725 results about "Front-wheel drive" patented technology

A brake apparatus for a vehicle generally sets an upper limit value of regenerative braking force to the maximum value of the regenerative braking force which can be generated at the present. In the case of a front-wheel-drive vehicle, the total braking force, the sum of front-wheel braking force (front-wheel hydraulic braking force+regenerative braking force) and rear-wheel braking force (rear-wheel hydraulic braking force), is rendered coincident with a target braking force corresponding to a brake pedal depressing force, and the regenerative braking force is set to a largest possible value equal to or less than the upper limit value. As a result, the regenerative braking force can be larger than front-wheel-side target distribution braking force. The upper limit value is decreased from the maximum value by an amount corresponding to the degree of easiness of occurrence of a locking tendency at the driven wheels (front wheels).

A three-wheeled vehicle having two parts that can be tilted around a longitudinal axis. A rear part has a chassis for two-track wheels and the front part, which can be tilted relative to the rear part, accommodates a driver seat. Connected to a front end of the front part is a tiltable front wheel suspension to which a front wheel and an engine and gears for the front-wheel drive are attached. The two vehicle parts that can be tilted relative to each other each support or form a body which can also be designed for the front part as a monocoque and forms a closed and heatable driver cabin.

A two-wheel-drive sport all-terrain vehicle (ATV) has a front drive geometry in which the scrub radius is zero or negative combined with a low king pin axis angle, which desirably reduces both steering kickback and lateral pull during braking. The scrub radius less than or equal to zero can be achieved by outwardly displacing the king pin axis, which is defined by the upper and lower pivotal joints of the upper and lower A-arms of the front suspension. To displace the king pin axis outwardly, the disk brake and associated caliper are inverted. The disk brake is supported by support arms extending inwardly from the wheel hub. The disk brake includes an aperture to accommodate both the lower pivotal joint, which protrudes through the plane of the disk, and the inverted caliper. The front suspension further includes a knuckle pivotally connected to the A-arms and an integral aluminum spindle. For further compactness, the wheel hub includes angular-contact bearings.

A lawn mower having selectively drivable wheels, includes dirigible front drive wheels, a pair of right and left rear drive wheels, a body frame, an engine supported by the body frame, a mower unit vertically movably supported by the body frame forwardly of the rear drive wheels, a change speed device for changing a speed of drive from the engine, a front wheel driving device for transmitting drive from the change speed device to the front wheels, a left rear wheel driving device for transmitting drive from the change speed device to a right axle of the left rear wheel, a right rear wheel driving device for transmitting drive from the change speed device to a left axle of the left rear wheel, and rear wheel clutches associated with the left rear wheel driving device and the right rear wheel driving device, respectively, for selectively connecting and disconnecting drive. The rear wheel clutches are operable by an interlocking mechanism in response to a displacement to the front drive wheels from a straight running posture, to disconnect drive transmission to one of the rear drive wheels moving along an inner track of turning of the vehicle body. The interlocking mechanism has a link mechanism operatively connecting a steering mechanism for steering the front drive wheels to each of the rear wheel clutches, and extending over the mower unit.

In a fuel cell equipped vehicle (10), hydrogen cylinders (18) storing hydrogen gas to be supplied to a fuel cell battery (30), a fuel cell (30), fuel cell accessories (31), a storage battery (40), and a PCU (50) that controls the supply of electric power from the fuel cell (30) and the storage battery (40) to a front wheels-driving electric motor (14) and a rear wheels-driving electric motor (16) are arranged in that order under a floor of a passenger compartment (R1). Therefore, these major component devices do not reduce the spaces of a passenger compartment (R1), a forward compartment (R2), and a rearward compartment (R3). Since the component devices disposed under the floor of the passenger compartment (R1) have relatively great weights, the center of gravity of the vehicle comes to a low position in a central portion of the vehicle, thus achieving good running stability of the vehicle.

Described is a battery powered, four-wheel, all-terrain vehicle, with independently operable, variable speed, bi-directional electric motors, one of which may selectively used to drive the front wheels of the vehicle, the other of which may be selectively used to drive the rear wheels of the vehicle. A front differential drive mechanism allows the front wheels to operate at different speeds. Front wheels of the vehicle are steerable through universal joints disposed between the front differential mechanism and each front wheel. A rear differential drive mechanism allow the rear wheels to rotate at different speeds. By selectively choosing whether to engage front and rear wheels and the direction they rotate, the vehicle may be operated as a four-wheel drive vehicle, a front-wheel drive vehicle, a rear wheel drive vehicle, with all four wheels disengaged, or even with front and rear wheels rotating in opposite directions.

