초록 ▼

An improved control method/system for controlling engine speed (ES) of an electronically controlled engine (12) communicating over an industry standard data link. If the difference between engine speed and target engine speed exceeds a reference value ((ES-ES.sub.TARGET)>REF?), then the engine is co

An improved control method/system for controlling engine speed (ES) of an electronically controlled engine (12) communicating over an industry standard data link. If the difference between engine speed and target engine speed exceeds a reference value ((ES-ES.sub.TARGET)>REF?), then the engine is commanded to operate in a torque control mode or a speed- and torque-limiting mode (64).

대표청구항 ▼

[ We claim:] [1.]1. A method for controlling engine speed in an automated transmission system including an electronically controlled engine having (i) a speed control mode of operation wherein the engine is fueled to cause engine speed to equal a desired engine speed value (ES.sub.TARGET) in a rampe

[ We claim:] [1.]1. A method for controlling engine speed in an automated transmission system including an electronically controlled engine having (i) a speed control mode of operation wherein the engine is fueled to cause engine speed to equal a desired engine speed value (ES.sub.TARGET) in a ramped manner and (ii) at least one of (a) a torque control mode of operation wherein the engine is fueled to cause engine torque to be a requested engine torque value and engine deceleration is not modulated, and (b) a speed- and torque-limiting mode wherein the engine is fueled to cause engine torque to be no greater than a requested engine torque value and engine deceleration is not modulated, said method characterized by the steps of:sensing current engine speed (ES);determining a desired engine speed (ES.sub.TARGET); andif the difference between current and desired engine speed exceeds a first reference value ((ES ES.sub.TARGET)>REF.sub.1), commanding operation in one of said torque control mode of operation to cause torque to equal a minimal engine torque value and said speed- and torque-limiting mode of operation to limit torque to a minimal engine torque value.