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An apparatus for controlling both pump displacement of a variable displacement hydraulic pump and the quantity of fuel delivered to an internal combustion engine for the purpose of delivering a requested hydraulic flow at a highly efficient operating point. The apparatus includes an underspeed contr

An apparatus for controlling both pump displacement of a variable displacement hydraulic pump and the quantity of fuel delivered to an internal combustion engine for the purpose of delivering a requested hydraulic flow at a highly efficient operating point. The apparatus includes an underspeed control means for reducing pump displacement in response to the operating speed of the engine lugging below a desired operating speed. Additionally, a fuel control means operates to reduce the quantity of fuel delivered to the engine in response to the operating speed of the engine rising above the desired operating speed.

대표청구항 ▼

An apparatus for controlling an internal combustion engine having a rack for controlling a fuel injection pump, and at least one variable displacement hydraulic pump, said pump having a load sensing means for detecting hydraulic load and adjusting inclination of a swash plate in response to hydrauli

An apparatus for controlling an internal combustion engine having a rack for controlling a fuel injection pump, and at least one variable displacement hydraulic pump, said pump having a load sensing means for detecting hydraulic load and adjusting inclination of a swash plate in response to hydraulic flow and load requirements, the apparatus comprising: first means for detecting the displacement of said hydraulic pump and delivering a first signal responsive to the displacement of said hydraulic pump; second means for detecting the rotational speed of said engine and delivering a second signal responsive to said rotational speed; control means for receiving said first signal and delivering a third signal responsive to the magnitude of said first signal; underspeed control means for receiving said second and third signals, comparing said second and third signals, and delivering a fourth signal in response to said third signal being greater than said second signal; swash plate actuator means for receiving said fourth signal and reducing the angle of inclination of said swash plate by an amount responsive to the magnitude of said fourth signal; fuel control means for receiving said second and third signals, comparing said second and third signals, and delivering a fifth signal in response to said third signal being less than said second signal; and, rack actuator means for receiving said fifth signal and controlling the supply of fuel to said engine responsive to the magnitude of said fifth signal.