A power system is disclosed. The power system may include one or more memories and a controller. The controller may determine an exhaust temperature of an engine associated with a continuously variable transmission or a hybrid transmission. The controller may determine a target increase to the exhaust temperature based on the exhaust temperature failing to satisfy a threshold. The controller may determine, based on a lookup table, a target increase to a torque output of the engine based on the target increase to the exhaust temperature. The controller may cause a parasitic torque of the engine to be increased based on the target increase to the torque output.

When stopping combustion in a cylinder under a situation in which the crankshaft of an internal combustion engine having an ignition device is rotating, a controller executes a fuel introduction process of injecting fuel from a fuel injection valve and introducing the fuel from inside the cylinder to the exhaust passage without burning the fuel. Also, the controller executes a storing process before starting the fuel introduction process. In the storing process, the controller stores oxygen in a three-way catalyst by executing a fuel cutoff process of stopping fuel injection of the fuel injection valve under a situation in which the crankshaft is rotating.

A blow-by gas treating device discharges blow-by gas into intake air. A controller selects and executes one of a fuel cutoff process and a fuel introduction process when stopping combustion in a cylinder under a situation in which a crankshaft of the internal combustion engine is rotating. An injection valve controlling section controls a fuel injection valve to regulate a fuel injection amount in a period in which the combustion in the cylinder is stopped under the situation in which the crankshaft is rotating. The injection valve controlling section decreases the fuel injection amount from the fuel injection valve as an oil temperature that is the temperature of engine oil increases.

A power system is disclosed. The power system may include one or more memories and a controller. The controller may determine an exhaust temperature of an engine associated with a continuously variable transmission or a hybrid transmission. The controller may determine a target increase to the exhaust temperature based on the exhaust temperature failing to satisfy a threshold. The controller may determine, based on a lookup table, a target increase to a torque output of the engine based on the target increase to the exhaust temperature. The controller may cause a parasitic torque of the engine to be increased based on the target increase to the torque output.

Provided is a plug-in hybrid vehicle which includes an exhaust treatment unit which communicates with an engine and discharges exhaust gas generated by combustion of liquid fuel, an oxidation catalyst and an SCR which are placed in a middle part of the exhaust treatment unit to remove impurities contained in the exhaust gas, and an external charging mechanism which is electrically connected with a battery and charges the battery with external electrical power, where the external charging mechanism includes a first heater unit and a second heater unit which heat the oxidation catalyst and the SCR with electrical power stored in the battery or external electrical power when the battery is charged with the external electrical power in a state where the fuel-based power unit and the electrical power unit are stopped.

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.

A control device for a hybrid vehicle includes a driving control part configured to acquire for each driving road section from a server a value of the output parameter linked with a vehicle speed of the same extent as the scheduled vehicle speed when driving over a driving road section on a scheduled driving route to calculate for each driving road section the scheduled vehicle demanded output when driving over the driving road section or acquire from the server the scheduled vehicle demanded output for each driving road section calculated based on the value of the output parameter for each driving road section at the server to heat the catalyst device before using the output of the internal combustion engine as part of the drive power when there is the driving road section where the scheduled vehicle demanded output becomes the engine start output or more.

When stopping combustion in a cylinder under a situation in which the crankshaft of an internal combustion engine having an ignition device is rotating, a controller executes a fuel introduction process of injecting fuel from a fuel injection valve and introducing the fuel from inside the cylinder to the exhaust passage without burning the fuel. Also, the controller executes a storing process before starting the fuel introduction process. In the storing process, the controller stores oxygen in a three-way catalyst by executing a fuel cutoff process of stopping fuel injection of the fuel injection valve under a situation in which the crankshaft is rotating.

A blow-by gas treating device discharges blow-by gas into intake air. A controller selects and executes one of a fuel cutoff process and a fuel introduction process when stopping combustion in a cylinder under a situation in which a crankshaft of the internal combustion engine is rotating. An injection valve controlling section controls a fuel injection valve to regulate a fuel injection amount in a period in which the combustion in the cylinder is stopped under the situation in which the crankshaft is rotating. The injection valve controlling section decreases the fuel injection amount from the fuel injection valve as an oil temperature that is the temperature of engine oil increases.

Various teachings herein include a method of operating a vehicle comprising a combustion engine, an electric motor, and an electrically heated catalyst. The method includes: simultaneously evaluating energy consumption and emissions due to increasing or decreasing catalyst heating actions and due to increasing or decreasing electric motor torque based on an operating model; and determining an operating mode for each of the combustion engine, electric motor, and electrically heatable catalyst using the operating model to optimize operation based on an optimization goal.