초록 ▼

A noise reducing cover for use with an internal combustion engine, taking the form of a cylinder head cover, an oil pan, a valley cover, a valve lifter cover or the like, is constructed of a main body portion of a resilient porous material, and an inner skin layer of a resilient non-porous material,

A noise reducing cover for use with an internal combustion engine, taking the form of a cylinder head cover, an oil pan, a valley cover, a valve lifter cover or the like, is constructed of a main body portion of a resilient porous material, and an inner skin layer of a resilient non-porous material, securely connected to the inside of the main body portion. The noise reducing cover excludes a hard layer made of metal or hard plastic, thereby suppressing vibration of the noise reducing cover itself even when engine vibration is transmitted thereto.

대표청구항 ▼

A noise reducing cover for an internal combustion engine, comprising: a body portion formed into a self supporting three dimensional shape of a first vibration and sound absorbing porous material; an inner layer formed of a second vibration and sound absorbing material, securely connected to the inn

A noise reducing cover for an internal combustion engine, comprising: a body portion formed into a self supporting three dimensional shape of a first vibration and sound absorbing porous material; an inner layer formed of a second vibration and sound absorbing material, securely connected to the inner side of said body portion to form a composite, the inner layer being adapted to be directly connected to a surface of the engine and impervious to liquids; and wherein the Shore hardness (HsD) of said composite is lower than 70.