A control unit decides whether or not a first condition that a service brake is released, a parking brake is actuated, and a transmission is shifted into neutral is established at a vehicle stopping time. In addition, the control unit decides whether or not a second condition that the service brake is actuated, and the transmission is shifted to an ahead stage is established at the vehicle stopping time. Then, the control unit stops the engine when the first condition or the second condition is established.

A vehicle system for mounting in a vehicle which includes a control device. The control device includes a calculation unit calculating a stopping rate which is a percentage an automatic stop in a predetermined period, and a charge controller. The charge controller performs charging relative to an electrical storage device from a power generator when a charging rate is lower than a predetermined charging rate. The charge controller also controls the power generator such that the charging rate to the electrical storage device is increased with an automatic restart.

A vehicle system for mounting in a vehicle which includes a control device. The control device includes a calculation unit calculating a stopping rate which is a percentage an automatic stop in a predetermined period, and a charge controller. The charge controller performs charging relative to an electrical storage device from a power generator when a charging rate is lower than a predetermined charging rate. The charge controller also controls the power generator such that the charging rate to the electrical storage device is increased with an automatic restart.

A running control apparatus for improving fuel efficiency by enabling automatic engine stop includes: a moving object detection unit for detecting a moving object moving in a direction crossing a direction of travel of own vehicle on the basis of an acquired image acquired from an image pickup apparatus; an acceleration calculation unit for calculating acceleration of the moving object; a moving object crossing intention determination unit for determining, on the basis of the acceleration of the moving object, whether or not the moving object intends to cross an intersection ahead of the own vehicle in the direction crossing the direction of the travel of the own vehicle before the own vehicle crosses the intersection; and automatic engine stop decision unit for deciding whether the own vehicle automatically stops an engine during running on the basis of a result of determination of the moving object crossing intention determination unit.

A running control apparatus for improving fuel efficiency by enabling automatic engine stop includes: a moving object detection unit for detecting a moving object moving in a direction crossing a direction of travel of own vehicle on the basis of an acquired image acquired from an image pickup apparatus; an acceleration calculation unit for calculating acceleration of the moving object; a moving object crossing intention determination unit for determining, on the basis of the acceleration of the moving object, whether or not the moving object intends to cross an intersection ahead of the own vehicle in the direction crossing the direction of the travel of the own vehicle before the own vehicle crosses the intersection; and automatic engine stop decision unit for deciding whether the own vehicle automatically stops an engine during running on the basis of a result of determination of the moving object crossing intention determination unit.

A restart control system includes a rotational angle estimation unit that estimates a rotating electrical machine's rotational angle in a state wherein an internal-combustion engine's rotational speed detected by a rotational speed detection unit is higher than an estimation threshold and configured not to estimate rotating electrical machine's rotational angle in a state wherein internal-combustion engine's rotational speed is lower than estimation threshold; a rotating electrical machine control unit increases internal-combustion engine's rotational speed by rotating electrical machine under condition where predetermined restart conditions are satisfied and rotating electrical machine's rotational angle is estimated by rotational angle estimation unit, thereby restarting the internal-combustion engine; and a starter motor control unit starts driving of a starter motor under a condition where predetermined restart conditions are satisfied and internal-combustion engine's rotational speed falls below a predetermined rotational speed set lower than estimation threshold, thereby increasing internal-combustion engine's rotational speed to estimation threshold.

A restart control system includes a rotational angle estimation unit that estimates a rotating electrical machine's rotational angle in a state wherein an internal-combustion engine's rotational speed detected by a rotational speed detection unit is higher than an estimation threshold and configured not to estimate rotating electrical machine's rotational angle in a state wherein internal-combustion engine's rotational speed is lower than estimation threshold; a rotating electrical machine control unit increases internal-combustion engine's rotational speed by rotating electrical machine under condition where predetermined restart conditions are satisfied and rotating electrical machine's rotational angle is estimated by rotational angle estimation unit, thereby restarting the internal-combustion engine; and a starter motor control unit starts driving of a starter motor under a condition where predetermined restart conditions are satisfied and internal-combustion engine's rotational speed falls below a predetermined rotational speed set lower than estimation threshold, thereby increasing internal-combustion engine's rotational speed to estimation threshold.

The present invention provides a cooling device for an internal combustion engine of a vehicle. While the vehicle is in a decelerating state and while the internal combustion engine is in an idle reduction state, the cooling device increases the ratio of the cooling water circulation rate through a first path which extends through a heater core and a radiator while reducing the ratio of the cooling water circulation rate through a second path which bypasses the heater core and radiator. In addition, the cooling device increases the discharge flow rate of the electric water pump while the vehicle is in a decelerating state, and maintains the electric water pump in an operating state during idle reduction. Thus, the present invention allows accelerating the temperature decrease of the cylinder head during idle reduction, as well as improving fuel economy during acceleration when the vehicle is started.

The present invention provides a cooling device for an internal combustion engine of a vehicle. While the vehicle is in a decelerating state and while the internal combustion engine is in an idle reduction state, the cooling device increases the ratio of the cooling water circulation rate through a first path which extends through a heater core and a radiator while reducing the ratio of the cooling water circulation rate through a second path which bypasses the heater core and radiator. In addition, the cooling device increases the discharge flow rate of the electric water pump while the vehicle is in a decelerating state, and maintains the electric water pump in an operating state during idle reduction. Thus, the present invention allows accelerating the temperature decrease of the cylinder head during idle reduction, as well as improving fuel economy during acceleration when the vehicle is started.

An engine control system, vehicle system, and method are provided that are arranged to direct dynamically fuel management of an engine. The engine is operated a first firing fraction, a first cam phase, and a first throttle control position. A desired second firing fraction and a desired second cam phase are then determined. A torque request and a throttle area are determined. Further, a desired second throttle control position is determined based on at least the throttle area, the torque request, the desired second firing fraction, and the desired second cam phase. The method, control system, and vehicle system are configured to transition from the first firing fraction to the desired second firing fraction while transitioning from the first throttle control position to the desired second throttle control position. As such, delivered torque can be accurately controlled without the need for spark retard during the transition between firing fractions.