CONTROLLER OF ENGINE AND VARIABLE CAPACITY PUMP

摘要

A controller of an engine which enables speedy work even under a heavy load and enables a strong work at the critical moment. The controller has a control means (30) which outputs commands to a fuel injection pump (2), relief control means (19, 21) and a variable capacity pump output control means (27, 29) so that when a signal for the on-operation of an active mode switch (7) is received, the product of the pump discharge pressure P by the pump discharge rate Q may be expressed by the P-Q constant horse-power curve Ha in an active mode in which the product of P and Q is higher than a predetermined value in the normal operation, and when a signal for the on-operation of a power mode switch (9) is received, the product of the pump discharge pressure P by the pump discharge rate in a mode higher than the active mode by one stage Q may be expressed by the P-Q constant horse-power curve Hap in a power active mode.