Abstract: A method for controlling a clutch assembly includes controlling an actual clutch fill pressure using open-loop pressure controls when an active fill phase is detected, and using closed-loop pressure controls when the active fill phase is complete or when an overfill condition is detected. The method supplies the actual clutch pressure according to a second set of open-loop pressure controls when a step in commanded clutch pressure is detected. The method monitors a fill pressure and time during the step, and applies the clutch pressure according to the closed-loop pressure controls when either value equals a corresponding threshold value. A clutch assembly has a piston for compressing clutch disks to initiate a shift event, an algorithm for controlling the shift event, and a sensor for determining an actual clutch pressure during the shift phases. The algorithm switches between closed-loop and open-loop pressure controls in response to different shift phases.

Abstract: The invention concerns a method for controlling automatic or automated transmission downshift used for power braking and comprising set of predetermined shifting laws, characterized in that it consists, below a certain arbitrary threshold Ethreshold of the accelerator pedal depression, in defining a new downshift law designed to be substituted for the current standard downshift law.

Abstract: A continuously variable transmission is mounted on a vehicle capable of selecting plural drive modes and changes a target engine speed between drive modes. A pulley ratio is controlled by a motor. An ECU for transmission control includes a calculation section which outputs a target engine speed as a function of throttle opening and vehicle speed, and a motor control value determination section which outputs a control value for controlling the motor based on the target engine speed and an actual engine speed. In a case where, when a drive mode is selected, the current target engine speed changes by an amount exceeding a predetermined judgment value according to vehicle speed, the motor control value determination section updates the current target engine speed in a stepwise manner. The resulting configuration reduces a shift shock caused by a drive mode change.

Abstract: A method for controlling the shift sequence of a multispeed automatic gearbox in which, to reach a target gear called for, multiple shifts through one gear-step can be carried out. A target gear from a currently engaged gear is proposed and, which is several gear-steps away from this current gear, is engaged as a function of the current driving situation, optionally by a direct multiple shift in one step or by a combination of several successive single shifts each of only one gear-step or by a combination of several successive double or multiple shifts each of two or more than two gear-steps or by a combination of at least one double or multiple shift and at least one single shift or by a combination of at least one double shift and at least one multiple shift.

Abstract: A power train control device includes a requested torque calculation unit that calculates requested torque for an engine based on a parameter input from an upper level computing device, a transmission gear ratio determination unit that determines a transmission gear ratio, a transmission control unit that calculates output shaft torque and gearshift time of an automatic transmission at the time of gearshift and outputs a control parameter to an automatic transmission control device, a generated driving torque calculation unit that calculates driving torque generated in the power train, taking account of the load torque of the engine input from a load torque computing device, and outputs the calculated driving torque to the upper level computing device, and an availability calculation unit that calculates and outputs availability of the driving torque to the upper level computing device.

Abstract: A control system for regulating operation of a first vehicle system includes first and second sensors that respectively monitor first and second operating parameters of a plurality of operating parameters, and a module that receives signals generated by the first and second sensors. The module accesses a look-up table that is normally provided to determine a first one of the plurality of operating parameters based on a second one of the plurality of operating parameters and an actual value of an input parameter. The module determines a virtual value of the input parameter while the actual value of the input parameter is equal to zero. At least one of the first and second vehicle systems is normally regulated based on the input parameter. The module regulates operation of the first vehicle system based on the virtual value of the input parameter.

Abstract: A control apparatus for a continuously variable transmission of a vehicle is provided for switching the transmission from a continuously variable transmission mode to a stepped transmission mode without giving any discomfort to the driver, and for appropriately responding to a request for acceleration from the operator during the stepped transmission mode. The control apparatus comprises an ECU for setting a target transmission ratio in accordance with the detected operating condition of the vehicle, controlling the transmission ratio of the continuously variable transmission to reach the set target transmission ratio, and switching the transmission mode between a CVT mode and an AT mode. When the transmission mode is switched from the CVT mode to the AT mode, the ECU sets the target transmission ratio to a transmission ratio in the CVT mode immediately before the switching.

