Abstract: A method for controlling a vehicle on an uphill incline includes automatically shifting a transmission to first gear, automatically stopping the engine, using wheel torque to maintain a one-way clutch engaged and to hold a transmission component against rotation, preventing vehicle rollback by automatically engaging a target gear and tying-up the transmission automatically restarting the engine, and automatically reengaging first gear.

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 system for selecting shift schedules of a transmission of a vehicle includes a controller configured to receive a signal indicative of acceleration of the vehicle prior to a change of a gear of the transmission. The controller is further configured to estimate tractive effort of the vehicle following the change of the gear of the transmission, the tractive effort estimation being based on at least an estimation of a road load on the vehicle. The controller is further configured to select between a first shift schedule and a second shift schedule based on the tractive effort estimation, wherein, if the tractive effort estimation is less than a threshold value, the controller selects the first shift schedule, and if the tractive effort estimation is at least equal to the threshold value, the controller selects the second shift schedule.

Abstract: A pulse signal output unit sends three-phase pulse signals according to movement of the movable member. A counter unit adds a first predetermined value or a second predetermined value to a count value or subtracts the first predetermined value or the second predetermined value from the count value, according to a combination of the pulse signals appearing when all the pulse signals are normal and a combination of the pulse signals appearing when one of the pulse signals malfunctions. A position detection unit detects the position of the movable member according to the count value.

Abstract: An easily adjustable pressure relief valve for adjusting maximum fluid pressure levels in automatic transmissions at events. Engines used in racing and exhibitions require automatic transmissions with increased fluid pressure to prevent slipping during shifts. The pressure relief valve replaces a main mod line solenoid accumulator and includes an easily replaceable spring allowing adjustment of maximum fluid pressure at each event. The relief valve spring is selectable to adjust maximum fluid pressure for each event.

Abstract: A vehicle control system includes: a power unit including an engine and a rotating electrical machine; a power supply apparatus connected to the rotating electrical machine; an oil pump unit including a mechanical oil pump and an electric oil pump for cooling the rotating electrical machine; and a control apparatus. The control apparatus is constituted by an EOP idling determination unit that determines an idling state of the electric oil pump, and an engine starting processing unit that performs processing to drive the mechanical oil pump by starting the engine in accordance with the determination of the EOP idling determination unit.

Abstract: A hybrid drive device includes a speed change mechanism, a motor drivingly coupled to an input shaft, and a clutch interposed between an engine and an input shaft. Upon engine start during engine traveling, the clutch is engaged, and rotation of the engine is increased. A control device of the hybrid drive device includes start upshift control means that, according to the engagement control of the clutch upon engine start, upshifts the speed change mechanism to output inertia torque. Thus, when the engine is started, output torque as the sum of driving torque of the motor and the inertia torque is output to the driving wheel, which reduces hesitation upon engine start.

Abstract: A system and method for shifting a hybrid vehicle is provided which utilizes one or more controllers to release one or more clutches and brakes when a transmission is shifted into neutral or park and then prevents a rotational element from being rotated by controlling an engine and a motor/generator when the transmission is in neutral or park. Accordingly, shift shock or slip is minimized when a transmission is shifted from a park or a neutral to a drive or a reverse, thus improving a shifting feeling and safety of the vehicle.

Abstract: A method and apparatus to control the pickup on an uphill slope of an automotive vehicle provided with an automatic or robotized gearbox provide the definition of a control strategy of the gear box operation, also according to the gradient of the uphill slope, which is preferably calculated based on a longitudinal acceleration value of the automotive vehicle, and based on the altitude at which the automotive vehicle can be found, which is preferably calculated based on a detected atmospheric pressure value. In this way, it is also possible to consider the reduction in the engine torque due to the reduction in the air density with altitude.

Abstract: A control apparatus for a vehicular power transmitting apparatus includes a first valve that controls the supply of hydraulic fluid to a running clutch in connection with the switching of the operating state of a first solenoid valve; a second valve that controls the supply of hydraulic fluid to a lockup clutch in connection with the switching of the operating state of a second solenoid valve; and a linear solenoid valve that selectively controls the apply force of the running clutch and the lockup clutch according to the supply of control pressure to the first valve and the second valve. The control apparatus detects a failure state of a part related to the operation of the power transmitting apparatus by the operating state of the running clutch and the operating state of the lockup clutch.

