Method and module for controlling a vehicle's speed based on rules and/or costs

US9511668B2 · kind B2 · utility

Assignee

• Scania CV AB · SE

Inventors

• Oskar Johansson · Stockholm, SE
• Maria Södergren · Stuvsta-Snättringe, SE
• Fredrik Roos · Stuvsta-Snättringe, SE

Key dates

• Filing date: Dec 22, 2011
• Grant date: Dec 6, 2016
• Expiry date: Dec 22, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/84
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A method for controlling a vehicle's speed, including: acquiring a set speed; determining, using using map and location data, a horizon made of route segments, each with a route characteristic; performing simulation cycles, each including: predicting the speed according to a conventional cruise control, which first prediction depends on the route characteristic; comparing the first predicted speed with lower and upper limit values, which define an engine torque for use in the next simulation cycle; making a second prediction of the speed when the engine torque depends on the comparison in the immediately preceding simulation cycle; comparing, as a second comparison, the second predicted speed with second lower and upper limit values, which delineate a speed range within which the speed is maintained; determining, based on the second comparison and/or the second predicted speed in this simulation cycle, a reference value for use by a vehicle control system.