Abstract: A coiled filter for use in a hydraulic braking system of a vehicle comprises a coiled mesh-like structure which is configured to be installed around a first surface of a cylindrical hydraulic component. The coiled filter is configured to have an internal spring force as a retention force which couples the filter to the first surface of the cylindrical hydraulic component. The filter may be pre-coiled prior to installation by plastically deforming to a diameter that is smaller than the diameter of the cylindrical hydraulic component on which the filter is installed.

Abstract: A method for routing data packets in a network comprising, at a first node of the network, establishing communication with a plurality of neighbor nodes in the network, determining a destination node for a data packet, determining a path for routing the data packet from the first node to the destination node, wherein the path comprises one or more relay nodes for relaying the data packet from the first node to the destination node, the one or more relay nodes comprising a first neighbor node of the plurality of neighbor nodes for receiving the data packet from the first node, identifying among the one or more relay nodes and the destination node a second neighbor node of the plurality of neighbor nodes, and in accordance with the identification of the second neighbor node, transmitting the data packet to the second neighbor node.

Abstract: A method for routing data packets in a network comprising, at a first node of the network, establishing communication with a plurality of neighbor nodes in the network, determining a destination node for a data packet, determining a path for routing the data packet from the first node to the destination node, wherein the path comprises one or more relay nodes for relaying the data packet from the first node to the destination node, the one or more relay nodes comprising a first neighbor node of the plurality of neighbor nodes for receiving the data packet from the first node, identifying among the one or more relay nodes and the destination node a second neighbor node of the plurality of neighbor nodes, and in accordance with the identification of the second neighbor node, transmitting the data packet to the second neighbor node.

Abstract: A hydraulically operated actuator is provided for controlling a roll of a vehicle that includes an actuator connected between a first mass and a second mass of the vehicle. An upper mount assembly is coupled to the first mass and a lower mount assembly is coupled to the second mass. A high-pressure chamber is disposed between the lower mount assembly and the upper mount assembly. The high-pressure chamber has a variable volume of hydraulic fluid disposed therein for selectively restricting the movement between the upper mount assembly and the lower mount assembly. A low-pressure accumulator includes a portal for receiving hydraulic fluid from the high-pressure chamber.

Abstract: A vehicle control system includes a steering mechanism adapted to be operatively connected to associated wheels of a vehicle. A position sensor is operatively connected to the steering mechanism to generate a signal representative of a position of the steering mechanism. A filter device receives the steering position signal and generates a filtered output. The electronic control unit is operable to generate a control signal based at least in part upon the filtered steering position signal. A vehicle control subsystem is in communication with the electronic control unit and is responsive to the control signal. A vehicle system is controlled by monitoring the position of a steering mechanism of a vehicle, determining a rate of change of the position of the steering mechanism, filtering the rate of change, comparing the filtered rate of change to a threshold value, and controlling a vehicle system based upon the comparison.

Abstract: A system is disclosed for controlling the roll of a motor vehicle. The system comprises a selective lock connected between an unsprung portion of the vehicle and a sprung portion of the vehicle.

Abstract: A roll control actuator, a roll control system, and a roll control strategy for controlling the roll of a motor vehicle are disclosed. The actuator comprises a selective lock connected between an unsprung portion of the vehicle and a sprung portion of the vehicle. The system comprises such an actuator. The strategy comprises utilizing locking and unlocking thresholds to control the locked state of such an actuator.

Abstract: The present invention provides a proportional microvalve having a first, second and third layer, and having high aspect ratio geometries. The first layer defines a cavity with inlet and outlet ports. The second layer, doped to have a low resistivity and bonded between the first and third layers, defines a cavity having a flow area to permit fluid flow between the inlet and outlet ports. The second layer further defines an actuatable displaceable member, and one or more thermal actuators for actuating the displaceable member to a position between and including an open and a closed position to permit or occlude fluid flow. The third layer provides one wall of the cavity and provides electrical contacts for electrically heating the thermally expandable actuators. The thermal actuators and the displaceable member have high aspect ratios and are formed by deep reactive ion etching such that they are displaceable in the plane of the second layer while being very stiff out of the plane.

Abstract: A hydraulically operated actuator is provided for controlling a roll of a vehicle that includes an actuator connected between a first mass and a second mass of the vehicle. An upper mount assembly is coupled to the first mass and a lower mount assembly is coupled to the second mass. A high pressure chamber is disposed between the lower mount assembly and the upper mount assembly. The high pressure chamber has a variable volume of hydraulic fluid disposed therein for selectively restricting the movement between the upper mount assembly and the lower mount assembly. A low pressure accumulator includes a portal for receiving hydraulic fluid from the high pressure chamber. An anti-aeration assembly for minimizing gas bubbles from transitioning between the high pressure chamber and the accumulator, the anti-aeration assembly being disposed with the accumulator.

Abstract: A system is disclosed for controlling the roll of a motor vehicle. The system comprises a selective lock connected between an unsprung portion of the vehicle and a sprung portion of the vehicle.

