductant tank are aligned up and down.

A multiple fuel tank purge system and method includes providing a pair of fuel tanks, including a main fuel tank for containing impure fuel and a separate, auxiliary fuel tank that contains commercial canned fuel. The engine runs on the impure fuel from the main fuel tank while the engine is in normal use, and then employs a shutdown cycle that switches to the commercial canned fuel from the auxiliary fuel tank for some pre-set time period. This arrangement allows the engine to be purged of the impure fuel (by burning the impure fuel during the shutdown cycle) and replaced by the commercial pre-mixed fuel before the engine is finally shut down. The system may further include a novel fuel cap with a fuel line, a tank within a tank fuel container, and/or an electronically actuated shutdown cycle mechanism.

A multiple fuel tank purge system and method includes providing a pair of fuel tanks, including a main fuel tank for containing impure fuel and a separate, auxiliary fuel tank that contains commercial canned fuel. The engine runs on the impure fuel from the main fuel tank while the engine is in normal use, and then employs a shutdown cycle that switches to the commercial canned fuel from the auxiliary fuel tank for some pre-set time period. This arrangement allows the engine to be purged of the impure fuel (by burning the impure fuel during the shutdown cycle) and replaced by the commercial pre-mixed fuel before the engine is finally shut down. The system may further include a novel fuel cap with a fuel line, a tank within a tank fuel container, and/or an electronically actuated shutdown cycle mechanism.

A high-pressure vessel mounting structure includes: a plurality of high-pressure vessels arranged on the upper surface of a bottom wall in a front-rear direction of a vehicle body with a vehicle width direction as an axial direction; a plurality of load transmission members each provided between the high-pressure vessels on the bottom wall and extending along the axial direction; a connection member that connects one axial end of each of the high-pressure vessels; and a support member that supports the other axial end of each of the high-pressure vessels, and the support member can move relatively inward in the vehicle width direction with respect to the high-pressure vessel when a load is input from outside in the vehicle width direction.

A rear structure of a vehicle includes: a rear floor, and a pair of diagonal members coupled to a bottom surface of the rear floor, extending obliquely from both sides of the rear floor to a rear side of the rear floor, and symmetrical with respect to a longitudinal centerline of the rear floor. The rear structure further includes a pair of side extensions coupled to the bottom surface of the rear floor at the both sides of the rear floor, respectively, and extending in a longitudinal direction of the rear floor. The rear structure includes a cross member disposed between the pair of side extensions at a rear bottom surface of the rear floor, and the cross member has both ends each spaced apart from a corresponding side extension.

Disclosed herein is a fluid container for a vehicle, the fluid container having at least one passageway which extends therethrough between opposing faces of the fluid container, the at least one passageway being configured to be attachably mounted on the vehicle and wherein the or each passageway internal to the fluid container is configured to inhibit movement of the fluid contained therein.

Disclosed herein is a fluid container for a vehicle, the fluid container having at least one passageway which extends therethrough between opposing faces of the fluid container, the at least one passageway being configured to be attachably mounted on the vehicle and wherein the or each passageway internal to the fluid container is configured to inhibit movement of the fluid contained therein.

A shovel includes a lower traveling body, an upper turning body turnably attached to the lower traveling body, a boom pivotably attached to the upper turning body, an arm pivotably attached to the boom, an engine mounted on the upper turning body, a hydraulic pump mounted on the upper turning body, a fuel tank mounted on the upper turning body, a work walkway provided on an upper surface of the fuel tank for the movement of a worker, and a rollover valve provided at the top of the fuel tank at a position different from the work walkway.

A shovel includes a lower traveling body, an upper turning body turnably attached to the lower traveling body, a boom pivotably attached to the upper turning body, an arm pivotably attached to the boom, an engine mounted on the upper turning body, a hydraulic pump mounted on the upper turning body, a fuel tank mounted on the upper turning body, a work walkway provided on an upper surface of the fuel tank for the movement of a worker, and a rollover valve provided at the top of the fuel tank at a position different from the work walkway.