Abstract: The operation of a vehicle is controllable and/or regulatable by specifying a driver request describing a setpoint rotational speed or a setpoint torque via an accelerator pedal, detecting the instantaneous position of the accelerator pedal and controlling and/or regulating the internal combustion engine such that the setpoint rotational speed or the setpoint torque is achievable. To provide for a sustained-action brake to be more easily operated in the vehicle, and to increase the vehicle's range of use, one of multiple possible braking actions of the vehicle is specified by selecting a determined position of the accelerator pedal. As a function of an instantaneously detected position of the accelerator pedal, the operation of the vehicle is controlled and/or regulated such that the braking power specified via the accelerator pedal is achieved.

Abstract: When releasing a parking lock of an automatic transmission, an apparatus for facilitating release of the parking lock executes a routine to apply torque to a parking gear in a direction that will reduce an applied load between the parking gear and a parking pole while movement of a driving wheel is in a restricted state, and to reduce the restricting force on the driving wheel until the parking gear is rotated by the torque.

Abstract: The present invention provides a drive device for a working vehicle whereby gear change shock during the forward/reverse running changeover action can be reduced while achieving shortening of cycle time and protecting various clutch mechanisms in the transmission. If a reverse running command is output from a running control device while the vehicle is running forward, an ECMV controls a braking force of a brake device so as to reduce a vehicle speed through a first prescribed speed to a second prescribed speed, and disengages the forward clutch. When the vehicle speed reaches the first prescribed speed, the ECMV puts the reverse clutch in a slipping action condition and, after the vehicle speed reaches the second prescribed speed, gradually engages the reverse clutch.

Abstract: In a driving condition control system, a sensing unit is configured to sense a first physical quantity indicative of a rotation of the first rotatable axle assembly and a second physical quantity indicative of a rotation of the second rotatable axle assembly. A correcting unit is configured to correct the torque according to the sensed first and second physical quantities of the rotations of the first and second rotational axle assemblies. This allows the torque to be precisely obtained.

Abstract: The invention relates to a method for controlling and/or regulating a drive train in a vehicle with an engine and a gearbox, especially an automatic gearbox, whereby depending on a warning signal and a stopping request of the driver an engine stalling aid is launched. The invention also relates to a drive train for a vehicle with an engine and a gearbox, especially an automatic gearbox, especially for carrying out said method.

Abstract: A brake transmission shift interlock actuator includes a bobbin that has an open end and a closed end. A plunger is slidably disposed within the bobbin and a plunger rod extends from the plunger. Moreover, a primary plate is installed within the open end of the bobbin. The plunger is movable between an unlocked position, wherein the plunger rod does not extend through the primary plate and a locked position, wherein a first end of the plunger rod extends through a bore formed by the primary plate. Further, a magnetic force of attraction between the plunger and the primary plate diminishes as the plunger approaches the primary plate.

Abstract: The present invention provides a running control device for an industrial vehicle that has superior driving operability and that allows easy starting and stopping on road surfaces that have sloped or stepped surface. The running control device for an industrial vehicle includes an engine, a sensor that detects an operation amount of an accelerator member, a transmission that has a forward clutch and reverse clutch, a brake that applies braking to the vehicle, and a controller. The controller simultaneously controls the engine revolutions, the engaging force of the forward clutch and reverse clutch and the braking force of the brake in accordance with the operation amount.

Abstract: A method and a device for stabilizing a vehicle having an engine and an automatic transmission for driving drive wheels of a first axle, the transmission having a free-wheeling position for interrupting the force flux between the drive wheels and the engine, and having rotation-sensing wheel sensors on the drive wheels and on wheels of a second axle of the vehicle. The device has gear shift means for shifting the transmission into the free-wheeling position when it is determined, using at least one of the rotation-sensing wheel sensors, that at least one wheel of the second axle is locked or is expected to lock.

Abstract: An engine deceleration control system for an internal combustion engine of a vehicle is arranged to prohibit correcting an air quantity supplied to the engine when an elapsed time period from a moment of turning off of an accelerator of the engine is within a first predetermined time period, or when an elapsed time period from a moment of turning off of a lockup clutch of a torque converter is within a second predetermined time period or when a shifting of a transmission connected to the engine is being executed, and to cancel prohibiting the correction of the supplied air quantity when a braking operation is executed.

