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463 results about "Dog clutch" patented technology
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A dog clutch is a type of clutch that couples two rotating shafts or other rotating components not by friction but by interference. The two parts of the clutch are designed such that one will push the other, causing both to rotate at the same speed and will never slip.
Gear change mechanism
ActiveUS7303502B2Easy to participateSpace minimizationToothed gearingsInterengaging clutchesEngineeringDog clutch
A gear change mechanism coupling a pair of shafts employs a planetary gear set comprising a sun gear fast with a first of the shafts, planet gears in a planet carrier, and an annulus or ring gear, the latter being fixed. A selector hub slidable on the other of the shafts has sets of radially spaced dogs to engage with corresponding dogs on the planet carrier and sun gear respectively, so as to couple the shafts at two different ratios depending on the axial position of the selector hub. This results in a more axially compact package than conventional dog clutch gear changers. In an alternative embodiment a reversing mechanism is provided by fixing the planet carrier and engaging the selector hub with the sun gear or annulus depending on its axial position.
Owner:QINETIQ LTD
Electrically variable transmission having three planetary gear sets, clutched input, two fixed interconnections and a stationary member
InactiveUS7367911B2Best possible energy efficiency and emissionOptimal performance and capacity and package size and ratio coverageHybrid vehiclesElectric propulsion mountingGear wheelDog clutch
The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first, second and third differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, up to five selectable torque-transfer devices and possibly a dog clutch. The selectable torque transmitting devices are engaged to yield an EVT with a continuously variable range of speeds (including reverse) and up to four mechanically fixed forward speed ratios. The torque transmitting devices and the first and second motor / generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode.
Owner:GM GLOBAL TECH OPERATIONS LLC
Multi-mode electrically variable transmissions having two planetary gear sets with one fixed interconnection
ActiveUS20070105678A1Improve acceleration performanceBest possible energy efficiencyTransmission elementsPlural diverse prime-mover propulsion mountingElectric machineFixed ratio
The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first and second differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, four selectable torque-transfer devices, and a dog clutch. The selectable torque transfer devices are engaged singly or in combinations to yield an EVT with a continuously variable range of speeds (including reverse) and up to four mechanically fixed forward speed ratios. The torque transfer devices and the first and second motor / generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode.
Owner:GM GLOBAL TECH OPERATIONS LLC
Electrically variable transmission having three planetary gear sets, two fixed interconnections and a stationary member
InactiveUS20070219036A1Improve acceleration performanceBest possible energy efficiencyHybrid vehiclesElectric propulsion mountingGear wheelDog clutch
The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first, second and third differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, up to five selectable torque-transfer devices and possibly a dog clutch. The selectable torque transmitting devices are engaged to yield an EVT with a continuously variable range of speeds (including reverse) and up to four mechanically fixed forward speed ratios. The torque transmitting devices and the first and second motor / generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode.
Owner:GM GLOBAL TECH OPERATIONS LLC
Electrically variable transmission having three planetary gear sets, four fixed interconnections and clutched input
ActiveUS20070129196A1Improve acceleration performanceBest possible energy efficiencyHybrid vehiclesElectric propulsion mountingGear wheelEngineering
The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first, second and third differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, four or five selectable torque-transfer devices (two clutches and two or three brakes), and possibly a dog clutch. The selectable torque transfer devices are engaged to yield an EVT with a continuously variable range of speeds (including reverse) and mechanically fixed forward speed ratios. The torque transfer devices and the first and second motor / generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode.
Owner:GM GLOBAL TECH OPERATIONS LLC
Electrically variable transmission having three planetary gear sets, a stationary member and three fixed interconnections
ActiveUS20070197335A1Improve acceleration performanceBest possible energy efficiencyHybrid vehiclesElectric propulsion mountingGear wheelEngineering
The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first, second and third differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, up to six selectable torque-transfer devices, and possibly a dog clutch. The selectable torque transfer devices are engaged to yield an EVT with a continuously variable range of speeds (including reverse) and mechanically fixed forward speed ratios. The torque transfer devices and the first and second motor / generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode.
