Patent ID: 6439172
Filing Date: 2002-08-27
Classification: F01P

Abstract:
A water-cooled remote fan drive assembly 59, 100 comprising:an engine crankshaft 64, 128 coupled to an engine, said engine having an engine block; a radiator 78, 108 in fluid communication with said engine block; a fan 68, 114 mounted on said radiator 78, 108; a transfer drive mechanism 66, 116 coupled to said fan 68, 114; a water-cooled drive mechanism 81, 122 having a fan drive pulley 84, 120, a clutch 90, 136, a working chamber 88, 140 defined between said fan drive pulley 84, 120 and said clutch 90, 136, a quantity of viscous fluid contained within said working chamber 88, 140, and an impeller 98, 138 contained within an impeller chamber 91, 146 coupled to said clutch 90, 136, said impeller chamber 91, 140 in fluid communication with said radiator 78, 108 and said engine block; a second fan drive pulley 87, 104 coupled to said clutch 90, 136; a crankshaft pulley 80, 130 mounted to said engine crankshaft 64, 128, said crankshaft pulley 80, 130 having a first radius; a belt 82, 132 rotatably coupled to said crankshaft pulley 80, 130 and said fan drive pulley 84, 120; an auxiliary pulley 62, 102 coupled to said transfer drive mechanism 66, 116 having a second radius, wherein said first radius and said second radius are sized to create a second overdrive mechanism to provide a desired rotational speed of said fan 68, 114 relative to engine speed; and a second belt 88, 126 rotatably coupled to said auxiliary pulley 62, 102 and said second fan drive pulley 87, 104.