Abstract: An exhaust-gas purification device disposition structure of a vehicle, comprises a fuel tank with a fuel supply port which is disposed so as to be open to an outside of a vehicle compartment, and a urea tank to accommodate urea water solution as deoxidizer to purify exhaust gas. The urea tank is disposed outside the vehicle compartment, and a pouring port of the urea tank is provided inside the vehicle compartment. Accordingly, the urea water solution can be surely prevented from entering into the vehicle compartment even in case of the breakage of the urea tank, and the mistake of supplying the wrong liquid into the wrong supply (pouring) port tank which may be made by confusing the ports can be avoided.

Abstract: A tunnel-expansion portion is provided at a front portion of a tunnel portion. The tunnel-expansion portion projects upward greatly and widely so as to provide components of an exhaust system that extend rearward from an exhaust manifold therein (outside a vehicle compartment). Accordingly, there can be provided a front structure of a vehicle, in which an engine is laterally disposed in an engine room at a front portion of the vehicle, an intake pipe is disposed in front of the engine, and an exhaust pipe is disposed in back of the engine, which can improve an exhaust efficiency and a vehicle safety against a vehicle crash, without providing an improperly-large longitudinal space between the engine and the dash panel.

Abstract: An exhaust-gas purification device disposition structure of a vehicle, comprises a fuel tank with a fuel supply port which is disposed so as to be open to an outside of a vehicle compartment, and a urea tank to accommodate urea water solution as deoxidizer to purify exhaust gas. The urea tank is disposed outside the vehicle compartment, and a pouring port of the urea tank is provided inside the vehicle compartment. Accordingly, the urea water solution can be surely prevented from entering into the vehicle compartment even in case of the breakage of the urea tank, and the mistake of supplying the wrong liquid into the wrong supply (pouring) port tank which may be made by confusing the ports can be avoided.

Abstract: A tunnel-expansion portion is provided at a front portion of a tunnel portion. The tunnel-expansion portion projects upward greatly and widely so as to provide components of an exhaust system that extend rearward from an exhaust manifold therein (outside a vehicle compartment). Accordingly, there can be provided a front structure of a vehicle, in which an engine is laterally disposed in an engine room at a front portion of the vehicle, an intake pipe is disposed in front of the engine, and an exhaust pipe is disposed in back of the engine, which can improve an exhaust efficiency and a vehicle safety against a vehicle crash without providing an improperly-large longitudinal space between the engine and the dash panel.

Abstract: Disclosed is an automobile underbody structure, wherein a pair of laterally-spaced floor frames 10 are disposed to extend longitudinally in such a manner as to interpose a tunnel region 6 of a front floor portion 2 therebetween and joined to a bottom surface of the front floor portion 2, and a cross member 15, 16 is disposed to extend laterally so as to connect each side-sill 7 and the tunnel region 6 and joined to a top surface of the front floor portion 2. Each of the floor frames 10 is gradually inclined laterally inward toward the rear end thereof so as to be obliquely disposed relative to the cross member 15, 16 in top plan view. A rearward displacement of the floor frames 10 during a head-on collision exerts a compressive force on a region of the cross member 15, 16 located on the laterally outward side relative to each of the floor frames 10, and a tensile force on a region of the cross member 15, 16 located on the laterally inward side relative to each of the floor frames 10.

Abstract: Disclosed is an underbody structure for an automobile, which comprises a pair of laterally-spaced floor frames 10 disposed to extend longitudinally in such a manner as to interpose a tunnel region 6 therebetween and joined to a bottom surface of a front floor portion 2. Each of the floor frames 10 has a rear end located in the vicinity of a rear kick-up portion 3 extending upward from a rear end of the front floor portion 2. The rear kick-up portion 3 and each rear end region of the floor frames 10 are connected to one another from the exterior side of the automobile through an end gusset 45 (47, 48). The end gusset 45 (47, 48) may be designed to define a closed section in cooperation with the rear kick-up portion 3, or to extend laterally outward so as to be connected to a front end region of a rear frame 17. The underbody structure of the present invention can prevent or suppress a rearward movement of each rear end of the floor frames during a head-on collision.

Abstract: Disclosed is an underbody structure for an automobile, which comprises a pair of laterally-spaced floor frames 10 disposed to extend longitudinally in such a manner as to interpose a tunnel region 6 therebetween and joined to a bottom surface of a front floor portion 2. Each of the floor frames 10 has a rear end located in the vicinity of a rear kick-up portion 3 extending upward from a rear end of the front floor portion 2. The rear kick-up portion 3 and each rear end region of the floor frames 10 are connected to one another from the exterior side of the automobile through an end gusset 45 (47, 48). The end gusset 45 (47, 48) may be designed to define a closed section in cooperation with the rear kick-up portion 3, or to extend laterally outward so as to be connected to a front end region of a rear frame 17. The underbody structure of the present invention can prevent or suppress a rearward movement of each rear end of the floor frames during a head-on collision.

Abstract: Disclosed is an automobile underbody structure, wherein a pair of laterally-spaced floor frames 10 are disposed to extend longitudinally in such a manner as to interpose a tunnel region 6 of a front floor portion 2 therebetween and joined to a bottom surface of the front floor portion 2, and a cross member 15, 16 is disposed to extend laterally so as to connect each side-sill 7 and the tunnel region 6 and joined to a top surface of the front floor portion 2. Each of the floor frames 10 is gradually inclined laterally inward toward the rear end thereof so as to be obliquely disposed relative to the cross member 15, 16 in top plan view. A rearward displacement of the floor frames 10 during a head-on collision exerts a compressive force on a region of the cross member 15, 16 located on the laterally outward side relative to each of the floor frames 10, and a tensile force on a region of the cross member 15, 16 located on the laterally inward side relative to each of the floor frames 10.