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386 results about "Two-wheel drive" patented technology
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Two-wheel drive (2WD) describes vehicles with a drivetrain that allows two wheels to receive power from the engine simultaneously.
Hybrid motor vehicle driveline
A hybrid motor vehicle (10) has a four wheel drive arrangement in which the front wheels (12 and 13) are driven by the engine (11) in two wheel drive mode and all four wheels (12-15) in four wheel drive mode. The engine is connected to the rear wheels (14 and 15) through an auxiliary driveline which includes a first clutch (22) to connect to the engine (11), a propshaft (23) and a differential (25). An electric motor (28) is connected to the propshaft (23) for the purpose of driving the vehicle either with or without the assistance of the engine (11). A second clutch (27) is located between the propshaft (23) and the differential (25). When the vehicle is in two wheel drive mode, the propshaft (23) is disconnected from both the engine (11) and the rear wheels (14 and 15) and on switching to four wheel drive mode when the vehicle is moving the propshaft (23) is firstly spun up to a speed matching that of the engine (11) and rear wheels (14, 15) by the action of the electric motor (28). Then the auxiliary driveline (21) is reconnected by engaging the first and second clutches (22, 27). This reduces any acceleration jerk perceived by the driver.
Owner:FORD GLOBAL TECH LLC
Transfer case with synchronizer clutch
InactiveUS6814682B2Mechanical actuated clutchesMagnetically actuated clutchesTransfer caseDrive shaft
A transfer case for a vehicle that allows shifting between AWD and two-wheel drive at any vehicle speed. The transfer case includes a center differential employing pinion and sun gears that allow a front drive shaft and a rear drive shaft to turn at different speeds to provide the all-wheel drive function. The transfer case further includes an electrically actuated synchronizer assembly that allows the speed of the front drive shaft to be synchronized to the speed of the rear drive shaft when shifting from two-wheel drive to all-wheel drive to provide the shift on the fly function. The synchronizer assembly also includes a neutral position where both the front drive shaft and the rear drive shaft are not engaged to the vehicle transmission to allow for vehicle towing.
Owner:BORGWARNER INC
Driving-force transmitting apparatus for four-wheel-drive vehicle
InactiveUS20100274456A1Deterioration in fuel efficiency can be preventedFuel efficiencyManual control with multiple controlled membersDigital data processing detailsFriction torqueDrag torque
A transmitting apparatus includes a disengaging device that disengages a driving force from a front-wheel differential device to a first driving-force transmitting direction converting unit 20 and a multi-plate clutch mechanism provided between an output of a rear-wheel differential device and a right-rear wheel and capable of successively adjusting a fastening force. Drag torque when the fastening of the multi-plate clutch mechanism is released is set smaller than friction torque of a rear-wheel drive system between the first driving-force transmitting direction converting unit and a second driving-force transmitting direction converting unit. A controller unconnects the disengaging device and releases the fastening of multi-plate clutch mechanism when switching to a two-wheel drive mode, thereby stopping the rotation of the rear-wheel drive system.
Owner:UNIVANCE CORP
Transmission and cooling arrangement for all terrain vehicle
InactiveUS6454040B1Wheel based transmissionFrictional rollers based transmissionDrive shaftCrankcase
An all terrain vehicle has a lubrication system that draws from an oil pan and lubricates the main bearings and the piston. A drive shaft for the vehicle is positioned outside of the oil pan such that the oil pan's lateral dimension may be decreased. Additionally, a lubricant pump pickup is located within a recess in the bottom of the oil pan such that the pick-up is at about the same vertical height as the lower surface of the crankcase. The vehicle is also shiftable from two-wheel drive to four-wheel drive. The shifting mechanism is located within the crankcase or transmission case. A locking collar selectively engages or disengages two of the four wheels from the output.
Owner:YAMAHA MOTOR CO LTD
Transfer case with synchronizer clutch
InactiveUS20030211913A1Mechanical actuated clutchesMagnetically actuated clutchesTransfer caseDrive shaft
A transfer case for a vehicle that allows shifting between AWD and two-wheel drive at any vehicle speed. The transfer case includes a center differential employing pinion and sun gears that allow a front drive shaft and a rear drive shaft to turn at different speeds to provide the all-wheel drive function. The transfer case further includes an electrically actuated synchronizer assembly that allows the speed of the front drive shaft to be synchronized to the speed of the rear drive shaft when shifting from two-wheel drive to all-wheel drive to provide the shift on the fly function. The synchronizer assembly also includes a neutral position where both the front drive shaft and the rear drive shaft are not engaged to the vehicle transmission to allow for vehicle towing.