Abstract: The present invention provides a proportional microvalve having a first, second and third layer, and having high aspect ratio geometries. The first layer defines a cavity with inlet and outlet ports. The second layer, doped to have a low resistivity and bonded between the first and third layers, defines a cavity having a flow area to permit fluid flow between the inlet and outlet ports. The second layer further defines an actuatable displaceable member, and one or more thermal actuators for actuating the displaceable member to a position between and including an open and a closed position to permit or occlude fluid flow. The third layer provides one wall of the cavity and provides electrical contacts for electrically heating the thermally expandable actuators. The thermal actuators and the displaceable member have high aspect ratios and are formed by deep reactive ion etching such that they are displaceable in the plane of the second layer while being very stiff out of the plane.

Abstract: Direct sensing of rough road conditions are used to modify operation of a wheel slip control system. At least one suspension sensor (139) senses an operating parameter of the suspension system. A road surface classifier is responsive to the suspension pension sensor (139) for generating a road surface signal representing a roughness of a road surface over which the vehicle travels. A braking system includes a wheel speed sensor and a brake actuator. An active braking control detector wheel slip in response to the wheel speed sensor (108) during at least one of braking or accelerating of the vehicle and modulates the brake actuator in response to the detected wheel slip. The active braking control is responsive to the road surface signal for modifying modulation f the brake actuator as a function of the road surface signal.

Abstract: A coupling having slots for receiving drive tabs of an associated driving shaft and a driven shaft, wherein the tabs of the driving shaft and the driven shaft are tapered to militate against rotational play between the driving shaft and the driven shaft which results in undesirable wear and damage to the drive shafts and coupling.

Abstract: A microvalve device for controlling fluid flow in a fluid circuit. The microvalve device comprises a body having a cavity formed therein. The body further has first and second pilot ports placed in fluid communication with the cavity. The body also has first and second primary ports placed in fluid communication with the cavity. Each port is adapted for connection with a designated fluid source. A pilot valve supported by the body is movably disposed in the cavity for opening and closing the first and second pilot ports. An actuator is operably coupled to the pilot valve for moving the pilot valve. A microvalve is positioned by the fluid controlled by the pilot valve. The microvalve is a slider valve having a first end and a second end. The slider valve is movably disposed in the cavity for movement between a first position and a second position. The first end of the slider valve is in fluid communication with the first and second pilot ports when the first and second pilot ports are open.

Abstract: A coupling having slots for receiving drive tabs of an associated driving shaft and a driven shaft, wherein the tabs of the driving shaft and the driven shaft are tapered to militate against rotational play between the driving shaft and the driven shaft which results in undesirable wear and damage to the drive shafts and coupling.

Abstract: A coupling having slots for receiving drive tabs of an associated driving shaft and a driven shaft, wherein the tabs of the driving shaft and the driven shaft are tapered to militate against rotational play between the driving shaft and the driven shaft which results in undesirable wear and damage to the drive shafts and coupling.

Abstract: The present invention determines a longitudinal wheel speed of an individual wheel from an angular rate signal from a wheel rotation sensor. Vehicle suspension information or operating characteristics are input to a suspension system mathematical model to determine instantaneous rolling radius, taking into account changes in tire rolling radius resulting from vertical motion of the road surface. Improved accuracy of wheel speed permits less severe filtering of wheel speeds in detecting wheel slip and/or modified speed and acceleration thresholds in slip control.

Abstract: A piston pump comprises cylinder attached within a cavity of a pump housing. An outlet check valve seat is defined about an outlet of the cylinder. A piston is slidably received in a bore of the cylinder and has a first passageway formed therein. A cylinder head encloses the outlet of the cylinder and defines a second passageway therein. The first passageway has an inlet in fluid communication with the cavity of the pump housing, and an outlet in fluid communication with a pumping chamber defined in the pump housing. A first spring retains the piston to the cylinder. A first check valve member is a ball retained near a valve seat formed in the first passageway of the piston by a disk spring, and allows fluid to flow only from the inlet to the outlet of the piston.

Abstract: The present invention provides a proportional microvalve having a first, second and third layer, and having high aspect ratio geometries. The first layer defines a cavity with inlet and outlet ports. The second layer, doped to have a low resistivity and bonded between the first and third layers, defines a cavity having a flow area to permit fluid flow between the inlet and outlet ports. The second layer further defines an actuatable displaceable member, and one or more thermal actuators for actuating the displaceable member to a position between and including an open and a closed position to permit or occlude fluid flow. The third layer provides one wall of the cavity and provides electrical contacts for electrically heating the thermally expandable actuators. The thermal actuators and the displaceable member have high aspect ratios and are formed by deep reactive ion etching such that they are displaceable in the plane of the second layer while being very stiff out of the plane.

Abstract: The present invention determines a longitudinal wheel speed of an individual wheel from an angular rate signal from a wheel rotation sensor. Vehicle suspension information or operating characteristics are input to a suspension system mathematical model to determine instantaneous tolling radius, taking into account changes in tire rolling radius resulting from vertical motion of the road surface. Improved accuracy of wheel speed permits less severe filtering of wheel speeds in detecting wheel slip and/or modified speed and acceleration thresholds in slip control.