If an engine coolant temperature is equal to or lower than a first low-temperature determination value and a battery temperature is equal to or lower than a second low-temperature determination value when a request to start up an engine is made, the advancement driving of a variable valve operating mechanism is first started. Then, when an advancement amount of the variable valve operating mechanism later becomes equal to or larger than a prescribed startup start determination value, is started.

A control system of a vehicle includes: a target speed module configured to, using a parametric driver model and based on first driver parameters, second driver parameters, and vehicle parameters, determine a target vehicle speed trajectory for a future predetermined period; a driver parameters module configured to determine the first driver parameters based on conditions within a predetermined distance in front of the vehicle; and a control module configured to adjust at least one actuator of the vehicle based on the target vehicle speed trajectory and a present vehicle speed.

Closing timing of an intake port is changed without using a variable valve timing mechanism. An electric vehicle includes an engine for electricity generation in which closing timing of an intake port maximizes intake air charging efficiency in a specific revolution speed region, a sensor which outputs a signal related to a revolution speed of the engine, a controller which drives the engine at a revolution speed based on the signal of the sensor, a requested electricity generation amount being satisfied at the revolution speed, and a motor which applies a positive or negative torque to the engine. When the engine is driven in a revolution speed region other than the specific revolution speed region, the controller uses the motor to apply a positive or a negative torque to the engine in an intake stroke to change the closing timing of the intake port to increase intake air charging efficiency.

A method includes operating a spark ignition engine and flowing low pressure exhaust gas recirculation (EGR) from an exhaust to an inlet of the spark ignition engine. The method includes interpreting a parameter affecting an operation of the spark ignition engine, and determining a knock index value in response to the parameter. The method further includes reducing a likelihood of engine knock in response to the knock index value exceeding a knock threshold value.

If an engine coolant temperature is equal to or lower than a first low-temperature determination value and a battery temperature is equal to or lower than a second low-temperature determination value when a request to start up an engine is made, the advancement driving of a variable valve operating mechanism is first started. Then, when an advancement amount of the variable valve operating mechanism later becomes equal to or larger than a prescribed startup start determination value, is started.

In a vehicle control device with an automatic engine stop function, when the engine is in a non-operating state and the shift lever is operated to the parking range, the engine is controlled to start to supply operating oil to a valve timing changing means. The valve timing changing means is thereupon caused to change the intake valve close timing (IVC) to a predetermined advance angle position and subsequently locked thereat. The engine is then controlled to stop.

To provide a control device capable of calculating a cam phase equal to an actual cam angle even when a corresponding cam angle signal detection range is exceeded by changing a cam phase by a variable valve mechanism. In addition to the conventional cam angle measuring function, a cam angle measuring means for advancing or retarding beyond a cam angle measurement reference position, and a means for determining that the cam angle signal advances or retards beyond the cam angle measurement reference position are provided. By switching the cam angle measuring function according to a determination result as to whether the cam angle signal exceeds the cam angle measurement reference position, it is possible to improve the time resolution of the angle measurement while maintaining the cam phase change amount at the same wide angle as the conventional one.

A supercharging system includes a supercharger including a motor generator, and an intake-side variable cam phase mechanism variably setting a valve-closing timing (IVC angle) of an intake valve. If an operation state of the engine is within a regenerative operation region, a turbine rotation speed controller controls a turbine rotation speed to a target turbine rotation speed set to optimize turbine efficiency by controlling an opening degree of a wastegate valve toward a closing side and by adjusting an amount of power generated by the motor generator. If the operation state is within the regenerative operation region and within a supercharging operation region, a torque controller controls a generated torque to a requested torque by performing cooperative control of an opening degree of an intake bypass valve, the IVC angle and an opening degree of an intake throttle valve.

The present disclosure provides a camshaft phase adjuster, including: a stator provided with a plurality of hydraulic chambers; a rotor rotatably disposed in the stator and provided with a basic body and a plurality of blades fixed to the basic body, the basic body has a first end surface and the second end surface which face opposite directions along an axial direction, the plurality of blades are arranged in intervals along the circumferential direction and divide the hydraulic chambers into first pressure chambers and second pressure chambers, respectively; wherein the basic body is provided with a plurality of first oil holes and a plurality of second oil holes which are communicated with the first pressure chambers and the second pressure chambers, respectively, the second oil hole is provided with at least two oil sub-holes, a first oil sub-hole extends along a radial direction of the basic body and is located on a same plane, with the first oil hole, perpendicular to a central axis of the rotor, the first oil sub-hole communicates with the second pressure chamber, and the second oil sub-hole penetrates through the first end surface along an axial direction of the basic body. Accordingly, technical solution of the present disclosure solves the problems of large in axial dimension and great in mass of existing camshaft phase adjusters.

In a flexible-fuel engine capable of using fuel containing alcohol as fuel to be combusted in a cylinder, the geometric compression ratio is set to 12 or more, the engine is started by using fuel containing alcohol, an intake valve closing timing at an engine start time is set to an advance angle side than a first reference timing being a timing corresponding to a most retarded angle position out of intake valve closing timings capable of starting the engine in combusting fuel of alcohol 100% in the cylinder at a first intake temperature, and is set to a timing on a retarded angle side than a second reference timing being a timing corresponding to a most advanced angle position out of intake valve closing timings capable of avoiding pre-ignition in combusting fuel of gasoline 100% at an engine start time at a second intake temperature.