Yanmar Co., Ltd.

Yanmar Power Technology Co., Inc.

Hiroyuki Machiyama

Ryota Iwano

Hideo Shiomi

Isao Takagishi

Masaki Nanko

Kenichi Nakaguchi

Yusei Fukuda

Taichi Togashi

Masamichi Tanaka

Ryosuke Okamoto

Yoshiaki Shibata

Satoshi Hiroya

Kosuke Hara

Nobuyoshi Fukae

Shigeki Tada

Provided is a fuel injection device for engines, configured using a technique which can extend service life while good responsiveness is maintained. This fuel injection device for engines is provided with: a control rack supported so as to be slidable in an axial direction and configured so that the amount of fuel delivered under pressure by a fuel pumping mechanism can be adjusted by changing the sliding position of the control rack in the axial direction; an actuator which can move forward and backward an operation section; and a link lever which is supported in a rockable manner by a support shaft and which rocks as the operation section of the actuator moves forward and backward, thereby sliding the control rack. The fuel injection device for engines is further provided with an actuator-side connection section for connecting the operation section of the actuator to the link lever. The actuator-side connection section is disposed coaxially with the operation section of the actuator.

Fuel injection device for engine

A technology that can extend the life of a fuel injection device of an engine while maintaining its good responsiveness is provided. A fuel injection devicefor an engine includes: a control racksupported to be slidable in an axial direction and capable of adjusting of a fuel pressure-feed amount of a fuel pressure-feed mechanism unit, based on its slide-position relative to the axial direction; an actuatorcapable of reciprocating its operating unit; and a link leverswingably supported by a pivot shaft memberand configured to swing in association with reciprocation of the operating unitof the actuatorthereby causing the control rackto slide, wherein the fuel injection device includes an actuator-side connecting partA connecting an operating unitof the actuatorto the link lever, and the actuator-side connecting partA is positioned on the same axis as the operating unitof the actuator

Fuel injection device for engines

A fuel injection pump () provided in a diesel engine, including: an electromagnetic spill valve () configured to adjust a fuel injection amount by releasing a pressurized fuel with opening/closing of a spill valve body (); and an ECU (Engine Control Unit,) configured to form a current waveform of drive current of the electromagnetic spill valve (). The ECU (), during the warm state, detects a valve-close timing of the electromagnetic spill valve (), forms an optimum current waveform of drive current based on the detected valve-close timing, and applies drive current with thus formed optimum current waveform to the electromagnetic spill valve (), whereas, during the cold state, the ECU () applies only drive current with a pre-set current waveform to the electromagnetic spill valve ().

Fuel injection pump

The application is directed to a diesel engine. If the rack cannot complete a predetermined operation within a predetermined amount of time due to the key switch being held at a start-position, the control unit controls a starter to cause a plunger to perform a preparatory stroke operation, and the stroke operation by the plunger is stopped before the diesel engine starts.

Diesel engine

A fuel injection pump provided with a diesel engine having a starter started up by a key switch. The fuel injection pump comprises a cold start device having a sparking actuator, the starter and the sparking actuator. The fuel injection pump includes an activator that activates the sparking actuator whenever the key switch is switched on.

Cold start device for fuel injection pump

A fuel injection device of a diesel engine capable of smoothly starting the diesel engine to match an environment around the engine by saving fuel, reducing the exhaustion of carbon dioxide, and suppressing black smoke in starting the diesel engine. A rack is operated by an actuator from a lowest rack position to a starting increased fuel amount position at a lower speed than that at which the rack is operated by the actuator from the lowest rack position to the starting increased fuel amount position at the maximum operating speed. The operating speed of the rack is set in two stages, and the later operating speed of the rack is reduced less than the operating speed of the rack up to a set intermediate rack target value P. Then, the operating amount of the rack per hour is reduced after the ignition of the engine is recognized. Also, the operating speed of the rack is controlled according to an atmospheric temperature in starting the engine.

Growing community of inventors

Osaka, Japan

Hiroyuki Machiyama