Water-cooled remote fan drive

A 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, said water-cooled drive mechanism 81, 122 in fluid communication between said radiator 78, 108 and said engine block;
• a second fan drive pulley 87, 104 coupled to said water-cooled drive mechanism 81, 122;
• 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.

A water-cooled remote fan drive assembly 100 comprising:

• an engine crankshaft 128 coupled to an engine, said engine having an engine block;
• a radiator 108 in fluid communication with said engine block;
• a fan 114 mounted on said radiator 108;
• a transfer drive mechanism 116 coupled to said fan 114;
• a water-cooled drive mechanism 122 having a fan drive pulley 120, a clutch 136, a working chamber 140 defined between said fan drive pulley 120 and said clutch 136, a quantity of viscous fluid contained within said working chamber 140, and an impeller 138 contained within an impeller chamber 146 coupled to said clutch 136, said impeller chamber 140 in fluid communication with said radiator 108 and said engine block;
• a second fan drive pulley 104 coupled to said clutch 136;
• a crankshaft pulley 130 mounted to said engine crankshaft 128, said crankshaft pulley 130 having a first radius;
• a belt 132 rotatably coupled to said crankshaft pulley 130 and said fan drive pulley 120;
• an auxiliary pulley 102 coupled to said transfer drive mechanism 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 114 relative to engine speed;
• end
• a second belt 126 rotatably coupled to said auxiliary pulley 102 and said second fan drive pulley 104;
• wherein said second fan pulley 104 is bearing 118 mounted to a shroud 106 of said radiator 108 and coupled to said clutch 136 via a second transfer drive mechanism 124 and wherein said auxiliary pulley 102 is bearing mounted on said shroud 106.

A remote fan drive assembly 100 comprising:

• an engine crankshaft 128 coupled to an engine, said engine having an engine block;
• a radiator 108 in fluid communication with said engine block;
• a fan 114 mounted on said radiator 108;
• a transfer drive mechanism 116 coupled to said fan 114;
• a water-cooled drive mechanism 122 having a fan drive pulley 120, said water-cooled drive mechanism 122 in fluid communication between said radiator 108 and said engine block;
• a second fan drive pulley 104 coupled to said water-cooled drive mechanism 122;
• a crankshaft pulley 130 mounted to said engine crankshaft 128, said crankshaft pulley 130 having a first radius;
• a belt 132 rotatably coupled to said crankshaft pulley 130 and said fan drive pulley 120;
• an auxiliary pulley 102 coupled to said transfer drive mechanism 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 114 relative to engine speed;
• and
• a second belt 126 rotatably coupled to said auxiliary pulley 102 and said second fan drive pulley 104;
• wherein said second fan drive pulley 104 is coupled to said water-cooled drive mechanism 122 using a second transfer drive mechanism 124 and wherein said second fan pulley 104 is bearing mounted to a shroud 106 of said radiator 108 and coupled to said clutch 136 via a second transfer drive mechanism 124 and wherein said auxiliary pulley 102 is bearing mounted on said shroud 106.