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Engine control system for construction machine

  • US 5,878,721 A
  • Filed: 06/04/1998
  • Issued: 03/09/1999
  • Est. Priority Date: 06/10/1997
  • Status: Expired due to Term
First Claim
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1. An engine control system for a construction machine comprising a diesel engine, at least one variable displacement hydraulic pump rotatively driven by said engine for driving a plurality of actuators, flow rate instruction means for instructing a delivery rate of said hydraulic pump, and an electronic fuel injection device for controlling an injected fuel amount in said engine, said electronic fuel injection device including a fuel injection rate control actuator for controlling a fuel injection rate of said engine, wherein said engine control system comprises:

  • first detecting means for detecting a status variable of said hydraulic pump,load calculating means for calculating a load of said hydraulic pump based on a value detected by said first detecting means, andinjection rate calculation control means for operating said fuel injection rate control actuator so that the fuel injection rate depending on the load of said hydraulic pump is resulted.

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