Supercharger system noise reduction

A ducting system for communicating pressurized fluid from a supercharger to an intercooler and from the intercooler to an internal combustion engine, the supercharger mounted on the engine and the engine supported on a relatively rigid platform by engine mounts allowing movement of the engine relative to the platform within first limits, the intercooler supported on the platform by vibration isolator mounts allowing movement of the intercooler relative to the platform within limits less than the first limits;

• the system comprising:
• first duct means including first and second rigid duct members respectively fixed at one end portion thereof to the supercharged and the intercooler, a third rigid duct member interposed between the other end portions of the first and second duct members, the other end portions and opposite end portions of the third duct member telescopically receiving each other with the telescoping end portions of the duct walls being radially spaced apart to allow articulation of the third member relative to the first and second members in response to relative movement of the supercharger and intercooler;
• second duct means including fourth and fifth rigid duct members respectively fixed at one end portion thereof to the intercooler and engine, a sixth rigid duct member interposed between the other end portions of the fourth and fifth duct members, the other end portions and opposite end portions of the third duct member telescopically receiving each other with the telescoping end portions of the duct walls being radially spaced apart to allow articulation of the sixth member relive to the fourth and fifth members in response to relative movement of the engine and intercooler;
• a flexible seal disposed in the radial space between the duct walls;
• and
• retaining means substantially preventing relative axial movement of the telescoping duct portions and allowing said articulation.

A ducting system for communicating a pressurized fluid between first and second relatively movable components, the first component including an internal combustion engine supported on a platform by engine mounts allowing movement of the engine relative to platform within first limits, the system including:

• first and second rigid duct members respectively fixed at one end portion thereof to one of the components and a third rigid duct member interposed between the other end portions of the first and second duct members, the other end portions and opposite end portions of the third duct member telescopically receiving each other with the telescoping end portions of the duct walls being radially spaced apart to allow articulation of the third member relative to the first and second members in response to relative movement of the components;
• a flexible seal disposed in the radial space between the duct walls;
• retaining means substantially preventing relative axial movement of the telescoping duct portions and allowing said articulation;
• said engine mounts generally define a torque roll axis for the engine with the magnitude of the engine roll being within said first limits and proportional to the magnitude of engine torque;
• said other end of the first rigid duct being radially spaced from the torque roll axis;
• and
• the longitudinal axes of said telescoping end portions being positioned substantially parallel to the torque roll axis to minimize axial movement of the telescoping end portions in response to engine roll.

A ducting system for communicating a pressurized fluid between first and second relatively movable components, the first component including an internal combustion engine supported on a platform by engine mounts allowing movement of the engine relative to the platform within first limits, the system including:

• first and second rigid duct members respectively fixed at one end portion thereof to one of the components and a third rigid duct member interposed between the other end portions of the first and second duct members, the other end portions and opposite end portions of the third duct member telescopically receiving each other with the telescoping end portions of the duct walls being radially spaced apart to allow articulation of the third member relative to the first and second members in response to relative movement of the components;
• a flexible seal disposed in the radial space between the duct walls;
• retaining means substantially preventing relative axial movement of the telescoping duct portions and allowing said articulation;
• said engine mounts generally define a torque roll axis for the engine with the magnitude of engine roll being within said first limits and proportional to the magnitude of engine torque;
• said other end of the first rigid duct being radially spaced from the torque roll axis;
• and
• the longitudinal axes of said telescoping end portions being positioned substantially parallel to radii extending from the torque roll axis to minimize axial movement of the telescoping end portions in response to engine roll.