APPARATUS, SYSTEM AND METHOD FOR INCREASING BRAKING POWER

• US 20140214308A1
• Filed: 01/23/2014
• Published: 07/31/2014
• Est. Priority Date: 01/29/2013
• Status: Abandoned Application

• Current Assignee: Cummins Incorporated
• Original Assignee: Cummins Incorporated
• Inventors: Mulloy, John M., Dempsey, Daniel R., Oke, Ameya
• Application Number:
  US14/162,486
• Publication Number:
  US 20140214308A1
• Time in Patent Office: Days
• US Class Current: 701/110
• CPC Class Codes: F02B 37/22 by varying cross-section of exhaust passages or air passages , e.g. by throttling turbine inlets or outlets or by varying effective number of guide conduits F02B37/24 takes precedence
• CPC Class Codes: F02D 13/04 using engine as brake
• CPC Class Codes: F02D 9/06 Exhaust brakes
• CPC Class Codes: F02M 26/05 High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor

Abstract

Disclosed herein is an apparatus for increasing the braking power of a compression brake of an internal combustion engine having a variable geometry turbocharger. The apparatus includes an intake throttle module configured to close an air intake throttle in response to operation of the compression brake. Further, the apparatus includes a VGT module is configured to adjust a VGT component to decrease the swallowing capacity of the VGT in response to operation of the compression brake.

Claims

1. An engine system, comprising:

an internal combustion engine including a compression brake;

a controller configured to;

determine whether the compression brake is being operated;

determine whether one or more enablement conditions are met; and

if the compression brake is being operated and the one or more enablement conditions are being met, implement an increase in braking power of the compression brake.

2. The engine system of claim 1, wherein the controller is configured to implement the increase in braking power of the compression brake by partially closing an air intake throttle communicatively connected to the engine and reducing a swallowing capacity of a turbine communicatively connected to the engine.

3. The engine system of claim 2, wherein the swallowing capacity of the turbine is decreased by partially closing a component of a variable geometry turbocharger.

4. The engine system of claim 2, wherein the swallowing capacity of the turbine is decreased by closing a wastegate flow regulation device.

5. The engine system of claim 2, wherein the controller is further configured to implement the increase in braking power of the compression brake by opening an exhaust gas recirculation regulator device communicatively associated with the engine.

6. The engine system of claim 1, wherein the one or more enablement conditions includes a turbocharger speed being less than a maximum turbocharger speed.

7. The engine system of claim 1, wherein the one or more enablement conditions includes an exhaust manifold pressure being less than a maximum exhaust manifold pressure.

8. The engine system of claim 1, wherein the one or more enablement conditions includes a compressor outlet temperature being less than a maximum compressor outlet temperature.

9. An engine system, comprising:

an internal combustion engine including a compression brake;

an air intake throttle operatively and communicatively coupled to the engine, the air intake throttle configured to permit air to travel to the engine;

a turbine operatively and communicatively coupled to the engine; and

a controller configured to, in response to operation of the compression brake and in further response to one or more enablement conditions being met, implement an increase in braking power of the compression brake by partially closing the air intake throttle and reducing a swallowing capacity of the turbine.

10. The engine system of claim 9, further comprising a variable geometry turbine component associated with the turbine, and wherein the swallowing capacity of the turbine is decreased by adjusting the variable geometry turbine component.

11. The engine system of claim 10, wherein the variable geometry turbine component is part of a variable geometry turbocharger.

12. The engine system of claim 10, wherein the variable geometry turbine component comprises a wastegate flow regulation device.

13. The engine system of claim 10, wherein the variable geometry turbocharger component is adjusted to maintain a speed of a compressor and increase in an exhaust manifold pressure.

14. The engine system of claim 10, further comprising an exhaust gas recirculation line configured to enable the recirculation of exhaust gas to the engine, the exhaust gas recirculation line including an exhaust gas recirculation regulator device, and wherein the controller is further configured to, if the one or more enablement conditions are met and the compression brake is being operated, implement the increase in braking power of the compression brake by opening the exhaust gas recirculation regulator device.

15. The engine system of claim 9, wherein the one or more enablement conditions includes a turbocharger speed being less than a maximum turbocharger speed.

16. The engine system of claim 9, wherein the one or more enablement conditions includes an exhaust manifold pressure being less than a maximum exhaust manifold pressure.

17. The engine system of claim 9, wherein the one or more enablement conditions includes a compressor outlet temperature being less than a maximum compressor outlet temperature.

18. A method for increasing braking power of a compression brake of an internal combustion engine, comprising:

determining whether the compression brake is being operated;

determining whether one or more enablement conditions are met; and

if it is determined that the compression brake is being operated and the one or more enablement conditions are being met, implement an increase in braking power of the compression brake by partially closing an air intake throttle communicatively connected to the internal combustion engine and reducing a swallowing capacity of a turbine associated with an internal combustion engine.

19. The method of claim 18, wherein the swallowing capacity of the turbine is decreased by partially closing a component of a variable geometry turbocharger.

20. The method of claim 18, wherein the swallowing capacity of the turbine is decreased by closing a wastegate flow regulation device.

21. The method of claim 18, wherein the increase in braking power of the compression brake is further implemented by opening an exhaust gas recirculation regulator device communicatively associated with the engine.

22. The method of claim 18, wherein the one or more enablement conditions includes a turbocharger speed being less than a maximum turbocharger speed.

23. The method of claim 18, wherein the one or more enablement conditions includes an exhaust manifold pressure being less than a maximum exhaust manifold pressure.

24. The method of claim 18, wherein the one or more enablement conditions includes a compressor outlet temperature being less than a maximum compressor outlet temperature.