Abstract: A continuously variable transmission is provided having a driven element. The continuously variable transmission also has a first operator input device configured to transmit a first displacement signal corresponding to a displacement of the first operator input device. The continuously variable transmission further has a second operator input device configured to transmit a second displacement signal corresponding to a displacement of the second operator input device. In addition, the continuously variable transmission has a third operator input device configured to transmit a transmission operating mode request. Furthermore, the continuously variable transmission has at least one sensor configured to sense at least one parameter indicative of an operating condition of the transmission.

Abstract: A microprocessor driven two dimensional search engine examines transmission operating points within a plurality of search range spaces and assists in determining properties associated with the driveline at various operating points within the space. The size of the space is reduced by rearrangement of data.

Abstract: A powertrain system includes an engine mechanically coupled to an electro-mechanical transmission selectively operative in one of a plurality of transmission operating range states and one of a plurality of engine states. A method for controlling the powertrain system includes determining a current transmission operating range state and engine state, determining at least one potential transmission operating range state and engine state, determining preferability factors associated with the current and potential transmission operating range state and the engine state wherein the preferability factors associated with potential transmission operating range states include transmission input speed trip preferability factors, preferentially weighting the preferability factors for the current transmission operating range state and engine state, and selectively commanding changing the present transmission operating range state and engine state based upon the preferability factors.

Abstract: A method for controlling selection of an automatic transmission gear ratio with staged ratios or constant variation for a vehicle including a control for preventing/allowing extension of the gear ratio or for controlling a shortening the transmission gear ratio if, at a current engine speed, the power is insufficient for maintaining the vehicle speed. The method prevents extension of the transmission gear ratio if the power available after the extension is insufficient for maintaining the vehicle speed; otherwise allowing extension of the transmission gear ratio.

Abstract: A method to monitor integrity of a signal output from an operator-manipulable transmission range selector for a powertrain system includes equipping the transmission range selector with a range encoder and a direction encoder, determining a range state and a direction state based upon signals from the range encoder and the direction encoder, determining a discrete position of the transmission range selector based upon the range state and the direction state, and performing back rationality to verify the discrete position of the transmission range selector.

Abstract: A method and a device are provided for limiting the driving speed of a motor vehicle that allow a selectable, fixed fuel consumption per distance traveled to be maintained without limiting short-term acceleration. In this context, the driving speed is limited to a maximum value (vmaxbe), at which a predefined maximum fuel consumption (Besetpoint) for steady driving speed is not exceeded.

Abstract: A method for configuring an electronic transmission control unit of an automatic transmission in a motor vehicle. Selectable shift programs are offered to a user of the motor vehicle at an input unit for configuring the electronic transmission control unit. From the shift programs offered, the user selects individual shift programs by activation/deactivation and optionally alters shift-program parameters as desired. Based on the shift programs selected in a user-individual manner from the shift programs offered, the electronic transmission control unit is configured in a user-individual manner by signal transmission or via voice input.

Abstract: A work machine gear shifting control system provides gear shifting conditions for an automatic gear shifting mode in accordance with work site conditions. An area 62 of a display device 49 displays a permissible velocity setting range and setup operation guidance, and another area 64 shows guidance to indicate whether the setting is acceptable or unacceptable. When the traveling velocity falls within the permissible velocity setting range, the displayed guidance changes to indicate that the setting is acceptable. When, in this instance, an operator presses a setup switch 23 with desired timing, a transmission gear shifting control section 45 acquires the prevailing vehicle velocity and velocity ratio (or vehicle velocity), and stores adjustment values in an adjustment value storage section 43 so that the vehicle velocity and velocity ratio become the gear shifting control threshold values for normal gear shifting control (steps S535 to S545).

Abstract: A system for determining a gear ratio change in an automatic transmission of a motor vehicle, includes an electronic control unit, a device for acquiring information about a surroundings of the vehicle, a device for acquiring driver data and/or vehicle data, and a correction module connecting the electronic control unit to the transmission. The correction module is connected to the transmission, to the device for acquiring information about the surroundings, and to the device for acquiring driver data and/or vehicle data. In addition, a method for determining a gear ratio change in an automatic transmission of a motor vehicle using the devices of the system is provided.

