A method for operating a drive device of a vehicle, in particular a motor vehicle, which has an internal combustion engine, at least one electric machine, and at least one heatable electric accumulator, in particular a lithium ion battery, power being drawn from the electric accumulator for starting the internal combustion engine with the aid of the electric machine. It is provided that, after the start of the internal combustion engine and until the heated electric accumulator reaches a predefined minimum temperature, the electric accumulator is operated without load. Furthermore, a drive device for a vehicle, in particular for carrying out the above-described method is provided.

A control apparatus of a hybrid vehicle having an electric oil pump includes an engine clutch selectively engaging an engine and a drive motor; an automatic transmission changing a power generated from the engine by engagement and releasing of a friction element into a required torque depending on a speed; a hydraulic pressure sensor sensing an oil pressure supplied to the engine clutch; a temperature sensor sensing an oil temperature discharged from the electric oil pump; a hybrid control unit (HCU) controlling the electric oil pump to selectively engage the engine clutch depending on a driving state; and a transmission control unit (TCU) controlling the electric oil pump to supply transmission control pressure to the friction element. The electric oil pump includes an oil motor and a pump to supply the operating hydraulic pressure to the engine clutch and the friction element.

A method for starting and operating an engine of a mild hybrid vehicle following start-up is disclosed for an engine having low and high voltage starting devices, and controlled by an electronic controller. The method comprises using the high voltage starting device as a motor to crank the engine whenever possible so as to partially discharge a high voltage battery. The method further comprises using the high voltage starting device as a generator after starting the engine if the exhaust gas temperature needs to be increased so as to assist with light-off of one or more exhaust gas after treatment devices.

A method for starting and operating an engine of a mild hybrid vehicle following start-up is disclosed for an engine having low and high voltage starting devices, and controlled by an electronic controller. The method comprises using the high voltage starting device as a motor to crank the engine whenever possible so as to partially discharge a high voltage battery. The method further comprises using the high voltage starting device as a generator after starting the engine if the exhaust gas temperature needs to be increased so as to assist with light-off of one or more exhaust gas after treatment devices.

A vehicle-drive-device control device controls an operating point of the engine by adjusting a torque of a first electric motor, such that a sum of the engine torque and the first electric motor torque is balanced with a torque of an input-side rotating element of a fluid transmission device, which is generated depending on a speed ratio of the fluid transmission device. The control device obtains the input-side rotating element torque based on the engine rotation speed indicated by a target engine operating point, and to determine the first electric motor torque based on the obtained torque and the engine torque indicated by the target engine operating point. The control device adjusts the first electric motor torque while giving/receiving the electric power between the first and second electric motors, to make the speed ratio lower when a temperature of operating oil is low, than when the temperature is high.

A vehicle-drive-device control device controls an operating point of the engine by adjusting a torque of a first electric motor, such that a sum of the engine torque and the first electric motor torque is balanced with a torque of an input-side rotating element of a fluid transmission device, which is generated depending on a speed ratio of the fluid transmission device. The control device obtains the input-side rotating element torque based on the engine rotation speed indicated by a target engine operating point, and to determine the first electric motor torque based on the obtained torque and the engine torque indicated by the target engine operating point. The control device adjusts the first electric motor torque while giving/receiving the electric power between the first and second electric motors, to make the speed ratio lower when a temperature of operating oil is low, than when the temperature is high.

The invention relates to an arrangement for supplying a rail vehicle with electrical energy. One electrical machine is allocated to each of at least two internal combustion engines for generating electrical energy. A common controller is designed to start the internal combustion engines individually as required. At least one pre-heating device is designed to pre-heat the internal combustion engines before a start. A temperature detection device is thermally coupled to the internal combustion engines. The controller is designed, during an operation of one of the internal combustion engines, to start another of the internal combustion engines if, due to cooling of the other internal combustion engine, a temperature of the other internal combustion engine detected by a temperature identifying device reaches or exceeds a temperature threshold.

The invention relates to an arrangement for supplying a rail vehicle with electrical energy. One electrical machine is allocated to each of at least two internal combustion engines for generating electrical energy. A common controller is designed to start the internal combustion engines individually as required. At least one pre-heating device is designed to pre-heat the internal combustion engines before a start. A temperature detection device is thermally coupled to the internal combustion engines. The controller is designed, during an operation of one of the internal combustion engines, to start another of the internal combustion engines if, due to cooling of the other internal combustion engine, a temperature of the other internal combustion engine detected by a temperature identifying device reaches or exceeds a temperature threshold.

A vehicle control device has a processor configured to estimate whether or not a driver is attempting to begin vehicle travel after a vehicle has been activated, based on a photographed image of an area near a driving seat, and to control an electrical oil pump to supply a second hydraulic pressure that is lower than a first hydraulic pressure which allows operation of a transmission having a frictional engagement element that can be engaged and disengaged by hydraulic pressure, when it has been estimated that the driver is not attempting to begin vehicle travel, or to control the electrical oil pump to supply the first hydraulic pressure to the transmission, when it has been estimated that the driver is attempting to begin vehicle travel.

A vehicle control device has a processor configured to estimate whether or not a driver is attempting to begin vehicle travel after a vehicle has been activated, based on a photographed image of an area near a driving seat, and to control an electrical oil pump to supply a second hydraulic pressure that is lower than a first hydraulic pressure which allows operation of a transmission having a frictional engagement element that can be engaged and disengaged by hydraulic pressure, when it has been estimated that the driver is not attempting to begin vehicle travel, or to control the electrical oil pump to supply the first hydraulic pressure to the transmission, when it has been estimated that the driver is attempting to begin vehicle travel.