Nissan Motor Company Limited

Other

Bridgestone Corporation

Takanobu Sugiyama

Shinichi Takemura

Shunichi Aoyama

Tsuneyasu Nohara

Ryosuke Hiyoshi

Tsuyoshi Arinaga

Shin Ishizaki

Toru Noda

Takayuki Hamamoto

Hidehiro Fujita

Hiroshi Kojima

Yoshiaki Tanaka

Makoto Nakamura

Seinosuke Hara

Akira Ueki

Katsuya Moteki

Naoki Okamoto

Yukihiro Sugimoto

Toru Fukami

Akinori Suzuki

Masahiko Kondo

Yoshiyasu Kimura

Yuusuke Satou

Yuta Kanashima

Humiharu Kurose

Mitsuo Gunji

In inline four cylinder internal combustion engine (), exhaust ports for a #cylinder and a #cylinder merge inside cylinder head () and form an opening serving as a single collective exhaust port. Exhaust manifold () has individual exhaust pipes () for #and #cylinders and collective exhaust pipe (), and the leading ends of these three exhaust pipes () are connected to catalytic converter (). Exhaust gas introduction angle (&#x3b8;) of each of individual exhaust pipes () is larger by 30-60 degrees than exhaust gas introduction angle (&#x3b8;) of collective exhaust pipe (). Consequently, flow velocity distribution and temperature distribution in a catalyst carrier become uniform.

Exhaust device for internal combustion engine

In an in-line four-cylinder internal combustion engine, exhaust ports () of cylinders #2 and #3 merge together inside a cylinder head and become open as one flat collective exhaust port (). An exhaust manifold () includes separate individual exhaust pipes () for cylinders #1 and #4 and a collective exhaust pipe () for cylinders #2 and #4. Tip ends of these three exhaust pipes are connected to a catalytic converter (). An equivalent diameter of the collective exhaust port () is larger than equivalent diameters of the exhaust ports () before merging. A short diameter of the collective exhaust port () is smaller than or equal to the equivalent diameters of the exhaust ports ().

Exhaust device for four-cylinder internal combustion engine

A torque rod () has two elastic bushes () to be mounted respectively to a vibration-generating side and a vibration-receiving side, and a connecting rod () connecting the two elastic bushes (). The actively controlled vibration cancellation means () is an actuator including: the shaft () having two opposite ends mounted to the connecting rod () and extending in an axial direction of the connecting rod (), the mass member () shaped in a tube to surround the shaft (); a coil () and a winding core () fixed to the shaft () in the tube-shaped mass member (); a permanent magnet () mounted to an inner peripheral surface of the tube-shaped mass member () or the shaft (), and a connecting member () for connecting at least one end of the tube-shaped mass members () to the shaft ().

Torque rod and engine mounting system for using same

A valve operating device that opens and closes a valve of an internal combustion engine by driving a valve stem in an axial direction includes a rocker cam that rocks in accordance with a rotation of a drive shaft and has a driving cam portion and a lift restricting cam portion; a cam follower that lifts the valve by contacting the driving cam portion slidingly; and a restricting member that prevents the cam follower from separating from the driving cam portion in cooperation with the lift restricting cam portion. A gap is formed between the restricting member and the rocker cam in a state where the cam follower is in contact with the driving cam portion and disappears such that the restricting member and the rocker cam come into contact with each other only when the cam follower separates from the driving cam portion.

Valve operating device for internal combustion engine

There is provided a system for controlling an intake valve of an internal combustion engine, including a variable valve mechanism having a control shaft to continuously vary a valve lift amount of the intake valve according to a rotational angle of the control shaft and an actuator to drive the control shaft, and a control unit that controls the actuator so as to set the control shaft to a first rotational angle position at which the valve lift amount takes a first value during an engine idling period and to a second rotational angle position at which the valve lift amount takes on a second value larger than the first value to provide a required intake quantity to start the engine during a time from the beginning of an engine speed decrease period, through an engine stop period, until the completion of a cranking period of the engine.

Intake valve control system and method for internal combustion engine

A variable compression ratio mechanism that changes the compression ratio according to the rotation angle of a control shaft, wherein a stopper is provided at the highest compression ratio side for regulating the rotation of the control shaft. Then, the output detected by a compression ratio sensor for detecting the rotation angle of the control shaft when the stopper is in an abutted state is read. An adjustment value is learned in order to revise the sensor output based on the detected output.

