Hitachi Automotive Systems, Ltd.

Hitachi Astemo Ltd.

Yoshiaki Nagasawa

Toshio Hori

Kohei Suzuki

Shigenori Nakazato

Kenichi Machida

Shigehiko Omata

Hiroyasu Kuniyoshi

Minoru Ohsuga

Shinya Sato

Yoshihiro Sukegawa

Masayuki Saruwatari

Masanori Watanabe

Akira Nishioka

Naoyuki Tashiro

Koji Matsufuji

Koji Onishi

Atsushi Saeki

Norio Yanagawa

Shingo Kitajima

Ryuu Kai

Eiichi Otsu

Provided is an internal combustion engine control unit that controls an engine by detecting combustion characteristics with a simple configuration robust to disturbance such as noise. Therefore, the internal combustion engine control unit (ECU) of the present embodiment includes a rotational speed calculation unitthat calculates a crank rotational speed of an internal combustion engine (engine); an extreme value timing calculation unitthat calculates an extreme value timing of the crank rotational speed calculated by the rotational speed calculation unit; and a combustion state estimation unit (combustion phase calculation unit) that estimates a combustion state based on the extreme value timing of the crank speed calculated by the extreme value timing calculation unit

Internal combustion engine control unit

In a constant-speed traveling mode or a follow-up traveling mode, reduction of fuel consumption and improvement of drivability are both achieved. An ECUhas an ISG connected to an engine and a battery connected to the ISG. The ECUhas an ISG control unitthat performs control for supplying power to the ISG from the battery to rotationally drive the ISG, or to drive the ISG to generate power for charging the battery. In one cycle of a traveling mode until completion of deceleration traveling after acceleration traveling is started so as to achieve a target vehicle speed, the ISG control unitdrives the ISG such that a remaining charge amount of the battery falls within a set range at completion of the deceleration traveling, and a traveling acceleration/deceleration falls within a predetermined requested acceleration/deceleration.

Hybrid vehicle cruise control device

There is provided a vehicle-mounted control device that, when a restart request is generated during a time interval between the fulfillment of an engine automatic stop condition and complete stop, decreases a charging efficiency of an engine by means of at least one of a throttle valve and an intake valve to prevent an increase in the reverse rotational frequency of the engine, thereby ensuring the durability of the starting device of the engine, and preventing an accelerator response from deteriorating when a restart request based on the accelerator operation is generated. In the vehicle-mounted control device that controls a charging efficiency of the engine on the basis of the requested engine output amount, the engine is automatically stopped when a predetermined automatic stop condition is fulfilled, and a charging efficiency at the time when a restart condition of the engine has been fulfilled on the basis of an engine output request generated during a time interval between the fulfillment of the automatic stop condition and complete stop of the engine is made lower than a charging efficiency for the requested engine output amount.

Vehicle-mounted control device

While a vehicle is coasting with an engine being automatically stopped and a power transmission path between the engine and wheels being disengaged, when a deceleration request is made and the engine is restarted with the power transmission path being engaged, a deceleration level increases relative to the deceleration level required by a driver or the vehicle, thereby lowering drivability. A vehicle control apparatus includes a deceleration level control unit that controls the deceleration level of the vehicle such that, during travelling of the vehicle continuing to travel with a power transmission mechanism between the engine and the wheels being disengaged, when the deceleration request is made and the engine is started by an engagement of the power transmission mechanism, the deceleration level becomes a target deceleration level calculated from a first target deceleration level generated after the engagement of the power transmission mechanism is complete and a second target deceleration level generated in response to the deceleration request.

Vehicle control device

Provided is a system of carrying out engagement of a pinion and a ring gear at optimal timing and suppressing a bite-in sound, in a vehicle including an idle stop system. In a vehicle control device including an automatic stop unit which automatically stops an engine on the basis of an operating state of a vehicle; an automatic start unit which controls a starter during a period until the engine completely stops after the automatic stop unit executes the automatic stop of the engine, and restarts the engine; and an engine rotation detection unit which detects or operates a crank phase or a rotation number of the engine, the automatic start unit determines a control command of the starter at an interval shorter than an update interval of a signal of the engine rotation detection unit.

Onboard controller

The purpose of the present invention is to swiftly start up an engine in a range in which electrical equipment having electric power supplied thereto by a battery is not reset, even in cases when the battery is insufficiently charged and the battery is deteriorated. An engine start-up device according to the present invention starts up an engine by transmitting, to the engine, the rotary force of a direct-current motor driven by a battery. The engine start-up device is provided with: a battery-voltage acquisition unit for acquiring the battery voltage of the battery; a target-current-value calculation unit which calculates, on the basis of the battery voltage acquired by the battery-voltage acquisition unit, a target current value for a motor current to be supplied from the battery to the direct-current motor; and a motor-current control unit for controlling a switching element which is connected to the direct-current motor, and through which the motor current flows, such that the motor-current value of the motor current approaches the target current value.

Engine start-up device, and engine-start-up control method

Vehicle engine starting apparatus of automatically restarting an engine by quickly responding to a subsequent engine restart request even if engagement of a pinion gear with a ring gear is failed in the process of a stop of the engine. Pinion gear is displaced such that the pinion gear is engaged with the ring gear at a timing (when rotation speed of the pinion gear and rotation speed of the engine are nearly synchronized with each other with a signal from a control device when a predetermined condition is met. Where an engagement sensor has transmitted a signal 'H' indicating engagement failure, when restart of the engine becomes necessary, the pinion gear is displaced toward a ring gear side by the control device.

Vehicle engine starting apparatus

There is provided an idle stop system that can more quickly restart with small noise in conducting idle stop. In preparation for a restart request during an engine inertial rotation, after a motor is rotated in a state where a starter motor is not coupled to the engine, a pinion is engaged with a ring gear during the motor is subjected to inertial rotation like the engine. In this situation, the rotational speed including future pulsation of the engine is estimated with the use of information on the crank angle, and a pinion pushing timing is controlled so that the pinion and the ring gear contact each other with a given rotational speed difference taking a delay time of a pinion pushing unit into consideration.

Idle stop control method and control device

A vehicle control device, including a vehicle control unit that controls engagement between an engine and a starter motor for starting the engine, wherein the vehicle control unit, along with cutting off fuel supply to the engine and causing the engine to rotate inertially, also, in a state in which fuel supply to the engine is cut off and the starter motor is not engaged with the engine, rotates the starter motor, and thereafter controls supply of electrical power to the starter motor so as to causes the starter motor to rotate inertially, and engages the starter motor to the engine while both the engine and the starter motor are performing inertial rotation.

Growing community of inventors

Hitachinaka, Japan

Yoshiaki Nagasawa