Owner:GM GLOBAL TECH OPERATIONS LLC
Clutch arrangements for an electrically-variable transmission
InactiveUS20110015021A1Reduce part complexityReduce weightHybrid vehiclesElectric propulsion mountingEngineeringDog clutch
Various embodiments of electrically-variable transmissions are provided that have a first and a second motor-generator, a first and a second planetary gear set, and two torque-transmitting mechanisms, including a rotating-type clutch and a stationary-type clutch. An input member is connected for common rotation with a ring gear of the first planetary gear set. Carriers of both of the planetary gear sets are connected for common rotation with one another, and with an output member. The first motor / generator is connected for common rotation with the sun gear of the first planetary gear set. The second motor / generator is connected for common rotation with the sun gear of the second planetary gear set. The rotating-type torque-transmitting mechanism is a dog clutch with a synchronizer. The stationary-type torque-transmitting mechanism may be either a dog clutch with a synchronizer or a selectable one-way braking clutch (SOWBC).
Owner:GM GLOBAL TECH OPERATIONS LLC
Active shift transmission, transmission control unit and automobile
ActiveUS7226379B2Transmission controlSignificant to useElectric propulsion mountingPropulsion using engine-driven generatorsControl systemDog clutch
The object of the invention is to provide a less expensive active transmission control system for an automobile, capable of disconnecting an engine, without increasing the number of dog clutches.In an active shift transmission, a second intermediate shaft is provided between a transmission input shaft connected with an engine and a transmission output shaft, and the transmission ratio is determined by the product of gear ratios of two sets of transmission gears. Further, a differential gear box is connected between both intermediate shafts and a motor is connected to the third shaft of this differential gear box, so that the engine torque is borne by the motor on a temporary basis, whereby active transmission is performed. When the transmission gear of the input shaft is released, the engine rotation loss at the time of regenerative braking can be eliminated by disconnecting the engine.
Owner:HITACHI ASTEMO LTD
Multi-mode electrically variable transmissions having two planetary gear sets with two fixed interconnections and clutched input
ActiveUS7288041B2Best possible energy efficiency and emissionOptimal performance and capacity and package size and ratio coverageElectric propulsion mountingToothed gearingsGear wheelForward speed
Owner:GM GLOBAL TECH OPERATIONS LLC
Electrically variable transmission having three planetary gearsets and four fixed interconnections
InactiveUS20070129203A1Improve acceleration performanceBest possible energy efficiencyToothed gearingsTransmission elementsGear wheelOperation mode
The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first, second and third differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, three or four selectable torque-transfer devices (one clutch and two or three brakes), and possibly a dog clutch. The selectable torque transfer devices are engaged to provide an EVT with a continuously variable range of speeds (including reverse) and up to four mechanically fixed forward speed ratios. The torque transfer devices and the first and second motor / generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode.
Owner:GM GLOBAL TECH OPERATIONS LLC
Apparatus and method for controlling transmission of straddle-type vehicle
A transmission control apparatus is provided for a straddle-type vehicle that has a clutch and a transmission with a dog clutch having a first gear and a second gear. The transmission control apparatus includes a clutch actuator configured to engage and disengage the clutch. A transmission actuator is configured to change a gear of the transmission. An input device is configured to generate a gear change command. A first sensor is configured to determine whether the vehicle is in a standstill condition. A controller is operatively connected to the clutch actuator, the transmission actuator and the first sensor. The controller is configured to, in response to the gear change command, set the clutch position between a partially engaged position and a completely released position if the vehicle is standing still as determined by the first sensor.
Owner:YAMAHA MOTOR CO LTD
Electrically variable transmission having three planetary gear sets and two fixed interconnections and a stationary interconnection
ActiveUS7294079B2Best possible energy efficiency and emissionOptimal performance and capacity and package size and ratio coverageHybrid vehiclesTransmission elementsGear wheelFixed ratio
The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first, second and third differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, and up to five selectable torque-transfer devices, and possibly a dog clutch. The selectable torque transfer devices are engaged singly or combinations of two to yield an EVT with a continuously variable range of speeds (including reverse) and up to four mechanically fixed forward speed ratios. The torque transfer devices and the first and second motor / generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode.