Abstract: In control apparatus and method for a hybrid vehicle, a line pressure control valve disposed at a downstream side of each of mechanical oil pump (M-O/P) and electrically driven oil pump (S-O/P) to decrease a supplied hydraulic pressure from at least one of the mechanical oil pump and the electrically driven oil pump by opening drain ports thereof in accordance with a control valve command value is provided, the control valve command value is set by adding a predetermined additive correction quantity to a required line pressure set in accordance with operating states of a hydraulic pressure clutch (CL1) and a transmission and the drain ports of the line pressure control valve are controlled to a closure side, during an actuation of the electrically driven oil pump.

Abstract: An ECU executes a program including the steps of changing a target shift stage when a current shift change mode is set to an automatic shift change mode and when a driver has intention to change a shift stage, changing a shift range to an N range when he/she has intention for neutral, maintaining the automatic shift change mode when it is determined that he/she does not have intention for neutral but he/she has intention to switch the shift change mode and when such determination is made for the first time after return from the N range, and switching the shift change mode to a manual shift change mode when such determination is not made for the first time.

Abstract: A method and system are provided for controlling overspeeding of a vehicle carrying an internal combustion engine having one or more exhaust brake devices controllable to apply braking torque to the engine. The system may be operable determine a desired speed of the vehicle, to determine a road speed of the vehicle, and if the road speed of the vehicle exceeds the desired speed of the vehicle by more than a threshold speed, to determine a target brake torque required to reduce the road speed of the vehicle speed to the desired speed of the vehicle, and to then control the one or more exhaust brake devices to apply the target brake torque to the engine to thereby control the road speed of the vehicle to the desired speed of the vehicle.

Abstract: A mobile machine includes a propulsion system. The propulsion system may include a prime mover, a traction device, and a clutch operable to transmit power produced by the prime mover to the traction device. The propulsion system may also include propulsion-system controls operable to control the clutch. The propulsion-system controls may include at least one information processor configured to estimate a temperature of the clutch based at least in part on an estimated slippage of the clutch and a fluid temperature.

Abstract: A method of controlling a transmission brake that is actuated by inlet and outlet valves. For determining when to transmit a disengagement signal for opening the outlet valve, the current input and output speeds are determined and the respective gradients of these speeds are calculated. Variation of the input speed, during the disengagement of the brake, is determined as a function of the input gradient, the optimum time for reaching the synchronous speed, during brake disengagement, is determined from the input speed variation as a function of the output gradient, and the time interval until transmission of the disengagement signal is determined as a function of the current input and output speeds and their gradients, by a back-calculation from the time when the synchronous speed is reached, taking a disengagement dead time of the brake, between transmitting the disengagement signal and start of disengagement, into account.

Abstract: A method for optimizing a shift event in a vehicle includes designating a clutch to be used as an oncoming clutch or an offgoing clutch in the shift event before executing the shift event, and processing a plurality of input values through a state observer to thereby determine, as an output value of the state observer, an estimated slip speed of the designated clutch. The method includes using a proportional-integral control module for the designated clutch (a clutch PI) to close the control loop on the estimated slip speed from the state observer, thereby smoothing a switching between state space equations in the state observer, and executing the shift event. A vehicle includes a transmission, an engine, at least one traction motor, and a control system configured for executing the above method.

Abstract: A gear ratio control unit is provided to set a target gear ratio on the basis of an operating condition of the vehicle. The gear ratio control unit controls a drive amount of a step motor such that an actual gear ratio converges with the target gear ratio, and when a deceleration of the vehicle exceeds a predetermined threshold, controls the gear ratio by controlling the drive amount of the step motor such that a predetermined gear ratio is maintained. The gear ratio control unit determines the predetermined threshold on the basis of the actual gear ratio upon detection of an operation of a brake.

Abstract: A method and system provides a Neutral Tow mode in a vehicle with a shift-by-wire transmission by displaying a Neutral Tow mode option when the transmission control mechanism has been used to select Park, an ignition switch is on, and an engine is off or an information button has been pushed and entering a Neutral Tow mode upon detecting a triggering event. The Neutral Tow mode is canceled upon detecting a certain sequence of events, such as turning on the ignition switch, depressing and holding a brake pedal, and selecting Park. When in Neutral Tow mode the transmission will stay in Neutral, without automatically shifting to Park or using battery power, thereby enabling the vehicle to be towed long distances without draining battery power.

