In an aspect, a computer system is provided comprising processing circuitry configured to acquiring information indicating a temperature of an exhaust aftertreatment system, EATS, of a vehicle, maintaining a current gear of the vehicle in response to the vehicle approaching a downhill slope and the acquired information indicating that the temperature should be increased, and decreasing speed of an engine of the vehicle for causing engine braking in the downhill slope, while maintaining a speed of the vehicle within a set vehicle speed range.

A vehicle control method for a vehicle provided with an engine, a generator, and a drive motor. The engine is used to drive the generator to generate electrical power. The electrical power from the generator in turn is used to drive the drive motor. A filter is provided to collects particulate matter in exhaust gas from the engine. A fuel cut-off prohibition of the engine is performed based on a temperature of the filter. A regeneration amount by the drive motor is suppressed according to when a fuel cut-off prohibition condition of the engine is satisfied.

A system includes a hybrid power train comprising an internal combustion engine and electrical system, which includes a first and second electrical torque provider, and an electrical energy storage device electrically coupled to first and second electrical torque provider. The system further includes a controller structured to perform operations including determining a power surplus value of the electrical system; determining a machine power demand change value; in response to the power surplus value of the electrical system being greater than or equal to the machine power demand change value, operating an optimum cost controller to determine a power division for the engine, first electrical torque provider, and second electrical torque provider; and in response to the power surplus value of the electrical system being less than the machine power demand change value, operating a rule-based controller to determine the power division for the engine, first, and second electrical torque provider.

When a temperature of a catalyst in an exhaust emission control device mounted in an exhaust system of an engine is equal to or higher than a predetermined temperature at a time of a request for stopping the engine, a hybrid vehicle including the engine and a motor continues fuel injection of the engine until satisfaction of a predetermined condition and stops fuel injection of the engine on satisfaction of the predetermined condition. When the temperature of the catalyst is lower than the predetermined temperature at the time of the request for stopping the engine, on the other hand, the hybrid vehicle immediately stops fuel injection of the engine.

A control device for a vehicle includes a resonance suppressor configured to control any one of a temperature increase process, a slip amount of a lock-up clutch, and a gear position of a transmission to execute a resonance suppression process suppressing resonance of an internal combustion engine and the transmission caused by execution of the temperature increase process, when the temperature increase process is requested, when the lock-up clutch is in the engaged state, and when rotational speed of the internal combustion engine falls in a resonance region in which the internal combustion engine resonates with the transmission if the temperature increase process is executed.

The hybrid vehicle is provide with the control device configured to permit fuel cutoff of the engine when the SOC of the power storage device is greater than a first predetermined ratio, an amount of particulate matter deposited on the filter is less than a first predetermined amount, or a temperature of the filter is lower than a predetermined temperature. The control device is configured to set the allowable upper-limit ratio of the SOC: to a second predetermined ratio greater than the first predetermined ratio when the PM amount is less than a second predetermined amount less than the first predetermined amount, and to a third predetermined ratio equal to or less than the first predetermined ratio when the PM amount is equal to or greater than the second predetermined amount.

A vehicle control method for a vehicle provided with an engine, a generator, and a drive motor. The engine is used to drive the generator to generate electrical power. The electrical power from the generator in turn is used to drive the drive motor. A filter is provided to collects particulate matter in exhaust gas from the engine. A fuel cut-off prohibition of the engine is performed based on a temperature of the filter. A regeneration amount by the drive motor is suppressed according to when a fuel cut-off prohibition condition of the engine is satisfied.

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.

The control system of an internal combustion engine controls an internal combustion engine comprising an exhaust sensor. The control system comprises a motoring device driving rotation of a crankshaft of the internal combustion engine, a motoring control part configured to control the motoring device, a heater control part configured to control supply of electric power to the heater, and a temperature estimating part configured to estimate a temperature of the sensor element. The motoring control part is configured to drive the motoring device for a predetermined time when the temperature of the sensor element estimated by the temperature estimating part is outside a predetermined cracked element temperature region while the heater control part is supplying electric power to the heater, and stop driving the motoring device when the temperature of the sensor element is within the cracked element temperature region.

A system for control of temperature for a vehicle exhaust treatment system comprising a first determination unit arranged for determination of a temperature for the exhaust treatment system, and a simulation unit arranged for simulation of a future velocity profile, based on information relating to a road section. A second determination unit arranged for determination, based on a future velocity profile, of whether a simulated active brake process due to an over-speed for the vehicle will occur within the road section. A utilization unit is arranged for utilization, if the at least one temperature for the exhaust treatment system is below a minimum temperature threshold value, and if the simulated active brake process is simulated to occur within the road section, of an engine fitted auxiliary brake, which is fitted in connection with an exhaust stream from an engine in the vehicle, where the utilization is initiated before over-speed occurs.