Abstract: In response to an upshift of a gearshift position SP in a sequential gearshift range, the drive control of the invention once lowers the rotation speed Ne of an engine. This variation in rotation speed of the engine enables the driver to have adequate gear change feeling, which is similar to the familiar gear change feeling in a conventional motor vehicle equipped with a stepped automatic transmission. Namely the drive control of the invention effectively prevents the driver from feeling something is wrong.

Abstract: A variator torque control system and method utilize a hydraulic actuator to control the variator output via a torque control map, wherein the values of the torque control map are evaluated and modified during use of the map to improve map accuracy. In an example, errors in the map are evaluated to determine whether a system fault has occurred.

Abstract: A method for automatically calibrating a transmission of a vehicle using load sensing includes sensing a change in ride height of the vehicle and measuring a magnitude of the change in ride height of the vehicle. The method includes selecting a predefined set of parameters to calibrate the transmission depending on the magnitude of the change in ride height and calibrating the transmission using the selected predefined set of parameters.

Abstract: A continuously variable transmission shift control system includes an input rotational speed monitoring unit that determines whether an actual input rotational speed of the CVT reaches the upper limit of a target input rotational speed, an acceleration request determining unit that determines whether a request for acceleration that is equal to or larger than a predetermined value is made, and a shift control inhibiting unit that inhibits shift control for reducing the target input rotational speed even when the actual input rotational speed reaches the upper limit of the target input rotational speed, in the case where the acceleration request determining unit determines that the request for acceleration that is equal to or larger than the predetermined value is made.

Abstract: A torque request generation system for use with a coordinated torque control system of a vehicle includes an input receiving a vehicle speed and an axle torque command. A datastore records a three-dimensional torque surface defined in terms of a coordinate system having a first axis related to the axle torque command, a second axis related to the vehicle speed, and a third axis related to an axle torque request. A torque request generation module accesses the datastore and generates a torque request based on a correlation between the axle torque command and the vehicle speed respective of the three-dimensional torque surface.

Abstract: A control device for controlling a continuously variable transmission (5) is disclosed. The control device has an oil pressure control unit (100) which supplies an oil pressure to a primary pulley (10) and secondary pulley (11) based on a command signal indicative of a target speed-reduction ratio, a sensor (26) which detects a rotation speed (Np1) of the primary pulley (26), and a controller (20) which transmits the command signal indicative of the target speed-reduction ratio to the oil pressure control unit (100).

Abstract: A method of operating a hybrid transmission includes controlling the transmission according to a drive mode, which includes a continuously variable speed relationship, and controlling the transmission according to a fixed speed relationship mode, which includes a plurality of fixed speed relationships including mechanical gear ratios and virtual gear ratios.

Abstract: A system and method for analyzing and evaluating the performance and attitude of a motor vehicle driver. A raw data stream from a set of vehicle sensors is filtered to eliminate extraneous noise, and then parsed to convert the stream into a string of driving event primitives. The string of driving events is then processed by a pattern-recognition system to derive a sequence of higher-level driving maneuvers. Driving maneuvers include such familiar procedures as lane changing, passing, and turn and brake. Driving events and maneuvers are quantified by parameters developed from the sensor data. The parameters and timing of the maneuvers can be analyzed to determine skill and attitude factors for evaluating the driver's abilities and safety ratings. The rendering of the data into common driving-related concepts allows more accurate and meaningful analysis and evaluation than is possible with ordinary statistical threshold-based analysis.

Abstract: A system and method are disclosed for displaying map information on a portable computing device. When approaching a location at which maneuvering guidance is to be provided by the portable computing device, the portable computing device presents alternating images on a display screen. The alternating images include an overhead view map image and either a perspective view map image or a stylized image. The stylized image can be either a 2D image or a 3D image.

