Method and System for Providing a High-Efficiency Cruise Control for Motor Vehicles
Publication Date: 2016-Oct-28
The IP.com Prior Art Database
A method and system is disclosed for providing a high-efficiency cruise control for motor vehicles.
Page 01 of 3
Method and System for Providing a High -
-Efficiency Cruise Control for Motor Vehicles
Efficiency Cruise Control for Motor Vehicles
Primary ways in which motor vehicles consume energy include maintaining a given velocity against wind drag and/or other resistance, and accelerating to the given velocity against that resistance plus against the vehicle's momentum. Typical cruise control systems for motor vehicles rely on a proportional-integral-derivative controller, a type of feedback control system that allows for energy usage to vary for a single given velocity . With these systems, energy consumption increases or decreases to adjust for differences between the actual velocity and a target velocity while allowing for variable factors such as hills, rough pavement, or windy driving conditions. For that reason, a typical cruise control system is no more efficient than manually driving at a steady velocity. The cruise control system may miss efficiency opportunities in hilly terrain , because momentum that could have been gained on a downhill stretch is wasted in favor of maintaining a steady velocity. Recent innovations attempt to model terrain in an effort to improve cruise control efficiency. However, online maps can be problematic even when terrain is not a factor, and the weather modeling that has for many years attempted to predict wind or other weather conditions is notoriously error -prone. What is needed is an alternative to the prior art predictive modeling that is too error -prone to provide for optimal energy efficiency in the real world.
Disclosed is a method and system for providing a high-efficiency cruise control for motor vehicles. The method and system provide for computer -implemented cruise control with instant-to-instant velocity metering and energy consumption metering (e.g. instantaneous measurements of milliliters or fluid ounces per minute , for liquid fuel metering, or of watts or amps for electric energy metering). With the metering, the computer can collect one or more historical profiles of acceleration at different fuel consumption levels. These acceleration profiles are specific to the vehicle in which the device is installed and are filled in with information, and kept up to date, based on actual performance of the vehicle as it operates . From the acceleration profiles, one or more plans can be derived to represent best-historical-fit throttling to get from one velocity to another (e.g. 0 to 60 kmh or mph) or to maintain a steady-state velocity.
The device allows the operator to set a target efficiency / energy consumption rate and/or upper and lower boundaries of a cruise control velocity range, based on input from a plan. Or any or all of these values also can be set automatically , based on the plan. Like a traditional cruise control, when the speed is set at some value, the vehicle can go a little faster or slower without affecting the throttle -- and in the case where the device is used, this ma...