Owner:BORGWARNER INC
Hybrid Vehicle and Control Method Thereof
ActiveUS20090024262A1Reduce power consumptionReduced areaHybrid vehiclesDigital data processing detailsHybrid vehicleDriving mode
A hybrid vehicle is provided with means for setting a four-wheel drive condition which is a condition for switching from two-wheel drive to four-wheel drive, and an EV switch which, when turned on by an occupant of the vehicle, places the vehicle in an EV driving mode in which only an electric motor is used as the power source. The four-wheel drive condition setting means changes the four-wheel drive condition to reduce a region in which the vehicle operates in four-wheel drive when the EV switch is on as compared to when the EV switch is off. As a result, the vehicle operates in two-wheel drive more frequently, thus reducing power consumption.
Owner:TOYOTA JIDOSHA KK
Two wheel drive bicycle with a shock-absorbing front fork
InactiveUS6182991B1Guaranteed safe operationEasy to operateGearingAxle suspensionsVehicle frameEngineering
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.
Owner:CHRISTINI TECH
Parallel manual transmission for four-wheel drive and parallel manual transmission for transverse installation in a front-wheel drive vehicle
InactiveUS7040186B2Selectability is easilyReliable tractionToothed gearingsTransmission elementsEngineeringFront-wheel drive
A parallel manual transmission for a four-wheel drive is provided and includes two input shafts, each of which can be non-rotatably coupled via its own clutch to a shaft that is powered by a drive engine.
Owner:LUK LAMELLEN & KUPPLUNGSBAU BETEILIGUNGS KG
Driving force transmitting device for four-wheel drive vehicle
InactiveUS20090229905A1Decreases oil viscosity resistanceDecreases friction lossFluid actuated clutchesRoad transportFriction torqueDrag torque
A driving force transmission device for four-wheel-drive vehicle based on the two-wheel drive of front wheels is provided. In the case of the two-wheel drive of front wheels, a multi-disc clutch mechanism for controlling the driving force distribution to a rear wheel output shaft, and a disconnection / connection mechanism for disconnecting and connecting a rear wheel differential and a right rear wheel drive shaft are provided, and in the two-wheel drive of front wheels, the dragging torque of the multi-disc clutch mechanism is made smaller than the friction torque of a rear wheel driving force transmission section, and the front wheel differential and the right rear wheel drive shaft are disconnected by the disconnection / connection mechanism, thereby the rotation of the rear wheel driving force transmission section is stopped.
Owner:UNIVANCE CORP
Two-wheel drive two-wheeled vehicle
InactiveUS8056693B2Keep full controlIncreased traction and mobilityMechanical actuated clutchesRotary transmissionsEngineeringFront-wheel drive
A two-wheel drive motorcycle having a drive train that supplies power to the front wheel and includes a series of rigid shafts or other internalized drive systems. The front wheel drive consists of components located on the axis of steering within the head tube and positioned symmetrically in a counterbalancing fashion within the front fork in order to counteract the torque reactions from the rotating front wheel drive while providing a full range of steering. The front wheel drive lengthens and shortens in parallel with the shock-absorbing front fork. An engagement clutch, a one-way hub, and torque limiting clutch operatively engaged with the front wheel drive are also disclosed.
Owner:CHRISTINI TECH
Hybrid Motor Vehicle Driveline
A hybrid motor vehicle (10) has a four wheel drive arrangement in which the front wheels (12 and 13) are driven by the engine (11) in two wheel drive mode and all four wheels (12-15) in four wheel drive mode. The engine is connected to the rear wheels (14 and 15) through an auxiliary driveline which includes a first clutch (22) to connect to the engine (11), a propshaft (23) and a differential (25). An electric motor (28) is connected to the propshaft (23) for the purpose of driving the vehicle either with or without the assistance of the engine (11). A second clutch (27) is located between the propshaft (23) and the differential (25). When the vehicle is in two wheel drive mode, the propshaft (23) is disconnected from both the engine (11) and the rear wheels (14 and 15) and on switching to four wheel drive mode when the vehicle is moving the propshaft (23) is firstly spun up to a speed matching that of the engine (11) and rear wheels (14, 15) by the action of the electric motor (28). Then the auxiliary driveline (21) is reconnected by engaging the first and second clutches (22, 27). This reduces any acceleration jerk perceived by the driver.
