Disclosed is an acoustically and thermally effective engine and/or aggregate capsule which completely encloses the engine and/or aggregate.

Disclosed is an acoustically and thermally effective engine and/or aggregate capsule which completely encloses the engine and/or aggregate.

A vehicle front structure includes, below a bonnet (6), a cover member (1) that covers an engine from an upper portion thereof to the side and is formed by an upper wall (30), a shroud (8) as a front wall, a rear wall (13), and side walls (11, 12) on the respective left and right sides. The cover member is formed by the upper wall, the front wall, the rear wall, and the side walls on the respective left and right sides. The front side of one of the left and right side walls is configured to have, relative to the rear side, a higher ratio of a low-rigidity member having lower rigidity than a high-rigidity member forming a main portion on the rear side.

An air-cooled diesel generator is provided, and relates to the technical field of diesel generator sets. The air-cooled diesel generator comprises a box body and multiple components provided in the box body, and each component is provided with a separate housing outside; a main air inlet and a main air outlet are formed in the box body, a sub-air inlet and a sub-air outlet are formed in each housing, each sub-air outlet communicates with the main air outlet through an air duct, and each sub-air inlet is provided with an air guide device. Therefore, the air-cooled diesel generator is provided which has better heat dissipation performance.

An air-cooled diesel generator is provided, and relates to the technical field of diesel generator sets. The air-cooled diesel generator comprises a box body and multiple components provided in the box body, and each component is provided with a separate housing outside; a main air inlet and a main air outlet are formed in the box body, a sub-air inlet and a sub-air outlet are formed in each housing, each sub-air outlet communicates with the main air outlet through an air duct, and each sub-air inlet is provided with an air guide device. Therefore, the air-cooled diesel generator is provided which has better heat dissipation performance.

A turbocharger includes an acoustic damper for attenuating noise from the compressor. The damper includes inner and outer duct walls defining an annular cavity therebetween, the outer duct being longer than the inner duct. An upstream wall bounds the annular cavity at the upstream end and defines an inlet aperture for fluid to pass through into the inner duct, and a downstream wall is axially spaced from the downstream end of the inner duct so as to define an expansion chamber fluidly connected to the annular cavity. The downstream wall defines an outlet aperture for the fluid. Partition walls between the two ducts partition the annular cavity into at least a first Helmholtz resonator and a first quarter-wave resonator that are axially serially arranged, and a second quarter-wave resonator that is circumferential serially arranged with respect to the first Helmholtz resonator.

A method for manufacturing a waterproof felt duct may include (a) laminating a waterproof film on one side of a first nonwoven fabric and laminating a second nonwoven fabric on the waterproof film laminated on the first nonwoven fabric to form a laminated body; (b) forming a waterproof felt base material by thermally adhering the laminated body; (c) cutting the waterproof felt base material into a desired shape; (d) molding a duct while surrounding the waterproof felt base material cut into the desired shape around the external surface of a molding jig having a worm gear shape; (e) heat-treating the molded duct; (f) cooling the heat-treated duct; and (g) ejecting the cooled duct from the molding jig.

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.

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.

An acoustic insulation structure for a power train according to the present disclosure is provided with a cover member that covers at least an internal combustion engine of the power train including the internal combustion engine, and that includes a pool portion in which water that has entered into the inside of the cover member pools; and a water-absorption member arranged at the inside of the cover member. The cover member includes a moisture outlet that releases, into the atmospheric air, moisture present inside the cover member. The water-absorption member extends to the moisture outlet from the pool portion.