Abstract: A method of operating a transmission having a plurality of gears which can operate in an automatic shifting mode, during which a gear is selected automatically depending on the current driving situation, and also in a manual shifting mode during which a gear is selected depending on a driver's command. When the driver commands a shift, a change takes place from the automatic shifting mode to the manual shifting mode. A specific threshold value of the transmission output speed or an equivalent rotational speed value is associated with each gear and, when the driver commands a downshift, a target gear is determined as a function of the current transmission output speed or the equivalent rotational speed value. The gear selected as the target gear is the gear whose specific threshold value is higher than or equal to the current transmission output speed or the equivalent rotational speed value.

Abstract: A control apparatus and a control method for a vehicular drive apparatus that includes a driving power source, and a power transmission device that transmits power from the driving power source to a drive wheel are provided. It is determined that a malfunction occurs in the power transmission device, when a comparison value remains equal to or above a predetermined value for a predetermined period. The comparison value is obtained by making a comparison between an actual value and a theoretical value that relate to a rotational speed of a predetermined rotational member that constitutes at least a part of the vehicular drive apparatus. The predetermined period is set according to an operating state of the power transmission device. Thus, it is possible to reduce the possibility that it is erroneously determined that a malfunction occurs, and to quickly determine that a malfunction occurs.

Abstract: In a group transmission device comprising a splitter group transmission unit and at least one active actuating unit for introducing an actuating torque into the splitter group transmission unit, an open- and/or closed-loop control unit is provided for adapting the actuating torque introduced into the splitter group transmission unit to at least one synchronized shifting operation to be executed by means of the splitter group transmission unit without synchronizing ring.

Abstract: A powertrain for a vehicle is provided having an engine, a transmission, a torque transfer mechanism, a hydraulic fluid circuit, and a transmission control module. The torque transfer mechanism includes a hydraulic fluid pump and is drivingly connected to an output member of the engine and an output member of the torque transfer mechanism is drivingly connected to the input member of the transmission. The hydraulic fluid circuit has a hydraulic valve in communication with the first fluid port of the hydraulic fluid pump. The transmission control module include a control logic for operating the powertrain during a vehicle launch event.

Abstract: An apparatus for connection to a transmission actuator of an engine transmission includes sensors for sensing transmission shifting positions of a shifting device. An interface transfers the evaluation signals of the sensors to the control electronics of the transmission actuator. The sensors are arranged such that their spacing from the interface (2) is smaller than the spacing between the interface and the sensed shifting device.

Abstract: A voting strategy is used to determine the mode state of a transmission when a vehicle is restarted. A Powertrain Control Module, a Transmission Range Control Module, and a Gear Shift Module communicate through a communication network during execution of the voting strategy. Each module stores a remembered mode state (Normal, Neutral Hold, Neutral Tow, etc.) of the transmission in non-volatile memory. Upon module initialization, the Powertrain Control Module will compare its own remembered mode state of the transmission with the remembered mode state reported by the other two modules. A basic voting strategy is that if two of the three modules report the same remembered mode state then the Powertrain Control Module changes the transmission to that same mode state.

Abstract: A system and method for determining a required throttle position and operating a throttle in the required throttle position to attain a required engine speed for fuel cut acquisition is disclosed. A lock-up clutch may be engaged without a shock if a required engine speed is achieved that corresponds to a current transmission speed. Fuel economy may be increased by cutting fuel to the engine when a lock-up clutch is engaged.

Abstract: A system and method for detecting vehicle movement based on the measurement of the torque value on a vehicle drivetrain is disclosed. The system includes a torque sensor for measuring the torque on a vehicle drivetrain. This measured torque is utilized by a control module, with various other measured vehicle parameters, to determine if the conditions are such that vehicle movement may occur or has already begun. Possible vehicle movement is indicated when either the measured torque value exceeds a threshold value and changes towards zero, or big noise spikes are present in the torque sensor output signal.

