Nissan Motor Company Limited

Takeshi Ohno

Kei Watanabe

Hiroshi Abe

Munetoshi Ueno

Masahiko Yuya

Kaori Tanishima

Takeshi Hirata

Haruhisa Tsuchikawa

Takatsugu Katayama

Yutaka Takamura

Tomoyuki Kodawara

Noboru Kudo

Tomoyuk Kodawara

Toshio Honda

A starting control device for an internal combustion engine is provided with a hard cranking device and a soft cranking device that are respectively capable of and incapable of cranking the internal combustion engine to a target idle rotation speed. The starting control device includes: a starting mode determination unit determining whether to carry out starting in a non-combustion pressure mode whereby starting is carried out with the hard cranking device, or in a combustion pressure combination mode whereby starting is carried out through cranking with the soft cranking device while using a combustion pressure generated by supplying fuel to the internal combustion engine in combination; and an intake air amount control unit making an amount of intake air during cranking differ between a case where starting is carried out in the non-combustion pressure mode and a case where starting is carried out in the combustion pressure combination mode.

Starting control device for internal combustion engines and starting control method

A hybrid vehicle control device provided with an engine idle unit for maintaining an engine rotation speed at an idle rotation speed by an engine, a motor idle unit for maintaining the engine rotation speed at the idle rotation speed by a motor generator, a switching unit for switching an idle control between execution of engine idle control and execution of motor idle control in accordance with an operation state of the hybrid vehicle, and an idle control changing unit for changing from the idle control to the engine idle control by adding a load torque portion of the motor generator having been inputted into the engine for maintaining the engine rotation speed at the idle rotation speed during the motor idle control to an output torque of the engine when the idle control is switched from the motor idle control to the engine idle control during the idle operation.

Hybrid vehicle control device and hybrid vehicle control method

An idling revolution speed control which maintains an engine speed at a predetermined target idling revolution speed during the idling drive includes an engine idling mode which performs the idling revolution speed control through an engine and a motor idling mode which performs the idling revolution speed control through a motor. The two modes are switched in accordance with a battery charged state. During the idling drive in an engine cold state, an ignition timing of the engine in the motor idling mode is retarded and the retardation quantities R, Rare expanded to be larger than the retardation quantities R, Rin the engine idling mode. Thus, a rise in an exhaust temperature of the engine is promoted.

Idling control device for vehicle

A driving torque control device for a hybrid vehicle has an engine torque estimation unit configured to estimate an engine torque by compensating for a retardation caused by a delay filter in an engine torque instruction value, and a retardation factor selection unit configured to select, as a retardation factor indicating a retardation degree of the delay filter, any one of an increase-side retardation factor for a case where the engine torque instruction value increases and a decrease-side retardation factor for a case where the engine torque instruction value decreases. The retardation factor selection unit performs switching between the increase-side retardation factor and the decrease-side retardation factor in a case where a difference between the engine torque estimation value and the engine torque instruction value as a filter input value is equal to or smaller than a predetermined value.

Driving torque control device for hybrid vehicle

A control system for a hybrid vehicle includes a mode selection unit for start request of an engine; a slip determination unit for determining whether or not a second clutch is allowed to slip; and a start determination unit for determining whether or not to allow the engine to start. The start determination unit prevents the engine from starting when an input rotation speed or an output rotation speed of an automatic transmission is less than a predetermined value in the presence of the start request of the engine from the mode selection unit and the slip determination unit determines that the second clutch is not allowed to slip.

Control device and control method for hybrid vehicle

A hybrid vehicle includes an engine, a motor, the engine and the motor being driving sources, a first traveling mode in which the vehicle is driven utilizing an output of the engine, and a second traveling mode in which the vehicle is driven through an output of the motor with the engine stopped. The hybrid vehicle further includes an air density detecting section configured to detect an air density of an environment under which the vehicle travels and, in a case where the detected air density is reduced with respect to a standard air density, the motor output in the second traveling mode is reduced with respect to the motor output in a standard air density such that a driving force of the vehicle in the second traveling mode when the traveling mode is switched approaches the driving force of the vehicle in the first traveling mode.

Hybrid vehicle

An engine intake valve timing control apparatus includes a fuel injection control section, a valve open timing control section, and a valve timing change rate setting section. The fuel injection control section is configured to control a fuel injection quantity of fuel injected from a fuel injector into an intake port of an engine in accordance with an operating condition of the engine. The valve open timing control section is configured to control an open timing of an intake valve to a target open timing. The valve timing change rate setting section sets a change rate at which the open timing of the intake valve is changed from a current open timing to the target open timing when the target open timing is updated, the change rate being set using a parameter relating to a vaporization rate of the fuel adhered to the intake port.

Engine intake valve timing control apparatus

An engine start control device for a hybrid vehicle equipped with an electric motor and an engine with an induction system, including a hybrid controller that performs an engine start determination to determine whether the engine should be started while the electric motor is running; an acceleration position sensor that detects an acceleration demand during the engine start determination; and a start/power generation motor that starts the engine, wherein the start/power generation motor controls the pressure in the induction system based on acceleration demand.

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Yamato, Japan

Takeshi Ohno