The invention relates to an acoustic attenuation device (1) for a turbocharger, or for a supercharger, arranged along an air intake line of a vehicle. The attenuation device (1) comprises a gas supply pipe (2) having a peripheral wall (21) and a diameter (d2), the pipe (2) comprising at least one annular chamber (3) defined by a diameter (d3) greater than the diameter (d2) of the pipe (2), the or each annular chamber (3) being sealed by a wall (5) comprising porous material that is positioned in the extension of the peripheral wall (21) of the pipe (2), according to a diameter (d5) substantially equal to the diameter of the pipe (2), in order to allow air to flow between the pipe (2) and the or each peripheral chamber (3).

A sensor arrangement of an internal combustion engine includes an intake duct including one or more curved parts bent or curved and connecting an intercooler and a throttle; and a pressure sensor provided on the intake duct and configured to detect a pressure in the intake duct. The pressure sensor includes a detector disposed close to an outside curved portion of a curved part.

A fault detection unit of an internal combustion engine includes a recirculation pipe connected with an upstream-side part of an intake pipe of the internal combustion engine upstream of a supercharger, the recirculation pipe to supply an evaporated fuel that is unburned and is generated in the internal combustion engine to the intake pipe, and a fault detection unit to detect a leakage occurrence of the recirculation pipe based on a crank-case inner pressure of the internal combustion engine when the internal combustion engine is operating in a specified operation condition that the crank-case inner pressure is a positive pressure.

An air duct assembly attachable to a receiving port includes an air duct with an inner surface and an exterior surface connected to one another at a coupling fixture. A seal is connected and bonded to the coupling fixture. The seal extends axially from the coupling fixture and has a tip with an inner diameter smaller than the coupling fixture's inner diameter. A shell is connected to the coupling fixture and the seal. The shell extends axially from the seal and is connectable to the receiving port.

An intake module of a fresh air system for an internal combustion engine may include a housing having openings through which fresh air is flowable, and a control device for controlling a cross-section of the openings. The control device may include at least one control staff rotationally mounted about an axis rotation on the housing by at least one bearing bracket, and at least one control valve rotationally fixed on the control shaft for at least one of the openings. The housing may have at least one bearing receiving portion having an insertion opening through which the bearing bracket may be inserted in an insertion direction oriented perpendicularly to the axis of rotation. The bearing bracket may have a first bearing part having a first bearing section on which the control shaft rests with a circumferential section, and a second bearing part having a second bearing section opposite the first bearing section on which the control shaft rests with a second circumferential section opposite the first circumferential section. The bearing parts may each have an inner surface facing one another in a transverse direction perpendicular to the axis of rotation and insertion direction, and at least one flat positioning surface extending perpendicularly to the transverse direction and raised from the inner surface. The positioning surfaces of the first and second bearing parts may rest flat against each other, and a gap may be formed in the transverse direction between the inner surfaces outside the positioning surfaces.

In a cowl stay structure for a vehicle which is mounted on a front end part of a body frame having a pair of main frames extending longitudinally to the left and right, and which supports a cowling, a cowl stay supporting the cowling has a front opening which serves as a duct with a hollow structure designed to guide the air taken in from a front side of a vehicle body to an air cleaner box. The cowl stay is mounted on a front surface of a head pipe arranged on the front end of the body frame for establishing a flow path of the front opening with said head pipe opening. A headlight configured to irradiate an area in front of a vehicle with light is placed inside the cowl stay. Such a cowl stay structure has reduced size and weight, and it supports multiple parts.

The present invention provides an admission pipe structure for automobile air admission, wherein internal part in pipe body of admission pipe includes channel, admission hole and exit hole formed on two sides of the channel are installed with first sleeve connection part and second sleeve connection part, and first sleeve connection part and second sleeve connection part are respectively sleeved onto exit connector and admission connector of the admission manifold pipe such that buckling component can be set up in penetration into two through-grooves installed in outer surface of second sleeve connection part thereby using buckling component to block at ring-shaped groove for fixedly positioning. When compressed air coming from the central cooler enters into admission pipe, compressed air can be smoothly guided by arc-shaped channel in pipe body, and aluminum alloy materials in admission pipe itself can prevent damages caused by the high-speed airflow of the compressed air.

A vehicle includes a frame, a left and right front wheel, and a left and right rear wheel. A left front suspension operatively and a right front suspension operatively respectively operatively connect the left and right front wheels to the frame. A left and right rear suspension, respectively operatively connect the left and right rear wheels to the frame. At least one seat, connected to the frame and having a seat base, is disposed longitudinally rearward of the left and right front suspensions. An engine is operatively connected to at least one of the wheels. An air induction system fluidly, which includes an airbox, and a fuel tank fluidly communicate with the engine. The engine, the airbox and the fuel tank are disposed longitudinally forward of the rear suspensions and longitudinally rearward of the seat base of the at least one seat.

An intake module of a fresh air system for an internal combustion engine may include a housing having openings through which fresh air is flowable, and a control device for controlling a cross-section of the openings. The control device may include at least one control staff rotationally mounted about an axis rotation on the housing by at least one bearing bracket, and at least one control valve rotationally fixed on the control shaft for at least one of the openings. The housing may have at least one bearing receiving portion having an insertion opening through which the bearing bracket may be inserted in an insertion direction oriented perpendicularly to the axis of rotation. The bearing bracket may have a first bearing part having a first bearing section on which the control shaft rests with a circumferential section, and a second bearing part having a second bearing section opposite the first bearing section on which the control shaft rests with a second circumferential section opposite the first circumferential section. The bearing parts may each have an inner surface facing one another in a transverse direction perpendicular to the axis of rotation and insertion direction, and at least one flat positioning surface extending perpendicularly to the transverse direction and raised from the inner surface. The positioning surfaces of the first and second bearing parts may rest flat against each other, and a gap may be formed in the transverse direction between the inner surfaces outside the positioning surfaces.

An air cleaner is arranged below a fuel tank of a straddle type disposed above left and right main frames. The air cleaner includes a main chamber which is located between the main frames, and a sub-chamber which is located on the outside in the vehicle width direction of the main frames. A rear section of the sub-chamber and a rear section of the element within the sub-chamber are located in a space formed between each outside wall surface of the main frames and an inside wall surface of the fuel tank. A front section of the sub-chamber and a front section of the element project forwardly of the fuel tank in a side view of the vehicle. The front section of the sub-chamber is provided with the fastening means for fastening the side cover (the element lid) which covers the element from the outside in the vehicle width direction.