Abstract: A control method of an assist pump for automatic transmission of a vehicle is provided with an ISG system. The control method includes executing idle stop and go, detecting present transmission gear shift and operating an assist hydraulic pump at a predetermined standard RPM according to detected present transmission gear shift. The control method may reduce electric power consumption and enhance battery durability and fuel efficiency.

Abstract: In a vehicle driving-force control device, if a primary speed is not lower than or equal to a kick-down allowable speed and an accelerator pedal depression amount is larger than or equal to a kick-down allowable depression amount, a shift control device identifies an intention of acceleration from a driver's accelerator operation and kick down a gear stage to a lower stage, even in a manual shift mode having been selected. In this case, the kick-down allowable speed is set to a different value for each of driving force characteristic modes, and a speed range in which a kick-down operation is allowed to be automatically performed on the basis of the primary speed is set narrower for a driving force characteristic mode having higher responsiveness to an accelerator operation.

Abstract: A method of determining an applied actuation touch point pressure value of a frictionally engaged shift element of a transmission at which transmission, via the shift element, is approximately zero, and an increase in pressure relates to an increase of the power transmission via the shift element. The method includes supplying a predefined pressure to the shift element at which power transmission is zero. Increasing the target pressure by an offset pressure to transfer the shift element into a predefined operating state which initiates time monitoring. Determining a characteristic of the actual pressure. After a testing time, a monitoring period is compared with a reference period. When the monitoring period is less than or equal to the reference period, the applied pressure is set to be equivalent with the target pressure.

Abstract: A vehicle control device having a shift-by-wire system that switches a driving range of a vehicle transmission by inputting a range switching signal to a shift switching device, includes: an abnormality detecting means that detects an abnormality that the shift switching device cannot switch the driving range, of the shift-by-wire system; and a driving force suppressing means that suppresses a driving force of a vehicle when an abnormality is detected in the shift-by-wire system and when a vehicle stop is predicted, and the driving force suppressing means switching a gear stage of the vehicle transmission to a higher-speed gear stage.

Abstract: A method for controlling a transmission gearshift includes engaging control elements whose engagement is required for operation in first gear and reverse gear without grounding the transmission's input, grounding said input provided a range other than park is selected, grounding the transmission's output, releasing the input, producing first gear provided first gear is selected, and producing reverse gear provided reverse gear is selected.

Abstract: A stroke sensor includes conductor pieces 51 to 57 of a detected body 50 two-dimensionally arranged on a lower surface of a slider 41 in a specified pattern. The lower surface of the slider 41 is divided into four regions corresponding to respective detector units 61 to 64 along a Y-direction. The conductor pieces 51 to 57 are arranged over a specified X-direction extent in the respective regions. The arrangement of the conductor pieces 51 to 57 is set such that the combinations of the conductor pieces 51 to 57 detected by the detector units 60 become different in each and every shift range in the X-direction. This makes it possible to consistently specify the shift range based on the combination of the detector units 61 to 64 staying in the detected state.

Abstract: A sport running estimated value LEVELSP obtained by searching a value on a map prepared in advance based on an average values AGYAVE of lateral accelerations GY of a vehicle and on average values of vehicle speed changes is calculated, and a vehicle speed on a shift map is searched based on the sport running estimated value LEVELSP and an estimated value DA of a vehicle gradient, whereby a downshift vehicle speed VA at which a downshift is implemented is calculated. Then, the downshift is implemented in a case where actuation of a brake is detected, deceleration of the vehicle is a predetermined value or more, and a current vehicle speed is a downshift vehicle speed VA or more. In such a way, running on a meandering road, for which the downshift and a subsequent shift hold should be implemented, is sensed appropriately.

Abstract: A control system for a mobile machine is disclosed. The control system may have an engine configured to propel the mobile machine, at least one operator input device configured to indicate a desired engine speed and a desired mode of operation, and a controller in communication with the engine and the at least one operator input device. The controller may be configured to make a comparison of a current torque of the engine to an available torque, and to selectively adjust a speed of the engine from the desired engine speed based on the desired mode of operation and based on the comparison.

