A chiller system includes an intercooler configured to cool compressed charge air received from a turbocharger or a supercharger, a low temperature cooling circuit fluidly coupled to the intercooler, the low temperature cooling circuit circulating a coolant to provide cooling to the intercooler and including a low temperature radiator configured to cool the coolant, a chiller-accumulator loop having a combined chiller-accumulator, a chiller bypass line bypassing the chiller-accumulator, and a charging valve configured to selectively provide coolant to at least one of the chiller-accumulator loop and the chiller bypass line, and an air conditioner circuit circulating a refrigerant and having a primary circuit and a bypass circuit. Refrigerant is selectively supplied to the chiller-accumulator to further cool the coolant in the chiller-accumulator loop after the coolant is cooled by the low temperature radiator, thereby providing increased cooling to the intercooler and the compressed charge air to increase engine performance.

A method for operating a drivetrain of a motor vehicle, includes, when the motor vehicle is at a standstill and upon demand for a drive torque of the motor vehicle, increasing power (25p) supplied to a separate electric pump drive (25) such that a pressure chamber whose pressurization effects a complete closure or lock-up of a launch element (3) is fast charged with hydraulic pressure from a pump (24). The method also includes performing a launch process of the motor vehicle with the drive source (1) and with a closed or locked-up launch element (3) and reducing the power (25p) supplied to the separate electric pump drive (25) after fast charging the pressure chamber. A related drive train module is also provided.

A method for operating a dual clutch transmission of a motor vehicle having a first partial transmission, a second partial transmission, and a transmission output shaft common to the partial transmissions and drivable both by the first partial transmission and by the second partial transmission, in which the dual clutch transmission is in a parking lock state in which two gears of one of the partial transmissions are engaged simultaneously. The following steps are carried out to exit the parking lock state: Introducing a torque caused by a drive element of the motor vehicle via the transmission output shaft common to the one partial transmissions into the one and/or other partial transmission while the gears of the partial transmission are engaged; and disengaging at least one of the gears of the one partial transmission engaged simultaneously in step a).

Disclosed is a method for control of a vehicle with a drive system comprising a planetary gear and a first and second electrical machine, connected with their rotors to the components of the planetary gear, a braking of the vehicle towards stop occurs by way of a distribution of the desired braking torque between the first and the second electrical machines, and wherein such electrical machines are controlled to transmit a total torque to an output shaft of the planetary gear, which corresponds to the desired braking torque at least to one predetermined low speed limit, before the vehicle stops.

A four-wheel-drive vehicle includes: a pump that is actuated by an electric motor; a friction clutch that has a plurality of clutch plates that are pressed by a piston that is movable by working oil discharged from the pump; a control device that controls the electric motor; front wheels, to which a drive force of an engine is always transferred; and rear wheels, to which the drive force of the engine is transferred in accordance with the fastening force of the friction clutch. When it is determined that the vehicle is in a high fastening force-requiring state in which it is necessary for the friction clutch to transfer a large drive force temporarily, the control device causes the electric motor to output torque that is larger than torque that the electric motor can continuously output.

A system of determining starting tendency of a driver may include: a vehicle speed sensor detecting a vehicle speed an accelerator pedal position sensor detecting an accelerator pedal position, and a controller receiving information on input variables including the accelerator pedal position, the vehicle speed from the accelerator pedal position sensor or the vehicle speed sensor, determining a short term driving tendency, a long term driving tendency, and a starting tendency of the driver based on the information, and controlling an engine or a transmission according to the short term driving tendency, the long term driving tendency, and the starting tendency, in which the controller continuously determines the short term driving tendency of the driver for a predetermined time and determines the starting tendency of the driver from a predetermined number (n) of the short term driving tendencies of the driver.

A drive system for a vehicle comprises two electrical machines arranged between a combustion engine and an input shaft to a gearbox. The first machine's rotor and the input shaft of the gearbox are each connected to a separate component of a planetary gear. The second electrical machine's rotor is connected with the output shaft of the combustion engine, which is connected with another component of the planetary gear. A first locking means may be moved between a locked position, in which the planetary gear's three components rotate at the same rotational speed, and a release position, allowing for different rotational speeds. A second locking means is moveable between a locked position, in which the output shaft of the combustion engine is locked together with the second machine's rotor and a release position, in which the combustion engine's output shaft is disconnected from the second machine's rotor.

In a method for controlling a vehicle with a drive system comprising a power unit configuration adapted to provide output for the vehicle's operation, and further comprising a planetary gear and a first and second electrical machine, connected to components in the planetary gear via their rotors, a locking means is moved from a locked position, in which two of the planetary gear's components are locked together, so that the three components of the planetary gear rotate with the same speed, to a release position, when the vehicle is driven with the locking means in a locked position, by carrying out the following method steps. The power unit configuration is controlled in order to achieve torque balance between the components that are locked together by the locking means, and such locking means are moved into a release position, when said torque balance prevails.

A chiller system includes an intercooler configured to cool compressed charge air received from a turbocharger or a supercharger, a low temperature cooling circuit fluidly coupled to the intercooler, the low temperature cooling circuit circulating a coolant to provide cooling to the intercooler and including a low temperature radiator configured to cool the coolant, a chiller-accumulator loop having a combined chiller-accumulator, a chiller bypass line bypassing the chiller-accumulator, and a charging valve configured to selectively provide coolant to at least one of the chiller-accumulator loop and the chiller bypass line, and an air conditioner circuit circulating a refrigerant and having a primary circuit and a bypass circuit. Refrigerant is selectively supplied to the chiller-accumulator to further cool the coolant in the chiller-accumulator loop after the coolant is cooled by the low temperature radiator, thereby providing increased cooling to the intercooler and the compressed charge air to increase engine performance.

In a method for controlling a vehicle with a drive system comprising an output shaft of a combustion engine and a planetary gear with a first and a second electrical machine, connected via their rotors to the components of the planetary gear, the combustion engine is started while the vehicle is driven by ensuring that the rotor of the second electrical machine is connected with the output shaft of the combustion engine, and controlling such electrical machine's rotational speed towards the combustion engine's idling speed, whereupon fuel injection into the combustion engine is carried out to start the latter.