System and methods for limiting standing start acceleration control using driver monitoring system (driver attention monitor)

• US 8,948,992 B2
• Filed: 06/12/2013
• Issued: 02/03/2015
• Est. Priority Date: 06/12/2013
• Status: Expired due to Fees

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Motor Engineering & Manufacturing North America Incorporated (Toyota Motor Corporation)
• Inventors: Ly, Tai J.
• Primary Examiner(s): Cheung, Mary
• Assistant Examiner(s): WONG, YUEN H
• Application Number:
  US13/915,717
• Publication Number:
  US 20140372003A1
• Time in Patent Office: 601 Days
• Field of Search: 701/70, 701/48
• US Class Current: 701/70
• CPC Class Codes: B60K 2031/0091 Speed limiters or speed cutters
• CPC Class Codes: B60K 28/06 responsive to incapacity of driver
• CPC Class Codes: B60W 2720/106 Longitudinal acceleration

Abstract

The present invention includes a system for limiting the acceleration of a vehicle. The system is operable to determine when the driver of the vehicle is not paying attention and upon making this determination, the system limits the available acceleration of the vehicle. The system includes a vehicle power source, a driver input such as an accelerator pedal, and a driver attention monitor, all three of which are in communication with an electronic control unit.

Claims

1. A system for limiting the acceleration of a vehicle comprising:

an electronic control unit;

a vehicle power source in communication with the electronic control unit;

a driver input in communication with the electronic control unit; and

a driver attention monitor in communication with the electronic control unit;

wherein the driver input sends a driver acceleration request signal to the electronic control unit, and the electronic control unit sends a vehicle acceleration request signal to the vehicle power source based on the driver acceleration request signal and information from the driver attention monitor,

wherein the electronic control unit alters the vehicle acceleration request signal to reduce acceleration of the vehicle below a predetermined vehicle acceleration threshold when a driver of the vehicle is not paying attention as determined by the driver attention monitor and when the driver acceleration request signal changes by a predetermined minimum threshold change amount within a predetermined minimum amount of time.

2. The system of claim 1, wherein the electronic control unit alters the vehicle acceleration signal when the driver acceleration request signal is above a predetermined driver acceleration request threshold.

3. The system of claim 1 further comprising:

a speed sensor in communication with the electronic control unit, wherein the electronic control unit alters the vehicle acceleration signal when the value of the speed sensor is below a predetermined speed sensor value threshold.

4. The system of claim 3 wherein, the speed sensor value threshold is less than or equal to five miles per hour.

5. The system of claim 1, wherein the predetermined vehicle acceleration threshold is greater than zero.

6. The system of claim 1, further comprising:

a driver alert mechanism, the driver alert mechanism is in communication with the electronic control unit, the electronic control unit activates the driver alert mechanism when the vehicle acceleration request signal is altered.

7. A method of limiting acceleration of a vehicle comprising:

providing a vehicle with a vehicle power source, an electronic control unit, a driver input and a driver attention monitor, the vehicle power source, the driver input, and the driver attention monitor are in communication with the electronic control unit;

generating a driver acceleration request signal with the driver input;

determining if a driver is paying attention with the driver attention monitor;

determining if the driver acceleration request signal is above a predetermined driver acceleration request threshold;

sending, by the electronic control unit, a vehicle acceleration request signal to the vehicle power source, the vehicle acceleration request signal being based on the driver acceleration request signal; and

altering, by the electronic control unit, the vehicle acceleration request signal to reduce vehicle acceleration when the driver is determined, by the driver attention monitor, not to be paying attention and when the driver acceleration request signal is determined to be above the predetermined driver acceleration request threshold.

8. The method of claim 7 further comprising:

providing a speed sensor in communication with the electronic control unit;

determining if the value of a speed sensor is less than a predetermined speed sensor threshold value; and

altering, by the electronic control unit, the vehicle acceleration request signal to reduce vehicle acceleration when the driver is determined, by the driver attention monitor, not to be paying attention, the driver acceleration request signal is determined to be above the predetermined driver acceleration request threshold, and the value of the speed sensor is less than a predetermined speed sensor threshold value.

9. The method of claim 8 further comprising:

providing a driver alert mechanism in communication with the electronic control unit; and

sending a signal to activate the driver alert mechanism when the vehicle acceleration request signal is altered.

10. A system for limiting the acceleration of a vehicle comprising:

an electronic control unit;

a vehicle power source in communication with the electronic control unit;

a driver input in communication with the electronic control unit;

a driver attention monitor in communication with the electronic control unit;

wherein the driver input sends a driver acceleration request signal to the electronic control unit, and the electronic control unit sends a vehicle acceleration request signal to the vehicle power source based on the driver acceleration request signal and information from the driver attention monitor;

wherein the electronic control unit alters the vehicle acceleration request signal to reduce acceleration when a driver of the vehicle is not paying attention as determined by the driver attention monitor and when the driver acceleration request signal is above a predetermined driver acceleration request threshold within a predetermined minimum amount of time.