Abstract: An automatic gear shifting device for a vehicle comprises a member coupled to a portion of a surface of the vehicle. An arm is pivotally coupled to a portion of the member. The arm is coupled to at least at least one actuator for providing reciprocating motion of the arm. A neutral gear positioning actuator is activated when a brake pedal of the vehicle is engaged, and a drive gear positioning actuator is activated when the brake pedal is disengaged. The arm is coupled to a transmission linkage shaft to provide shifting from drive gear to neutral gear when the brake pedal is engaged and shifting from neutral gear to drive gear when the brake is disengaged.

Abstract: Method and apparatus for reversing the driving direction of a vehicle in motion, in which a movement of a gear selector to a position that indicates the new intended driving direction is detected, and the vehicle's driving brakes are applied depending upon the depression of the vehicle's gas pedal.

Abstract: Methods and apparatus are provided for determining when vehicle powertrain torque is being used to substantially maintain a vehicle at a substantially zero speed on a graded surface, and to shift the supplied torque from the powertrain to another vehicle system or component. A vehicle controller determines that the powertrain system is supplying a hold torque, which has a magnitude sufficient to substantially maintain the vehicle at a substantially zero speed on the graded surface. A brake torque at a magnitude at least equivalent to the hold torque is automatically applied from the vehicle brake system to thereby maintain the vehicle at the substantially zero speed. Thus, the powertrain system can remove the torque it is supplying to hold the vehicle at the substantially zero speed.

Abstract: The invention relates to a parking brake system for transmissions of motor vehicle, especially for an automatic transmission and an automated selector transmission, having one parking brake for blocking or releasing the transmission according to actuation signals of a control device, especially by a pawl engaging and disengaging in a parking brake gear connected with the output of the transmission, an electric operative connection between the control device in the interior of the motor vehicle and the parking brake, a spring accumulator (9) for actuating the parking brake and a pressure-controlled release device of the parking brake. It is proposed to load the release device (10) when releasing the parking brake with a negative pressure independent of the transmission and which is preferably taken from the suction system (15) of the internal combustion engine of the motor vehicle or from a negative pressure brake force booster of the motor vehicle.

Abstract: An engagement force for engaging a first friction engagement element is set to be lower than an engagement force for establishing a predetermined shift stage with a second friction engagement element being engaged when a vehicle is stopped with an acceleration pedal not being operated and a brake pedal being operated under a forward driving range in an automatic transmission. The engagement force for the first friction engagement element is increased when a vehicle starts with the brake pedal released from the operated condition, and the engagement force for engaging the second friction engagement element is decreased when a relative rotational speed between a turbine wheel and a forward movement member becomes equal to or smaller than a predetermined rotational speed.

Abstract: In a driving condition control system, a sensing unit is configured to sense a first physical quantity indicative of a rotation of the first rotatable axle assembly and a second physical quantity indicative of a rotation of the second rotatable axle assembly. A correcting unit is configured to correct the torque according to the sensed first and second physical quantities of the rotations of the first and second rotational axle assemblies. This allows the torque to be precisely obtained.

Abstract: The invention relates to a method for controlling an internal combustion engine, in which a normal state (A) is exited by switching off the engine (state B) if a standstill of the vehicle is detected (STOP_COND), and in which the engine is restarted when specific conditions (START_COND) apply. When a stop-and-go situation (SS_DISABLE) applies (state A′), this stop/start function is suppressed. Here, for example, repeated activation of the brakes, the engagement of specific gears and/or the spatial location of the motor vehicle may indicate that the vehicle is in a stop-and-go situation in which only brief, uneconomic switching off of the engine is probable.

Abstract: A system for a motor vehicle has a motor vehicle gearbox by means of which a reversal of the direction of travel can be initiated, a vehicle brake unit which is separate from the motor vehicle gearbox, and a control unit. When there is a reversal of the direction of travel from at least one first direction into a second direction when there is still a positive vehicle velocity in the first direction, the control unit generates a braking torque which reduces the vehicle velocity, by means of an actuation unit and by means of the vehicle brake unit. The actual direction of travel of the motor vehicle is determined here by means of a sensor unit.

Abstract: A device for controlling an electrically-operated holding magnet of a parking lock of a motor vehicle transmission in which a holding magnet supplied with power via a transmission control resettable to a basic setting holds the parking lock in the disengaged state, an apparatus for bridging a reset of the transmission control that maintains the power supply of the holding magnet during the reset being provided.

