System and method for completing a neutral profile learning test

Patent metadata

Field	Value
Publication number	US-12097863-B2
Application number	US-202217655406-A
Country	US
Kind code	B2
Filing date	Mar 18, 2022
Priority date	Mar 18, 2022
Publication date	Sep 24, 2024
Grant date	Sep 24, 2024

Abstract

Systems and methods for operating a hybrid vehicle during an end of assembly line test are presented. In one example, torque of an integrated starter/generator (ISG) is adjusted so that the ISG may not affect engine data that is collected during end of assembly line engine testing. The collected engine data may be a basis for adapting engine operation.

First claim

The invention claimed is:

1. A method for operating a driveline, comprising:
adjusting a torque applied to the driveline via an electric machine in response a request for a neutral profile learning test request;
increasing a speed of an engine in response to the request for the neutral profile learning test request; and
deactivating engine fuel injectors in response to the request for the neutral profile learning test request.

2. The method of claim 1 , where adjusting the torque applied to the driveline includes commanding the electric machine to generate zero torque.

3. The method of claim 2 , further comprising collecting output from one or more engine sensors in response to the neutral profile learning test request.

4. The method of claim 3 , where the one or more engine sensors include an engine position sensor.

5. The method of claim 3 , where the one or more engine sensors include an intake manifold pressure sensor.

6. The method of claim 3 , where the one or more engine sensors include an air flow sensor.

7. The method of claim 1 , where the engine fuel injectors are deactivated after the engine reaches a threshold speed.

8. The method of claim 1 , further comprising reactivating the engine fuel injectors in response to an engine speed being less than or equal to a threshold speed.

9. A system, comprising:
an engine;
an integrated starter/generator (ISG);
a driveline disconnect clutch positioned in a driveline between the engine and the ISG; and
a controller including executable instructions stored in non-transitory memory that cause the controller to adjust torque output of the ISG in response to a request for neutral profile learning.

10. The system of claim 9 , where adjusting torque output of the ISG includes adjusting torque of the ISG to zero.

11. The system of claim 9 , further comprising additional instructions to increase a speed of the engine in response to the request for neutral profile learning.

12. The system of claim 9 , further comprising additional instructions to deactivate fuel injectors of the engine after increasing a speed of the engine.

13. The system of claim 9 , further comprising additional instructions to collect output of one or more engine sensors in response to the request for neutral profile learning.

14. The system of claim 13 , where the one or more engine sensors include an engine air flow sensor.

15. The system of claim 13 , where the one or more engine sensors include an engine position sensor.

16. A method for operating a driveline, comprising:
adjusting a torque applied to the driveline via an electric machine while a transmission is engaged in park or neutral in response a request for a neutral profile learning test request;
increasing a speed of an engine while the transmission is engaged in park or neutral in response to the request for the neutral profile learning test request; and
deactivating engine fuel injectors while the transmission is engaged in park or neutral in response to the request for the neutral profile learning test request.

17. The method of claim 16 , further comprising collecting output of one or more engine sensors via a controller after adjusting the torque applied to the driveline.

18. The method of claim 17 , further comprising adjusting the torque applied to the driveline according to a baseline torque calculation in response to withdrawing the neutral profile learning test request.

19. The method of claim 18 , further comprising adjusting a position of a throttle plate after increasing the speed of the engine while the transmission is engaged in park or neutral.

20. The method of claim 19 , where adjusting the torque applied to the driveline occurs while a driveline disconnect clutch of the driveline is closed.

Assignees

• Ford Global Tech Llc

Inventors

• Panhans Justin
• Syed Fazal Urrahman
• GADRE Ameya Vivek
• Sebastian Arun
• Connolly Francis Thomas
• Lee Minku

Classifications

• F02M39/005 Primary

  Arrangements of fuel feed-pumps with respect to fuel injection apparatus (F02M37/00 takes precedence) · CPC title

• B60W2510/083

  Torque · CPC title

• B60W50/085

  Changing the parameters of the control units, e.g. changing limit values, working points by control input · CPC title

• B60W2510/0275

  Clutch torque · CPC title

• B60W50/10

  Interpretation of driver requests or demands · CPC title