Patent ID: 6782868
Filing Date: 2004-08-31
Classification: F02D

Abstract:
An engine speed control method, comprising:(a) determining a range of allowable engine speeds, such range extending from a low limit, LOW_LIM=cnt_n_limâˆ’K1 to a high limit, LIM_HIGH=cnt_n_lim+K2, where K1 and K2 are predetermined constants, and cnt_n_lim is a function of operator input; (b) calculating an error, n_error, between measured engine speed and ctrl_n_lim; and (c) feeding the error to a feedback controller, such controller producing an engine brake torque, tqe_rpm, command for the engine, such controller disabling engine fuel injection when the measured engine speed is greater than LIM_HIGH and enabling fuel injection if the measured speed is within the range.