Abstract: What is described is a control system for controlling the coupling between a driveshaft of a motor vehicle propulsion system and a primary input shaft of a gearbox by means of a servo-assisted friction clutch. A control unit receives at its input signals indicating a command imparted by the driver of the motor vehicle by operating the accelerator pedal in a driving-away or gear-changing manoeuvre, and generates—on the basis of a mathematical reference model—reference torque request signals indicating the reference torques requested from the driveshaft and from the friction clutch, the said request signals or data varying in time in such a way as to cause synchronization between the angular velocities of the driveshaft and of the primary gear shaft to be reached at the same moment as the difference between the angular accelerations of the said shafts becomes zero.

Abstract: A servo control device that displays, by a two-dimensional image, evaluation of control precision of a servo system, includes: an instruction unit that instructs a position instruction having periodicity; a unit that records a track of position data based on a position feedback of a servo system according to the position instruction; and a first drawing unit that draws position data based on the position feedback, data before a quarter cycle or after a quarter cycle of the position data or position data based on the position instruction before a quarter cycle or after a quarter cycle, on a two-dimensional plane including orthogonal two axes, as the axis data of the orthogonal two axes respectively.

Abstract: The present invention provides a universal power control module for automatic transmissions. The power control module includes a processor and at least two sensor inputs that convey engine and vehicle data to the processor. This data may include vehicle speed, engine temperature, throttle position, engine RPM, and other operational parameters. Both the type and number of data input to the processor may be changed to accommodate different engine and transmission combinations. At least two outputs convey commands from the processor to the transmission. Program circuitry defines the gear shift pattern of the transmission according to the engine and vehicle sensor data. This program circuitry can be programmed to define an optimal gear shift pattern for any combination of engine and transmission, independent of make and model.

Abstract: When a sport mode shifting request occurs during gear shifting of an automatic transmission according to a vehicle running state, a transmission control unit determines whether or not to accept the sport mode shifting request on the basis of an expected turbine speed at a target speed of currently controlled upshift and an expected turbine speed at a final target speed requested by the sport mode shifting request. By such a scheme, shift shock is reduced and responsiveness is enhanced.

Abstract: A duty jumping amount at an actual shift-begin point (SB point) during static shifting is calculated dependent on an automatic transmission fluid temperature and a turbine torque. Therefore, an adjustment of hydraulic pressure supplied to an on-coming clutch at the SB point is optimized, and thereby a shift feel of an automatic transmission may be improved.

Abstract: Systems and methods for efficiently and effectively controlling the rate of change of ratio, not simply the ratio, in a CVT. By controlling the rate of change of ratio, the acceleration or deceleration of a vehicle can be controlled in an efficient manner. Furthermore, the rate of change of ratio can be controlled by controlling the clamping pressure of the pulleys and/or differential pressure between the pulleys with minimal slip by using a servo control mechanism adapted for control by a system controller based on equilibrium mapping and other control parameters.

Abstract: The proposal is to compare determined measurement values in the form of the actual engagement position to a set engagement speed of the clutch apparatus with a set position and a set engagement speed so that, upon the attainment of a known set-position and the presence of a defined deviation or a trend toward a diversion in the concept of an over-stepping of the set engagement speed, the set engagement speed of the clutch apparatus is braked to a predetermined engagement speed which prevents an undesired engagement impact of the clutch apparatus or at least alleviates an excessive engagement speed.

Abstract: A shift control system for an automatic transmission. The shift control system includes an oil temperature sensor, a hydraulic controller to operate a hydraulic clutch, and a control unit in operative communication with the oil temperature sensor and the hydraulic controller. When a gear shift is requested just after an engine restart, the control unit controls the hydraulic clutch with an adjusted shift control process, in contrast to a normal condition of the engine. This adjustment is determined based on a first oil temperature at a time point when the engine is last stopped and on a temperature difference between the first oil temperature and a second oil temperature at a time point when the engine is last restarted after the last engine stop.

