Systems and methods for mitigating trailer instability due to pressure differentials

Patent metadata

Field	Value
Publication number	US-2020238976-A1
Application number	US-201916261841-A
Country	US
Kind code	A1
Filing date	Jan 30, 2019
Priority date	Jan 30, 2019
Publication date	Jul 30, 2020
Grant date	—

Abstract

System, methods, and other embodiments described herein relate to improving stability of a trailer being towed by a vehicle. In one embodiment, a method includes analyzing sensor data from a set of sensors associated with the vehicle to generate a pressure signature that characterizes lateral forces on the trailer resulting from a pressure differential between opposite sides of the trailer. The method includes, in response to determining the pressure signature satisfies criteria indicating an onset of instability in the trailer, generating a control signal based, at least in part, on the pressure signature that activates one or more vehicle systems to mitigate the instability in the trailer.

First claim

What is claimed is:

1 . A trailer stability system for improving stability of a trailer being towed by a vehicle, comprising:
one or more processors; a memory communicably coupled to the one or more processors and storing: a signature module including instructions that when executed by the one or more processors cause the one or more processors to analyze sensor data from a set of sensors associated with the vehicle to generate a pressure signature that characterizes lateral forces on the trailer resulting from a pressure differential between opposite sides of the trailer; and a stability module including instructions that when executed by the one or more processors cause the one or more processors to, in response to determining the pressure signature satisfies criteria indicating an onset of instability in the trailer, generate a control signal based, at least in part, on the pressure signature that activates one or more vehicle systems to mitigate the instability in the trailer.

2 . The trailer stability system of claim 1 , wherein the signature module includes instructions to acquire the sensor data from the set of sensors including at least two pressure sensors that are located on one or more of the opposite sides of the trailer and opposite sides of the vehicle,
wherein the signature module includes instructions to analyze the sensor data including instructions to compare pressure measurements from the at least two pressure sensors to quantify the pressure differential.

3 . The trailer stability system of claim 1 , wherein the stability module includes instructions to determine whether the pressure signature satisfies the criteria including instructions to:
compute the criteria as a function of at least a period and a magnitude of the pressure differential that are likely to induce the instability according to characteristics associated with the vehicle and the trailer, and compare attributes of the pressure differential identified in the pressure signature to the criteria to identify when the pressure signature is indicative of the onset of the instability in the trailer, and wherein the stability module includes instructions to generate the control signal including instructions to one or more of i) cause brakes within the trailer to intermittently activate, ii) cause the vehicle to accelerate, and iii) cause the vehicle to steer in a manner that counteracts the instability originating from the pressure differential.

4 . The trailer stability system of claim 3 , wherein the characteristics include at least a current speed, and a length of the trailer, and
wherein the stability module includes instructions to determine whether the pressure signature satisfies the criteria including instructions to correlate the pressure differential with environmental characteristics that cause the pressure differential by identifying a presence of the environmental characteristics from the sensor data including at least images of a surrounding environment.

5 . The trailer stability system of claim 1 , wherein the signature module includes instructions to analyze the sensor data including instructions to acquire at least a portion of the sensor data from one or more sensors in the set of sensors that are from the trailer.

6 . The trailer stability system of claim 1 , wherein the signature module includes instructions to analyze the sensor data to generate the pressure signature including instructions to determine i) a current pressure differential defining differences in pressure measurements currently occurring on the vehicle and the trailer, and ii) an oncoming differential defining predicted differences in the pressure measurements that are likely to occur at a subsequent time step,
wherein the signature module includes instructions to determine the oncoming differential including instructions to predict the pressure measurements according to environmental characteristics around the vehicle and the trailer embodied in the sensor data.

7 . The trailer stability system of claim 6 , wherein the signature module includes instructions to predict the pressure measurements including instructions to i) analyze images of a surrounding environment of the vehicle from the sensor data to identify an approaching vehicle, and ii) predict the oncoming differential according to at least attributes of the approaching vehicle including at least a magnitude of the oncoming differential.

8 . The trailer stability system of claim 6 , wherein the stability module includes instructions to:
determine whether the pressure signature satisfies the criteria including instructions to compare the predicted differences with the criteria, and, in response to the predicted differences satisfying the criteria, generate the control signal to pre-emptively adjust the one or more vehicle systems to mitigate the onset of the predicted differences.

9 . A non-transitory computer-readable medium for improving stability of a trailer being towed by a vehicle and including instructions that when executed by one or more processors cause the one or more processors to:
analyze sensor data from a set of sensors associated with the vehicle to generate a pressure signature that characterizes lateral forces on the trailer resulting from a pressure differential between opposite sides of the trailer; and in response to determining the pressure signature satisfies criteria indicating an onset of instability in the trailer, generate a control signal based, at least in part, on the pressure signature that activates one or more vehicle systems to mitigate the instability in the trailer.

10 . The non-transitory computer-readable medium of claim 9 , wherein the instructions to acquire the sensor data from the set of sensors include instructions to acquire the sensor data from at least two pressure sensors that are located on one or more of the opposite sides of the trailer and opposite sides of the vehicle,
wherein the instructions to analyze the sensor data include instructions to compare pressure measurements from the at least two pressure sensors to quantify the pressure differential.

11 . The non-transitory computer-readable medium of claim 9 , wherein the instructions to determine whether the pressure signature satisfies the criteria include instructions to:
compute the criteria as a function of at least a period and a magnitude of the pressure differential that are likely to induce the instability according to characteristics associated with the vehicle and the trailer, and compare attributes of the pressure differential identified in the pressure signature to the criteria to identify when the pressure signature is indicative of the onset of the instability in the trailer.

12 . The non-transitory computer-readable medium of claim 11 , wherein the instructions to generate the control signal include instructions to generate signals to cause one or more of i) activate brakes within the trailer to intermittently, ii) the vehicle to accelerate, and iii) the vehicle to steer in a manner that counteracts the instability originating from the pressure differential.

13 . The non-transitory computer-readable medium of claim 11 , wherein the characteristics include at least a current speed, and a length of the trailer, and
wherein the instructions to determine whether the pressure signature satisfies the criteria include instructions to correlate the pressure differential with environmental characteristics that cause the pressure differential by identifying a presence of the environmental characteristics from the sensor data including at least images of a surrounding environment.

Assignees

• Toyota Eng & Mfg North America

Inventors

• Crawford Robert J
• Williams Paxton S
• Sitarski Nicholas S

Classifications

• B60W2530/201

  Dimensions of vehicle · CPC title

• B60W2300/14

  Tractor-trailers, i.e. combinations of a towing vehicle and one or more towed vehicles, e.g. caravans; Road trains · CPC title

• B60W30/02 Primary

  Control of vehicle driving stability · CPC title

• B60W10/20

  including control of steering systems · CPC title

• B60W10/18

  including control of braking systems · CPC title