Owner:FORD GLOBAL TECH LLC
Drive control device for standby four-wheel drive vehicle
InactiveUS20120203416A1Improve fuel economyGreat power transmission lossHybrid vehiclesDigital data processing detailsBrake torqueRegenerative brake
Provided is a drive control device for a standby four-wheel drive vehicle having primary drive wheels coupled to a drive source including a motor generator that generates a regenerative braking torque and a clutch device disposed between the drive source and secondary drive wheels to switch a two-wheel drive state using the primary drive wheels and a four-wheel drive state using the primary drive wheels and the secondary drive wheels, including: a transmission torque control portion that causes the clutch device to set a transmission torque between the drive source and the secondary drive wheels to zero so as to allow only the primary drive wheels to perform regenerative braking if a request braking torque of the vehicle is equal to or lower than a predetermined primary-drive-wheel regeneration limit torque during the regenerative braking by the motor generator, the transmission torque control portion causing the clutch device to generate the transmission torque between the drive source and the secondary drive wheels so as to allow the primary drive wheels and the secondary drive wheels to perform the regenerative braking if the request braking torque exceeds the primary-drive-wheel regeneration limit torque.
Owner:TOYOTA JIDOSHA KK
Drivetrain for a vehicle and method of controlling same
A vehicle drivetrain can include a primary pair of drive wheels and a secondary pair of drive wheels and can be selectively switched between a two-wheel drive mode and a four-wheel drive mode. When the drivetrain is in the two-wheel drive mode, the secondary pair of wheels are disconnected from the prime mover and the multi-ratio transmission. Also, when the drivetrain is in the two-wheel drive mode, the components used to drive the secondary pair of drive wheels can be rotationally isolated from each of the secondary pair of wheels, the prime mover and the multi-ratio transmission.
Owner:HONDA MOTOR CO LTD
Automatic Control of Driveline States
InactiveUS20120095659A1Improve fuel economyMinimize disruptionDigital data processing detailsExternal condition input parametersVehicle dynamicsAutomatic control
A method for controlling a vehicle driveline includes using current conditions to estimate wheel slip probability and vehicle dynamics handling support requirements, producing two-wheel drive operation, if said slip probability and handling support requirement is low and a condition for forced driveline connection is absent, and producing four-wheel drive operation, if said slip probability and / or handling support requirement is high and a condition for forced driveline disconnection is absent.
Owner:FORD GLOBAL TECH LLC
Driving-force transmitting apparatus for four-wheel-drive vehicle
InactiveUS20110082004A1Reduced fuel efficiencyLow efficiencyInternal combustion piston enginesToothed gearingsEngineeringFront-wheel drive
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.
Owner:UNIVANCE CORP
Two wheel drive bicycle
InactiveUS6161855ASafe and effective operationMinimal rider dangerGearingRotary transmissionsTransmitted powerEngineering
The present invention describes a two-wheel drive bicycle. The drive train, which supplies power to the front wheel, is incorporated into a modified frame. The bicycle includes a rear wheel driven by a traditional chain mechanism. The front wheel is driven by a series of shafts transmitting power from the driven rear wheel to the front wheel.
Owner:CHRISTINI TECH
Wheel drive system for independently driving right and left wheels of vehicle
InactiveUS7276005B2Improve the installation effectImprove compactnessFuel cell auxillariesPower to auxillary motorsDrive shaftReduction ratio
A wheel drive system for independently driving right and left wheels of a vehicle is disposed between right and left wheels of the vehicle, and is comprised of a coaxial three-layer motor which includes an inner rotor, an outer rotor and a stator which are coaxially arranged; a first planetary gear reduction mechanism whose input is connected to the inner rotor, and whose output is connected to a first drive shaft of one of right and left wheels; and a second planetary gear reduction mechanism whose input is connected to the outer rotor and whose output is connected to a second drive shaft of the other of the right and left wheels. A reduction ratio of the first planetary gear reduction mechanism is greater than a reduction ratio of the second planetary gear reduction mechanism.
Owner:NISSAN MOTOR CO LTD
Control system for four-wheel-drive vehicle
ActiveUS20150096814A1Increase rotation speedReduce speed differenceNon-deflectable wheel steeringSteering gearsDrive wheelControl system
A control system includes a transfer. The transfer is disposed in a power transmission path between the driving power source and primary driving wheels and distributes dynamic power of the driving power source to the secondary drive wheels. A driving power transmission shaft transmits the dynamic power of the driving power source distributed by the transfer to the secondary drive wheels. A clutch mechanism is disposed in a power transmission path between the transfer and the driving power transmission shaft. A electronic control unit engages at least one of a first and second clutches and then engages the clutch mechanism on the basis of a steering state at the time of switching from a two-wheel-drive traveling state in which the clutch mechanism and the first and second clutches are disengaged to a four-wheel-drive traveling state in which the clutch mechanism and the first and second clutches are engaged.
