A system for automatically controlling shut-off of a vehicle includes: a sensor that senses existence of a user in the vehicle; and a vehicle controlling device that determines whether the vehicle is in an idle state, determines whether a user exists in the vehicle based on a sensing value of the sensor, controls the vehicle to automatically shut off, and notifies a user of a vehicle state.

A system for automatically controlling shut-off of a vehicle includes: a sensor that senses existence of a user in the vehicle; and a vehicle controlling device that determines whether the vehicle is in an idle state, determines whether a user exists in the vehicle based on a sensing value of the sensor, controls the vehicle to automatically shut off, and notifies a user of a vehicle state.

An internal combustion engine includes an intake variable lift amount mechanism that changes a maximum lift amount and valve-open period of an intake valve, and an exhaust variable lift amount mechanism that changes a maximum lift amount and valve-open period of an exhaust valve. A control unit executes a process to increase the valve-open period of the intake valve and reduce the valve-open period of the exhaust valve, when idling with a temperature of the internal combustion engine that is equal to or higher than a reference value.

Provided is a vehicle control device with which improved fuel economy and lowered exhaust gas emissions can be effectively achieved without adversely affecting the driver when traveling while following a leading vehicle. The present invention has: a following-determination means that, during travel while following a leading vehicle, determines, on the basis of the speed of the host vehicle, the speed of the leading vehicle, and the distance from the leading vehicle, whether the host vehicle will be able to follow the leading vehicle by coasting; and an idle stop determination means that, when the following-determination means has determined that the host vehicle will be able to follow the leading vehicle by coasting, and the driving/travel state of the host vehicle satisfies other traveling idle stop criteria, determines that a traveling idle stop should be performed; and is provided with a determination criteria updating means for updating the determination criteria for the idle stop determination means in regard to criteria such as the leading vehicle characteristics, road surface conditions, and weather. In the event that it has been determined, from the determination conditions that have been updated in regard to the leading vehicle characteristics, etc., that following by coasting is possible, a control to shut off the on-board engine is performed.

Provided is a vehicle control device with which improved fuel economy and lowered exhaust gas emissions can be effectively achieved without adversely affecting the driver when traveling while following a leading vehicle. The present invention has: a following-determination means that, during travel while following a leading vehicle, determines, on the basis of the speed of the host vehicle, the speed of the leading vehicle, and the distance from the leading vehicle, whether the host vehicle will be able to follow the leading vehicle by coasting; and an idle stop determination means that, when the following-determination means has determined that the host vehicle will be able to follow the leading vehicle by coasting, and the driving/travel state of the host vehicle satisfies other traveling idle stop criteria, determines that a traveling idle stop should be performed; and is provided with a determination criteria updating means for updating the determination criteria for the idle stop determination means in regard to criteria such as the leading vehicle characteristics, road surface conditions, and weather. In the event that it has been determined, from the determination conditions that have been updated in regard to the leading vehicle characteristics, etc., that following by coasting is possible, a control to shut off the on-board engine is performed.

Disclosed is a fuel injection control system for a single-cylinder diesel engine, comprising: a set of operating condition sensors including an accelerator pedal position sensor and a cooling water temperature sensor, an input signal interface capable of receiving an input signal from the operating condition sensors, a control unit connected to the input signal interface, and a rotational speed sensor provided at a camshaft or starting shaft of the single-cylinder diesel engine. The rational speed sensor is connected to the control unit via a rotational speed correction circuit. The control system can easily and quickly determine the rotational speed and operating stroke of the single-cylinder diesel engine, so as to quickly determine the fuel injection quantity and injection timing of the single-cylinder diesel engine in real time.

A system according to the principles of the present disclosure includes an engine stall module and an actuator control module. The engine stall module identifies a potential engine stall based on a speed of an engine and a rate of change in the engine speed. The actuator control module selectively adjusts an actuator of a powertrain system to prevent the engine from stalling when a potential engine stall is identified.

A system according to the principles of the present disclosure includes an engine stall module and an actuator control module. The engine stall module identifies a potential engine stall based on a speed of an engine and a rate of change in the engine speed. The actuator control module selectively adjusts an actuator of a powertrain system to prevent the engine from stalling when a potential engine stall is identified.

A vehicle control system includes an acceleration generating device (engine, T/M) that generates an acceleration applied to a vehicle, and a vehicle control device that controls the acceleration generating device, based on an accelerator pedal stroke representing an operation of an accelerator pedal by a driver, and a vehicle speed of the vehicle. In the vehicle control system or method, the vehicle control device controls the acceleration generating device, based on a required acceleration that is determined based on a relationship between the accelerator pedal stroke and the required acceleration, including, as a condition, an acceleration corresponding to a given accelerator pedal stroke, which is specified by a relationship between the vehicle speed and the acceleration when the accelerator pedal stroke is held at the given value.

A system according to the principles of the present disclosure includes a storage capability module and at least one of an engine speed control module and a spark control module. The storage capability module determines a capability of a catalytic converter to store oxygen. The engine speed control module controls a speed of an engine based on the oxygen storage capability of the catalytic converter. The spark control module controls a spark timing of the engine based on the oxygen storage capability of the catalytic converter.