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Clutch and throttle system for remote control of engine speed

  • US 4,579,209 A
  • Filed: 04/30/1984
  • Issued: 04/01/1986
  • Est. Priority Date: 04/30/1984
  • Status: Expired due to Fees
First Claim
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1. A control system for disengaging a clutch between an engine and a load thereon and for varying the operating speed of the engine comprising:

  • clutch disengaging means including a pneumatic actuator connected to said clutch,throttle control means for adjusting the speed of said engine including a hydraulic actuator,hydraulic fluid reservoir means,means connecting a lower portion of said fluid reservoir means to said hydraulic actuator,an electrically actuated solenoid valve means located in said connecting means for blocking or permitting flow of hydraulic fluid from said fluid reservoir means to said hydraulic actuator,air supply means for pressurizing an upper portion of said fluid reservoir means and for supplying compressed air to said pneumatic actuator and said hydraulic actuator,an electrically actuated clutch solenoid valve connecting said air supply means to said pneumatic actuator,an electrically actuated throttle solenoid valve for connecting said air supply means to an upper portion of said hydraulic reservoir,clutch disengagement circuit means for connecting an electrical power source to said clutch solenoid valve to supply air pressure from said air supply means to said pneumatic actuator to disengage said clutch and at the same time to energize said solenoid valve means to permit the flow of hydraulic fluid from said hydraulic actuator to said reservoir to thereby substantially reduce engine operating speed upon clutch disengagement, andengine operating speed control circuit means for alternatively connecting an electrical power source to said solenoid valve means and to said throttle solenoid valve to pressurize said fluid reservoir means from said air supply means and cause flow of hydraulic fluid through said solenoid valve means to said hydraulic actuator to thereby increase the speed of said engine, or for connecting said electrical power source to said solenoid valve means without energizing said throttle solenoid valve to thereby release the hydraulic pressure in said hydraulic actuator and permit flow of hydraulic fluid from said actuator to said reservoir to thereby decrease the speed of said engine.

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