Engine stop/start inhibit during vehicle service

Patent metadata

Field	Value
Publication number	US-11111894-B2
Application number	US-201916374584-A
Country	US
Kind code	B2
Filing date	Apr 3, 2019
Priority date	Apr 3, 2019
Publication date	Sep 7, 2021
Grant date	Sep 7, 2021

Abstract

Systems and methods for operating an engine that may be automatically stopped and started without a human driver providing input to a device that has a sole function of stopping and starting the engine are presented. In one example, automatic engine starting is inhibited responsive to output of vehicle sensors that may be indicative of service being performed on a vehicle.

First claim

The invention claimed is:

1. An engine control method, comprising:
automatically stopping an engine responsive to vehicle operating conditions; and
inhibiting automatic starting of the engine via a controller in response to an indication that service is being performed on a vehicle as determined via the controller according to output of one or more sensors including vehicle suspension sensors, tire pressure sensors, a camera, fluid level sensors, or inertial sensors.

2. The method of claim 1 , further comprising monitoring vehicle suspension sensors for the indication that service is being performed on the vehicle.

3. The method of claim 1 , further comprising monitoring tire pressure sensors for the indication that service is being performed on the vehicle.

4. The method of claim 1 , further comprising monitoring a camera for the indication that service is being performed on the vehicle.

5. The method of claim 1 , further comprising monitoring fluid level sensors for the indication that service is being performed on the vehicle.

6. The method of claim 1 , further comprising monitoring pressure sensors for the indication that service is being performed on the vehicle.

7. The method of claim 1 , further comprising inertial sensors for the indication that service is being performed on the vehicle.

8. An engine control method, comprising:
automatically stopping an engine responsive to vehicle operating conditions;
inhibiting automatic starting of the engine via a controller in response to an indication that service is being performed on a vehicle while the vehicle's engine compartment hood is closed, where inhibiting automatic starting of the engine includes inhibiting automatic starting of the engine to a time when the inhibiting is overridden via a human, and where the indication is provided via one or more of a change in an engine oil level, a change in fuel pressure, a change in tire pressure, or a camera.

9. The method of claim 8 , where inhibiting automatic starting of the engine includes not supplying fuel to the engine.

10. The method of claim 9 , where inhibiting automatic starting of the engine includes not cranking the engine via a starter.

11. A vehicle system, comprising:
an engine coupled to a vehicle; and
a controller including executable instructions stored in non-transitory memory to automatically stop the engine responsive to vehicle operating conditions and inhibit automatically starting the engine responsive to an indication of service being performed on the vehicle provided via a vehicle suspension sensor.

12. The system of claim 11 , further comprising additional executable instructions stored in non-transitory memory to inhibit automatically starting the engine responsive to an indication of service being performed on the vehicle provided via a fuel rail pressure sensor.

13. The system of claim 11 , further comprising additional executable instructions stored in non-transitory memory to inhibit automatically starting the engine responsive to an indication of service being performed on the vehicle provided via an oil level sensor.

14. The system of claim 11 , further comprising additional executable instructions stored in non-transitory memory to inhibit automatically starting the engine responsive to an indication of service being performed on the vehicle provided via a camera.

15. The system of claim 11 , further comprising additional executable instructions stored in non-transitory memory to inhibit automatically starting the engine responsive to an indication of service being performed on the vehicle provided via inertial sensors.

16. The system of claim 11 , further comprising additional executable instructions stored in non-transitory memory to inhibit automatically starting the engine responsive to an indication of service being performed on the vehicle provided via a tire pressure sensor.

Assignees

• Ford Global Tech Llc

Inventors

• Dudar Aed
• Ghannam Mahmoud

Classifications

• F02N11/10

  Safety devices (F02N11/08 takes precedence) · CPC title

• B60W2710/06

  Combustion engines, Gas turbines · CPC title

• F02N11/0825

  related to prevention of engine restart failure, e.g. disabling automatic stop at low battery state · CPC title

• B60W10/06 Primary

  including control of combustion engines · CPC title

• Y02T10/40

  Engine management systems · CPC title