Abstract: An electronic-hydraulic controller for an automatic transmission includes a transmission control module (TCM) which is disposed outside the transmission housing and is connected to the actuators, sensors and switches within the transmission by a serial data link such as the car area network (CAN). Electrical power is also provided to the components within the transmission resulting in a connector requiring only five or six terminals. Each of the actuators, sensors and switches includes its own integrated electronic circuitry which receives, stores and provides data and allows it to communicate through the serial data link with the externally mounted control module. The electronic circuitry of each actuator stores data regarding its input signal to output pressure and flow characteristics which facilitates replacement of the transmission control module.

Abstract: A device for determining, when driving a vehicle, a mapping of torque transmitted by a clutch of the automobile based on a position of a clutch control member. The device includes a mechanism updating the mapping based on position thresholds of the clutch control member. The updating modifies values of the thresholds based on minimum and maximum values of the positions of the control member stored in the mapping and on current values of the thresholds.

Abstract: A method of controlling an automatic transmission of a vehicle in which a hold gear function is activated by a driver request and is deactivated depending on a return condition. To allow an effective, safe to operate, and comfortable use, the return condition depends on one of the following criteria or a useful combination of the same: a flexible time span, consideration of the vehicle stand still time; a rotational speed of the vehicle engine, or one or several parameters which correlate with the engine rotational speed, a new, the same, or a different drive request by the driver, a change in the operating condition of the vehicle, and a plausibility check occurring during the startup procedure.

Abstract: A system for controlling a vehicle that controls driving force and braking force such that a vehicle speed is maintained at a target vehicle speed. More specifically, when the vehicle speed exceeds the target vehicle speed, the system for controlling a vehicle maintains the driving force at or above a predetermined value, and applies braking force to the vehicle such that the vehicle speed is maintained at the target vehicle speed. This provides the vehicle with sufficient driving force for uphill driving following the downhill driving, and thus to travel uphill without significant speed loss. In other words, the vehicle ascends the uphill road smoothly at an approximately constant speed.

Abstract: A method for controlling a hybrid powertrain system based upon determined inertial effects for a continuously variable operating range state includes monitoring an operator torque request and a rotational speed of the output member, determining an inertial effect on an input speed of the input member for a continuously variable operating range state, and controlling motor torque outputs from the electric machines to meet the operator torque request based upon the inertial effect on the input speed of the input member.

Abstract: A vehicle includes a clutch set, a tank with fluid, an auxiliary battery, an electric fuel pump, and a controller. The electric fluid pump delivers some of the fluid from the tank to a designated oncoming clutch of the clutch set. The controller calculates a predicted flow value for the oncoming clutch during the shift event, and selectively controls the speed of the pump using the predicted flow value during the shift event. The controller controls the pump using an actual flow value when the vehicle is not executing a shift event, i.e., when holding torque. The speed of the electric fluid pump is increased to a first calculated speed determined using the predicted flow value when the shift event is initiated and before filling of the oncoming clutch commences, and is reduced to a second calculated speed determined using the actual flow value when the shift event is complete.

Abstract: A method for operating a hydraulic system of an automatic transmission, in particular in a hybrid drivetrain, in which the hydraulic system comprises a main pump that is powered by an internal combustion engine and/or an electric drive motor, an electric auxiliary pump and a system pressure valve for setting a system pressure, to ensure various operating functions. In addition to the main pump, the electric auxiliary pump also supplies the hydraulic system with a volume flow of an operating medium. The loading of the electric auxiliary pump is determined in an electronic control unit with regard to the value of the system pressure and the loading of the electric auxiliary pump is limited, by the electronic control unit, with regard to the selected operating function.

Abstract: A vehicle control device includes: an abnormality detecting portion that detects an abnormality in at least part of a shift position detection portion detecting a shift position; a shift-operatoin determining portion that determines, based on a detection signal from the shift position detection portion, whether a shift operating device is shift-operated or not by a driver, and a vehicle movement prevention control portion that, in a case where a movement of a vehicle is prevented by an actuator and in a case where the abnormality in part of the shift position detection portion is detected by the abnormality detecting portion, permits the actuator to release the prevention of the movement of the vehicle if it is determined by the shift-operation determining portion that the shift operating device is shift-operated by the driver.

