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33results about How to "Improve shift feel" patented technology

Closed-Loop Torque Phase Control for Shifting Automatic Transmission Gear Ratios Based on Friction Element Load Estimation

A closed loop shift control apparatus and method based on estimated torque in friction elements controls a torque transfer phase when shifting from a low gear configuration to a high gear configuration for an automatic transmission system. When pressure actuated friction elements are selectively engaged and released to establish torque flow paths in the transmission, estimates of torsional load exerted on the off-going friction element are used to predict the optimal off-going friction element release timing for achieving a consistent shift feel. The estimated torque is preferably calculated by using estimated torque signals generated as a function of speed measurements represented either the engine speed and turbine output speed or transmission output speed and wheel speed under dynamically changing conditions.
Owner:FORD GLOBAL TECH LLC

Closed-Loop Torque Phase Control for Shifting Automatic Transmission Gear Ratios Based on Friction Element Load Sensing

A closed loop shift control apparatus and method based on friction element load controls a torque transfer phase when shifting from a low gear configuration to a high gear configuration for an automatic transmission system. When pressure actuated friction elements are selectively engaged and released to establish torque flow paths in the transmission, measurements or estimates of torsional load exerted on the off-going friction element are used to predict the optimal off-going friction element release timing for achieving a consistent shift feel. The ideal timing to release the off-going friction element is uniquely defined when torque load exerted onto the off-going friction element becomes substantially zero. An on-coming clutch engagement process is controlled by a closed loop control based on measurements or estimates of on-coming clutch torque capacity for a constant shift feel under dynamically changing conditions.
Owner:FORD GLOBAL TECH LLC

Control method for electromagnetic valve of automatic transmission

The invention provides a control method for an electromagnetic valve of an automatic transmission and relates to the technical field of control over the automatic transmission. The control method aims at solving the problem that an existing electromagnetic valve of an automatic transmission is low in response speed. The control method for the electromagnetic valve of the automatic transmission includes the steps that firstly, a current I keeping the electromagnetic valve in a dead zone critical point is found according to the current and plunger position characteristics of the electromagnetic valve; secondly, when the electromagnetic valve does not work, a current I1 is kept for the electromagnetic valve, the current I1 is larger than the current I and smaller than a clutch kisspoint current, the electromagnetic valve has a tiny opening degree, and it is guaranteed that tiny oil pressure exists between the electromagnetic valve and a corresponding clutch; and thirdly, when the electromagnetic valve prepares to start to work, a working current I2 is continuously supplied to the electromagnetic valve, the current I2 is quickly increased on the basis of the current I1, and it is guaranteed that the oil pressure of the clutch corresponding to the electromagnetic valve is gradually increased. The control method has the beneficial effects that the working response speed of the electromagnetic valve is high, and the oil pressure of the clutch is more stably established, gear shifting control over the automatic transmission is facilitated, and the gear shifting feeling of a vehicle is improved.
Owner:HARBIN DONGAN AUTOMOTIVE ENGINE MFG CO LTD

Manual valve of automatic transmission

The present invention relates to a manual valve of an automatic transmission, having a groove formed at an exterior surface thereof so as to reduce shock and to improve shift feel by allowing oil to flow through the groove when releasing hydraulic pressure. An exemplary manual valve of an automatic transmission includes a valve body and a valve spool slidably provided in the valve body. The valve body includes a spool receiving part, a first port, a second port, and a third port. The valve spool includes an underdrive land assembly and a reverse land assembly, wherein at least one of the underdrive land assembly and the reverse land assembly has a groove formed on an exterior circumference thereof along a sliding direction of the valve spool such that oil flows therethrough when hydraulic pressure is released.
Owner:HYUNDAI MOTOR CO LTD

Speed ratio change operation device, and transmission

The invention relates to a speed ratio change operation device and a speed changer. A speed ratio change operation device includes: a case (101); a shift select lever (103) housed in the case (101) and provided slidably in a direction of an axis and rotatably in a circumferential direction; a speed ratio change operating lever (250) that operates the shift select lever (103); a select-purpose cam (160) that is fixed to the shift select lever (103) and rotates about the shift select lever (103); a lock ball (150) that presses the select-purpose cam (160); and a bevel portion (163, 164) that is formed in an end portion of a press surface (162, 163, 164) of the select-purpose cam (160) which is pressed by the lock ball (150), the end portion being positioned in a shift displacement direction in which the shift select lever (103) is displaced at the time of a shift operation. The bevel portion is inclined so that a point on the bevel portion approaches the shift select lever (103) as the point is moved in the shift displacement direction. Thus, the operation feeling of the shift operation can be improved.
Owner:TOYOTA JIDOSHA KK

