Volvo Lastvagnar Ab

Volvo Truck Corporation

Volvo Lastvagnor Ab

Erik Lauri

Svante Karlsson

Marcus Steen

Helene Panagopoulos

Anders Eriksson

Lars Karlsson

Fredrik Karpenman

Mattias Åsbogård

Henrik Ryberg

Tobias Husberg

Patrice Keghelian

Mattias Andreasson

Jonas Jerrelind

Andreas Carlén

Gabriel Napadow

Henrik Olsson

The present invention relates to a controlling apparatus for a powertrain of an electric vehicle, wherein the electric vehicle comprises a gearbox having an input shaft, a first electric machine and a second electric machine being coupled to the input shaft of the gearbox. The controlling apparatus is configured to control the operation of the first and second electric machines by the steps of:

Controlling apparatus for a powertrain of an electric vehicle

A computer-implemented method for clutch start control of an internal combustion engine, ICE, in a vehicle is described. When the vehicle is travelling on a road with the ICE being shut off, topographic data representative of the topography of an upcoming road segment is acquired. A driving scenario for at least a part of the upcoming road segment is predicted based on the acquired topographic data. A gear is selected based on the predicted driving scenario. The ICE is started on the selected gear before or when the vehicle reaches said part of the road segment.

Computer-implemented method for clutch start control of an internal combustion engine in a vehicle

The invention relates to a drive arrangement for a vehicle and a method for gear shifting in a vehicle. The drive arrangement () comprises at least a first drive axle () operatively connected to a first gear box () and a first propulsion unit (). The drive arrangement () further comprises a second gear box () and a second propulsion unit () operatively connected to the first drive axle () or to an optional second drive axle (). The drive arrangement () further comprises at least one electronic control unit (ECU) adapted to govern gear transmission of the first and the second gear boxes (). The electronic control unit (ECU) is configured to automatically select between shifting gear on the first and the second gear boxes () simultaneously, or sequentially. The drive arrangement and the method provides for a very versatile drive arrangement and gear synchronization providing comfort for the driver and the passengers as well as improved vehicle dynamics.

Device and a method for gear shift coordination

A method for controlling a hybrid vehicle propulsion system that includes an internal combustion engine and an exhaust after treatment device for treating exhaust gases from the engine includes determining during operation of the vehicle a value of a parameter indicative of an efficiency of the exhaust after treatment device, identifying a vehicle operation cycle start event, determining during the operation of the vehicle an engine operation history characteristic for a time interval after the vehicle operation cycle start event, and determining whether or not to control the propulsion system so as to increase the efficiency of the exhaust after treatment device, in dependence on the determined exhaust after treatment device efficiency parameter value and the determined engine operation history characteristic.

Method for operating a hybrid vehicle

A method for controlling clutch disengagement in a vehicle having an automated manual transmission including an electronically controlled clutch includes 1. sensing at least two brake pedal positions separated in time, 2. performing a differentiation of the sensed brake pedal positions, 3. comparing the result of the differentiation to a first predetermined threshold value, and 4. controlling the clutch to disengage if the result of the differentiation represents a faster brake pedal application than a predetermined threshold value.

Method for clutch disengagement by comparing brake pedal positions

In a method and a control unit for controlling the position of an automatic disc clutch in a vehicle, which disc clutch is arranged to transmit motive force from an internal combustion engine to an input shaft of a stagegeared gearbox in the vehicle, the control unit is arranged to position the clutch in a first position, preparing the vehicle for take off, with the gearbox having a starting gear engaged, and where the clutch in the first position transmits a smaller torque, characterized in that the control unit being further arranged to position the clutch in a second more disengaged position compared to the first position, if a driver of the vehicle does not demand vehicle take off torque by activating a throttle control within a predetermined time.

Method and a device for controlling a disc clutch

A method for operating a semi-automatic or automatic mechanical transmission of a heavy truck when driving at idle speed is provided. The method includes supplying fuel to the engine of the heavy truck at a rate that facilitates engine-idle operation. In another step, the method engages the automatic or semi-automatic transmission in a gear higher than the starting gear of the transmission and permits the truck to operate at a first substantially uniform driving velocity under engine-idle power. Depending upon traffic and environmental requirements which require a higher speed, the driver upshifts the semi-automatic or automatic transmission by depressing a control device for manual gear selection arranged on a gear shift lever of the truck and then drives the truck at a second substantially uniform driving velocity under engine-idle power. The second substantially uniform driving velocity is greater than the first substantially uniform driving velocity.

