Engine-cooling system

Claim 2

For use with an automotive engine having a rotating shaft extending therefrom, an engine-cooling system comprising a viscous fluid clutch including a housing mounted on a bearing, said bearing being rotatably mounted on said shaft, and a clutch plate member secured to the end of said shaft and rotatably mounted in said housing for variable relative rotation therewith, said clutch plate member and the rear wall of said housing having opposed, spaced parallel surfaces defining a fluid shear space therebetween and cooperable with a fluid medium in said shear space to provide a shear-type fluid drive therebetween; front coupling pulley means secured to said rear wall of said housing for rotation therewith; first and second fan pulleys rotatably mounted on opposite sides of said front coupling pulley means; first and second fans secured to said first and second fan pulleys, respectively; endless belt means operatively connected around said front coupling pulley means and each of said first and second fan pulleys for rotating said fan pulleys at a constant speed ratio with respect to the speed of said housing and at a variable speed ratio with respect to the speed of said rotating shaft; rear coupling pulley means secured to said rotating shaft; at least one engine accessory pulley; an endless belt operatively connected around said engine accessory pulley and said rear coupling pulley means for rotating said engine accessory pulley at a constant speed ratio with respect to the speed of said rotating shaft, and a power steering pump pulley mounted in the plane of at least one of said fan pulleys and said front coupling pulley means and adapted to be driven by said endless belt means operatively connected around said fan pulleys and said front coupling pulley means.

Claim 3

For use with an automotive engine having an engine drive shaft extending therefrom, an engine cooling system comprising a viscous fluid clutch including a housing mounted on a bearing, said bearing being axially fixed on said shaft, and a clutch plate member secured directed to the end of said shaft for drive thereby and rotatably mounted in said housing for variable relative rotation therewith, said clutch plate member and the rear wall of said housing having opposed, spaced parallel surfaces defining a fluid shear space therebetween and cooperable with a fluid medium in said shear space to provide a shear-type fluid drive from said plate to said housing; pulley groove means formed on said rear wall of said housing; first and second driven fan pulleys rotatably mounted on opposite sides of said pulley groove means on said reaR wall; first and second fans secured to said first and second driven fan pulleys, respectively; endless belt means operatively connected around said pulley groove means and each of said first and second fan pulleys for rotating said fan pulleys at a constant speed ratio with respect to the speed of said housing and at a variable speed ratio with a respect to the speed of said engine-rotated shaft; a multiple-groove idler pulley; a multiple-groove drive pulley directly secured to said engine-rotated drive shaft between the viscous fluid clutch and the engine and driven thereby; a plurality of engine accessory driven pulleys; and a plurality of endless belts with one belt connected around each of said plurality of engine accessory driven pulleys and some one groove of said multiple-groove drive pulley and some one groove of said multiple-groove idler pulley for rotating said engine accessory driven pulleys at a constant speed ratio with respect to the speed of said engine-rotated shaft.

Claim 4

For use with an automotive engine having an engine drive shaft extending therefrom, an engine cooling system comprising a viscous fluid clutch including a housing mounted on a bearing, said bearing being axially fixed on said shaft, and a clutch plate member secured directed to the end of said shaft for drive thereby and rotatably mounted in said housing for variable relative rotation therewith, said clutch plate member and the rear wall of said housing having opposed, spaced parallel surfaces defining a fluid shear space therebetween and cooperable with a fluid medium in said shear space to provide a shear-type fluid drive from said plate to said housing; pulley groove means formed on said rear wall of said housing; first and second driven fan pulleys rotatably mounted on opposite sides of said pulley groove means on said reaR wall; first and second fans secured to said first and second driven fan pulleys, respectively; endless belt means operatively connected around said pulley groove means and each of said first and second fan pulleys for rotating said fan pulleys at a constant speed ratio with respect to the speed of said housing and at a variable speed ratio with a respect to the speed of said engine-rotated shaft; a multiple-groove idler pulley; a multiple-groove drive pulley directly secured to said engine-rotated drive shaft between the viscous fluid clutch and the engine and driven thereby; a plurality of engine accessory driven pulleys; and a plurality of endless belts with one belt connected around each of said plurality of engine accessory driven pulleys and some one groove of said multiple-groove drive pulley and some one groove of said multiple-groove idler pulley for rotating said engine accessory driven pulleys at a constant speed ratio with respect to the speed of said engine-rotated shaft.

Claim 5

For use with an automotive engine having an engine drive shaft extending therefrom, an engine-cooling system comprising a viscous fluid clutch including a housing mounted on a bearing, said bearing being axially fixed on said shaft, and a clutch plate member secured directly to the end of said shaft for drive thereby and rotatably mounted in said housing for variable relative rotation therewith, said clutch plate member and the rear wall of said housing having opposed, spaced parallel surfaces defining a fluid shear spaced therebetween and cooperable with a fluid medium in said shear space to provide a shear-type fluid drive from said plate to said housing; a pair of drive pulley grooves formed on said rear wall of said housing; an idler pulley having a pair of pulley grooves formed therein; first and second driven fan pulleys rotatably mounted on opposite sides of said pair of drive pulley grooves on said rear wall; first and second fans secured to said first and second driven fan pulleys, respectively; separate endless belt means respectively operatively connected around each of said idler pulley grooves, each of said pair of grooves on said rear wall, and each of said first and second fan pulleys for rotating said fan pulleys at a constant speed ratio with respect to the speed of said housing and at a variable speed ratio with respect to the speed of said engine-driven shaft, a multiple-groove idler pulley; a multiple-groove drive pulley directly secured to said engine-rotated drive shaft between the viscous fluid clutch and the engine and driven thereby; a plurality of engine accessory driven pulleys; and a plurality of endless belts with one belt connected around each of said plurality of engine accessory driven pulleys and some one groove of said pulley grooves of said multiple-groove drive pulley and some one groove of said multiple-groove idler pulley for rotating said engine accessory driven pulleys at a constant speed ratio with respect to the speed of said engine-rotated shaft.