Owner:TOYOTA JIDOSHA KK
Four-wheel drive vehicle running normally and with object towed thereby
InactiveUS20060231314A1Small sizeIncreased durabilityDigital data processing detailsAutomatic initiationsDrive wheelWheel speed sensor
A vehicle includes a wheel speed sensor sensing a vehicle speed V, a 2WD / 4WD switch operative to input an instruction to switch between a two-wheel driving state and a four-wheel driving state, a transfer and an actuator switching the two-wheel driving state and the four-wheel driving state, and an ECU driving the actuator. The ECU instructs the actuator to switch from the four-wheel driving state to the two-wheel driving state regardless of the switching instruction from the 2WD / 4WD switch if the vehicle tows a trailer and runs in the four-wheel driving state when the vehicle speed exceeds a predetermined value. Consequently, it is possible to provide a four-wheel drive vehicle capable of running while towing an object and also avoiding an increase in the size of the peripheral parts of driving wheels.
Owner:TOYOTA JIDOSHA KK
Two-wheel drive bicycle
InactiveUS6161854AImprove securitySignificantly increase speed during navigationGearingRotary transmissionsFront-wheel driveTwo-wheel drive
The present invention is a fully functioning two-wheel drive bicycle (78). The drive train which supplies power to the front wheel (17) is incorporated into a modified frame (91) and comprises a rear wheel (90) driven by the traditional chain or shaft mechanism (23) and the front wheel driven (17) by a series of rigid shafts transferring power from the driven rear wheel (90) to the front wheel (17).
Owner:CHRISTINI TECH
Dual data rate traction control system for a four wheel drive electric vehicle
A traction control system is provided that is applicable to both two wheel drive and four wheel drive electric vehicles, and which is capable of handling both low frequency and high frequency control duties. The system uses proportional gains in order to minimize controller delays and insure a natural feeling traction control system.
Owner:ATIEVA USA INC
All terrain vehicle and integrated control panel for attachment to handlebar of all terrain vehicle
InactiveUS20070051552A1Facilitate selective mechanical couplingMotorcyclesPropulsion unit arrangementsDrive wheelCoupling
A control panel can be attached to a handlebar of an all terrain vehicle adjacent to a handgrip. The control panel includes a drive wheel selection actuator and at least one other control device other than a drive wheel selection actuator, such as an engine control or lamp control, for example. An engine control can include an engine start pushbutton and / or an engine stop switch, and a lamp control can be configured to selectively activate at least one of a running light, a headlight, and a turn signal. The drive wheel selection actuator can be connected with a drive system of an all terrain vehicle and can be configured to facilitate selective mechanical coupling of the drive system with the wheels of the all terrain vehicle. In some embodiments, the drive wheel selection actuator can selectively generate a two wheel drive command signal and a four wheel drive command signal.
Owner:HONDA MOTOR CO LTD
Torque distribution control device for four-wheel drive vehicle
InactiveUS6842681B2Securing drive-through capabilityMaintaining stability in motionClutchesDigital data processing detailsDrive wheelWheel speed sensor
A torque distribution control device for a four-wheel drive vehicle has a torque distribution device for distributing the drive power transmitted from an engine to either of the front wheels or the rear wheels as prime drive wheels, to other wheels as sub-drive wheels. The control device judges whether or not an abnormality is involved in wheel speed signals which are input from wheel speed sensors associated respectively with the front and rear wheels. A normal-state method of calculating a command torque which is applied to the torque distribution device to vary the drive power transmitted to the sub-drive wheels, is then altered to an abnormal-state method of calculating the command torque based on data which does not include one wheel speed signal involving the abnormality when the same occurs with one of the wheel speed signals, whereby the vehicle is enabled to continue the four-wheel drive even when the abnormality occurs.
Owner:TOYODA MASCH WORKS LTD
Two-wheel drive two-wheeled vehicle
InactiveUS7328766B2Keep full controlIncreased traction and mobilityWheel based transmissionRotary transmissionsEngineeringFront-wheel drive
A two-wheel drive motorcycle having a drive train that supplies power to the front wheel and includes a series of rigid shafts or other internalized drive systems. The front wheel drive consists of components located on the axis of steering within the head tube and positioned symmetrically in a counterbalancing fashion within the front fork in order to counteract the torque reactions from the rotating front wheel drive while providing a full range of steering. The front wheel drive lengthens and shortens in parallel with the shock-absorbing front fork. An engagement clutch, a one-way hub, and torque limiting clutch operatively engaged with the front wheel drive are also disclosed.
