Provided is a sound insulation structure for an internal combustion engine that facilitates the assembly work, and minimizes the transmission vibrations and noises. The sound insulation structure for an internal combustion engine comprises a cover main body (21) disposed outside of a main body (10) of the internal combustion engine and covering at least a part of the engine main body, and a foam sound insulation member (22) made of a foam material and attached to an inner surface (21a) of the cover main body facing the engine main body. The foam sound insulation member covers a noise source (11) of the engine main body and abuts the engine main body or a component part (12, 14) attached to the engine main body at an outer periphery thereof so as to interpose the noise source. The engine main body or the component part includes a sound insulation wall (31-33) projecting therefrom so as to shield a junction part at which the foam sound insulation member abuts or adjoins the engine main body or the component part thereof and the sound insulation wall is covered by the cover main body.

A retainer for fastening a component, especially a fuel distributor, via a holding element to an internal combustion engine includes: decoupling elements, a fastening body and a fastening element. The fastening body is fastened to the internal combustion engine with the aid of the fastening element. In addition, the holding element is fastened to the fastening body via the decoupling elements. Moreover, a preloading element is provided that is joined to the fastening body, preloading of the decoupling elements being set by way of a predefined position of the preloading element relative to the fastening body in which the preloading element is joined to the fastening body.

Provided is a timing chain cover that allows suppressing vibration transmission. A timing chain cover of the present disclosure houses a timing chain transmitting a rotative force of a crankshaft to a camshaft in one end side of an internal combustion engine. The timing chain cover includes a chain cover main body and a damping resin layer formed on an abutment surface of the chain cover main body. The abutment surface abuts on an internal combustion engine main body. The damping resin layer contains a heat resistant resin and a damping filler. The damping filler converts a vibration energy into a heat energy.

A chain cover is configured to cover a timing chain that transmits rotation of a crankshaft of an internal combustion engine to a camshaft. The chain cover includes a crankshaft-side opening forming portion that defines a crankshaft-side opening into which the crankshaft is inserted, and a general portion that is a section different from the crankshaft-side opening forming portion. The crankshaft-side opening forming portion is made of a first material. The general portion is made of a second material. The first material and the second material are different from each other.

The present invention provides an engine cover that can be manufactured easily and at a lower cost and has an attachment member that is high in quality and may not easily fall off. The engine cover has a cover body made of urethane foam, a skin layer disposed on a surface of the cover body, and an attachment member made of an elastic body and integrally molded with the cover body. The attachment member has a recess into which an attachment pin provided to project from an engine member is fitted, and a sealing portion that is provided to project at least one of the opening end surface of the recess and the side surface of the opening end part of the recess and that suppresses entry of a foamed urethane resin material that forms the cover body into the recess during integral molding.

A low-noise main bearing cap for an internal combustion engine is designed that includes a main bearing cap body, wherein the main bearing cap body is connected to an engine body main bearing seat. The main bearing cap body is provided with a vibration isolator A vibration isolation structure is provided between the main bearing cap body and the vibration isolator The main bearing cap body is connected with the vibration isolator through a connector The vibration isolation structure comprises an S-shaped structure and an oil film gap, and the vibration isolator is provided with an oil inlet passage which is communicated with the oil film gap. The present design solves the control problem of the main bearing vibration source caused by the main bearing load.

Provided is a timing chain cover that allows suppressing vibration transmission. A timing chain cover of the present disclosure houses a timing chain transmitting a rotative force of a crankshaft to a camshaft in one end side of an internal combustion engine. The timing chain cover includes a chain cover main body and a damping resin layer formed on an abutment surface of the chain cover main body. The abutment surface abuts on an internal combustion engine main body. The damping resin layer contains a heat resistant resin and a damping filler. The damping filler converts a vibration energy into a heat energy.

An engine cover member mounting structure, including: an engine body; a peripheral member arranged on an outer wall of the engine body; a cover member arranged between the outer wall and the peripheral member; and a harness routed between the outer wall and the peripheral member, wherein the harness is held on a surface of the cover member.

A crank cap assembly including a single crank cap rotatably supporting a crankshaft includes: a fastening member fastened to the crank cap, a mass member; and an elastic rubber member elastically attaching the mass member to the crank cap. The elastic rubber member includes a first rubber part arranged between the fastening member and the mass member and a second rubber part arranged between the crank cap and the mass member. The first rubber part and the second rubber part are arranged to be aligned in the mounting direction when attaching the crank cap to an engine body, and the elastic rubber member is formed so that a length in the mounting direction is longer than a maximum length in a cross-section of the elastic rubber member perpendicular to the mounting direction.

To secure detection accuracy of a temperature sensor in a general purpose engine. A general purpose engine includes an engine main body (21), an output shaft (22) that outputs a rotation force of the engine main body, a cooling fan (40) that is rotated and driven by the output shaft, a cooling cover (50) that is fixed to the engine main body to define a cooling air passage (CP) which guides cooling air generated by the cooling fan along an exterior wall (21e) of the engine main body, and a temperature sensor (60) that is fixed to the engine main body in a region away from the cooling air passage (CP). Accordingly, it is possible to measure a temperature of the engine main body with high accuracy and perform electronic control of fuel injection with high accuracy.