Clutch sleeve for a shift clutch and shift clutch

A clutch sleeve is provided for a shift clutch having a synchronizing device, which includes, but is not limited to a clutch body (8,9), which is connected in a rotationally-fixed manner to gear wheels (4,5) mounted so it is rotatable on a shaft (2) and has coupling teeth (30) and a friction cone as well as synchronizing rings (12,13) having a counter cone and blocking teeth (28), and which has shift teeth (31,32), the clutch sleeve (16) having shift teeth (31,32), which are designed in such a manner that a first group of the shift teeth (27) cooperates with the blocking teeth (28) until a synchronized speed is reached and a second group of the shift teeth (29) engages in the coupling teeth (30) after the synchronized speed is reached.
Owner:GM GLOBAL TECH OPERATIONS LLC

Apparatus and method for controlling creep torque of hybrid electric vehicle

An apparatus and a method for controlling a creep torque of a hybrid electric vehicle that outputs the creep torque to improve shift feel and fuel consumption of the hybrid electric vehicle, may include the method for controlling a creep torque of a hybrid electric vehicle that may include detecting data of the hybrid electric vehicle for controlling the creep torque, determining whether a vehicle speed is greater than or equal to a predetermined speed and the hybrid electric vehicle is shifting from a current shift stage to 1 stage when the current shift stage is 3 stage or 2 stage, applying a creep torque factor depending on a shift stage and a brake amount when the hybrid electric vehicle is shifting from 3 stage or 2 stage to 1 stage, and controlling a motor to output the creep torque to which the creep torque factor is applied.
Owner:HYUNDAI MOTOR CO LTD +1

Method for clutch fluid charging control and double clutch transmission system

The invention discloses a method for clutch fluid charging control and a double clutch transmission system. A clutch hydraulic control method may include performing a clutch pack flow rate control, which pre-fills a flow rate for clutch engage in a clutch pack of a clutch before shifting, when a shifting attempt is detected in a clutch controller.
Owner:HYUNDAI MOTOR CO LTD +1

System for adjusting shifting force of manual transmission

The invention belongs to the field of automobile transmissions and particularly relates to a system for adjusting shifting force of a manual transmission. The system is characterized by being composed of two independent subsystems. One subsystem is a gear shifting execution system which comprises a synchronizer, a gear shifting fork, a fork shaft, a guide block and a gear shifting poking head. The gear shifting execution system is used for specifically executing gear shifting operation of the transmission, and the gear shifting poking head rotates to drive the guide block, the fork shaft and the gear shifting fork to move along the axial direction of the transmission and finally drive the synchronizer to achieve gear shifting. The other subsystem is a shifting force adjusting system which can adjust the shifting force through a replaceable self-locking spring device according to the shifting force, the self-locking spring device is directly fastened on an upper cover through threads, and a self-locking device can be replaced according to different gear shifting force requirements to achieve quick adjustment. The system improves adjusting accuracy and efficiency of the shifting force, improves system working reliability and structure compactness by adopting the shifting force adjusting system which is more scientific and reasonable.
Owner:ZHEJIANG WANGLIYANG TRANMISSION CO LTD

Methods and system for improving hybrid vehicle transmission gear shifting

Methods and systems are provided for operating a driveline of a hybrid vehicle that includes an internal combustion engine, a rear drive unit electric machine, an integrated starter / generator, and a transmission are described. In one example, inertia torque compensation is provided to counter inertia torque during a power-on upshift.
Owner:FORD GLOBAL TECH LLC