Method for operating an automatic or semi-automatic transmission of a heavy vehicle when in idle-driving mode

Method for protecting a clutch of a vehicle, said vehicle being provided with an engine, drive wheels and an automated manual transmission for transmitting drive power from said engine to said drive wheels. A controller can execute the steps of: sensing a power demand from the driver which results in a clutch control where the clutch is partly engaged and clutch slip occurs, measuring travelling distance(s) of the vehicle during a predetermined first time interval, initiating a first warning measure, in order to alert the driver of excessive clutch slip, if the vehicle has traveled less than a predetermined distance during said predetermined first time interval.

Method for clutch protection

A method is provided for controlling disengagement of an automated clutch in a vehicle. A decrease of a first engine rotational speed limit, at which the clutch is disengaged, is initiated upon sensing travel of the vehicle in a down slope, and zero displacement of the throttle control. The first engine rotational speed limit is decreased to a speed where an, in the vehicle arranged, engine idle speed regulator injects an amount of fuel corresponding to a positive engine torque which equals current retarding negative engine torque so that total output torque from the engine is approximately zero. The vehicle accelerating effect due to engine braking torque drop out when the clutch is disengaged will be eliminated.

Method for controlling disengagement of an automated clutch in a vehicle

A method for clutch disengagement at idling running of a vehicle including an automated manual transmission is characterized in that a rate of the clutch disengagement is controlled responsive to a brake pedal force applied to a brake pedal by a vehicle operator. A clutch disengagement controller controls a rate of clutch disengagement at engine idling running mode. The clutch disengagement controller is connected to a brake pedal sensor sensing a force applied to a brake pedal and to at least one air inlet valve controlling a position of a clutch cylinder. The controller controls opening of said at least one air inlet valve responsive to the force sensed by the brake pedal sensor.

Clutch control method and controller therefor

Method and arrangement for adjusting shift characteristics of a transmission of a heavy vehicle. A heavy vehicle is operated and that is powered by an internal combustion engine equipped with an automated manual transmission and a power take off. The power take off, when operating, imposes a torque-consuming load on the engine. Operation of the power take off is detected when the engine of the vehicle is in a power mode. At least one gear-shift event is adapted to occur at a higher engine speed when power take off operation is detected than when power take off operation is not detected. The gear-shift event is affected at an engine speed that is approximately five to twenty-five percent higher than when power take off operation is not detected. The gear-shift event may be an up-shift to a lower ratio gear engagement or a down-shift to a higher ratio gear engagement.

Method and arrangement for adapting shifting strategies in a heavy vehicle including an automated transmission and experiencing a PTO load

An automatic gearshifting process and/or disengagement process of a coupling-dependent power take off for a vehicle with the power take off engaged and when the vehicle is in motion. The power tapping at the power take off is minimized before a gearshift and/or disengagement of the claw clutch of the power take off takes place. One advantage is that gearshifting can be realized with engaged coupling-dependent power take off. Comfort is increased and coupling teeth wear is minimized, whilst, at the same time, a gear and the claw clutch of the power take off are able to be securely disengaged.

Automatic gearshifting process for a vehicle with engaged coupling-dependent power take off and automatic disengagement process of a coupling-dependent power take off

Method and arrangement for providing a vehicle having an internal combustion engine and a drivetrain coupled to the internal combustion engine. A control unit is utilized for automatic gear selection, based on a function of the current rotational speed of an input shaft to the gearbox, and in which the control unit is designed to assume a first operating mode having a first working speed range with a first lower limit for downshifting to a gear with a higher transmission ratio.

Vehicle and method for automatic gear selection in a gearbox forming part of a vehicle

Method and arrangement for providing an automatic gearshift procedure for a vehicle with engaged clutch-dependent power take-off () when the vehicle is in motion. The power take-off () is driven by an engine () via an automated disk clutch () and an automatic stage-geared gearbox () in which an intermediate shaft () for driving the power take-off () is arranged. The control unit () controls the gearbox (), the disk clutch () and the engine () so that shifting when the vehicle is in motion can take place even with an engaged clutch-dependent power take-off ().

Gearshift procedure for vehicles with engaged clutch-dependent power take-off

Method and device for controlling the position of an automatic disk clutch () as a function of the position of a throttle lever () arranged in a vehicle is disclosed. In some preferred embodiments, the method is employed when starting the vehicle from stationary or virtually from stationary, in which a function (e.g., a primary function) of the disk clutch () is to transmit motive force from an internal combustion engine () arranged in a vehicle to an input shaft () of a stagegeared gearbox (). The position () of the disk clutch is also preferably controlled as a function of at least one of the parameters: vehicle weight; tractive resistance of the vehicle; and the selected transmission ratio between the gearbox input shaft and the driving wheels of the vehicle.

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Mölndal, Sweden

Erik Lauri