System and method for limiting throttle opening area based on cam phaser position to minimize noise during acceleration

Patent metadata

Field	Value
Publication number	US-9366196-B2
Application number	US-201213469272-A
Country	US
Kind code	B2
Filing date	May 11, 2012
Priority date	Oct 31, 2011
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

A system according to the principles of the present disclosure includes a throttle limit determination module, a throttle area adjustment module, and a throttle control module. The throttle limit determination module determines a throttle limit based on an intake cam phaser position. The throttle area adjustment module adjusts a desired throttle area based on the throttle limit when the desired throttle area is greater than the throttle limit. The throttle control module controls a throttle opening area of a throttle valve based on the desired throttle area.

First claim

What is claimed is:

1. A system comprising:
a throttle limit determination module that determines a throttle limit based on a position of an intake cam phaser that regulates an opening timing of an intake valve;
a throttle area adjustment module that adjusts a desired throttle area based on the throttle limit when the desired throttle area is greater than the throttle limit; and
a throttle control module that controls a throttle opening area of a throttle valve based on the desired throttle area.

2. The system of claim 1 , further comprising a phaser control module that controls the intake cam phaser position to regulate intake valve timing.

3. The system of claim 1 , further comprising a throttle area determination module that determines the desired throttle area based on driver input.

4. The system of claim 1 , wherein the throttle limit determination module determines the throttle limit further based on a valve overlap period.

5. The system of claim 4 , further comprising a valve overlap determination module that determines the valve overlap period based on the intake cam phaser position and an exhaust cam phaser position.

6. The system of claim 1 , wherein the throttle limit determination module determines the throttle limit further based on engine speed.

7. The system of claim 1 , wherein the throttle limit determination module determines the throttle limit further based on a ratio of a manifold absolute pressure to ambient pressure.

8. The system of claim 7 , further comprising a pressure ratio determination module that determines the ratio of the manifold absolute pressure to the ambient pressure.

9. The system of claim 8 , wherein the pressure ratio determination module receives the ambient pressure from a pressure sensor disposed upstream from the throttle valve.

10. The system of claim 8 , wherein the pressure ratio determination module estimates the ambient pressure based on the manifold absolute pressure.

11. A method comprising:
determining a throttle limit based on a position of intake cam phaser that regulates an opening timing of an intake valve;
adjusting a desired throttle area based on the throttle limit when the desired throttle area is greater than the throttle limit; and
controlling a throttle opening area of a throttle valve based on the desired throttle area.

12. The method of claim 11 , further comprising controlling the intake cam phaser position to regulate intake valve timing.

13. The method of claim 11 , further comprising determining the desired throttle area based on driver input.

14. The method of claim 11 , further comprising determining the throttle limit further based on a valve overlap period.

15. The method of claim 14 , further comprising determining the valve overlap period based on the intake cam phaser position and an exhaust cam phaser position.

16. The method of claim 11 , further comprising determining the throttle limit further based on engine speed.

17. The method of claim 11 , further comprising determining the throttle limit further based on a ratio of a manifold absolute pressure to ambient pressure.

18. The method of claim 17 , further comprising determining the ratio of the manifold absolute pressure to the ambient pressure.

19. The method of claim 18 , further comprising receiving the ambient pressure from a pressure sensor disposed upstream from the throttle valve.

20. The method of claim 18 , further comprising estimating the ambient pressure based on the manifold absolute pressure.

Assignees

• Crombe Jonathan N
• Baur Andrew W
• Gm Global Tech Operations Inc

Inventors

• Crombe Jonathan N
• Baur Andrew W

Classifications

• F02D2009/0296

  Throttle control device with stops for limiting throttle opening or closing beyond a certain position during certain periods of operation · CPC title

• F02D11/105

  characterised by the function converting demand to actuation, e.g. a map indicating relations between an accelerator pedal position and throttle valve opening or target engine torque · CPC title

• F02D2200/703

  Atmospheric pressure · CPC title

• F02D2041/001

  for engines with variable valve actuation · CPC title

• Y02T10/18

  Cross-Sectional Technologies · mapped topic