Mazda Motor Corporation

Shingo Harada

Shin Takehara

Naoki Ikeda

Norihiko Nakao

Hirofumi Seni

Chiaki Santo

Yutaka Tukahara

Hidetoshi Nobumoto

Tetsuro Takaba

Yuji Shitani

Motonori Yoshida

Tetsuya Kyakuno

Kazuo Sasaki

Yoshiyuki Shinya

Shinichi Morinaga

Akitomo Kume

Issei Oiso

Hiroyuki Kisaka

A control device of a diesel engine is provided. The diesel engine includes an injector for injecting fuel into a cylinder, and a turbocharger for compressing intake air by using exhaust energy. The control device includes a calculating module for setting a basic injection timing determined according to an operating state of the engine, as a timing of injecting the fuel from the injector, and an injection control module for injecting the fuel from the injector at the set basic injection timing at least while the engine is in a steady operation.

Control device of diesel engine with turbocharger

A glowplug control device for controlling an applied voltage or power for a glowplug is provided, which includes a target calculating module for calculating a target applied voltage or power to adjust a glowplug temperature to a predetermined target temperature, an output module for applying the target applied voltage or power to the glowplug when the target applied voltage or power is below a maximum applicable voltage or power, and applying the maximum applicable voltage or power to the glowplug when the target applied voltage or power is above the maximum applicable voltage or power, and a temperature estimating module for estimating the glowplug temperature to be the target temperature when the target applied voltage or power is applied to the glowplug, and estimating the glowplug temperature to be below the target temperature by a temperature decrease amount when the maximum applicable voltage or power is applied to the glowplug.

Glowplug control device and method for estimating temperature of glowplug

An engine control system for diminishing driveline vibrations extracts resonant frequency component coincident in frequency with a driveline resonant vibration according to a gear ratio of a transmission of the driveline from a change in charging efficiency with time that is detected on the basis of a signal representative of an amount of intake air, converts the resonant frequency component to a demanded amount of engine torque reduction after having adjusted the resonant frequency component in phase, and causes the demanded amount of engine torque reduction by retarding an ignition timing and/or reducing an amount of fuel injection.

Control system for internal combustion engine

An automatic transmission control system causes a downshift to a gear which can provide an effect of engine braking greater than that provided before the downshift when the vehicle falls its speed with a specified rate of speed reduction as a result of footbrake application while the vehicle is traveling on a downgrade having a slope greater than a specified slope.

Control system for automatic transmission

An automatic transmission control system, which applies an ordinary gear shift control map set up for flat road driving and a downgrade gear shift set up for downgrade driving which has broadened range of driving conditions for lower gears, causes gear shifts according to the ordinary gear shift control map even during downward driving when an accelerator pedal is stepped on with intention of accelerating the vehicle.

Gear shift control system for automatic transmission

A vibration damping system for a vehicle includes a vibration sensor which detects vibration of a predetermined vibrating element on the vehicle, a vibrator which vibrates the vibrating element, and a drive control unit which controls the vibrator on the basis of the detecting signal from the vibration sensor so that a predetermined object vibration component of the vibration of the vibrating element is damped by the vibration generated by the vibrator. The drive control unit is restrained from controlling the vibrator according to the condition of a predetermined factor of the vehicle.

Vibration damping system for vehicle

A vibration damping system for a vehicle includes a vibration sensor which detects vibration of a particular vibrating element, an actuator which applies vibration to the particular vibrating element and a controller which receives a vibration signal output from the vibration sensor and controls the actuator to apply to the particular vibrating element such vibration that damps the vibration detected by the vibration sensor. The controller is provided with a sensitivity changing circuit which changes the sensitivity of the vibration sensor according to a predetermined condition of the vehicle.

A vibration damping system for a vehicle has a vibration sensor which detects vibration of solid elements on the vehicle and vibration of air inside the vehicle. A first vibrator supports a power unit relative to the vehicle body and directly vibrates the vehicle body. A second vibrator directly vibrates air inside the vehicle body. A drive control unit performs calculation on the basis of a detecting signal from the vibration sensor and controls the first and the second vibrators on the basis of the result of the calculation so that the vibration of the solid element and the vibration of air inside the vehicle body are damped. The vibrator control ratio of the first and second vibrators is changed according to the condition of a predetermined factor of the vehicle.

Growing community of inventors

Hatsukaichi, Japan

Shingo Harada