Securing throttle area in a coordinated torque control system

Abstract

An engine system includes a throttle actuator module and a torque control module. The throttle actuator module controls a throttle actuator based on a desired throttle area. The torque control module determines an actuator torque. The torque control module determines a rate limited torque, a maximum torque, and a minimum torque based on the actuator torque and a predetermined rate of change. The torque control module determines the desired throttle area based on the actuator torque when the rate limited torque is greater than the maximum torque. The torque control module determines the desired throttle area based on the actuator torque when the rate limited torque is less than the minimum torque.

Description

[0001] This application claims the benefit of US Provisional Application No. 61 / 099,638, filed September 24, 2008. The content of the aforementioned application is incorporated herein by reference. technical field [0002] The present invention relates to control of vehicle actuators to achieve a desired engine torque, and more particularly to ensuring conversion of the desired engine torque to a desired throttle area. Background technique [0003] The background description provided herein is for the purpose of generally presenting the context of the disclosure. What the inventors have described in this background section, and aspects of which, at the time of writing, would not otherwise be considered prior art, are neither specifically nor implicitly considered to be a violation of the prior art of the present invention. technology. [0004] Internal combustion engines combust an air and fuel mixture within cylinders to drive pistons, which produce drive torque. Air flo...

AI Technical Summary

Problems solved by technology

However, conventional engine control systems do not control engine torque output as precisely as desired

In addition, conventional engine control systems do not provide quick response to control signals or coordinated engine torque control among the various devices that affect engine torque output

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