Denso Corporation

Advics Co., Ltd.

Takashi Satoh

Masayoshi Takeda

Yosuke Ohmori

Tatsuya Saito

Motoyoshi Hatta

Masanori Sugiura

Mitsuharu Higashitani

Mamoru Mabuchi

Mutsuaki Gotoh

Shuhei Oe

Satoru Mizuno

Hiroaki Ono

Taketsugu Sasaki

A vehicle control apparatus computes a fuel consumption decrease or a fuel consumption increase for each of a plurality of travel modes. The vehicle control apparatus includes a control section that calculates an engine efficiency of an engine and an MG-INV efficiency which is a combined efficiency of a motor generator and an inverter. The engine efficiency is calculated based on an engine power and an ideal fuel consumption line. The MG-INV efficiency is calculated based on an MG power. As such, based on the engine efficiency and the MG-INV efficiency, the control section computes the per-unit-electric-power fuel consumption decrease or the per-unit-electric-power fuel consumption increase.

Vehicle control apparatus

A vehicle control apparatus uses a travel mode selection unit to select between an EV travel mode, an engine travel mode, and an engine generation mode depending on comparisons between an engine generated power cost, an EV effect, and a surplus electric energy. In such manner, according to a travel condition of a vehicle, an appropriate travel mode is selected for an improvement of fuel consumption efficiency. The vehicle control apparatus also computes a fuel consumption decrease or a fuel consumption increase for each of a plurality of travel modes based on an engine efficiency and an MG-INV efficiency. In such manner, fuel consumption increase/decrease for every travel mode may be computed.

A vehicle controller performs a throttle-valve-late-close control in which the throttle valve is held open until a delay time has passed after the fuel cut is started, and an EGR-valve-open-close control in which the EGR valve is repeatedly opened and closed. Then, the throttle valve is closed and the EGR valve is opened. In a period from a latter period of an exhaust stroke to a preceding period of an intake stroke, a valve-overlap control is executed so that a variable valve timing controller is controlled to make both an intake valve and an exhaust valve opened. A pumping loss of an engine is sufficiently reduced and an energy-regenerate efficiency can be effectively improved.

Vehicle controller

An apparatus for controlling automatic stop/restart of an engine, includes: an automatic-stop/restart-control-unit which stops/restarts the engine; a brake-pressure-detection-unit which detects brake pressure in a brake system and controls the brake pressure to perform anti-skid control; a first-determination-unit which determines whether the brake pressure is not less than a first-threshold; a second-determination-unit which determines whether the brake pressure is not less than a second-threshold larger than the-first threshold; a stop-allowing-unit which allows the automatic-stop/restart-control-unit to stop the engine while the engine operates, when the first-determination-unit determines that the brake pressure is not less than the first-threshold and the second-determination-unit determines that the brake pressure is less than the second-threshold; and a stop-inhibiting-unit which inhibits the automatic-stop/restart-control-unit from stopping the engine while the engine operates, when the-first-determination-unit determines that the brake pressure is less than the first-threshold and the second-determination-unit determines that the brake pressure is not less than the second-threshold.

Apparatus for controlling automatic stop and restart of engine

An engine automatic stop and restart control apparatus is provided. The apparatus includes a control unit which stops and restarts an engine, an actual axle torque change speed calculation unit which calculates change speed in actual axle torque that is actually generated when the engine is restarted, an ideal axle torque change speed calculation unit which calculates change speed in ideal axle torque that corresponds to engine torque generated by the engine, a change speed difference calculation unit which calculates a change speed difference that is a difference between the change speed in actual axle torque and the change speed in ideal axle torque, and a vibration suppression control unit which executes a vibration suppression control for applying braking torque based on the change speed difference.

Engine automatic stop and restart control apparatus

A vehicle control apparatus includes: an automatic-stop-and-restart-control-unit stopping/restarting an engine, a brake-fluid-pressure-control-unit controlling wheel-cylinder-pressure using a brake-system, which intensifies brake-manipulation-force by a brake-booster to cause master-cylinder-pressure in a master-cylinder while the engine operates, and which transfers the master-cylinder-pressure to wheel-cylinders to cause the wheel-cylinder-pressure, the brake-system including an actuator automatically increasing pressure in the wheel-cylinders irrespective of the brake-manipulation-force; a negative-pressure-detection-unit which detects the vacuum-pressure; a first-determination-unit which determines whether the vacuum-pressure is not more than a first threshold while the engine stops, a restarting-unit which allows the automatic-stop-and-restart-control-unit to restart the engine when the first-determination-unit determines that the vacuum-pressure is not more than the first threshold; a second-determination-unit which determines whether the vacuum-pressure is not more than a second threshold; and a braking-boost-unit which allows the brake-fluid-pressure-control-unit to automatically increase the pressure in the wheel-cylinders when the second-determination-unit determines that the vacuum-pressure is not more than the second threshold.

Growing community of inventors

Okazaki, Japan

Takashi Satoh