Internal combustion engine that uses a variable compression ratio device

An intake control apparatus for an internal combustion engine includes a variable valve operating mechanism capable of varying a lift and operation angle of an intake valve continuously and a control unit that controls an intake air amount by varying the lift and operation angle of the intake valve in accordance with an operating condition of the engine. The control unit has a learning section that learns a controlled position of the variable valve operating mechanism at a learning position that is a predetermined lift and operation angle located between a minimum value and a maximum value of the lift and operation angle that can be actually realized by the variable valve operating mechanism.

Intake control apparatus and method for internal combustion engine

An intake valve control apparatus for an internal combustion engine includes a first variable valve operating mechanism capable of varying an operation angle of an intake valve continuously, a second variable valve operating mechanism capable of varying a maximum lift phase of the intake valve continuously, and a controller that controls an intake air amount mainly by varying the operation angle and the maximum lift phase of the intake valve. The controller is configured to, when one of the first and second variable valve operating mechanisms is at a phase position different from a predetermined start stage phase position at engine start, correct a phase position of the other of the first and second variable valve operating mechanisms in accordance with a present phase position of the one of the first and second variable valve operating mechanisms. An intake valve control method is also provided.

Intake valve control apparatus and method for an internal combustion engine

A control apparatus for an internal combustion engine includes a variable compression ratio mechanism capable of varying a compression ratio of the engine, a compression ratio setting section that sets a compression ratio to be attained by the variable compression ratio mechanism in accordance with an operating condition of the engine, a knock detecting section that detects a knock occurrence state, an ignition timing learning correcting section that determines a learning correction value of an ignition timing in accordance with the knock occurrence sate, and a compression ratio correcting section that corrects the compression ratio set by the compression ratio setting section in accordance with the learning correction value of the ignition timing. A control method is also provided.

Control apparatus and method for internal combustion engine with variable compression ratio mechanism

A lift and operating angle varying mechanism is arranged to vary an intake valve operation angle and an intake valve lift of the engine continuously by rotating a control shaft with an actuator disposed at an end of the control shaft which is rotatably supported by a plurality of bearings. A lubricating oil is supplied to the bearings so as to reduce nonuniformity in temperature distribution of the control shaft in the longitudinal direction.

Variable valve actuating mechanism for internal combustion engine

An intake system for an internal combustion engine is provided which comprises a variable valve control apparatus capable of variably and continuously controlling the amount of intake air of an internal combustion engine by varying valve lift characteristics of an intake valve, a collector fluidly connected with a plurality of intake passages for cylinders of the internal combustion engine, and a pressure control mechanism for producing within the collector a vacuum that increases with increase of one of the amount of intake air, engine speed and engine load of the internal combustion engine.

Intake system for an internal combustion engine

An internal combustion engine has a variable compression ratio mechanism operatable during an intake stroke to change an actual compression ratio of the engine, and is capable of correcting an amount of fuel injected into the engine in response to a change in the compression ratio.

Internal combustion engine having variable compression ratio mechanism and control method therefor

In a compression ratio controlling apparatus and method for a spark-ignited internal combustion engine, the variable compression ratio mechanism is controlled by a compression controlling section on the basis of a detected engine speed and engine load in such a manner that the compression ratio is varied toward a target high compression ratio when the engine load falls in a predetermined low load region and toward a target low compression ratio when the engine load falls in a predetermined high load region and a predetermined delay is provided in a variation in the compression ratio toward one of the target high and low compression ratios in accordance with at least one of an engine driving history immediately before a transient state of a change in the engine load occurs and a wall temperature of a combustion chamber of the engine immediately before the transient state thereof occurs.

Compression ratio controlling apparatus and method for spark-ignited internal combustion engine

A collector equipped intake system of an internal combustion engine, the collector is fixedly connected directly to either of a cylinder-head side wall and a collector mounting bracket hermetically covering perimeters of intake-port opening end portions of a plurality of intake ports opening through the side wall. A plurality of intake-manifold branches respectively communicating with the plurality of intake ports, are protruded into the interior space of the collector.

Intake system of internal combustion engine

A control system for an internal combustion engine having a variable valve operating mechanism capable of varying at least one of a valve lift and an operation angle of an engine valve continuously is provided. The control system comprises a detecting device that detects an operating condition of the variable valve operating mechanism and produces a signal representative thereof, and a controller that controls the operating condition of the variable valve operating mechanism in response to the signal from the detecting device. The controller is programmed to determine whether an operation responsiveness of the variable valve operating mechanism is lowered based on the signal from the detecting device and vary operational characteristics of the variable valve operating mechanism when the operation responsiveness of the variable valve operating mechanism is lowered. A control method is also provided.

Growing community of inventors

Yokohama, Japan

Takanobu Sugiyama