Owner:GM GLOBAL TECH OPERATIONS LLC
Multi-mode electrically variable transmissions having two planetary gear sets with two fixed interconnections and clutched input
ActiveUS20070072725A1Improve acceleration performanceBest possible energy efficiencyElectric propulsion mountingToothed gearingsGear wheelForward speed
Owner:GM GLOBAL TECH OPERATIONS LLC
Multi-mode electrically variable transmissions having two planetary gear sets with one fixed interconnection
ActiveUS7300374B2Best possible energy efficiency and emissionOptimal performance and capacity and package size and ratio coverageTransmission elementsPlural diverse prime-mover propulsion mountingFixed ratioElectric machine
The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first and second differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, four selectable torque-transfer devices, and a dog clutch. The selectable torque transfer devices are engaged singly or in combinations to yield an EVT with a continuously variable range of speeds (including reverse) and up to four mechanically fixed forward speed ratios. The torque transfer devices and the first and second motor / generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode.
Owner:GM GLOBAL TECH OPERATIONS LLC
Method and means for shifting a hydromechanical transmission
A method for achieving high quality shifts with one hydraulic unit near zero displacement when using dog clutches. This method includes selecting the proper displacement and vocation (whether the hydrostatic unit works as a pump or motor) of a low displacement hydraulic unit during the shift, selecting the appropriate speed differential between the clutch elements, selecting the proper vehicle speed at which to make the shift, and sequencing the displacement changes of the hydraulic units with a controller in order to achieve the desired shift conditions.
Owner:SAUER DANFOSS NORDBERG
Torque-transmitting assembly with dog clutch and hydrostatic damper and electrically variable transmission with same
ActiveUS20080182693A1Smooth and reliable engagementIncrease resistanceHybrid vehiclesElectric propulsion mountingEngineeringControl theory
A torque-transmitting assembly is provided that includes a dog clutch isolated by a device such as a rotary hydrostatic damper from relative loading on the torque input member and torque output member that it is to connect for common rotation and torque transmission. Although its use is not limited to electrically-variable transmissions, the torque transmitting assembly is able to function even with the large inertia and potentially random torque inputs associated with theses types of transmissions.
Owner:GM GLOBAL TECH OPERATIONS LLC
Clutch and synchronizer having permanent magnet actuators
InactiveUS20050040000A1Increase engagementSpeedFluid actuated clutchesMagnetically actuated clutchesTransfer caseDirect coupling
A friction clutch pack utilizes permanent magnets and induction rings to actuate a ball ramp actuator which come in turn, engages the friction clutch pack to transfer torque between drive and driven members in, for example, a motor vehicle transfer case. The permanent magnets and induction rings may also be utilized as a synchronizer to urge the speeds of two rotating members into synchronism to facilitate engagement of a direct coupling i.e., a dog clutch.
Owner:BORGWARNER INC
Two-planetary electrically variable transmissions with multiple fixed ratios
ActiveUS20070275814A1Improve acceleration performanceBest possible energy efficiencyHybrid vehiclesElectric propulsion mountingElectric machineFixed ratio
The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first and second differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, up to six selectable torque-transfer devices and possibly a dog clutch. The selectable torque transmitting devices are engaged to yield an EVT with a continuously variable range of speeds (including reverse) and at least four mechanically fixed forward speed ratios. The torque transmitting devices and the first and second motor / generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode.
Owner:GM GLOBAL TECH OPERATIONS LLC
Fail-operational multiple lifting-rotor aircraft
InactiveUS20100276549A1Avoid failureImprove survivabilityVertical landing/take-off aircraftsRotocraftSurvivabilityCoupling
A rotorcraft having multiple rotors, and wings that provide lift in forward flight, has mechanical coupling between rotors that can be disengaged and optionally reengaged, during flight. The coupling can, which can prevent a failure of one rotor from interfering with rotation of the other rotor(s), can be accomplished using many different types of devices, including for example, dog clutches and friction clutches, and collapsible clutches. Disengagement can range from being completely under control of an operator, to partially under operator control, to completely automatic. Among many other benefits, designing, manufacturing, fitting, retrofitting or in some other manner providing an aircraft with a device that can disengage rotation of one of the rotors from that of another one of the rotors during flight can be used to improving survivability in an emergency situation.