Abstract: Method and apparatus for reversing the driving direction of a vehicle in motion, in which a movement of a gear selector to a position that indicates the new intended driving direction is detected (12). After the gear selector has assumed the new driving direction position, the vehicle's driving brakes are applied (14) depending upon the depression of the vehicle's gas pedal. The driving brakes (10) are applied proportionally to a change in position of the gas pedal. A speed of the engine (1) of the vehicle is increased with increased depression of the gas pedal. A gearbox (2) of the vehicle is disconnected (13) from the vehicle's engine (1) when the gear selector is detected to have been moved to the reverse driving direction position. A change (15) in the gearbox is effected from the current gear position to a position that indicates the selected gear for driving in the reverse direction after disconnection (13) of the vehicle's gearbox (2) from the vehicle's engine (1).

Abstract: In a method for operating a motor vehicle having an automatic transmission in the time of a selection action for a driving-mode range, first a driver's requirement for a change in the driving-mode range is transferred to a selection device, a change signal is then generated by the selection device, the change signal is subsequently transferred to a control unit, and, finally, a change in the driving-mode range of the automatic transmission is brought about by the control unit according to the change signal. In the time of the selection action for the driving-mode range, at least one braking device is actuated in an automated manner by the or a control unit. Drive-train oscillations may be reduced or avoided by the method.

Abstract: There are arranged an engine 10 having idle-stop control means and an automatic transmission 20 having as a hydraulic-pressure supply source a main pump 22 driven by the engine 10 to perform speed change control. There are arranged a bypass hydraulic passage 45 for ensuring communication between said main pump 22 and a point immediately before an engagement-pressure supply port of a forward engagement element L/C in the automatic transmission, a switching valve 44 on the bypass hydraulic passage 45 for allowing switching between the communicating state and the non-communicating state, and switching-valve control means for switching the switching valve 44 between the communicating state and the non-communicating state. With this, the main pump is stopped at idle-stop control to supply the hydraulic pressure required for restart, allowing smooth running.

Abstract: A vehicle auxiliary braking system is provided to accomplish a braking effect similar to engine braking inexpensively, to extend the life of the brakes, and to reduce the work cycle time in order to improve work efficiency. The system has a centrifugal sensor 20, an accelerator sensor 21, and a braking clutch engaging means that includes a braking hydraulic circuit 22. The centrifugal sensor 20 detects that the vehicle is traveling when the vehicle is moving at or above a prescribed speed. Accelerator sensor 21 detects when the depression amount of the accelerator pedal 6 is at or below a prescribed amount. The braking clutch engaging means engages the clutch that corresponds to the opposite travel direction when the vehicle is traveling at or above the prescribed speed and the accelerator depression amount is at or below the prescribed depression amount.

Abstract: A hydraulic control apparatus for a hybrid vehicle, which enables a smooth torque transmission when an engine of the vehicle is started from an idling stop state. The hydraulic control apparatus includes an engine and a motor as power sources, a transmission having a torque converter a clutch for a starting gear, an engine automatic stop and start device which is associated with the engine, a motor-driven oil pump for supplying oil pressure to the transmission, a brake pedal sensor, an accelerator pedal sensor, an engine revolution rate sensor. The oil pressure applied to the clutch is controlled to a level corresponding to a creeping torque when the engine is automatically stopped. When the brake pedal is released, the engine is automatically started, the accelerator pedal is not depressed, and the engine revolution rate is less than an idling revolution rate, the oil pressure applied to the clutch is maintained to the level corresponding to the creeping torque.

Abstract: The brake system comprises a braking gear(20) for supplying braking force to an output shaft(14), a first braking member(30) for braking the braking gear(20), an operating means(40) for operating the first braking member(30) and a third braking member(16A) for braking a speed change gear(16) selectively, and a controlling means(50) for controlling the operating means(40). The braking gear(20) meshes continuously with a driving gear(15) and is coaxially aligned with the output shaft (14). The first braking member(30) brakes the braking gear(20) to connect or disconnect the supply of power from a driving shaft(13) to the braking gear(20). The controlling means(50) receives a braking signal generated by a braking treadle (60) and controls the operating means(40) in order to disconnect the supply of power from the driving shaft(30) to the speed change gear(16) and brake the braking gear by an operation of the first braking member(30).

