초록 ▼

Engine torque control as a function of a steady state and a transient torque control command to drive engine speed toward a target engine speed provides for a correction to the steady state torque control command to account for unmodelled effects of such slowly changing parameters as ambient tempera

Engine torque control as a function of a steady state and a transient torque control command to drive engine speed toward a target engine speed provides for a correction to the steady state torque control command to account for unmodelled effects of such slowly changing parameters as ambient temperature and pressure and engine coolant temperature, by determining a difference between an expected and an actual engine control parameter as function of the current engine operating level, translating such difference to an engine torque requirement deviation caused by unmodelled effects, and providing a torque correction therefor so that compensation may be provided in an appropriate manner for the unmodelled effects. The torque correction may further be stored as a function of the current value of the slowly changing parameters to develop a stored model which may be accessed, once developed, to provide the compensation with minimum on-line computation.

대표청구항 ▼

An engine speed control method for controlling engine output torque in accord with an engine torque requirement determined as the torque required to drive engine speed toward a target engine speed, comprising the steps of: storing a predetermined schedule of estimated steady state torque requirement

An engine speed control method for controlling engine output torque in accord with an engine torque requirement determined as the torque required to drive engine speed toward a target engine speed, comprising the steps of: storing a predetermined schedule of estimated steady state torque requirement values as a function of a predetermined engine operating condition; determining the current engine operating condition; referencing, from the stored schedule, a current estimated steady state torque requirement as a function of the current engine operating condition; estimating steady state torque requirement error; adjusting the current steady state torque requirement in direction to minimize the estimated steady state torque requirement error; and controlling engine output torque in accord with the adjusted current steady state torque requirement.