Kubota Corporation

Tamotsu Kuno

Katsushi Inoue

Koichi Funaki

Akihiko Kai

Yuuji Takemura

Tomoya Hasegawa

Kentarou Kita

Hiroki Oso

Yasuo Fujii

Masayasu Takami

Yuuki Ishii

Masanori Fujiwara

Kentaro Kita

Yuki Yoshita

Koji Okada

Yusuke Komemushi

Kazuaki Koyama

Osamu Yoshii

Gen Nakamura

Wataru Miyauchi

Ryota Kimura

A hybrid system which can calculate various type of more proper required torques is provided while input factors which can be used for calculating the various types of required torques are limited. A hybrid systemincludes a rotation sensorwhich detects a rotation number of an engine, at least either one of an accelerator opening-degree sensorwhich detects an accelerator opening degree and a rotation-number instruction unitwhich transmits a rotation-number signal instructing a certain rotation number to the engine, and a control unitwhich controls an operation of the engine. The control unitexecutes control of calculating a torque determining factor for determining a system required torque as the hybrid systemon the basis of at least either one of the accelerator opening degree detected by the accelerator opening-degree sensorand the rotation-number signal transmitted by the rotation-number instruction unitand control of calculating the system required torque on the basis of the rotation number detected by the rotation sensorand the calculated torque determining factor.

Hybrid system

In an industrial hybrid engine, an endless rotary band wound around a drive pulley of a crankshaft and a motor pulley of an electric motor for power is provided. The electric motor is attached to an engine body by using a support bracket. A tension mechanism is supported by the support bracket, the tension mechanism tensioning the endless rotary band in a direction in which the endless rotary band is stretched. A second support bracket that supports the electric motor separately from the support bracket is provided.

Industrial hybrid engine

A breather device for an engine which prevents a blow-by gas outlet passage from being blocked due to freezing, is provided, which includes a valve holder in a cylinder head cover and a breather valve supported by the holder. The holder includes a holder body having a valve port of the breather valve, a metal outlet passage pipe having a blow-by gas outlet passage formed inside, the blow-by gas outlet passage communicating with the valve port and being located below the valve port, and a heater that heats the outlet passage pipe. An outer peripheral surface of the outlet passage pipe is wrapped with the holder body formed of a material having lower thermal conductivity than that of the outlet passage pipe. The holder body has a heater insertion port, and the heater is inserted from the heater insertion port toward a heat input wall of the outlet passage pipe.

Breather device for engine

There is provided an exhaust treatment device for a diesel engine that can prevent unnecessary alarm for ash deposition from being issued. In the exhaust treatment device, a timer measures integrated time of a state of non-regenerative operation which ranges from an end of DPF regeneration to a next time point where the differential pressure reaches a regeneration request value. A counter acquires the short interval count if the integrated time is a short interval shorter than a predetermined decision time. An alarm device issues an alarm if the consecutive short interval count reaches a predetermined plural necessary count for alarm. A short interval count having been already acquired is preferably reset to 0 if the integrated time of the state of non-regenerative operation is a long interval, not shorter than a predetermined decision time, before the short interval count reaches the predetermined necessary count for alarm.

Exhaust treatment device for diesel engine

The present invention provides a diesel engine capable of preventing a PM accumulation amount from increasing excessively. If DOC inlet exhaust gas temperature ('IEGT') does not reach a predetermined value T0, a control unit carries out air intake amount feedback control ('AIAFC'), and a target value of intake throttling is set to a predetermined air intake amount. If the DPF regenerating processing is not started even if elapsed time reaches a predetermined value t after AIAFC is started in a state where the DOC IEGT does not reach the predetermined value T0, the control unit changes AIAFC to exhaust gas temperature feedback control (&#x201c;EGTFC&#x201d;). In EGTFC, the control unit changes a target value of intake throttling to a predetermined DOC IEGT T0. If application of a load exceeding a predetermined amount is detected before the DOC IEGT reaches the predetermined value T0, the control unit returns EGTFC to AIAFC.

Diesel engine with reduced particulate material accumulation and related method

It is an object of the invention to provide a multi-cylinder diesel engine in which a thermal damage of a common rail, and a rise in fuel temperature can be suppressed. In order to achieve the object, a multi-cylinder diesel engine in which, while the extension direction of a crank shaftis set to the anteroposterior direction, a common railwhich is directed in the anteroposterior direction is placed above an intake manifold, and an engine cooling fanis placed in front of the engine is configured so that the width direction of the engine which is perpendicular to the anteroposterior direction is set to the lateral direction, an air intake portionof the intake manifoldis placed on the outer lateral side of the both lateral sides of the common rail, the outer lateral side being opposite to a head cover, and the common railis placed in a place to which engine cooling air produced by the engine cooling fanis blown.

Multi-cylinder diesel engine

Growing community of inventors

Sakai, Japan

Tamotsu Kuno