Abstract: A method for controlling shifts of an auto vehicle transmission is disclosed to determine a forward running shifting process and then perform forward running operations if a range switch of the shift lever is made according to a backward running vehicle driver's intention to run forwards, after the driver considers brake pedal manipulation, the engine idle and vehicle's backward running speed at the time of a R→D range switch of the shift lever, thereby preventing the changing shift shock and reduction in strength that may be caused by wear or loss of friction elements, the method including the steps of: discriminating whether a R→D range switch signal has been input while the vehicle is running backwards; detecting the vehicle's running state if the R→D range switch signal has been input; discriminating whether the first speed shifting conditions are satisfied when the detected running states of the vehicle have been determined as follows: a brake switch is turned off, and the r

Abstract: An engagement force for engaging a first friction engagement element is set to be lower than an engagement force for establishing a predetermined shift stage with a second friction engagement element being engaged when a vehicle is stopped with an acceleration pedal not being operated and a brake pedal being operated under a forward driving range in an automatic transmission. The engagement force for the first friction engagement element is increased when a vehicle starts with the brake pedal released from the operated condition, and the engagement force for engaging the second friction engagement element is decreased when a relative rotational speed between a turbine wheel and a forward movement member becomes equal to or smaller than a predetermined rotational speed.

Abstract: An apparatus includes a linear solenoid valve regulating an oil pressure supplied to a clutch, a hydraulic switch being switched on and off upon receipt of a switching oil pressure, and a control unit controlling the actuation of the solenoid valve. A pressure-increased side signal oil pressure is detected which results when the hydraulic switch is switched on and off while a control signal is sent to the solenoid valve to increase a control oil pressure from a predetermined lower pressure to a predetermined higher pressure, and a pressure-decreased side signal oil pressure is detected which results when the hydraulic switch is switched on and off while the control signal is sent to decrease the control oil pressure from the predetermined higher pressure to the predetermined lower pressure. When a difference between these signal oil pressures exceeds an abnormalities determination value, it is determined that the solenoid valve is abnormal.

Abstract: In braking/driving force controlling apparatus and method for an automotive vehicle, a state discriminating section discriminates between a parking state in which a manipulation for the vehicle to be parked is carried out and a non-parking state in which no manipulation for the vehicle to be parked is carried out, a controller detects a manipulated variable of a manual input section, generates a constant target vehicle speed corresponding to the detected manipulated variable in a case where the state discriminating section discriminates the parking state, calculates a vehicular braking/driving force for a present vehicle speed to become the target vehicle speed, and controls the vehicular braking/driving force on the basis of the calculated braking/driving force.

Abstract: An input device having keys for selecting rearward driving (R), neutral position (N) and forward driving (D), as well as a decrementing control switch (5) and incrementing control switch (4) for manually lowering and raising the gear stage. Starting from the gearbox mode of the input device and the forward driving (ASM) operating state, a tempomat mode (TM) can be adopted by actuating the key (D). The actuation of the operating elements is interpreted in the tempomat mode as a command for the tempomat, it being possible, in particular, for the decrementing and incrementing control switches (4, 5) to be used for lowering or raising the desired speed. A return to the gearbox mode takes place through renewed actuation of the “D” key or actuation of the brake (6).

Abstract: There are arranged an engine 10 having idle-stop control means and an automatic transmission 20 having as a hydraulic-pressure supply source a main pump 22 driven by the engine 10 to perform speed change control. There are arranged a bypass hydraulic passage 45 for ensuring communication between said main pump 22 and a point immediately before an engagement-pressure supply port of a forward engagement element L/C in the automatic transmission, a switching valve 44 on the bypass hydraulic passage 45 for allowing switching between the communicating state and the non-communicating state, and switching-valve control means for switching the switching valve 44 between the communicating state and the non-communicating state. With this, the main pump is stopped at idle-stop control to supply the hydraulic pressure required for restart, allowing smooth running.

Abstract: The invention relates to a method for controlling an internal combustion engine, in which a normal state (A) is exited by switching off the engine (state B) if a standstill of the vehicle is detected (STOP_COND), and in which the engine is restarted when specific conditions (START_COND) apply. When a stop-and-go situation (SS_DISABLE) applies (state A′), this stop/start function is suppressed. Here, for example, repeated activation of the brakes, the engagement of specific gears and/or the spatial location of the motor vehicle may indicate that the vehicle is in a stop-and-go situation in which only brief, uneconomic switching off of the engine is probable.

Abstract: A control strategy and method for controlling friction element engagement and disengagement time for an automatic transmission when the transmission is operating at cold ambient temperatures. During drive-to-reverse or reverse-to-drive friction element engagements with power on, the strategy compensates for a tendency of an oncoming friction element to gain capacity before an off-going clutch loses capacity, thereby avoiding a potential friction element tie-up condition when the transmission is operated with intermediate or high levels of engine torque as the friction elements are sequentially engaged and disengaged during cold rock cycling.

