Engine controller

Abstract

Abstract PURPOSE:To obtain the effect of energy saving or favorable workability corresponding to the working condition in such a way that resistance in the duct of a hydraulic device can be selected and changed over at the time of transferring the engine from its high speed revolution to its low speed revolution. CONSTITUTION:When a change-over valve 20 is manually changed over to a position 1, the pressurized oil in a pump 8 actuates a change-over valve 7 and arrives at the change-over valve 20 upon control of a lever 9. Since duct resistance for a throttle valve 23 is large, the pressurized oil is quickly fed to a cylinder 12, a piston 13 is moved to the right, and the engine 1 makes its high speed revolution. When the lever 9 is returned to its neutral position, the piston 13 is moved to the left, and the revolution speed of the engine 1 is lowered, or the pressurized oil can not be quickly returned to a tank 5, and the descent time is made longer. Besides, when the valve 20 is changed over to the position II, and a control lever 9 is returned to its neutral position, the pressurized oil on the rod side of the cylinder 12 is returned to the tank 5 the piston 13 is also quickly moved to the left, the injecting rate is reduced at once, and the descent time is made shorter.

Inventors

• 👤 Toshihiro Ono
• 👤 大野　俊弘

Bibliographic Details