Abstract:
A manual adjustment assembly for adjusting the height of a vehicle seat includes mounting brackets for supporting a seat bottom that is movable between a lowered position and a raised position. Separate adjustment assemblies can be installed at the front and rear portions of the seat for adjusting the height of the front portion independently from the rear portion. Or, a single adjustment assembly can be used to adjust the height of either the front or rear portion where the adjustment assembly includes a connecting linkage assembly to correspondingly adjust the height of the other portion of the seat bottom. The adjustment assembly includes a torque tube extends between the mounting brackets and is actuated by an actuator that selectively supplies rotational input to the torque tube. A drive link is supported on one end of the torque tube and is fixed for rotation with the torque tube as the tube receives input from the actuator. The adjustment assembly also includes a spring that operates with the torque tube and the drive link to assist movement of the seat member from the lowered position to the raised position when actuated by the actuator.
Abstract:
A system for controlling multiple vehicle includes a twelve volt (12V)/forty-two volt (42V) battery power distribution system that provides direct current. The system converts single phase alternating current to multiple phase alternating current to simultaneously power multiple vehicle systems. A single pulse width modulation generator converts the direct current from the 12V/42V battery power distribution system to alternating current. This provides one power supply path of alternating current, which has a first phase. A splitter device splits the one power supply path of alternating current into three power paths. A lead/lag circuit is used to shift the alternating current of the second path to a second phase different than the first phase of the first power supply path. A second lead/lag circuit for shifts the alternating current of the third path to a third phase different than the first phase or the second phase. This creates a three-phase alternating current power from a single direct current source. The three-phase alternating current is used to power a plurality of induction motors that operate multiple vehicle systems.
Abstract:
A vehicle seat assembly includes a seat back that is supported with respect to a seat bottom. The seat bottom is supported on a track assembly that includes a seat adjuster for controlling movement of the seat back and bottom. The seat adjuster can move the seat in horizontal and/or vertical directions and can also be used to adjust the tilt of the seat. An electric motor is used to drive the seat adjuster. The motor supports a first connector and the seat adjuster supports a second connector. A flexible shaft is used to interconnect the first and second connectors to transmit power from the motor to the adjuster. The shaft has a first end and a second end with each of the ends defined by a helical body portion. The first connector and the first end are mated to interconnect the motor and the shaft and the second connector and the second end are mated to interconnect the seat adjuster and the shaft. The helical body portion of the first and second ends is twisted with respect to the first and second connectors such that there is a slight interference fit between the ends and the connectors. The use of the helical body to create the interference fit allows for easy assembly of the shaft to the motor and seat adjuster and is quiet in operation.
Abstract:
A vehicle seat assembly includes a seat back supported with respect to a seat bottom and is attached to the vehicle by a mounting assembly. The mounting assembly has an inboard track assembly and an outboard track assembly that are both mounted to a vehicle structure with the track assemblies being spaced apart from one another. Each track assembly includes a first track and a second track supported for movement relative to the first track. The first and second tracks are preferably mounted in a vertical configuration. The seat bottom is supported on the second track for horizontal movement with the second track as seat position is adjusted. A single drive mechanism is supported on one of the inboard or outboard track assemblies. The drive mechanism includes a single drive member that is mounted between the inboard and outboard track assemblies. A truss structure extends between the inboard and outboard track assemblies to provide structural support for the seat assembly as seat position is adjusted.
Abstract:
A system for controlling a displacement drive of a motor vehicle includes a manually operable actuator movable over a fixed stroke between a first end position and a second end position. The actuator is biased to a neutral position centrally located between the first and second end positions and provides a signal representative of position of the actuator. A controller receives the signal from the actuator and produces commands for a reversible DC electric motor of the displacement drive device. The commands vary speed of the drive motor based on the position of the actuator such that the speed of the drive motor is zero at the neutral position, increases in one direction as the actuator moves toward the first end position, and increases in the other direction as the actuator moves toward the second end position.
Abstract:
A plurality of motors for use in driving accessories on a vehicle, are each powered by three-phase current. A single controller controls the supply three-phase current to the plurality of motors. In another aspect of the invention, pseudothree-phase current is created from a direct current voltage source. A chopping circuit chops the voltage into a plurality of pulses, and a phase shift circuit then creates phase-shifted power signals from those pulses. The present invention thus enables the use of three-phase alternating current motors on a vehicle to drive accessories. This reduces the cost and size of the required motors.
Abstract:
A seat track assembly for an adjustable seat with positive engagement is disclosed and has a lower track assembly with at least one lower track having a plurality of spaced slots and an upper track assembly with at least one lower track. The upper track is slidable over the lower track. A latch is movable from a latching position securing the upper track with respect to the lower track to an unlatching position where the upper track is free to slide over the lower track. The latch comprises a plurality of locking pawls mounted on the upper track, with each locking pawl having a first tooth and a second tooth and each tooth has a front face and a rear face. In the latching position the first tooth of a first one of the locking pawls is received within a first slot and the second tooth of the first one of the locking pawls is received within a second slot. In accordance with certain preferred embodiments the width of each slot is twice the slot width, the pawls are separated from one another by a distance equivalent to the width of each tooth, the slots are separated by a distance generally equal to the width of each tooth.
Abstract:
A linkage assembly is used to vertically adjust the position of a seat. The linkage assembly includes a first link that is connected to a second link without the use of fasteners. The first link has a first mounting portion and the second link has a second mounting portion. The first mounting portion is deformed into engagement with the second mounting portion to rotatably connect the first link to the second link. In one embodiment, the first mounting portion is an extrusion that extends through an aperture in the second link. An end of the extrusion is deformed into engagement with the second link to form a lip to lock the first link to the second link and allow relative rotational movement between the first and second links while eliminating relative linear movement therebetween. In an alternative embodiment, portions of the first and second links are deformed into locking engagement.
Abstract:
A vehicle seat mounting assembly includes a locking device mounted on an upper track that moves relative to a lower track. The mounting device includes a plurality of locking pawls that engage one or more slots on the lower track so that the upper track, and the seat, are maintained in a fixed position relative to the lower track. The locking device includes a first release bracket for disengaging the locking device and adjusting the position of the seat. Activation of the first release bracket causes simultaneous movement of a seat position indicator. The seat position indicator remains stationary relative to the lower track in the event that a second release bracket is used to disengage the locking device. When the second release bracket is used, the position indicator serves to provide for automatic repositioning of the seat into its last position before activation of the second release lever. The locking device further includes a plurality of locking pawls that are dimensioned and spaced in a preselected order corresponding to dimensions and spacings of slots in the lower track so that at least one of the locking pawls engages at least one slot in the lower track at all times that the locking device is in a locking position.
Abstract:
A seat assembly includes a seat cushion and a seat back. The seat cushion has opposite front and rear ends. The seat cushion is selectively height adjustable relative to the floor of the vehicle. The seat back has nested outer and inner support members. The outer support member has an upper portion extending between spaced apart side bolsters. The inner support member is disposed between the side bolsters and below the upper portion of the outer support member. The inner support member is operatively coupled to the seat cushion for movement therewith relative to the outer support member. The inner support member remains below the upper portion of the outer support member to provide continuous support to the lower portion of the occupant's back during adjustment of the seat cushion relative to the floor of the vehicle.