Claim 6

For use with an automotive engine having an engine drive shaft extending therefrom, an engine-cooling system comprising a viscous fluid clutch including a housing mounted on a bearing, said bearing being axially fixed on said shaft, and a clutch plate member secured directly to the end of said shaft for drive thereby and rotatably mounted in said housing for variable relative rotation therewith, said clutch plate member and the rear wall of said housing having opposed, spaced parallel surfaces defining a fluid shear spaced therebetween and cooperable with a fluid medium in said shear space to provide a shear-type fluid drive from said plate to said housing; a pair of drive pulley grooves formed on said rear wall of said housing; an idler pulley having a pair of pulley grooves formed therein; first and second driven fan pulleys rotatably mounted on opposite sides of said pair of drive pulley grooves on said rear wall; first and second fans secured to said first and second driven fan pulleys, respectively; separate endless belt means respectively operatively connected around each of said idler pulley grooves, each of said pair of grooves on said rear wall, and each of said first and second fan pulleys for rotating said fan pulleys at a constant speed ratio with respect to the speed of said housing and at a variable speed ratio with respect to the speed of said engine-driven shaft, a multiple-groove idler pulley; a multiple-groove drive pulley directly secured to said engine-rotated drive shaft between the viscous fluid clutch and the engine and driven thereby; a plurality of engine accessory driven pulleys; and a plurality of endless belts with one belt connected around each of said plurality of engine accessory driven pulleys and some one groove of said pulley grooves of said multiple-groove drive pulley and some one groove of said multiple-groove idler pulley for rotating said engine accessory driven pulleys at a constant speed ratio with respect to the speed of said engine-rotated shaft.

Claim 7

For use with an automotive engine having an engine drive shaft extending therefrom, an engine-cooling system comprising a viscous fluid clutch including a housing mounted on a bearing, said bearing being axially fixed on said shaft, and a clutch plate member secured directly to the end of said shaft for drive thereby and rotatably mounted in said housing for variable relative rotation therewith, said clutch plate member and the rear wall of said housing having opposed, spaced parallel surfaces defining a fluid shear space therebetween and cooperable with a fluid medium in said shear space to provide a shear-type fluid drive from said plate to said housing; a single-groove pulley formed on said rear wall of said housing; first and second driven fan pulleys rotatably mounted on opposite sides of said front single-groove pulley and at different levels therewith; first and second fans secured to said first and second driven fan pulleys, respectively; an endless belt mounted around said single-groove pUlley and extending in opposite directions therefrom to and around each of said first and second driven fan pulleys and thence directly between said fan pulleys for rotating said fan pulleys at a constant speed ratio with respect to the speed of said housing and at a variable speed ratio with respect to the speed of said engine-rotated shaft; a multiple-groove idler pulley; a multiple-groove drive pulley directly secured to said engine-rotated drive shaft between the viscous fluid clutch and the engine and driven thereby; a plurality of engine accessory driven pulley; and a plurality of endless belts with one belt mounted around each of said engine accessory driven pulleys and some one groove of said multiple-groove drive pulley and some one groove of said multiple-groove idler pulley for rotating said engine accessory driven pulleys at a constant speed ratio with respect to the speed of said engine-rotated shaft.

Claim 8

For use with an automotive engine having an engine drive shaft extending therefrom, an engine-cooling system comprising a viscous fluid clutch including a housing mounted on a bearing, said bearing being axially fixed on said shaft, and a clutch plate member secured directly to the end of said shaft for drive thereby and rotatably mounted in said housing for variable relative rotation therewith, said clutch plate member and the rear wall of said housing having opposed, spaced parallel surfaces defining a fluid shear space therebetween and cooperable with a fluid medium in said shear space to provide a shear-type fluid drive from said plate to said housing; a single-groove pulley formed on said rear wall of said housing; first and second driven fan pulleys rotatably mounted on opposite sides of said front single-groove pulley and at different levels therewith; first and second fans secured to said first and second driven fan pulleys, respectively; an endless belt mounted around said single-groove pUlley and extending in opposite directions therefrom to and around each of said first and second driven fan pulleys and thence directly between said fan pulleys for rotating said fan pulleys at a constant speed ratio with respect to the speed of said housing and at a variable speed ratio with respect to the speed of said engine-rotated shaft; a multiple-groove idler pulley; a multiple-groove drive pulley directly secured to said engine-rotated drive shaft between the viscous fluid clutch and the engine and driven thereby; a plurality of engine accessory driven pulley; and a plurality of endless belts with one belt mounted around each of said engine accessory driven pulleys and some one groove of said multiple-groove drive pulley and some one groove of said multiple-groove idler pulley for rotating said engine accessory driven pulleys at a constant speed ratio with respect to the speed of said engine-rotated shaft.