A LSG four wheel drive hybrid vehicle drive mechanism with its front wheel drive adopts engine and crankshaft installed disk generator, automatic clutch and manual transmission MT or directly using AMT automatic transmission to form the drive system, with the ISG generator installed on the engine and the automatic clutch or AMT automatic transmission, with the rear wheel drive using rear wheel drive generator, rear wheel drive decelerator and differential formed electric rear axle. The overall drive scheme is simple, effective, low in cost, easy for realization, with relatively ideal vehicle matching and control effect.

A deck assembly for a self-propelled, walk-behind rotary lawn rotary mower is provided. The deck assembly is configurable for either front or rear wheel drive and includes a deck defining a cutting chamber which may house a cutting member. The cutting chamber is bound at least in part by a rear enclosure member. The deck assembly also includes a side discharge port having a side discharge port door. A rear discharge port located on a rear portion of the deck is also provided. Preferably, a duct of substantially rectangular cross section extends through the rear enclosure member between the cutting chamber and the rear discharge port. In one embodiment, the duct has a first, uppermost surface and a second, lowermost surface, wherein the first, uppermost surface and the second, lowermost surface both form substantially horizontal planes.

Drifting karts in accordance with embodiments of the invention are described that include a front wheel drive train and rear caster wheels that can be dynamically engaged to induce and control drift during a turn. One embodiment of the invention includes a chassis to which a steering column is mounted, where the steering column includes at least one front steerable wheel configured to be driven by an electric motor, a battery housing mounted to the chassis, where the battery housing contains a controller and at least one battery, wiring configured to provide power from the at least one battery to the electric motor, two caster wheels mounted to the chassis, where each caster wheel is configured to rotate around a rotational axis and swivel around a swivel axis, and a hand lever configured to dynamically engage the caster wheels to induce and control drift during a turn.

An auxiliary electric drive assembly includes an alternating current induction motor, planetary speed reduction gearing and a differential. The differential may be either active or passive. The auxiliary drive system is utilized as the front axle in a rear wheel drive vehicle and the rear axle in a front wheel drive vehicle. Elimination of many of the components in a conventional four wheel drive system such as the transfer case and hybrid gears improves the overall efficiency and fuel economy of a vehicle so equipped.

A strategy is provided using feedback control algorithms to monitor and dynamically modify front and rear braking torque to maintain controllability in a vehicle that initially favors regenerative braking. Simple proportional-integral-derivative feedback controllers can be used. The controller can monitor wheel speed, lateral acceleration, yaw rate, and brake position to selectively activate non-regenerative braking independently for each individual wheel and regenerative braking in varying proportion based on at least one actual vehicle controllability value and at least one predetermined target value for controllability and optimization of energy recovery. Controllability factors can include predetermined longitudinal slip ratio, comparison of tire slip angle or yaw rate. For rear wheel drive configurations, the non-regenerative brakes can be applied to just one front axle wheel on the outside of a turn. For front wheel drive configurations, the non-regenerative brakes can be applied to just one rear axle wheel on the inside of a turn.

The present invention is a fully functioning two-wheel drive bicycle with a shock-absorbing front fork. The drive train which supplies power to the front wheel is incorporated into a modified frame and comprises a rear wheel driven by the traditional chain or shaft mechanism and the front wheel driven by a series of rigid shafts transferring power from the driven rear wheel to the front wheel. The drive train lengthens and shortens in parallel with the shock-absorbing front fork.

In a double clutch transmission, particularly for front wheel drive cars with transversely mounted engines, the power path for the reverse speed extends through the same path as that for the second forward speed, both using the same input clutch, while the power path for the first forward speed extends through the other input clutch of the double clutch so that shifting between the reverse and first speeds can be accomplished under engine power.

A vehicle has a rear wheel drive device for driving rear wheels independently of a front wheel drive device. A drive mode control unit performs at least one of a first switching operation for switching between a front-wheel-only-drive mode and a rear-wheel-only-drive mode, a second switching operation for switching between a composite drive mode and the rear-wheel-only-drive mode, and a third switching operation for switching between the composite drive mode and the front-wheel-only-drive mode. When the drive mode control unit performs any one of the first switching operation, the second switching operation, and the third switching operation, an assistive force controller of the steering apparatus changes a control process for controlling a steering assistive force.