Force increasing device of gearbox

A servo operation apparatus for a transmission comprising an input shaft to which the shift-change operation force is mechanically transmitted from a shift lever, a servo unit for boosting the shift-change operation force by feeding a working fluid, and a valve device which feeds the working fluid to, or drains the working fluid from, the servo unit depending upon the shift-change operation of the shift lever, wherein provision is made of an working fluid feed control means which feeds the working fluid in such a manner that the pressure of the working fluid in the servo unit is raised with a steep gradient in the former half until a predetermined initially raised pressure value is reached and, thereafter, is raised in the latter half with a gradient less steep than that of said former half. Or, when the apparatus is equipped with a reaction device which imparts reaction to the shift-change operation force transmitted to the input shaft by utilizing the working fluid, provision is made of a working fluid feed control means which feeds the working fluid in such a manner that the rise of the pressure of the working fluid in the reaction device is delayed behind the rise of the pressure of the working fluid in the servo unit.
Owner:NISSAN DIESEL MOTOR CO

Gear selecting and shifting hydraulic soft shaft

The invention discloses a gear selecting and shifting hydraulic soft shaft. The gear selecting and shifting hydraulic soft shaft comprises a hydraulic cylinder shell. A push rod is arranged on one side of the hydraulic cylinder shell. One end of the push rod extends into the hydraulic cylinder shell. A piston is arranged in the hydraulic cylinder shell and connected with the push rod. A groove is formed in the middle portion of the piston. A first seal ring is arranged between inner walls of the groove. A second seal ring is arranged on the side, away from the piston, of the first seal ring. The other side of the hydraulic cylinder shell is connected with a shaft body. A gas bleed screw is arranged on the side, close to the shaft body, on the hydraulic cylinder shell. The gear selecting and shifting hydraulic soft shaft is reasonable in design, gas in hydraulic pipelines can be drawn out through a gas bleed screw hole, and liquid is prevented from flowing out; the gear selecting and shifting hydraulic soft shaft has the beneficial effects of being low in start resistance, good in sealing effect, small in sliding resistance, high in movement speed and the like; and the idle stroke generated by the size interval between steel wire structures frequently used at present is eliminated, and therefore the stroke efficiency is improved, the gear shifting hand feeling is improved, and the gear shifting comfort is improved.
Owner:合肥创智汽车技术开发有限公司

Apparatus for controlling automatic transmission and method of controlling automatic transmission

A control apparatus of an automatic transmission includes an electric hydraulic pump including a motor and a pump, an actuator for engaging or releasing a friction element by controlling a hydraulic pressure discharged from the pump, and a transmission control unit (TCU) for correcting a control signal to control the actuator depending on a dynamic characteristic coefficient of the friction element and the actuator during shifting when outputting the control signal to the actuator.
Owner:HYUNDAI MOTOR CO LTD

Semi-automatic transmission control device

InactiveCN105840805AReduced shift strengthLow costGearing controlEngineeringUltimate tensile strength
The invention provides a semi-automatic transmission control device which comprises a gear-shifting control unit, a gear-shifting booster, a traveling computer, a servo motor, a gear-shifting handle, a mechanical control body part and a clutch pedal. The servo motor is used for replacing the gear-selecting function of a transmission, the gear-shifting booster is used for replacing the gear-shifting function of the transmission, and by means of the control unit integrated on a gear-shifting handle ball and a gear-shifting controller, the gear-shifting function can be achieved easily. The gear-shifting intensity is reduced by 95% or above. Compared with a common mechanical transmission control device, the device is easy to operate, small in arrangement space, high in transmission efficiency, excellent in gear-shifting hand feeling and capable of being compared favorably with that of a common family car. Compared with the AMT, the device is low in cost, the execution strategy is simple, the design is relatively simple, and few fault points are generated.
Owner:SHAANXI FAST GEAR CO

Automatic transmission

The invention concerns an automatic transmission with an engine control module and a process for controlling an automatic transmission. In order to assure secure positive torque requests during lift foot upshifts, an automatic transmission is described which comprises a transmission control module with means for sending an upshift positive torque request on CAN and means for an upshift positive torque supervision preventing the transmission from requesting unexpected positive torque. The means for an upshift positive torque supervision are designed to differentiate upshift conditions under which the positive torque is not expected to occur from shift conditions where it is expected to occur. They allow secure positive torque requests during lift foot upshifts.
Owner:GM GLOBAL TECH OPERATIONS LLC

