Mazda Motor Corporation

Hiroaki Deguchi

Yasushi Niwa

Kazuya Niida

Amane Tsuda

Masaki Fukuma

Masami Nishida

Kazuaki Nishimura

Nobuo Yunoki

Kenjiro Konomi

Akira Asai

Satoshi Nishizaka

Hiroyuki Oda

Hidesaku Ebesu

Hirokazu Matsuura

Tsuyoshi Tsuchida

Kentaro Nomura

Takashi Ikai

Nobuo Doi

Yoshitsugu Hanada

Setsuo Harada

Hirofumi Ohshima

Toru Kurisu

Isamu Iguchi

Kouji Asanoumi

Hitoshi Hongo

Hiroaki Sugiura

Hiroshi Enomoto

Masunori Kanda

Eiichi Yanagida

Hiroshi Aino

Noriyuki Maruoka

Disclosed is a controller for a turbocharged engine. The engine includes a supercharger configured to supercharge intake air using an exhaust gas from the engine, and including movable flaps arranged so that a boost pressure generated in an intake passage is adjustable. If a rotational speed of a turbine and compressor that constitute the supercharger has reached a first threshold lower than an endurance limit, an amount of fuel injected to the engine is reduced to a predetermined amount. If the rotational speed has reached a second threshold lower than the first threshold, the amount of fuel injected is reduced in accordance with an excess of the rotational speed over the second threshold.

Control device for engine equipped with turbo-supercharger

An abnormality detector of a turbocharged engine includes: a compressor including a plurality of blades that are detected portions; and a detecting portion configured to electrically detect the plurality of blades. Each time the blades are detected a predetermined number of times, one pulse having a pulse width corresponding to a measurement time required to detect the blades is output, and a turbo revolution is calculated from the pulse width of the output pulse. When it is judged that a rotation change of the rotating body which change is calculated based on a pulse width of a first pulse and a pulse width of a second pulse output after the first pulse exceeds a predetermined rate in a region where the rotating body exceeds a predetermined revolution, it is determined that an abnormality of the blade or an electromagnetic noise abnormality of the detecting portion occurs.

Abnormality detector of turbo-charged engine

An exhaust device for an engine includes an engine main body having a cylinder head provided with a manifold exhaust passage formed with a gathering exhaust port, a turbo supercharger, a catalyst device provided adjacent to the turbo supercharger, and a processing device disposed on the same side as the cylinder head surface of the engine main body. The processing device includes an exhaust gas processing device and an EGR device. The turbo supercharger guides exhaust gas discharged from the gathering exhaust port upward. The catalyst device includes a carrier, and a container which allows the exhaust gas to pass through a lower region of the carrier. The EGR device and the exhaust gas processing device are at least disposed below the catalyst device.

Exhaust device for engine

A first turbocharger comprises a first center housing and a first return passage. A second turbocharger comprises a second center housing and a second return passage. The first return passage joins the second return passage at a junction. The length of the second return passage from the second center housing to the junction is longer than that of the first return passage from the first center housing to the junction. A bellows-shaped vibration absorption portion is provided at the second return passage. The first return passage comprises a first upstream return passage and a first downstream return passage, and the first upstream and downstream return passages are connected to each other via the flexible hose.

Lubrication device of turbocharger of engine for vehicle

There are provided first and second water supply passages to supply cooling water from an engine to first and second center housings of first and second turbochargers, and first and second return passages to return the cooling water from the first and second turbochargers to the engine. A cooling-water connection portion of the first water supply is located above the level of a cooling-water connection portion of the second water supply passage. A vapor releasing passage is provided between the second turbocharger and an upper tank provided on the outside of an engine body at a position located above the connection portion of the second return passage of the second turbocharger. Accordingly, the function of vapor releasing from the first and second turbochargers can be improved, thereby increasing the layout flexibility around the engine.

Cooling device of turbocharger of engine for vehicle

A cylinder head includes a carrier member integrally formed with a vertical wall portion for supporting a camshaft a tappet guide for containing a tappet and a tappet-lubricating oil receiving portion slanted around the tappet guide An operation-oil supply passage extends in the longitudinal direction of the carrier member inside the tappet guide

Cylinder head structure

An internal combustion engine is equipped with a valve timing controller capable of minimizing the electric power consumption and frictional wear of elements. The valve timing controller can vary the valve timing of valves. A camshaft is moved axially forwardly or rearwardly by electrically energizing an outer solenoid clutch or a brake releasing solenoid, respectively. An axial movement of the camshaft results in a change in valve timing. With the exception of a transient period during which the valve timing is being varied, both the brake releasing solenoid and the outer clutch are electrically deenergized to thereby reduce the electric power consumption, and both of them are maintained out of contact with a displaceable disc 13 to thereby reduce frictional wear thereof.

Valve timing controller for use with internal combustion engine

An intake valve or an exhaust valve is lifted through a swingable cam by the rotation of a rotatable cam formed in the cam shaft. A surface at which the swingable cam abuts with the rotatable cam is tapered in the axial direction in which said cam shaft extends, and the valve shift timing is changed by transferring the cam shaft, that is, the rotatable cam in the axial direction in which said cam shaft extends. The power transmitting member such as a helical gear to be rotated with the output shaft of the engine is engaged with the cam shaft through a helical spline. The power transmitting member is so arranged as to be unmovable in the axial direction in which said cam shaft extends. The rotational phase of the rotatable cam relative to the output shaft of the engine is changed by displacement of the cam shaft relative to the power transmitting member in the axial direction in which said cam shaft extends.

System for controlling valve shift timing of an engine

A transmission structure for an automotive vehicle having a power unit includes an engine and a transmission device, including a power transmitting device connected to an output shaft of the engine, for transfer from an output of the engine to the transmission device. A first housing for the power transmitting device, a second housing for the transmission device, connected to the first housing, a differential device, housed in the first housing and positioned so as to be offset from an output shaft of the engine, and a reinforcement element, having one end portion connected to an upper surface of the first housing and another end portion connected to both side surfaces of the second housing, are provided.

Transmission structure for an automotive vehicle

An internal combustion engine comprises reinforcing means secured to an edge portion of a lower opening of the cylinder block at a peripheral edge portion thereof. The reinforcing member has a plate-like shape, has connecting parts extending laterally with respect to the direction of the engine for connecting the facing edge portions of the lower opening of the cylinder block and is formed with openings for passage of oil at the front portion thereof and is secured to an oil pan at the lower surface of its front portion. The rear portion of said reinforcing means forms a part of an outer lower wall of a crank case containing a crank shaft and bifurcates into an upper branch extending backwardly and upwardly and a lower branch extending backwardly and downwardly. The upper branch has an end portion for connection with the cylinder block and the lower branch has an end portion for connection with a transmission case.

Internal combustion engine having reinforced structure

Growing community of inventors

Hiroshima, Japan

Hiroaki Deguchi