The invention discloses a coal mine underground search-and-rescue detection robot moving device, belonging to the technical field of robots. The device comprises walking track mechanisms on the left and right sides, a front swing arm track mechanism, a wheel swing arm connecting rod mechanism, a wheel chassis and a power device. The front swing arm track mechanism is mounted on the outer side of the walking track mechanism; and the wheel swing arm connecting rod mechanism is mounted on the outer side of the front swing arm track mechanism. In both moving modes, the steering is realized by thedifferential speed between the left and right wheels, the wheel walking is driven by double rear wheels, and the track walking is driven by double front wheels. In the wheel swing arm connecting rod mechanism, a wheel lifting motor drives a rear wheel swing arm box to rotate, and the movement is transferred to a front wheel swing arm sleeved on a front mandrel through a transmission connecting rod; in the case of special underground environment of the coal mine, the track or wheel running can be selected according to different road conditions; and the device disclosed by the invention has perfect moving ability and adaptability, and provides a moving platform with strong maneuverability and reliability for building a coal mine underground environment detection robot.

Described is a battery powered, four-wheel, all-terrain vehicle, with independently operable, variable speed, bi-directional electric motors, one of which may selectively used to drive the front wheels of the vehicle, the other of which may be selectively used to drive the rear wheels of the vehicle. A front differential drive mechanism allows the front wheels to operate at different speeds. Front wheels of the vehicle are steerable through universal joints disposed between the front differential mechanism and each front wheel. A rear differential drive mechanism allow the rear wheels to rotate at different speeds. By selectively choosing whether to engage front and rear wheels and the direction they rotate, the vehicle may be operated as a four-wheel drive vehicle, a front-wheel drive vehicle, a rear wheel drive vehicle, with all four wheels disengaged, or even with front and rear wheels rotating in opposite directions.

The present invention relates to a multi-functional fitness bicycle, comprising front and rear wheels, a saddle, a frame and hand-and-foot drive system; the hand-and-foot drive system includes at least one pedal, and a foot drive chainwheel, the foot drive chainwheel being coupled with the pedal via a pedal crank; the hand-and-foot drive system further comprises a front wheel drive system including a hand drive gear, which is driven by a rocker arm integrated with a front fork; the front driving rocker arm is pivoted to the front driving axle seat and drives the front wheel; characterized in that the bicycle further comprises an inertial energy storage wheel for adjusting resistance automatically and a variable-resistance control system, which automatically adjusts kinetic resistance of the inertial energy storage wheel when the bicycle is driven. The multi-functional fitness bicycle of the present invention can be ridden at a small space, and the exerciser can perform exercises smoothly when he/she selects bigger kinetic resistance.

A method of controlling the speed of a right front wheel and a left front wheel on a work machine includes receiving a speed command based at least partially on an operator input and monitoring at least one wheel steering angle of at least one front wheel. A first front wheel speed command may be determined based at least partially on the at least one wheel steering angle. In addition, a second front wheel speed command may be determined based at least partially on the at least one wheel steering angle. The first front wheel speed command and the second front wheel speed command may be output to independently control the speed of the right and the left front wheels.

The invention discloses a chassis power transmission system structure of a hybrid four-wheel vehicle, which consists of an engine, a differential mechanism, a storage battery pack, a motor controller, hub motors, a frame structure, a wire harness, wheels and the like. Two hub motors form a rear wheel driving system; a micro engine and a differential assembly form a front wheel driving system; and power switching is realized through the match of an oil-electricity conversion controller and a gear shifter. The chassis power transmission system of the four-wheel vehicle driven by oil-electricity hybrid power has the advantages of simple structure, convenient manufacture and low cost, and is applicable to a micro hybrid vehicle.

A driving-force transmitting device includes a first disengaging mechanism that disengages a driving force from an engine to a driving-force transmitting unit and a second disengaging mechanism having a synchronizing mechanism that disengages the driving force from a driving-force transmitting unit to a right-rear-wheel driving shaft. A change gear ratio between front wheels and rear wheels is constructed so that a driving-force transmitting unit side of the first disengaging mechanism rotates at a speed higher than that of an opposing side at the time of completion of synchronization of the second disengaging mechanism. In switching from a two-wheel drive mode to a four-wheel drive mode, synchronization of the second disengaging mechanism first starts to increase the rotation speed of the driving-force transmitting unit, and next connects the first disengaging mechanism when a rotation speed of the driving-force transmitting unit side of the first disengaging mechanism matches that of an opposing side.