Gear shift damping component and automobile gear shift system

The invention provides a gear shifting and vibration reduction assembly and a car gear shifting system, and relates to the technical field of the car gear shifting system. The gear shifting and vibration reduction assembly comprises a gear shifting arm, a balancing weight structure and a vibration reduction structure; the gear shifting arm and a speed changer are connected through a gear shiftingrod pin; the balancing weight structure is rotationally connected with the gear shifting rod pin; the gear shifting arm and the balancing weight structure are connected through a connector; the gear shifting arm can drive the balancing weight structure through the connector to rotate around the gear shifting rod pin; and the vibration reduction structure is arranged between the connector and the gear shifting arm and / or between the connector and the balancing weight structure. The car gear shifting system at least comprises a gear shifter, a gear shifting flexible shaft, the speed changer andthe gear shifting and vibration reduction assembly; the gear shifting flexible shaft is connected between the gear shifter and the gear shifting arm; and the gear shifting arm is arranged on the speedchanger. The problem that in the prior art, a balancing weight is directly connected with a gear shifting arm, so that vibration is transmitted to a gear shifting handball to easily cause numbness issolved.
Owner:GEELY AUTOMOBILE INST NINGBO CO LTD +1

An integrated structure of gas valve and pressure switch

The invention provides a gas valve and pressure switch integrated structure which is characterized in that a contact head, a piston, a stator plate and a rotor plate are all mounted in a valve seat; one end of the piston is connected with the contact head; the other end of the piston is in contact with the rotor plate; the contact head and the piston can axially move in the valve seat; in the free state, the contact head and the piston stay on the left-most side under the action of a first spring; the rotor plate clings to the stator plate under the action of a second spring; when in gear, the integrated valve contact head and the piston are subjected to external pressure and contracted inward, and the rotor plate is pushed by the piston to be separated from the stator plate; and at the moment, a gas inlet is disconnected from a gas exhaust port, and a circuit is turned off. According to the gas valve and pressure switch integrated structure, a gas circuit control valve and a pressure switch are integrated, thereby eliminating one procedure for the handing feeling of idle gear positioning, and then effectively improving the hand feeling of gear shifting; and besides, one procedure for hole machining on a control device shell is eliminated, machining of a shifting block or a spline housing groove and bulges is reduced, and the part machining and assembly cost is reduced.
Owner:SHAANXI FAST GEAR CO

Automobile synchronizer with unidirectional locking surface

The invention discloses an automobile synchronizer with a unidirectional locking surface. A plurality of locking pin holes I (4) and a plurality of location pin holes I (5) are uniformly distributed in the circumferential direction of a synchronous slide sleeve (1); a part of the locking pin holes I (4) in the synchronous slide sleeve (1) correspond to locking pin holes II (6) and locking pin holes III (8); the location pin holes I (5) in the synchronous slide sleeve (1) correspond to location pin holes II (7) and location pin holes III (9); a locking pin (10) penetrates in the space among thelocking pin holes I (4), the locking pin holes II (6) and the locking pin holes III (8), a location pin (11) penetrates in the space among the location pin holes I (5), the location pin holes II (7)and the location pin holes III (9), and then the synchronous slide sleeve (1) is connected with a left synchronous cone ring (2) and a right synchronous cone ring (3) to form one piece; and a locationdevice is arranged in each location pin hole I (5).
Owner:江苏追日汽车同步器有限公司

Separable disc plate with function of cushioning

The invention provides a separable disc plate with a function of cushioning. The separable disc plate comprises a friction plate fixed along the circumference of a disc body of a clutch disc. The separable disc plate may include a plate body which is plate-shaped and fixed to the disc body, and a fixing device formed on the plate body and used for elastically connecting a pair of disc plates in the direction of opposite push of the pair of disc plates facing each other.
Owner:HYUNDAI MOTOR CO LTD +2

Gear shifting and vibration reduction assembly and car gear shifting system

The invention provides a gear shifting and vibration reduction assembly and a car gear shifting system, and relates to the technical field of the car gear shifting system. The gear shifting and vibration reduction assembly comprises a gear shifting arm, a balancing weight structure and a vibration reduction structure; the gear shifting arm and a speed changer are connected through a gear shiftingrod pin; the balancing weight structure is rotationally connected with the gear shifting rod pin; the gear shifting arm and the balancing weight structure are connected through a connector; the gear shifting arm can drive the balancing weight structure through the connector to rotate around the gear shifting rod pin; and the vibration reduction structure is arranged between the connector and the gear shifting arm and / or between the connector and the balancing weight structure. The car gear shifting system at least comprises a gear shifter, a gear shifting flexible shaft, the speed changer andthe gear shifting and vibration reduction assembly; the gear shifting flexible shaft is connected between the gear shifter and the gear shifting arm; and the gear shifting arm is arranged on the speedchanger. The problem that in the prior art, a balancing weight is directly connected with a gear shifting arm, so that vibration is transmitted to a gear shifting handball to easily cause numbness issolved.
Owner:GEELY AUTOMOBILE INST NINGBO CO LTD +1

