System for estimating a vehicle mass

• US 7,818,140 B2
• Filed: 01/29/2008
• Issued: 10/19/2010
• Est. Priority Date: 01/29/2008
• Status: Active Grant

• Current Assignee: ZF Friedrichshafen AG (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Original Assignee: ZF Friedrichshafen AG (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Inventors: Sauter, Ingo-Gerd, Dreier, Loren Christopher
• Primary Examiner(s): Cosimano; Edward R
• Assistant Examiner(s): Le; Toan M
• Application Number:
  US12/021,972
• Publication Number:
  US 20090192760A1
• Time in Patent Office: 994 Days
• Field of Search: 702/127, 702173-175, 702/33, 702/41, 702/44, 702/57, 702/60, 702/62, 702 64- 65, 702/81, 702/84, 702101-102, 702/105, 702/182, 702188-189, 738/65, 477/34, 477/900, 177/1, 177 3- 6, 177/26, 177/9, 177/13, 177 2511- 2513, 177/25.19, 177136-139, 177145-149, 177/153, 74/11, 746/40, 701/51, 701/124
• US Class Current: 702/173
• CPC Class Codes: F16H 59/52 dependent on the weight of the machine, e.g. change in weight resulting from passengers boarding a bus
• CPC Class Codes: F16H 61/0213 characterised by the method for generating shift signals

Abstract

A vehicle mass estimation system for use in a vehicle, such as a truck, including a transmission is provided. A processor may be operable to receive a signal relating to a mass of at least a portion of the vehicle. The processor may be further operable to estimate a vehicle mass based, at least in part, on the signal. The processor may be further operable to select a desired gear ratio for engagement in a transmission based, at least in part, on the estimated vehicle mass.

Claims

1. A vehicle mass estimation system for use in a vehicle including a tractor, a trailer, and a transmission, the system comprising:

a signal device operable to generate an indication signal;

a processor operable to communicate with the signal device and operable to receive the indication signal from the signal device;

wherein the processor is further operable to determine whether a vehicle trailer is connected to a vehicle tractor based on the indication signal;

wherein the processor is further operable to determine at least one of a type of vehicle trailer, a density of payload transported by the vehicle trailer, a volume of payload transported by the vehicle trailer, or a type of payload transported by the vehicle trailer based on the indication signal, if the vehicle trailer is connected to the vehicle tractor;

wherein the processor is further operable to estimate a vehicle mass based, at least in part, on the at least one of the type of vehicle trailer, the density of payload transported by the vehicle trailer, the volume of payload transported by the vehicle trailer, or the type of payload transported by the vehicle trailer, if the vehicle trailer is connected to the vehicle tractor; and

wherein the processor is further operable to select a desired gear ratio for engagement in a transmission based, at least in part, on the estimated vehicle mass.

2. The system of claim 1, wherein the signal device comprises a sensor operable to detect contact of the vehicle trailer with the vehicle tractor or an electronic component operable to monitor a power take-off component.

3. The system of claim 1, wherein the indication signal comprises an SAE J 1587 signal.

4. The system of claim 1, wherein determining the type of vehicle trailer comprises determining that a power take-off is operating.

5. The system of claim 4, wherein the processor is further operable to determine a power take-off operation time period based on the indication signal, and wherein the processor is further operable to determine a change in the vehicle mass based on the operation time period and a payload data corresponding to the power take-off operation.

6. The system of claim 1, further comprising:

a memory operable to store a predetermined value indicative of a vehicle trailer mass;

wherein the processor is further operable to estimate the vehicle mass based in part on the stored value when the indication signal indicates that the vehicle trailer is connected to the vehicle tractor.

7. The system of claim 1, further comprising:

a weighing device operable to communicate with the processor and operable to generate a mass signal indicative of a mass of at least a portion of the vehicle,

wherein the processor is further operable to estimate the vehicle mass based in part on the mass signal.

8. A method of estimating a vehicle mass comprising:

receiving an indication signal;

determining whether a vehicle trailer is connected to a vehicle tractor based on the indication signal;

determining at least one of a type of vehicle trailer, a density of payload transported by the vehicle trailer, a volume of payload transported by the vehicle trailer, or a type of payload transported by the vehicle trailer based on the indication signal, if the vehicle trailer is connected to the vehicle tractor; and

estimating a vehicle mass based, at least in part, on the at least one of the type of vehicle trailer, the density of payload transported by the vehicle trailer, the volume of payload transported by the vehicle trailer, or the type of payload transported by the vehicle trailer, if the vehicle trailer is connected to the vehicle tractor.

9. The method of claim 8, wherein determining the type of vehicle trailer comprises determining that a power take-off operation is occurring.

10. The method of claim 9, wherein estimating the vehicle mass comprises estimating a change in mass based on a time period of the power take-off operation and a payload.

11. The method of claim 8, wherein receiving the indication signal comprises receiving an SAE J 1587 signal.

12. The method of claim 8, wherein the vehicle mass is estimated based, at least in part, on a predetermined value indicative of a mass of the vehicle trailer.

13. The method of claim 8, further comprising:

receiving a mass signal from an onboard weighing device, wherein the mass signal is indicative of a mass of at least a portion of the vehicle; and

estimating the vehicle mass based in part on the mass signal.

14. A vehicle mass estimation system for use in a vehicle including a tractor, a trailer, and a transmission, the system comprising:

a signal device operable to generate an indication signal;

a processor operable to communicate with the signal device and operable to receive the indication signal from the signal device;

wherein the processor is further operable to determine a presence or absence of a vehicle trailer connected to a vehicle tractor based on the indication signal;

wherein the processor is further operable to estimate a vehicle mass based, at least in part, on the presence or absence of the trailer as indicated by the indication signal; and

wherein the processor is further operable to select a desired gear ratio for engagement in a transmission based, at least in part, on the estimated vehicle mass.

15. The system of claim 14, further comprising:

a memory operable to store a first predetermined value indicative of a vehicle tractor mass, and a second predetermined value indicative of a vehicle trailer mass;

wherein the processor is further operable to estimate the vehicle mass based in part on the first predetermined value and the second predetermined value when the indication signal indicates that the vehicle trailer is connected to the vehicle tractor; and

wherein the processor is further operable to estimate the vehicle mass based in part on the first predetermined value when the indication signal indicates that the vehicle trailer is not connected to the vehicle tractor.

16. The system of claim 14, wherein the signal device comprises a sensor operable to detect contact of the vehicle trailer with the vehicle tractor or an electronic component operable to monitor a power take-off component.

17. The system of claim 14, wherein the indication signal is indicative of a mass or a type of the vehicle trailer.

18. The system of claim 14, wherein the indication signal comprises an SAE J 1587 signal.

19. The system of claim 14, wherein the indication signal indicates that a power take-off is operating.

20. The system of claim 19, wherein the processor is further operable to determine a power take-off operation time period based on the indication signal, and wherein the processor is further operable to determine a change in the vehicle mass based on the operation time period and a payload data corresponding to the power take-off operation.