Method for obtaining a speed profile

• US 8,615,361 B2
• Filed: 09/28/2011
• Issued: 12/24/2013
• Est. Priority Date: 10/01/2010
• Status: Active Grant

• Current Assignee: Audi AG (Volkswagen AG)
• Original Assignee: Audi AG (Volkswagen AG)
• Inventors: Papajewski, Jens, Wilhelm, Christian, Toepler, Felix, Huang, Qi Hui
• Primary Examiner(s): CHEUNG, CALVIN K
• Application Number:
  US13/877,191
• Publication Number:
  US 20130261970A1
• Time in Patent Office: 818 Days
• Field of Search: 701/32.1, 701/119, 701/533, 701/540
• US Class Current: 701/533
• CPC Class Codes: G01C 21/3469 Fuel consumption; Energy use; Emission aspects
• CPC Class Codes: G01C 21/3492 employing speed data or traffic data, e.g. real-time or historical traffic control systems for road vehicles involving transmission of navigation instructions to the vehicle G08G1/0968

Abstract

Certain processes are defined in a data record and in each case a multiplicity of such processes are preferably defined for different driver types. Each process is distinguished by an entry speed and an exit speed. A preliminary speed profile can be divided into route sections, to each of which a process from the defined processes corresponds. The assigned speed profiles can be completely complex, in particular also comprise nonlinear sections between the entry speed and the exit speed, and in this way constant travel can be simulated, for example through an oscillatory change in the speed. It is also equally possible for stationary phases with a specific frequency and duration to be included in a process. The situational context which is formed by other processes is taken into account in the definition of the speed profile.

Claims

1. A method for acquiring a data record which represents a predicted speed of a vehicle, so as to produce a corrected speed profile, the corrected speed profile including speed information over a multiplicity of route points or a multiplicity of elapsed route-driving times, comprising:

making available a first data record by which route points are assigned to each of a multiplicity of routes;

making available a second data record by;

identifying a multiplicity of driving processes, each driving process having an entry speed and an exit speed;

acquiring measured values for speed during data acquisition trips, the measured values for speed being acquired at respective route points; and

using the measured values to assign driving behavior information to each driving process such that the second data record defines the multiplicity of driving processes for a driving style;

selecting a selected route on the basis of the first data record;

determining a preliminary speed profile for travel of the vehicle over the selected route;

using the preliminary speed profile to divide up the selected route into route sections, each section being assigned one of the driving processes; and

producing the corrected speed profile by assigning speed information to each driving process assigned to the selected route, the speed information being assigned using the second data record, wherein

for at least one driving process assigned to the selected route or group of driving processes assigned to the selected route, speed information is assigned by taking into account a preceding or succeeding driving process or group of driving processes.

2. The method according to claim 1, wherein in at least one of the driving processes, a speed profile, which has a nonlinear section, is defined between the entry speed and the exit speed.

3. The method according to claim 2, wherein in the nonlinear section an oscillatory change in speed is superimposed on a linear profile of the speed.

4. The method according to claim 1, wherein

for at least one of the driving processes, a speed profile is defined to have first and second sections, and

the first section has an interrupted linear profile

the second section interrupts the first section,

speed is spontaneously increased or decreased to a different speed during the second section, and

after the second section, the speed profile returns to the interrupted linear profile.

5. The method according to claim 1, wherein

there at least first and second data records defining driving processes respectively for first and second driving styles,

the first data record defines the driving style of a first driver using measured values acquired while the first driver travels along data acquisition trips,

the second data record defines a sporty, conservative or racing driver style,

the driving style is selected by an operator control input, and

the second date record for the driving style selected is taken into account when speed information is defined for each driving process assigned to the selected route.

6. The method according to claim 1, wherein

either

the driving style is selected by an operator control input, or

the driving style is assigned based a test run, and

the driving style selected or assigned is taken into account when speed information is defined for each driving process assigned to the selected route.

7. The method according to claim 6, wherein the driving style selected or assigned is also taken into account in determining the preliminary speed profile.

8. The method according to claim 1, wherein

the first data record also includes information about type of roads, and

the type of roads is taken into account when speed information is defined for each driving process assigned to the selected route.

9. The method according to claim 8, wherein taking into account the preceding or succeeding driving process or group of driving processes comprises taking into account a type of road travelled along during the preceding or succeeding driving process or group of driving processes.

10. The method according to claim 1, wherein

the first data record also includes information about an altitude of route points, and

the altitude of route points is taken into account when speed information is defined for each driving process assigned to the selected route.

11. The method according to claim 10, wherein taking into account the preceding or succeeding driving process or group of driving processes comprises taking into account an entry altitude or an exit altitude.

12. The method according to claim 1, wherein the speed profile is used to determine a power to be applied to wheels of the vehicle at times while travelling along the route or at the route points of the route.

13. The method according to claim 1, wherein

the first and the second data records are stored in a memory of the vehicle,

the selected route is selected based on an operator control device in the vehicle, and

a data processing device of the vehicle is used to determine the preliminary speed profile, to divide up the selected route into route sections and to assign speed information to each of the driving processes.

14. The method according to claim 1, wherein

a second data record is made available for each of a plurality of drivers,

each driver has an individual driving style, and

data acquisition trips are used by each driver to assign driving behavior information to each driving process.

15. The method according to claim 1, further comprising using the corrected speed profile to predict arrival time.

16. The method according to claim 1, further comprising using the corrected speed profile to predict fuel consumption.