Transmissions for Hybrid Vehicles

The present invention provides a transmission for a hybrid vehicle, the transmission includes: a primary clutch and a secondary clutch provided on a first input shaft and a second input shaft to selectively transmit power from an engine to an output axis. First and second pairs of engine side gears having different gear ratios mesh with the secondary clutch and output shaft and with the second input shaft and output shaft such that the paired gears are selected. The third input shaft is rotated by power received from the motor. A plurality of pairs of motor-side gears having different transmission ratios are engaged with the third input shaft and the output shaft so that a pair of gears suitable for a vehicle speed is selected by the motor-side engaging / disengaging unit. A one-way clutch allows power to be transferred from the third input shaft to the output shaft only.
Owner:HYUNDAI MOTOR CO LTD

Gear shifting push-pull cable and automobile

PendingCN112112960ACut off the transmission of vibration and noiseImprove shift feelGearing controlPistonVariator
The invention discloses a gear shifting push-pull cable. The gear shifting push-pull cable comprises a mounting framework, pistons and a pull cable; an accommodating cavity is formed in the mounting framework; the pistons are arranged in the accommodating cavity in a sliding mode, and a liquid storage cavity used for accommodating hydraulic oil is isolated in the accommodating cavity; one sectionof pull cable penetrates through the first end of the mounting framework, one end of the pull cable is connected with one, close to the first end, of the multiple pistons, and the other end of the pull cable is used for being connected with a transmission gear-shifting rocker arm; and the other section of pull cable penetrates through the second end of the mounting framework, one end of the pull cable is connected with one, close to the second end, of the multiple pistons, and the other end of the pull cable is used for being connected with a shifter gear-shifting rocker arm. The invention further discloses an automobile which comprises the gear shifting push-pull cable. Movement synchronism of the two sections of pull cables is guaranteed through the hydraulic oil and the pistons in the accommodating cavity, and the situation that a gear cannot be engaged due to asynchronous movement of the two sections of pull cables is avoided; two-way transmission of vibration between a gear shifter and a transmission is achieved; and high-frequency low-pair vibration can be converted into heat energy of the hydraulic oil, so that transmission of vibration and noise is blocked, and the gear shifting hand feeling is optimized.
Owner:GUANGZHOU AUTOMOBILE GROUP CO LTD

Automobile manual transmission suction induction device

The invention discloses an automobile manual transmission suction induction device. A steel sleeve is mounted in an outer shell of a gear shift locating seat. An inner shell is mounted in the steel sleeve. The outer end of the inner shell is provided with a pit. A contact ball is clamped in a bayonet in the pit. Rolling bodies are mounted between the contact ball and the bottom of the pit. A gear shift and gear selection lever is provided with a check block. The groove face of a wavy notch of the check block is matched with the outer arc surface of the contact ball. The automobile manual transmission suction induction device is suitable for various types of manual transmissions, and the number of modified parts is little; by adding the wavy notch to be located with the contact roll, gear shift induction and gear definiteness can be obviously improved; the gear shift balance performance is improved; and meanwhile, the gear suction induction is greatly enhanced, and the operating performance of gear shift is improved.
Owner:JIANGXI CHANGHE AUTO

Hybrid powertrain for vehicles

The invention relates to a hybrid powertrain for vehicles, which may include an engine input shaft connected to an engine by a main clutch, a motor input shaft connected to a motor, first and second output shafts mounted in parallel to the engine input shaft, a variable driving gear provided on the motor input shaft to maintain or increase a rotation speed of the motor input shaft and then to transmit the maintained or increased rotation speed to the first output shaft, a composite synchronizer mounted to independently implement interruption of connection between the engine input shaft and the motor input shaft and interruption of connection between the variable driving gear and the motor input shaft, and plural gear pairs mounted to form different transmission gear ratios between the engine input shaft and the first output shaft and between the engine input shaft and the second output shaft.
Owner:HYUNDAI MOTOR CO LTD +1
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