Owner:CHRISTINI TECH
Driving force switching control apparatus
ActiveUS20050173179A1Improve driveabilityGuaranteed uptimeDigital data processing detailsPropulsion using engine-driven generatorsRolling resistanceRoad surface
A driving force switching control apparatus in a vehicle which runs by two-wheel drive or four-wheel drive in accordance with the running state. The apparatus includes a device for determining whether the vehicle runs at a constant speed; and a device for determining a drive system of the vehicle running at a constant speed to be the two-wheel drive or the four-wheel drive according to road surface conditions computed using rolling resistance. A threshold value for switching between the two-wheel drive and the four-wheel drive is changed in a manner such that a determination area where the four-wheel drive is selected increases according to increase in the rolling resistance. Sufficient driving force transmitted to the wheels can be secured even when the road surface condition varies, and accordingly, sufficient driving force is secured also when the running condition is changed from constant speed running to acceleration or deceleration running.
Owner:HONDA MOTOR CO LTD
Electric Front Wheel Drive System for Motorcycle
A two-wheel drive motorcycle having an electric motor driving the front wheel, an embodiment of the present invention, in addition to a conventional rear wheel drive train. The front wheel drive disclosed herein may be adapted to conventional telescoping (or shock-absorbing) front fork suspension systems. The front wheel drive of the two-wheel drive motorcycle may be applied to a number of different types of motorcycles including motocross, enduro, dual-sport and touring motorcycles.
Owner:NICOSON REGINALD LEONARD
Vehicle driving force control apparatus
A driving force control apparatus is configured to automatically apply a braking force to a plurality of wheels in order to descend down a hill at a constant speed, such that the wheels can be prevented from being locked by the braking force, and the vehicle speed can be prevented from increasing. In order for a vehicle to travel at a preset speed, the vehicle driving force control apparatus detects the speeds of the wheels subjected to a braking force, and switches the vehicle from a four-wheel drive (4WD) mode in which driving force is distributed to all of the wheels to a two-wheel drive (2WD) mode in which driving force is distributed to only the front wheels. The switch is made when the vehicle speed is equal to or less than a lower limit threshold. The front wheels are prevented from locking, and increases in the vehicle speed are suppressed.
Owner:NISSAN MOTOR CO LTD
Driving force transmitting device for four-wheel drive vehicle
InactiveUS20090211830A1Decreases oil viscosity resistanceDecreases friction lossRoad transportMagnetically actuated clutchesFriction torqueDrag torque
A driving force transmission device for four-wheel-drive vehicle based on the two-wheel drive of rear wheels or front wheels is provided. In the case of the two-wheel drive of rear wheels, a multi-disc clutch mechanism for controlling the driving force distribution to a front wheel output shaft, and a disconnection / connection mechanism for disconnecting and connecting a front wheel differential and a left front wheel drive shaft are provided, and in the two-wheel drive of rear wheels, the dragging torque of the multi-disc clutch mechanism is made smaller than the friction torque of a front wheel driving force transmission section, and the front wheel differential and the left front wheel drive shaft are disconnected by the disconnection / connection mechanism, thereby the rotation of the front wheel driving force transmission section is stopped.
Owner:UNIVANCE CORP
Electric vehicle four-wheel drive system and electric vehicle
ActiveCN106274468ATaking into account the powerImprove economyData processing managementControl devicesDrive wheelDrive shaft
An embodiment of the invention discloses an electric vehicle four-wheel drive system and an electric vehicle. The electric vehicle four-wheel drive system comprises: a front wheel drive subsystem for driving front wheels in motion to push the electric vehicle; a rear wheel drive subsystem for driving rear wheels in motion to push the electric vehicle; a front wheel automatic wheel-side clutch arranged between a front transmission shaft and the front wheels to engage or disengage the front wheel drive subsystem; a rear wheel automatic wheel-side clutch arranged between a rear transmission shaft and rear wheels to engage or disengage the rear wheel drive subsystem; a vehicle controller for, based on operation parameters of the electric vehicle, controlling engaging or disengaging action of the front wheel automatic wheel-side clutch and engaging action or disengaging action of the rear wheel automatic wheel-side clutch, and controlling output power of the front wheel drive subsystem and output power of the rear wheel drive subsystem. The embodiment provides improved dynamic property and energy consumption index and optimized space, and considers both dynamics and economy of a vehicle.
Owner:CH AUTO TECH CORP CO LTD
Drive control device for standby four-wheel drive vehicle
InactiveUS8700241B2Improve economyImprove powerHybrid vehiclesAnalogue computers for trafficBrake torqueRegenerative brake
Owner:TOYOTA JIDOSHA KK
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