Electronic speed control system for vehicles, a method of determining the condition of a manual transmission clutch and of a park/neutral gear in an automatic transmission

摘要

A method to disengage an electronic speed control as a function of the condition of the park/neutral gear or manual clutch. If the automatic transmission lever is bumped from "drive" or the manual transmission clutch is depressed while the electronic speed control is operating, the method will sense this by detecting a difference in the ratio of engine speed to vehicle speed. If the ratio changes by .+-.25 percent, the electronic speed control is disengaged.