Owner:KAREM ABE
Electrically variable transmission having three planetary gear sets, a stationary member, three fixed interconnections and clutched input
ActiveUS20070275807A1Improve acceleration performanceBest possible energy efficiencyHybrid vehiclesElectric propulsion mountingGear wheelForward speed
The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first, second and third differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, up to five selectable torque-transfer devices and possibly a dog clutch. The selectable torque transmitting devices are engaged to yield an EVT with a continuously variable range of speeds (including reverse) and up to four mechanically fixed forward speed ratios. The torque transmitting devices and the first and second motor / generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode.
Owner:GM GLOBAL TECH OPERATIONS LLC
Twin clutch speed-change apparatus
ActiveUS20090084210A1Reduce shift shockReduce gapToothed gearingsGearing controlGear wheelDog clutch
A twin clutch speed-change apparatus that can reduce shift shock includes a transmission with multiple gear pairs disposed between a main shaft and a countershaft. A twin clutch is provided on the main shaft, a rotational drive force from an engine being connected / disconnected between the transmission and the engine, a dog clutch is provided between an axially slidably attached slidable gear and an axially non-slidably attached non-slidable gear to select a gear pair, for transmitting a rotational drive force, from the multiple gear pairs. Dog teeth of the dog clutch include steps different in axial height from each other between a portion abutted against a lateral wall surface of a dog hole when the rotational drive force is transmitted by the dog clutch, and a portion abutted against a lateral wall surface of the dog hole when the rotational drive force is not transmitted by the dog clutch.
Owner:HONDA MOTOR CO LTD
Multiplexed control system and method for an electrically variable hybrid transmission
ActiveUS7396306B2Effective controlHybrid vehiclesElectric propulsion mountingElectronic transmissionLow speed
A powertrain has an electrically variable hybrid transmission having an electro-hydraulic control system, plurality of electrical power units, and a plurality of torque transmitting mechanisms selectively engageable by the electro-hydraulic control system to provide four forward speed ranges, a neutral condition, an electric low and high speed mode, and an electrically variable low and high speed mode. Additionally, the electrically variable hybrid transmission provides a parallel reverse mode and a series reverse mode. The present invention provides an improved electro-hydraulic control system having a multiplexed electronic transmission range selection (ETRS) and reverse dog clutch system for an electrically variable hybrid transmission. The multiplexed control system of the present invention allows effective control of both the ETRS system and reverse dog clutch system using only one solenoid valve.
Owner:ALLISON TRANSMISSION INC
Two-planetary electrically variable transmissions with multiple fixed ratios
ActiveUS7473199B2Best possible energy efficiency and emissionOptimal performance and capacity and package size and ratio coverageHybrid vehiclesElectric propulsion mountingFixed ratioElectric machine
An electrically variable transmission family is provided which has low-content, low-cost electrically variable transmission mechanisms including first and second differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, up to six selectable torque-transfer devices and possibly a dog clutch. The selectable torque transmitting devices are engaged to yield an EVT with a continuously variable range of speeds (including reverse) and at least four mechanically fixed forward speed ratios. The torque transmitting devices and the first and second motor / generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode.
Owner:GM GLOBAL TECH OPERATIONS LLC
Electrically variable transmission having at least three planetary gear sets and one fixed interconnection
ActiveUS20070298924A1Best possible energy efficiency and emissionOptimal performance and capacity and package size and ratio coverageHybrid vehiclesToothed gearingsGear wheelEngineering
The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first, second and third (and possibly fourth) differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, five, six or seven selectable torque-transfer devices and possibly a dog clutch. The selectable torque transmitting devices are engaged to yield an EVT with a continuously variable range of speeds (including reverse) and up to six mechanically fixed forward speed ratios. The torque transmitting devices and the first and second motor / generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode.