Abstract: A vibration management system for a work machine may include at least one machine component configured to respond to input commands from an operator of the machine. One or more vibration sensors may be configured to output a signal indicative of a vibration level experienced by the operator. A controller may be configured to monitor the output signal from the one or more vibration sensors and determine an average vibration level experienced by the operator. The controller may also be configured to monitor the input commands from the operator and calculate a predicted response of the at least one machine component to at least one of the input commands. The controller may also be configured to determine a predicted vibration effect on the operator based on the predicted response and adjust an actual response of the at least one machine component to the at least one operator input command based on the predicted vibration effect and the average vibration level.

Abstract: A driver-aid method for shifting gears in an automatic transmission, wherein an automatic operating mode of the automatic transmission provides for shifting automatically by means of an optimization strategy based on information signals. Manual shifting of the gears of the vehicle by means of a control device is permitted even in automatic operating mode: a) if the shift requested manually by the driver is compatible with the set optimization strategy, a physical return is transmitted to the driver informing the driver of the compatibility of the shift requested; and b) if the shift requested manually by the driver is not compatible with the set optimization strategy, a physical return is transmitted to the driver informing the driver of the incompatibility of the shift requested.

Abstract: A high acceleration time shift control apparatus and method for a vehicle is provided. The high acceleration time shift control apparatus includes a transmission which achieves plural shift speeds whose gear ratios are different from each other; and a high acceleration time upshifting control device which changes a shift speed of the transmission to a higher speed based on a predetermined determination rotational speed such that an input rotational speed of the transmission substantially reaches a target maximum rotational speed when a request for high acceleration is made by a driver.

Abstract: A control apparatus and method for a vehicle including a stepped automatic transmission and a shift control device which controls an operation of the automatic transmission based on a vehicle state such as a value corresponding to a driving force required for the vehicle, according to a pre-stored shift pattern having a shift line for determining whether shifting is performed from one shift speed to an adjacent shift speed.

Abstract: A gearshift to transmission controller interface is based on a controller area network and a gearshift interface interposed between the gearshift and associated displays and the network bus. The shift controller can be made universal to all transmission types of automated manual transmissions by incorporation of a library program relating to a transmission type.

Abstract: A range selector issues a range selection command signal representative of an operation range of a shift-by-wire type automatic transmission meeting with a driver's intention. The operating range is at least one of P(parking)-range, R(reverse)-range, N(neutral)-range and D(drive)-range. An actuator causes the transmission to assume a certain operation range when receiving an instruction signal. A control unit issues the instruction signal by processing the range selection command signal, so that the transmission is able to assume an operation range that meets with the driver's intention. The control unit is configured to carry out, when the range selector fails to issue the range selection command signal, presuming a range selection intended by the driver based on a previous operation of the range selector; and based on the presumption, causing through the actuator the transmission to actually carry out at least one of first and second range selection operations.

Abstract: A construction machine which is less vulnerable to theft compared with conventional machines is provided. The system includes an antenna (6) for detecting removal of an engine key (8) after the engine has stopped, an angle detector (35) for detecting a posture of the upper structure, and an anti-theft unit (31) for forcing the engine to stop and outputting an alarm signal in cases the upper structure is not in a given posture when parked.

Abstract: When a request to switch to a shift to a new third shift step is made during performing a shift from a first shift step to a second shift step, a method of performing the shift to the third shift step is changed according to an engagement pattern of respective friction engaging components in a steady state of the third shift step. When there are the friction engaging components that are continuously being engaged or disengaged at the time of a shift from the second shift step to the third shift step, the friction engaging components are continuously engaged or disengaged whereas the control of engaging or disengaging the other friction engaging components that are to be changed in the state of engagement or disengagement is started so as to make the other friction engaging components respond to the engagement pattern of the third shift step.

Abstract: A gear ratio selection method for a transmission in a motor vehicle includes detecting a power request, detecting a vehicle speed of the motor vehicle, and providing an engine speed of the motor vehicle. A first desired engine speed is calculated from a first variogram using the power request and the vehicle speed. A second desired engine speed is calculated from a second variogram using the power request and the vehicle speed. A blend factor is determined from the power request, the vehicle speed, and the engine speed. Finally, a blended desired engine speed is calculated from the first desired engine speed, the second desired engine speed, and the blend factor. The blended desired engine speed is used to determine a gear ratio for the continuously variable transmission.