Abstract: A control system (a control valve CV and an electronic control unit ECU) for an automatic transmission TM performs an automatic control to select and establish a speed ratio from a plurality of speed ratios in response to the condition of a vehicle which is set in a drive range. This control system creates a neutral condition if the vehicle is stationary with the brake of the vehicle being actuated and the accelerator for the engine being turned off while the transmission is set in a drive range. The control system is also equipped with an engine output control device 50 that adjusts the engine output which is input into the transmission when the transmission in the drive range leaves the neutral condition and starts to establish any of the speed ratios in the drive range.

Abstract: A method to prevent overspeed of an internal combustion and attached ancillary devices in a mechanized vehicle includes one or more procedures to prevent improper gear selection to disengage the lockup function of a torque converter, to initiate engine braking and to destroke variable displacement hydraulic pumps. Requested gear selection in downshift is allowed only after interrogation of brake pressure, ground speed, shift selection requested and torque converter output speed. The torque converter lock-up solenoid is activated or deactivated in response to torque converter output speed which is compared to selected values to engage or disengage. Engine braking using a compression release braking system response to engine RPM in manual or automatic mode to prevent overspeed. Variable displacement pumps are destroked in response to engine RPM by adjusting swashplate control.

Abstract: A control system 32 and method for controlling neutral idle operation of a vehicle 10 is provided. The method includes measuring a brake pressure in a brake control line of vehicle 10. The control line communicates fluid to a brake 128 coupled to a wheel of vehicle 10. The method further includes determining an incline angle of vehicle 10. The method further includes determining a desired brake pressure based on the incline angle. The desired brake pressure is a pressure sufficient to allow the vehicle brakes to maintain vehicle 10 at a predetermined position. Finally, the method includes disengaging a transmission clutch 46 torsionally coupling a vehicle engine 12 to a wheel 24 when the measured brake pressure is greater than the desired brake pressure to initiate neutral idle operation.

Abstract: The invention relates to the further development of an input device (1) for operating an automatic gearbox, the input device having keys for selecting rearward driving (R), neutral position (N) and forward driving (D), as well as a decrementing control switch (5) and incrementing control switch (4) for manually lowering and raising the gear stage. Starting from the gearbox mode of the input device and the forward driving (ASM) operating state, a tempomat mode (TM) can be adopted by actuating the key (D). The actuation of the operating elements is interpreted in the tempomat mode as a command for the tempomat, it being possible, in particular, for the decrementing and incrementing control switches (4, 5) to be used for lowering or raising the desired speed. A return to the gearbox mode takes place through renewed actuation of the “D” key or actuation of the brake (6).

Abstract: A motor vehicle transmission system blocks the disengagement of the clutch (14) and the shifting of the transmission (12) into neutral for starting the engine (10), if the transmission is already in gear at the time the system is switched on. The blocking is canceled if the main brake (58) is applied and the application of the brake (58) is confirmed by a brake sensor (56), or if the driver moves a shifter element (24) from a non-neutral shift-gate position to the neutral shift-gate position after the system has been turned on.

Abstract: A shift control system for an automatic transmission which has a gear ratio control means for controlling gear ratio of the automatic transmission comprises a lower limit setting device provided in said gear ratio control means and setting a lower limit for inhibiting a gear ratio from changing to a gear ratio of an upshift side; and a lower limit variable control means in which a lower limit of said gear ratio can be changed to a downshift side or to an upshift side by an operation of a driver.

Abstract: A control system and a control method for an internal combustion engine employs an electronic control unit (ECU) in the internal combustion engine to control an output torque of the engine. The ECU anticipates that a driver will make an engine output torque change request based on an operation of an automatic transmission performed by the driver, a brake pedal operation performed by the driver, a vehicle speed detected by a vehicle speed sensor and other information, and changes in advance an amount of engine intake air, a throttle valve opening, an engine speed and other engine operating parameters that determine the engine output according to the engine output change request made by the driver. This allows even an engine operating parameter that is slow to change to be changed to a value close to that after the engine output torque has been changed.

Abstract: A driving force control unit for a vehicle, which allows transmission of driving force from a motor to driving wheels irrespective of releasing an accelerator pedal under or equal to a certain vehicle speed when a transmission is selected to a driving range, and switches driving force to be transmitted to the driving wheels between a strong condition and a weak condition in accordance with depression of a brake pedal such that when the brake pedal is depressed, driving force is controlled to be less than the driving force upon releasing the brake pedal, wherein switching operation of the driving force from the strong condition to the weak condition is not carried out while the vehicle stops.

