An MG1 torque at a time of decreasing an engine speed of an engine is made larger when a turbocharging pressure by a turbocharger is higher than when the turbocharging pressure is lower. In this way, even if the losses of pumps of the engine differ due to the remaining turbocharging pressure during a transition of stopping the engine in turbocharging, it is possible to appropriately reduce the engine speed. Therefore, when the engine is being brought to a stop, it is possible to appropriately suppress vibration generated in the vehicle.

A hybrid vehicle includes an engine, a first MG, a second MG, a planetary gear mechanism, and an HV-ECU. The engine includes a supercharger and a purge device. The purge device introduces fuel vapor into an intake passage of the engine. Upon request for fuel purge, when an operating point of the engine is included in an area A, the HV-ECU controls the engine and the first MG to move the operating point to outside of the area A.

An engine includes an EGR device and a water-cooled heat exchanger. The water-cooled heat exchanger is provided on a downstream side of an EGR gas-introduction portion of an intake passage into which EGR gas is to be introduced and exchanges heat with gas flowing in the intake passage. A control device is programmed to execute condensed water-suppression control that supplies coolant having a temperature higher than the temperature of the gas heat-exchanged in the water-cooled heat exchanger to the water-cooled heat exchanger while a hybrid vehicle is traveling in a state in which the engine is stopped.

A vehicle includes an engine, a first MG, a planetary gear mechanism to which the engine, the first MG, and a counter shaft are connected, and an HV-ECU configured to control the engine and the first MG. The engine includes a turbocharger that boosts suctioned air to be fed to the engine. The HV-ECU controls the engine and the first MG to initially decrease the engine's rotation speed and simultaneously increase torque that the engine generates when on a map indicating a relationship between the engine's rotation speed and torque generated by the engine the controller shifts a first operating point to a second operating point at which torque generated by the engine and the rotation speed of the engine are higher than at the first operating point and the turbocharger boosts suctioned air.

A hybrid vehicle with four drive wheels having: an internal combustion heat engine, which transmits the motion to a first pair of drive wheels and has at least one cylinder provided with at least one intake valve and with an exhaust valve; a turbine, which is designed to be rotated by the exhaust gases; a first electric machine, which is designed to be rotated by the turbine so as to generate electrical energy; a second electric machine, which transmits the motion to a second pair of drive wheels; and a control unit, which is configured to cyclically determine an electric power to be necessarily generated and an electric power generated by the first electric machine and to adjust an opening advance of the exhaust valve depending on the difference between the electric power generated by the first electric machine and the electric power to be necessarily generated.

A hybrid vehicle includes an engine with cylinders generating driving power and a turbocharger having a turbine in an exhaust line, and a compressor which rotates with the turbine and compresses intake gas. An electric supercharger is disposed in the intake line upstream from the compressor, a catalytic converter is disposed in the exhaust line downstream from the turbine. A post processing bypass line connects the exhaust line at a downstream portion of the catalytic converter and the intake line at a downstream portion of the electric supercharger. A low pressure EGR device includes a low pressure EGR line branching off from the exhaust line and merging into the intake line and a low pressure EGR cooler disposed therein. A high pressure EGR device includes a high pressure EGR line branching off from an exhaust system and merging into an intake system, and a high pressure EGR cooler disposed therein.

When it is determined that control of warm-up of a catalyst is necessary at the time of start of an engine, an ECU starts warm-up control. Initially, the ECU performs first processing for a first set time period. In the first processing, the ECU sets the engine to an idle state and fully opens a waste gate valve. When the first set time period has elapsed since the first processing was started, the ECU performs second processing. In the second processing, the ECU sets the engine to a prescribed rotation speed and fully closes the waste gate valve. When a second set time period has elapsed since the second processing was started, the ECU quits the second processing and quits warm-up control.

When a learning condition is satisfied, an ECU starts learning processing and controls opening of a throttle valve in accordance with a first map. The ECU calculates a difference between an actual rotation speed and a target rotation speed of the engine at the current time. When magnitude of the difference is equal to or larger than a prescribed value, the ECU performs second learning processing. In second learning processing, the ECU controls a first MG to set a rotation speed of the engine to an idle rotation speed by using output torque from the first MG. How much the throttle valve's opening is corrected is calculated based on torque of the first MG required for setting the rotation speed of the engine to the idle rotation speed, and opening of the throttle valve is updated. The first map is updated based on updated opening of the throttle valve.

An HV-ECU performs processing including calculating requested system power, calculating requested engine power when an engine activation request has been issued, setting an operating point on a predetermined operating line, setting an upper limit value of magnitude of an amount of lowering in engine rotation speed to a first value when a vehicle is in a sport running state and when the previous operating point is within a forced induction range, setting the upper limit value to a second value when the vehicle is not in the sport running state or when the previous operating point is not within the forced induction range, correcting the operating point, and outputting an engine operation state command, a first MG torque command, and a second MG torque command.

A vehicle includes an engine including a forced induction device, a knock sensor and a crank angle sensor that detect an occurrence of LSPI, a battery that supplies electric power to a second motor generator, and an ECU. When an occurrence of the LSPI is detected, the ECU restricts a maximum torque, which can be output by the engine with the forced induction device, more than when an occurrence of the LSPI is not detected to prevent an engine operating point from being included in an LSPI area, and when an output of the engine becomes insufficient along with the restriction on the maximum torque, the engine compensates for an amount of the insufficient output with electric power supplied from the battery.