A method for controlling a powertrain of a hybrid vehicle includes the following steps performed by a hybrid controller: determining whether an ambient air temperature is lower than a predetermined temperature; driving a motor and operating a heating disc of an electrically heated catalytic converter disposed in an exhaust pipe of an internal combustion engine during a predetermined operating time when an ambient air temperature is lower than a predetermined temperature; supplying ambient air to the heating disc; and varying a flow rate of the ambient air supplied to the heating disc in response to a temperature change of the heating disc.

Engine combustion mode-switching transitions are controlled through a coordination control of an electric machine and a multi-combustion mode engine coupled to each other with a hybrid propulsion system by following predetermined combustion mode-switching strategies and control algorithms.

An apparatus of controlling a hybrid vehicle may include: an engine; a drive motor to assist the power of the engine and selectively operate as a generator to generate electrical energy; a battery to supply electrical energy; a first intake valve disposed in a first intake line; a second intake valve disposed in a second intake line; a first electric supercharger disposed in the first intake line; a second electric supercharger disposed in the second intake line; a connecting valve disposed in a connecting line for connecting the first intake line and the second intake line; and a controller that determines a driving mode of the first and second electric superchargers. In particular, the controller controls the drive motor and the first and second electric superchargers based on a supercharger consumed energy, an additional fuel energy, and a drive motor consumed energy.

An apparatus and method for controlling a power train of a vehicle may include an external information detection device detecting information on an external environment of the vehicle; an internal information detection device detecting information on a driving state of the vehicle; and a control device detecting occurrence of an overtaking situation of the vehicle according to the information on the external environment and the driving state, and controlling the power train of the vehicle based on a rotation angle of a steering wheel of the vehicle so that a response speed to a manipulation of an accelerator pedal in the vehicle speeds up when the occurrence of the overtaking situation of the vehicle is detected.

A transmission control device (4) includes: a gear ratio calculating unit (4a) for calculating a target gear ratio of a transmission (2) based on a gear ratio control mode, to thereby control the transmission; an electric motor drive torque calculating unit (4b) for calculating a drive torque of an electric motor (9) based on the gear ratio control mode when drive of the electric motor (9) is permitted; and an engine torque calculating unit (4c) for calculating an output torque of an engine (1) based on the gear ratio control mode so as to achieve a best fuel efficiency operation state. The gear ratio calculating unit (4a) switches processing of calculating a gear ratio based on whether or not the drive of the electric motor (9) is permitted.

Provided are a driver posture measurement device and a vehicle control device that can accurately measure the posture of a driver with a simple configuration without attaching a plurality of wireless communication units to a vehicle. The driver posture measurement device and the vehicle control device are configured such that, between one wireless communication unit provided on the vehicle side and one wireless communication unit provided on the driver side, radio waves are radiated from the wireless communication unit provided on the vehicle side, and on the basis of a radio wave arrival angle of the radio waves arriving at the wireless communication unit provided on the driver side, the driver posture is measured.

A control system for a vehicle includes an electronic control unit. The electronic control unit is configured to i) calculate a target supercharging pressure of an intake air such that, when an internal combustion engine is operated through the homogeneous charge compression ignition, the internal combustion engine achieves a required output while satisfying a predetermined requirement, ii) control an output of the internal combustion engine such that the output approaches the required output in accordance with an actual supercharging pressure in process of changing the actual supercharging pressure to the target supercharging pressure that is achieved by a supercharger, and iii) control a rotary machine such that an output of the rotary machine compensates for part or all of a differential output between the required output and the output in process of changing the actual supercharging pressure to the target supercharging pressure.

A method for controlling a drivetrain of a motor vehicle is disclosed. Either a start mode for starting the reciprocating engine is activated via the driving vehicle wheel, or a coasting mode is activated for driving the reciprocating engine via the driving vehicle wheel. At least one volume-reducing stroke is executed that follows an intake stroke for at least one cylinder of the reciprocating engine with at least intermittently open cylinder. Alternately at least one volume-enlarging stroke is executed for at least one cylinder of the reciprocating engine, which is followed by a compression stroke of this cylinder, and at least one volume-reducing stroke of this cylinder, which follows an expansion stroke that follows the compression stroke, with a cylinder that is closed, if possible, in this operating mode.

A hybrid vehicle includes an internal combustion engine and a rotary electric machine. The internal combustion engine includes a variable valve actuating device configured to change an operation characteristic of an intake valve. The rotary electric machine is configured to generate driving force for propelling the hybrid vehicle. A controller for the hybrid vehicle includes a traveling control unit and a valve actuation control unit. The traveling control unit executes traveling control for causing the hybrid vehicle to travel by using the driving force of the rotary electric machine while stopping the internal combustion engine. The traveling control unit starts up the internal combustion engine while executing the traveling control. The valve actuation control unit controls the variable valve actuating device. The valve actuation control unit, when the internal combustion engine is started up while the traveling control is executed, sets at least one of a valve lift and valve operating angle of the intake valve such that the at least one of the valve lift and valve operating angle of the intake valve when the hybrid vehicle travels at a first vehicle speed is smaller than the corresponding at least one of the valve lift and valve operating angle of the intake valve when the hybrid vehicle travels at a second vehicle speed. The second vehicle speed is lower than the first vehicle speed.

Methods and systems are provided for using compression heating to heat a cylinder piston before cylinder combustion is resumed. Cylinder heating is achieved using combinations of slow unfueled engine rotation where the engine cylinders are heated via compression stroke heating, and slow compressor rotation where the cylinders are heated via compression heating. One or more intake or exhaust heaters may be concurrently operated to expedite cylinder heating.