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A magneto-rheological fluid damper includes a damper body having a reservoir for a magneto-rheological fluid, a piston rod, a piston rod guide disposed within the damper body, where the piston rod guide has a passage therein for receiving the piston rod. The magneto-rheological fluid damper further

A magneto-rheological fluid damper includes a damper body having a reservoir for a magneto-rheological fluid, a piston rod, a piston rod guide disposed within the damper body, where the piston rod guide has a passage therein for receiving the piston rod. The magneto-rheological fluid damper further includes at least a first piston rod seal and at least a second piston rod seal arranged to seal between the piston rod guide and the piston rod. The magneto-rheological fluid damper further includes a fluid chamber defined between the piston rod guide and the piston rod, the fluid chamber being in communication with the reservoir. The magneto-rheological fluid damper further includes a piston rod guide filter arranged in a communication path between the fluid chamber and the reservoir to filter particulates out of the magneto-rheological fluid entering the fluid chamber. The magneto-rheological fluid damper further includes an accumulator arranged between the piston rod guide and the damper body.

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1. A magneto-rheological damper, comprising: a damper body having a reservoir for a magneto-rheological fluid;a piston rod;a piston rod guide disposed within the damper body, the piston rod guide having a passage therein for receiving the piston rod;at least a first piston rod seal and at least a se

1. A magneto-rheological damper, comprising: a damper body having a reservoir for a magneto-rheological fluid;a piston rod;a piston rod guide disposed within the damper body, the piston rod guide having a passage therein for receiving the piston rod;at least a first piston rod seal and at least a second piston rod seal arranged to seal between the piston rod guide and the piston rod;a fluid chamber defined between the piston rod guide and the piston rod, the fluid chamber being in communication with the reservoir;a piston rod guide filter arranged in a communication path between the fluid chamber and the reservoir to filter particulates out of the magneto-rheological fluid entering the fluid chamber, wherein the piston rod guide filter includes a magnetic field generator; andan accumulator arranged between the piston rod guide and the damper body. 2. The magneto-rheological damper of claim 1, further comprising a piston rod bearing assembly coupled to the piston rod guide and arranged to engage and support reciprocal motion of the piston rod. 3. The magneto-rheological damper of claim 1, wherein the accumulator comprises a diaphragm. 4. The magneto-rheological damper of claim 1, wherein the accumulator comprises a gas charged piston. 5. The magneto-rheological damper of claim 1, wherein the magnetic field generator is a permanent magnet. 6. The magneto-rheological damper of claim 1, wherein the magnetic field generator is an electromagnetic coil. 7. The magneto-rheological damper of claim 1, wherein the piston rod guide filter includes a fluid conduit in communication with the reservoir. 8. The magneto-rheological damper of claim 7, wherein the filtering media is disposed in the fluid conduit. 9. The magneto-rheological damper of claim 1, wherein the fluid chamber is defined between the at least first and second piston rod seals. 10. A magneto-rheological damper, comprising: a damper body having a reservoir for a magneto-rheological fluid;a piston rod;a piston rod guide disposed within the damper body, the piston rod guide having a passage therein for receiving the piston rod;a piston rod bearing assembly coupled to the piston rod guide and arranged to engage and support reciprocal motion of the piston rod;at least a first piston rod seal and at least a second piston rod seal arranged to seal between the piston rod guide and the piston rod;a fluid chamber defined between the piston rod guide and the piston rod, the fluid chamber being in communication with the reservoir;a piston rod guide filter defining a means for filtering fluid entering the fluid chamber, wherein the piston rod guide filter includes a magnetic field generator; andan accumulator arranged between the piston rod guide and the damper body. 11. The magneto-rheological damper of claim 10, wherein the accumulator comprises a diaphragm. 12. The magneto-rheological damper of claim 10, wherein the accumulator comprises a gas charged piston. 13. The magneto-rheological damper of claim 10, wherein the magnetic field generator is a permanent magnet. 14. The magneto-rheological damper of claim 10, wherein the magnetic field generator is an electromagnetic coil. 15. The magneto-rheological damper of claim 10, wherein the piston rod guide filter includes a fluid conduit in communication with the reservoir. 16. The magneto-rheological damper of claim 15, wherein the filtering media is disposed in the fluid conduit. 17. A method of controlling motion, said method including: providing a magneto-rheological fluid;providing a damper body having a reservoir for containing the magneto-rheological fluid;providing a piston rod;providing a piston rod guide disposed within the damper body, the piston rod guide having a passage therein for receiving the piston rod;providing a piston rod assembly coupled to the piston rod guide and arranged to engage and support reciprocal motion of the piston rod;providing at least a first piston rod seal and at least a second piston rod seal arranged to seal between the piston rod guide and the piston rod;providing a fluid chamber defined between the piston rod guide and the piston rod;providing a piston rod guide filter arranged in a communication path between the fluid chamber and the reservoir to filter particulates out of fluid entering the fluid chamber, wherein the piston rod guide filter includes a magnetic field generator; andproviding an accumulator arranged between the piston rod guide and the damper body. 18. A magneto-rheological damper, comprising: a damper body;a piston rod guide disposed within the damper body, the piston rod guide having a passage therein for receiving a piston rod;a piston rod bearing assembly disposed in the piston rod guide to engage with and support reciprocal motion of the piston rod;at least a first piston rod seal and at least a second piston rod seal arranged to seal between the piston rod guide and the piston rod;a lubrication chamber defined between the piston rod guide and the piston rod;a piston rod guide filter, said piston rod guide filter filtering fluid entering the lubrication chamber, wherein said piston rod guide filter includes a magnetic field generator; anda piston rod guide gas charged accumulator, said piston rod guide gas charged accumulator arranged between the piston rod and the damper body. 19. The magneto-rheological damper of claim 18, wherein the accumulator comprises a diaphragm. 20. The magneto-rheological damper of claim 18, wherein the accumulator comprises an accumulator piston. 21. A land vehicle suspension system fluid damper, comprising: a damper body;a piston rod guide disposed within the damper body, the piston rod guide having a passage therein for receiving a piston rod;a piston rod bearing assembly disposed in the piston rod guide to engage with and support reciprocal motion of the piston rod;at least a first piston rod seal and at least a second piston rod seal arranged to seal between the piston rod guide and the piston rod;a lubrication chamber defined between the piston rod guide and the piston rod;a piston rod guide gas charged accumulator, said piston rod guide gas charged accumulator arranged between the piston rod and the damper body; anda piston rod guide filter, said piston rod guide filter filtering a plurality of particles entering the lubrication chamber wherein said piston rod guide filter includes a magnetic field generator. 22. The damper of claim 21, wherein the damper includes a magneto-rheological fluid reservoir with a magneto-rheological damper fluid with a plurality of magnetic fluid particles and a filter, said filter filtering said magnetic fluid particles entering the lubrication chamber.