Abstract: A method for modifying a defined adaptive driving strategy, which is stored in the control system for an automatic transmission of a motor vehicle, for adaptation to another type of driver with a different driving style, consists in that the parameters used for the driving strategy are modified by the other driver, the data for this being input to the transmission electronics via an input unit and an interface with the electronics.

Abstract: In control apparatus and method for an automatic transmission, an initial hydraulic reference value is calculated which provides a reference value of an initial hydraulic from a shift kind and a throttle opening angle or from the parameter value corresponding to the throttle opening angle and a correction quantity is calculated for the reference value of the initial hydraulic on the basis of squares of a revolution speed of a piston calculated and of the revolution speed of the piston detected, the initial hydraulic reference value being set to the initial hydraulic during the ordinary gear shift and the initial hydraulic reference value being corrected by a correction quantity to set the corrected initial hydraulic reference value to the initial hydraulic when the gear shift to a predetermined target gear shift stage is carried out at a drive point different from during the ordinary gear shift.

Abstract: A method for automatically controlling the gearbox of a road vehicle uses a computer using information on displacement speed and transversal acceleration of the vehicle and engine load in order to apply various shifting rules according to the road profile. The gearbox computer applies different gear shifting rules according to the value of a coefficient of activity Kbend depending on the displacement speed of the vehicle (V), the lateral acceleration of the vehicle (Gt) and the derivative thereof in relation to time (dGt/dt).

Abstract: A controller-assisted, manually shifted transmission system having a control system and method for controlling automatic range shifts are disclosed. Automatic range shifts are determined by control logic utilizing predetermined logic rules to evaluate transmission system criteria. The control logic determines a set of potential target gear ratios. Engine overspeed tests evaluate the set of potential target gear ratios in combination with the transmission system criteria. The appropriate range shift is determined and executed based on the selected target gear ratio.

Abstract: Parameter values related to hydraulic pressure characteristics of a solenoid valve in an automatic transmission are stored in a memory associated with a transmission main body. When a transmission control unit for controlling the transmission main body is installed to a vehicle, the transmission control unit retrieves the values from the memory and controls a target current of solenoid valve for realization of a target hydraulic pressure based thereon. The association may be achieved by mounting the memory to the transmission.

Abstract: A bicycle shift control device includes a shift signal output unit for outputting shift signals and an inhibiting unit operatively coupled to the shift signal output unit for inhibiting the output of a second shift signal after the output of a first shift signal. In a more specific embodiment, the inhibiting unit inhibits the output of the second shift signal for a predetermined standby time after the output of the first shift signal.

Abstract: A method of controlling an automated transmission of a motor vehicle, wherein the degree of accelerator-pedal depression is expressed as a pedal-depression value and a gear-shifting strategy is determined based on one or more shift characteristics, includes the steps of: determining the pedal-depression value and/or the amount of torque demanded by the driver, evaluating the shift characteristics by taking the pedal-depression value and/or driver-demanded torque into account as input quantities for the evaluation, and determining the gear-shifting strategy based on the evaluation.

Abstract: A system for enhanced ratio control in a continuously variable transmission (CVT) includes a ratio control element positionable by an actuator in response to an actuator command to establish various CVT ratios in the CVT. At least one sensor generates a train of pulses indicative of speed of rotation of a predetermined rotary member of the CVT. A measured CVT ratio generator derives information of an actual CVT ratio out of at least the train of pulses to give a measured value of CVT ratio. A filter processes the measured value of CVT ratio in a manner to refine the information of the actual CVT ratio to give an estimated value of CVT ratio. A command generator determines the actuator command such that the actuator command remains unaltered when a deviation of the estimated value of CVT ratio from a desired value of CVT ratio stays within a dead zone.