公开(公告)号：US09670837B2

公开(公告)日：2017-06-06

申请号：US14579510

申请日：2014-12-22

Applicant: HITACHI KOKI CO., LTD.

Inventor： Hiroshi Honzawa ,  Shigetoshi Ishida

IPC: F02D9/02 ,  F02B63/02 ,  F02M35/10 ,  F02D41/14 ,  F02P9/00 ,  F02P11/02 ,  F02D9/10 ,  F02D31/00 ,  F01P5/04 ,  F01P5/02

CPC classification number: F02B63/02 ,  F01P5/02 ,  F01P5/04 ,  F02D9/1065 ,  F02D31/00 ,  F02D41/1498 ,  F02D2009/0203 ,  F02D2009/0208 ,  F02D2200/101 ,  F02D2400/06 ,  F02M35/1017 ,  F02M35/10196 ,  F02P9/005 ,  F02P11/02

Abstract: An engine-powered work tool includes an engine having a crank shaft, an ignition system, an output controller having a throttle valve shaft for controlling output of the engine, a wind governor connected to the throttle valve shaft, a rotation speed detector and an ignition control unit. The wind governor includes a governor plate movable upon receipt of cooling air generated by a cooling fan to control an angular rotation of the throttle valve shaft. The rotation speed detector detects a rotation speed of the crank shaft. The ignition control unit controls the ignition system based on the rotation speed of the crank shaft detected by the rotation speed detector to reduce the output of the engine when the rotation speed detector determines that the governor plate exceeds a predetermined position.

公开(公告)号：US20150184595A1

公开(公告)日：2015-07-02

申请号：US14579510

申请日：2014-12-22

Applicant: HITACHI KOKI CO., LTD.

Inventor： Hiroshi Honzawa ,  Shigetoshi Ishida

IPC: F02D9/02 ,  F02B63/02 ,  F02P9/00 ,  F01P5/04

CPC classification number: F02B63/02 ,  F01P5/02 ,  F01P5/04 ,  F02D9/1065 ,  F02D31/00 ,  F02D41/1498 ,  F02D2009/0203 ,  F02D2009/0208 ,  F02D2200/101 ,  F02D2400/06 ,  F02M35/1017 ,  F02M35/10196 ,  F02P9/005 ,  F02P11/02

Abstract: An engine-powered work tool includes an engine having a crank shaft, an ignition system, an output controller having a throttle valve shaft for controlling output of the engine, a wind governor connected to the throttle valve shaft, a rotation speed detector and an ignition control unit. The wind governor includes a governor plate movable upon receipt of cooling air generated by a cooling fan to control an angular rotation of the throttle valve shaft. The rotation speed detector detects a rotation speed of the crank shaft. The ignition control unit controls the ignition system based on the rotation speed of the crank shaft detected by the rotation speed detector to reduce the output of the engine when the rotation speed detector determines that the governor plate exceeds a predetermined position.

Abstract translation: 发动机动力作业工具包括具有曲轴，点火系统，具有用于控制发动机输出的节流阀轴的输出控制器，连接到节流阀轴的调速器，转速检测器和点火器 控制单元 风力调节器包括调节器板，该调速器板在接收到由冷却风扇产生的冷却空气时可移动，以控制节流阀轴的角度旋转。 转速检测器检测曲柄轴的转速。 点火控制单元基于由转速检测器检测到的曲轴的转速来控制点火系统，以便当转速检测器判定调速器板超过预定位置时，减小发动机的输出。