Prime mover RPM limiting control

• US 9,758,040 B1
• Filed: 07/22/2016
• Issued: 09/12/2017
• Est. Priority Date: 07/22/2016
• Status: Active Grant

• Current Assignee: Textron Innovations Incorporated (Textron Inc)
• Original Assignee: Textron Inc
• Inventors: Reid, Shane Christopher, Stocks, John Lawrence, O'Donnell, Matthew Lawrence
• Primary Examiner(s): Walters, John
• Assistant Examiner(s): Triggs, James
• Application Number:
  US15/217,166
• Time in Patent Office: 417 Days
• CPC Class Codes: B60K 28/00 Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions for electrically-propelled vehicles B60L3/00; road vehicle drive control systems for purposes not related to the control of a particular sub-unit B60W30/00; drive control systems specially adapted for autonomous road vehicles B60W60/00
• CPC Class Codes: B60K 28/02 responsive to conditions relating to the driver
• CPC Class Codes: B60K 28/10 responsive to conditions relating to the vehicle
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 30/18 Propelling the vehicle
• CPC Class Codes: F02D 2200/60 said parameters being related to the driver demands or status
• CPC Class Codes: F02D 31/006 for maximum speed control
• CPC Class Codes: F02D 41/021 Introducing corrections for particular conditions exterior to the engine conjoint control of vehicle sub-units for propelling the vehicle B60W30/18
• CPC Class Codes: F02D 41/26 using computer, e.g. microprocessor

Abstract

A method for controlling the operation of a vehicle prime mover based on the engagement status of one or more safety restraints of the vehicle. In various implementations the method comprises monitoring, via a RPM controller of the vehicle, an operational status of vehicle, monitoring, via the RPM controller, the engagement status at least one passenger safety restraint of the vehicle, and limiting, via the RPM controller, a rotational speed, e.g., revolutions per minute (RPM) of one or more prime mover of the vehicle when the vehicle is in a On operational status and the at least one safety restraint is in a disengaged status.

Claims

1. A method for controlling the operation of a vehicle prime mover based on the engagement status of one or more safety restraints of the vehicle, said method comprising:

monitoring, via a RPM controller of the vehicle, an operational status of the vehicle;

monitoring, via the RPM controller, an engagement status of at least one passenger safety restraint of the vehicle; and

limiting, via the RPM controller, a rotational speed of one or more prime mover of the vehicle to a maximum threshold when the vehicle is in an On operational status and the at least one safety restraint is in a disengaged status,

wherein limiting the rotational speed of the one or more prime mover to the maximum threshold comprises controlling, via the RPM controller, operation of a throttle of at least one of the one or more prime mover, and wherein controlling the operation of the throttle of the at least one of the one or more prime mover, comprises overriding, via the RPM controller, a throttle command received from an accelerator pedal of the vehicle so that the rotational speed of the one or more prime mover does not exceed the maximum threshold regardless of the throttle command received from an accelerator pedal.

2. The method of claim 1 further comprising monitoring, via the RPM controller, the rotational speed of the one or more prime mover when the vehicle is in the On operational status.

3. The method of claim 2, wherein limiting the rotational speed of the one or more prime mover to a maximum threshold comprises controlling, via the RPM controller, an ignition timing of at least one of the one or more prime mover.

4. The method of claim 2, wherein limiting the rotational speed of the one or more prime mover to a maximum threshold comprises controlling, via the RPM controller, one or more of a voltage and a current supplied to at least one of the one or more prime mover.

5. The method of claim 4, wherein controlling the one or more of a voltage and a current supplied to at least one of the one or more prime mover, comprises overriding, via the RPM controller, a throttle command received from an accelerator pedal of the vehicle so that the rotational speed of the one or more prime mover does not exceed the maximum threshold regardless of the throttle command received from an accelerator pedal.

6. A method for controlling the operation of a vehicle prime mover based on the engagement status of one or more safety restraints of the vehicle, said method comprising:

monitoring, via a RPM controller of the vehicle, an operational status of the vehicle;

monitoring, via the RPM controller, an engagement status of at least one passenger safety restraint of the vehicle;

monitoring, via the RPM controller, a presence of a vehicle passenger in a seating structure of the vehicle, and

limiting, via the RPM controller, a rotational speed of one or more prime mover of the vehicle when the vehicle is in an On operational status, the at least one safety restraint is in a disengaged status, and at least one passenger is present in the seating structure.

7. An off-road utility vehicle, said vehicle comprising:

a pair of front wheels and a pair of rear wheels operationally connected to a chassis of the vehicle;

a passenger compartment supported by the chassis, the passenger compartment comprising;

a vehicle operational status switch structured and operable to control the operational status of the vehicle;

at least one seating structure structured and operable to support one or more vehicle passenger; and

at least one safety restraint device, each safety restraint device structured and operable to retain a respective vehicle passenger in a respective seating structure;

a drivetrain operationally connected to at least one of the wheels, the drivetrain comprising one or more prime mover structured and operable to generate torque deliverable to the at least one of the wheels; and

a prime mover RPM controller, the prime mover RPM controller structured and operable to;

receive input from the vehicle operational status switch of the vehicle to monitor an operational status of the vehicle;

receive input from at least one safety restraint sensor of the vehicle to monitor an engagement status of the at least one passenger safety restraint; and

output commands to one or more prime mover to limit a rotational speed of the one or more prime mover of the vehicle to a maximum threshold when the vehicle is in an On operational status and the at least one safety restraint is in a disengaged status.

8. The vehicle of claim 7, wherein the prime mover RPM controller is further structured and operable to output commands to a throttle of at least one of the one or more prime mover to limit the rotational speed of the respective prime mover to the maximum threshold.

9. The vehicle of claim 8, wherein the prime mover RPM controller is further structured and operable to override a throttle command received from an accelerator pedal of the vehicle so that the rotational speed of the one or more prime mover does not exceed the maximum threshold regardless of the throttle command received from an accelerator pedal.

10. The vehicle of claim 7, wherein the prime mover RPM controller is further structured and operable to output commands to a device structured and operable to control at least one of a current and a voltage supplied to at least one of the one or more prime mover to limit the rotational speed of the respective prime mover to the maximum threshold.

11. The vehicle of claim 10, wherein the prime mover RPM controller is further structured and operable to override a throttle command received from an accelerator pedal of the vehicle so that the rotational speed of the one or more prime mover does not exceed the maximum threshold regardless of the throttle command received from an accelerator pedal.

12. The vehicle of claim 7, wherein the prime mover RPM controller is further structured and operable to output commands to control an ignition timing of at least one of the one or more prime mover to limit the rotational speed of the respective prime mover to the maximum threshold.

13. The vehicle of claim 7, wherein the prime mover RPM controller is further structured and operable to monitor a presence of a vehicle passenger in a seating structure of the vehicle, and to limit the rotational speed of the one or more prime mover of the vehicle by limiting the rotational speed of the one or more prime mover of the vehicle when at least one passenger is present in the seating structure.