Abstract: A method and a device are provided for operating a drive unit having an engine and a transmission, which make possible an improved shifting strategy. In a first operating state, the engine is operated using a first number of active cylinders. In a second operating state, the engine is operated using a second number of active cylinders. The first number is different from the second number. A gear ratio is set as a function of at least one operating variable of the drive unit. The gear ratio is also set as a function of the current or the attainable operating state of the engine with respect to the number of the active cylinders.

Abstract: When a read-ahead vehicle speed is calculated using an integrator and a delay element, a predetermined gain used for an integral calculation is made small if a result of the integral calculation greater than a predetermined value based on an actual vehicle speed.

Abstract: In order to suppress the clutch applying shocks at a garage shift time of a continuously variable transmission equipped with a hydraulic type forward-backward switching device, an ECU starts a timer of a predetermined time period, when the engine starts. If the garage shift occurs before a timer-up, the ECU starts a standby oil pressure control to feed the forward-backward switching device with a standby oil pressure lowered to such a level as to leave the forward-backward switching device unapplied. The ECU calculates a first fill hydraulic value in accordance with the time period from the engine start to the garage shift operation. After the time up, the ECU ends the standby oil pressure control, and executes a first fill control at the first fill hydraulic value calculated.

Abstract: A linear solenoid is configured with an electromagnetic coil and a label resistor that are integrated with each other; the label resistor has a resistance value corresponding to a correction coefficient based on the difference between the actual characteristic of the supply current vs. adjusted hydraulic pressure output of the electromagnetic coil and a standard characteristic; and data for correcting a characteristic variation in the command current vs. output current characteristic of an electromagnetic coil is preliminarily stored in a control module by use of an adjustment tool. When the operation is started, the resistance value of the label resistor is read and an output current corresponding to a utilized linear solenoid is supplied, so that a target adjusted hydraulic pressure is obtained.

Abstract: A speed change control system for an industrial vehicle includes: a speed ratio detecting unit that detects a speed ratio of speeds of an input shaft and of an output shaft of a torque converter; a torque converter speed ratio-based speed changer that shifts up or shifts down a speed stage of a transmission 3 in response to the detected speed ratio; a vehicle speed detection unit that detects a speed of the vehicle; a mode selection unit that selects any one of an L-mode and an H-mode; and a speed change control unit that permits an upshift provided that the vehicle speed is equal to or higher than a first predetermined value when the L-mode is selected whereas permits the upshift provided that the vehicle speed is higher than another predetermined value which is larger that the predetermined value when the H-mode is selected.

Abstract: Systems and methods for shift control for vehicular transmission. A transmission may shift gears at designated transmission shift points. When the slope of the road grade encountered by a vehicle changes, the transmission shift points may be altered to provide better vehicle performance. According to one embodiment, road slope may be calculated based upon vehicle acceleration and acceleration caused by pedal depression. In such an embodiment, brake indication may be calculated from the same road slope calculation without the use of a brake signal switch. If brake application is indicated by the road slope calculation, transmission shifting may be adjusted to prevent poor vehicle performance.

Abstract: A method of controlling an automobile clutch in an automated transmission system with a CMPC control is disclosed having application to vehicle clutch control in an AMT system. The driver's request is translated in terms of sliding velocity ?sl. Constraints on the engine and clutch actuators are defined to respect their operating limits, and driving quality constraints are defined to guarantee comfort during the clutch engagement phase. In order to meet these quality constraints, a reference trajectory is defined for ?sl as a function of the clutch engagement time. An analytical expression allowing real-time calculation of a set of control trajectories with a CMPC control law is then defined from the expression of this reference trajectory. The trajectory respecting the constraints on the actuators is selected from among all these control trajectories. Finally, the clutch is controlled with the selected control trajectory.

Abstract: A method of operating of a drivetrain, having at least a drive motor and an automatic transmission with at least five shift elements, to improve a shift speed such that during a first upshift or a first downshift, at least one required shift element is prepared such that, when a synchronization point is reached, the successive upshift or the successive downshift can be immediately carried out. The method comprises the steps of requiring, at most, two of the at least five shift elements be disengaged and a remainder of the shift elements be disengaged for each gear for transferring one of torque and force; and one of increasing and decreasing a torque of the drive motor, relative to a torque of the drive motor derived from a driver's wish, during one of the first upshift or downshift and the successive upshift or downshift to assist with an overlapped implementation of the successive upshifts or the successive downshifts.