Owner:GM GLOBAL TECH OPERATIONS LLC
Multiplexed control system and method for an electrically variable hybrid transmission
ActiveUS20070117671A1Effective controlHybrid vehiclesElectric propulsion mountingElectronic transmissionLow speed
A powertrain has an electrically variable hybrid transmission having an electro-hydraulic control system, plurality of electrical power units, and a plurality of torque transmitting mechanisms selectively engageable by the electro-hydraulic control system to provide four forward speed ranges, a neutral condition, an electric low and high speed mode, and an electrically variable low and high speed mode. Additionally, the electrically variable hybrid transmission provides a parallel reverse mode and a series reverse mode. The present invention provides an improved electro-hydraulic control system having a multiplexed electronic transmission range selection (ETRS) and reverse dog clutch system for an electrically variable hybrid transmission. The multiplexed control system of the present invention allows effective control of both the ETRS system and reverse dog clutch system using only one solenoid valve.
Owner:ALLISON TRANSMISSION INC
Electromagnetic axle disconnect system
ActiveUS20140190781A1Reduce and eliminate forceMagnetically actuated clutchesFriction clutchesControl theoryDog clutch
An electromagnetic disconnect system has an output housing having an armature with a coil and an output shaft bearing fixed to it. A pressure plate and a sliding dog clutch are slidably attached to an output shaft that is in rotational contact with the output shaft bearing. This system further has an input housing attached to the output housing. The input housing has an input shaft bearing fixed to it. The electromagnetic disconnect system further has a disengagement spring and an axially fixed dog clutch rigidly attached to an end of an input shaft that is axially dispose through an opening in the input housing and in rotational contact with the input shaft bearing.
Owner:DANA AUTOMOTIVE SYST GRP LLC
Multi-speed transmission
A transmission gearing arrangements produces up to ten forward and one reverse speed ratios by selective engagement of various combinations of four shift elements. Each disclosed transmission includes four planetary gear sets and at least six shift elements. One of the shift elements may be a dog clutch. Optional passive one way brakes simplify the control.
Owner:FORD GLOBAL TECH LLC
Electrically variable transmission having three planetary gear sets, clutched input, two fixed interconnections and a stationary member
InactiveUS20070270262A1Best possible energy efficiency and emissionOptimal performance and capacity and package size and ratio coverageHybrid vehiclesElectric propulsion mountingGear wheelForward speed
The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first, second and third differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, up to five selectable torque-transfer devices and possibly a dog clutch. The selectable torque transmitting devices are engaged to yield an EVT with a continuously variable range of speeds (including reverse) and up to four mechanically fixed forward speed ratios. The torque transmitting devices and the first and second motor / generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode.
Owner:GM GLOBAL TECH OPERATIONS LLC
Torque-transmitting assembly with dog clutch and hydrostatic damper and electrically variable transmission with same
ActiveUS7594869B2Smooth and reliable engagementIncrease resistanceHybrid vehiclesElectric propulsion mountingTorque transmissionControl theory
A torque-transmitting assembly is provided that includes a dog clutch isolated by a device such as a rotary hydrostatic damper from relative loading on the torque input member and torque output member that it is to connect for common rotation and torque transmission. Although its use is not limited to electrically-variable transmissions, the torque transmitting assembly is able to function even with the large inertia and potentially random torque inputs associated with theses types of transmissions.
Owner:GM GLOBAL TECH OPERATIONS LLC
Electrically variable transmission having three planetary gear sets and clutched motor/generators
ActiveUS20070298923A1Improve acceleration performanceBest possible energy efficiencyTransmission elementsPlural diverse prime-mover propulsion mountingGear wheelForward speed
The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first, second and third differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, up to five selectable torque-transfer devices and possibly a dog clutch. The selectable torque transmitting devices are engaged to yield an EVT with a continuously variable range of speeds (including reverse) and four mechanically fixed forward speed ratios. The torque transmitting devices and the first and second motor / generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode.
Owner:GM GLOBAL TECH OPERATIONS LLC
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