Electronically controlled fluid coupling device with fluid scavenge control and slip speed sensor
First Claim
Patent Images
1. An electronically controlled viscous fluid coupling assembly for a fan member comprising:
- (a) an output member configured for attachment to a fan member;
(b) an input member bearing mounted to said output member and rotatable around said output member and at input speed, said input member comprising a body member and a cover member;
(c) a stationary mounting member bearing coupled to said input member;
(d) a viscous fluid supply mechanism positioned within said input member and comprising a rotor member, a reservoir plate member having a fluid aperature, a fluid reservoir, a fluid chamber, a working chamber and a quantity of viscous fluid;
(e) an electromagnetic member mounted on said stationary mounting member;
(f) an electromagnetically actuated valve mechanism for controlling viscous fluid engagement of said output member with said input member, said valve mechanism having a moveable member for opening, partially opening and covering said fluid aperature responsive to a magnetic field generated by said electromagnetic member; and
(g) a differential speed sensor mechanism for determining the rotational speed of said output member, said differential speed sensor mechanism comprising a magnetic sensing device coupled to said stationary mounting member, a pole member attached to said input member, and a multi-pole ring magnet member;
wherein the differential speed of the input member and output member is determined by the difference in speed between said pole member and said ring magnet member; and
wherein the operation and the speed of a fan member is controlled by said viscous fluid coupling assembly without a wire tether member.
1 Assignment
0 Petitions
Accused Products
Abstract
A viscous fan drive with a front-mounted fan and electrical actuation without a tethered harness. The mechanical package includes an inverted viscous clutch, a drive pulley and a split electromagnetic actuator with the electrical portion mounted to a stationary mounting member. An integrated slip speed sensor is provided in order to determine the output speed.
-
Citations
8 Claims
-
1. An electronically controlled viscous fluid coupling assembly for a fan member comprising:
-
(a) an output member configured for attachment to a fan member; (b) an input member bearing mounted to said output member and rotatable around said output member and at input speed, said input member comprising a body member and a cover member; (c) a stationary mounting member bearing coupled to said input member; (d) a viscous fluid supply mechanism positioned within said input member and comprising a rotor member, a reservoir plate member having a fluid aperature, a fluid reservoir, a fluid chamber, a working chamber and a quantity of viscous fluid; (e) an electromagnetic member mounted on said stationary mounting member; (f) an electromagnetically actuated valve mechanism for controlling viscous fluid engagement of said output member with said input member, said valve mechanism having a moveable member for opening, partially opening and covering said fluid aperature responsive to a magnetic field generated by said electromagnetic member; and (g) a differential speed sensor mechanism for determining the rotational speed of said output member, said differential speed sensor mechanism comprising a magnetic sensing device coupled to said stationary mounting member, a pole member attached to said input member, and a multi-pole ring magnet member; wherein the differential speed of the input member and output member is determined by the difference in speed between said pole member and said ring magnet member; and wherein the operation and the speed of a fan member is controlled by said viscous fluid coupling assembly without a wire tether member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
Specification