Abstract: A control system, which creates a neutral condition if a vehicle is stationary with the brake of the vehicle being actuated and the accelerator for the engine being turned off while the transmission is set in a drive range, is equipped with a brake switch 36, which detects the operational condition of the brake, and a output rotation sensor 40, which detects the rotational speed of the output member of the transmission. If the control system detects the rotation of the output member by the output rotation sensor 40, then the control system terminates the neutral condition in spite of the operational condition of the brake, which is detected by the brake switch 36.

Abstract: A control system (a control valve CV and an electronic control unit ECU) for an automatic transmission TM performs an automatic control to select and establish a speed ratio from a plurality of speed ratios in response to the condition of a vehicle which is set in a drive range. This control system creates a neutral condition if the vehicle is stationary with the brake of the vehicle being actuated and the accelerator for the engine being turned off while the transmission is set in a drive range. The control system is also equipped with an engine output control device 50 that adjusts the engine output which is input into the transmission when the transmission in the drive range leaves the neutral condition and starts to establish any of the speed ratios in the drive range.

Abstract: A vehicle transmission (302) is equipped with an actuator (303) for shifting the transmission and a controller (306) for issuing a command to the actuator (303) to control a shifting operation of the transmission (302). A vehicle speed sensor (305) detects a speed of a vehicle, and a gear position sensor detects a current gear position of the transmission (302). The controller (306) stores at least two start gears higher a lowest gear of the transmission beforehand, and selects one start gear when starting a vehicle. The controller (306) selects the start gear based on whether the vehicle tows another vehicle or not.

Abstract: A regulating device is for a primary braking system in the drive train of a vehicle, especially a primary retarder in a vehicle. The device includes at least one control/regulator unit, a device for detecting gear shifts transmitting at least one measuring signal, and at least one actuator enabling the braking moment of the primary braking system to be adjusted. The regulating device is characterized in that the at least one control/regulator unit controls the at least one actuator in order to adjust the braking moment of the primary braking system according to the measuring signal or measuring signals in such a way that the braking moment of the primary brake is reduced for the entire duration of a gear shift.

Abstract: An automatic control for operating an engine retarder, service brakes, and an automatic transmission associated with earth moving equipment is provided. The automatic control monitors engine speed and responsively produces control signals to maintain engine speed within predetermined limits.

Abstract: An exhaust brake control system for a vehicle drive train having an internal combustion engine with an exhaust system includes an exhaust brake valve in the exhaust system. Further, a controller controls the exhaust brake valve through a number of position commands from fully open to fully closed. Inputs to the controller affecting its operation include a speed sensor, a drive coupling sensor, a gear selection sensor, an overdrive gear sensor, an engine speed sensor, a throttle sensor, a pressure sensor and a warm-up sensor. A user interface both receives and sends information from and to the controller. The exhaust brake control system not only includes modulation of the exhaust brake, but also provides for control of a torque converter clutch, automatic transmission and overdrive. With throttled engines the intake throttle valve can be opened and the fuel supply disabled. Modulation of the exhaust brake valve is responsive to speed and acceleration.

Abstract: A control system/method for controlling inertia brake (19) operation in an automated mechanical transmission system (10) shifted without disengaging the master clutch (16). A value representing inertia brake temperature (T.sub.SIM) is simulated and compared to reference values to determine if inertia brake operation is allowable.

Abstract: A throttle controller is provided so as to reduce a load imposed on the drive and transmission system in the stall state in which both the accelerator and brake are depressed.

Abstract: A system for regulating a retarder, in particular a primary retarder in a vehicle, includes at least one control-regulator unit, a device for picking up measuring signals in order to detect gear speed settings, and at least one actuator for setting the retarder braking movement. The regulating system is characterized in that, on the basis of the measuring signals for detecting gear changes, the at least one control-regulator unit controls the at least one actuator for setting the retarder braking moment, such that the braking moment of the retarder does not exceed the maximum permissible braking moment (M.sub.maxR or M.sub.maxHA) for a given driving speed.

Abstract: A system and method for decreasing the time required to complete a ratio change in an electronically enhanced powertrain system is provided. The powertrain system includes a number of devices for providing a retarding torque to engine rotation to increase the decay rate of the engine speed during an upshift. These devices include an engine brake and an input shaft brake. A retarding torque is also provided by increasing engine accessory load by controlling various engine accessories such as a cooling fan, an air compressor, a hydraulic pump, an air conditioning compressor, and an alternator.