Patent ID: 8340884
Filing Date: 2012-12-25
Classification: B60W,F02D,Y02T

Abstract:
1. A system for controlling a vehicle having a combustible fuel powered engine, the system comprising: i. means for sensing a first parameter proportional to power and for sensing a second parameter proportional to fuel flow; ii. a controller for receiving the first and second parameters and dynamically determining a power to fuel ratio (P/F) by dividing the first parameter by the second parameter, and for comparing the P/F ratio to a previously determined P/F ratio; iii. means for selectively adjusting, by selecting one of maintaining, increasing and decreasing, throttle to maximize the P/F ratio at any given moment up to a predetermined speed, wherein the controller increases throttle in response to the P/F ratio being greater than the previously determined P/F ratio when the previous action was to increase throttle, wherein the controller increases throttle in response to the P/F ratio being less than the previously determined P/F ratio when the previous action was to decrease throttle, wherein the controller decreases throttle in response to the P/F ratio being greater than the previously determined P/F ratio when the previous action was to decrease throttle, and wherein the controller decreases throttle in response to the P/F ratio being less than the previously determined P/F ratio when the previous action was to increase throttle; and iv. means for allowing the vehicle to coast upon reaching the predetermined speed, and when vehicle speed has dropped a predetermined amount, enabling the means for selectively adjusting to increase vehicle speed again.