A vehicle lower structure includes an internal combustion engine arranged in an engine compartment of a vehicle; a lower cover arranged below the internal combustion engine and formed so as to cover a lower portion of the engine compartment; and one or more baffle plates arranged between the internal combustion engine and the lower cover. The one or more baffle plates are located within a range of the width of the internal combustion engine in the engine compartment with respect to the front-rear direction of the vehicle. The one or more baffle plate protrude toward the lower cover from the side of the internal combustion engine or toward the internal combustion engine from the side of the lower cover with respect to the top-bottom direction of the vehicle. The one or more baffle plate are formed so as to extend to the left-right direction of the vehicle.

A vehicle wheel has a Helmholtz resonator (sub-air chamber member) mounted thereon with an adhesive material, and a thickness of the adhesive material on a part (adhesive strength increasing part) of the Helmholtz resonator on which centrifugal force acts strongly during rotation of the wheel is set to be thicker than a thickness of the adhesive material on other parts (regular part) of the Helmholtz resonator. When the thickness of the adhesive material is increased, peel strength of the adhesive material is enhanced accordingly.

A sound proof material here disclosed comprises an exterior material layer 8 including a holding material 3 made of a woven fabric and a skin material 2 made of a thermoplastic resin film, and a sound absorbing material layer 9, the exterior material layer 8 being laminated on the sound absorbing material layer 9 so that the skin material 2 is located on the surface side of the sound proof material, whereby the sound proof material can endure long-time use without deterioration in moldability under inhibition of aging in severe operating environments so that the sound proof material can be suitably used while suppressing sound from a sound source around an engine installed in an engine compartment of an automobile.

A cover for a seatbelt retractor assembly comprising: a first layer having an inside surface configured to face a seatbelt webbing retracted by a seatbelt retractor assembly, an outside surface configured to face away from the seatbelt webbing, a plurality of holes disposed through the first layer from the inside surface through to the outside surface, and baffles adjacent each of the plurality of holes. The cover reduces audible noise generated by moving components of the seatbelt retractor assembly. The baffles adjacent each of the plurality of holes are disposed on the inside surface. The cover can further include a second layer, which includes a sound absorbing material such as foam. The second layer at least partially covers the outside surface of the first layer and covers the plurality of holes. The cover can further include snap fit fastening elements to connect the cover to the seatbelt retractor assembly.

The vehicle front structure includes a radiator located in a vehicle front so that air passes through a vehicle rear, a radiator fan located in the vehicle rear of the radiator so as to generate an air flow flowing from the vehicle front to the radiator, an engine located in the vehicle rear of the radiator fan, and an engine soundproof cover having a front cover portion for covering a portion of a front surface of the engine, and guiding the air passing through the radiator fan to flow upward of the engine by using the front cover portion.

A flywheel housing assembly for an internal combustion engine includes a flywheel housing for accommodating a flywheel. The flywheel housing is configured to connect with a part of the internal combustion engine, the flywheel housing further having an outer side region intended to face an oil pan of the internal combustion engine, wherein the outer side region comprises a through hole and a vibration absorbing material portion arranged to seal the through hole.

A motor oil pump assembly includes: a motor component; an oil pump component, where the oil pump component is supported on an end cover of the motor component; an inner sound insulation enclosure, where the inner sound insulation enclosure encloses the oil pump component, and the inner sound insulation enclosure and the oil pump component define an inner sound insulation cavity filled with low-pressure oil; and a pre-tightening buffering component, where the pre-tightening buffering component is pressed between an upper end cover of the oil pump component and the inner sound insulation enclosure, and the pre-tightening buffering component is in communication with a high-pressure cavity of the oil pump component.

The invention provides an exhaust purification device capable of suppressing the temporal decrease in NOx catalyst removal efficiency due to soot accumulation. The invention provides an exhaust purification device using an air injection nozzle to inject pressurized air into a casing of a catalyst reactor containing an NOx catalyst as a catalyst and removing soot adhering to the NOx catalyst, wherein it is determined and externally notified that there is abnormal deterioration in the NOx catalyst when the pressure difference P in exhaust between the upstream and downstream sides of the NOx catalyst has increased by at least a first reference pressure difference increase Pt1, which is the allowable amount of pressure difference increase, above the pressure difference Pi in exhaust between the upstream and downstream sides of the catalyst in the initial state at the same exhaust flow rate Ve.

A semi-rigid panel of foam insulation is secured transversely between the front fenders and certain body structures of a motor vehicle at several locations. Specifically, the insulation is located and secured to the fender by a retainer or clip having a channel that receives the insulation panel; the panel includes projections or lugs that are complementary to and seat within with frame or body member openings, ribs or other features; is secured within an integrated bracket or holder in the upper plenum having a slot or channel having a width equal to the thickness of the insulation; and includes a hook or lip that is received within an air inlet of the heating and air conditioning system of the vehicle.

A sound insulator for a vehicle cabin pressure relief valve includes a first wall, a second wall, and a third wall. The first wall is configured to inhibit sound from travelling in a lateral direction from the pressure relieve valve to a passenger compartment in the vehicle cabin. The second wall projects from the first wall and is configured to inhibit sound from travelling in a first longitudinal direction from the pressure relieve valve to the passenger compartment. The second wall is oriented at a first angle relative to the first wall. The third wall projects from the first wall and is configured to inhibit sound from travelling in a vertical direction from the pressure relieve valve to the passenger compartment. The third wall is oriented at a second angle relative to the first wall. The first and second angles are adjustable without damaging the sound insulator.