Supercharger-based twin charging system for an engine

Patent metadata

Field	Value
Publication number	US-9840972-B2
Application number	US-201213481473-A
Country	US
Kind code	B2
Filing date	May 25, 2012
Priority date	May 25, 2011
Publication date	Dec 12, 2017
Grant date	Dec 12, 2017

Abstract

The present disclosure relates to dual compression engine boosting systems utilizing both a turbocharger and a supercharger and control systems relating to relative activation and deactivation of the boosting devices. Various Exhaust Gas Recirculation (EGR) configurations are also disclosed for the dual compression engine boosting systems.

First claim

The invention claimed is:

1. An engine boosting system including a supercharger, the engine boosting system comprising:
a drive belt for operatively coupling the supercharger to a crankshaft of the engine for establishing a rotational relationship between at least one rotor of the supercharger and the crankshaft, wherein the drive belt is operably coupled to the at least one rotor of the supercharger via a supercharger clutch;
a bypass valve for selectively routing air around the supercharger with limited compression when the bypass valve is open; and
a control system configured to receive as a first input a rotational speed of the crankshaft and configured to receive as a second input a rotational speed of the supercharger clutch and further configured to perform a comparative analysis via a PID logic loop between the rotational speed of the crankshaft and the rotational speed of the supercharger clutch for sensing a relative reduction in rotational speed of the supercharger clutch by either a slippage of the drive belt or a slippage of the supercharger clutch and configured to at least partially open the bypass valve for routing air around the supercharger when the relative reduction in rotational speed of the supercharger clutch is sensed, wherein the control system is configured to receive the first input and the second input and perform a comparative analysis via the PID logic loop between the speed of the crankshaft and the speed of the supercharger clutch even when the supercharger clutch is fully engaged with and in a steady state of rotation with the crankshaft, spinning at the same rotational speed as the crankshaft.

2. An engine boosting system according to claim 1 , further comprising:
a transmission for the engine configured to selectively operably engage a driveshaft of a vehicle to the crankshaft of the engine;
wherein the control system is further configured to time engagement and disengagement of the supercharger with the crankshaft of the engine via the supercharger clutch during a transmission shift event, wherein the transmission shift event is defined by either a transmission master clutch shift event or a transmission gear shift event.

3. An engine boosting system according to claim 1 , wherein the control system is communicatively connected to an electronic control unit of a vehicle, the control system configured to execute program instructions which, when executed, cause the control system to:
receive a current gear in use by the vehicle;
determine a desired boost pressure of the supercharger, which is configured to provide boost for the engine of the vehicle; and
generate an actuation signal for the supercharger clutch based at least in part on the current gear of the vehicle and the desired boost pressure of the supercharger.

4. An engine boosting system according to claim 3 , wherein the control system is further configured to generate the actuation signal based upon a lookup in a supercharger clutch actuation table.

5. An engine boosting system according to claim 4 , wherein the supercharger clutch actuation table includes a plurality of yes/no entries, each entry associated with a current gear of the vehicle and a range of desired boost pressures.

6. A system according to claim 1 , wherein the engine boosting system is a dual compression engine boosting system that includes the supercharger and a turbocharger.

7. A system according to claim 6 , wherein the supercharger is located downstream of the turbocharger in providing the dual compression engine boosting system.

8. A system according to claim 6 , wherein the turbocharger is located downstream of the supercharger in providing the dual compression engine boosting system.

9. A system according to claim 6 , further comprising an exhaust gas recirculation loop for directing exhaust gases from the engine to a location between the turbocharger and the supercharger of the dual compression engine boosting system.

10. A system according to claim 9 , wherein the supercharger is located downstream of the turbocharger in providing the dual compression engine boosting system.

11. A system according to claim 9 , wherein the turbocharger is located downstream of the supercharger in providing the dual compression engine boosting system.

12. A system according to claim 6 , further comprising an exhaust gas recirculation loop for directing exhaust gases from the engine to an air intake location of either the turbocharger or the supercharger of the dual compression engine boosting system.

13. A system according to claim 12 , wherein the exhaust gas recirculation loop directs exhaust gases from the engine to the air intake location of the turbocharger, wherein the supercharger is located downstream of the turbocharger in providing the dual compression engine boosting system.

14. A system according to claim 12 , wherein the exhaust gas recirculation loop directs exhaust gases from the engine to the air intake location of the supercharger, wherein the turbocharger is located downstream of the supercharger in providing the dual compression engine boosting system.

15. A system according to claim 6 , further comprising an exhaust gas recirculation loop for directing exhaust gases from the engine to an air outlet location of either the turbocharger or the supercharger of the dual compression engine boosting system.

16. A system according to claim 15 , wherein the exhaust gas recirculation loop directs exhaust gases from the engine to the air outlet location of the turbocharger, wherein the turbocharger is located downstream of the supercharger in providing the dual compression engine boosting system.

17. A system according to claim 15 , wherein the exhaust gas recirculation loop directs exhaust gases from the engine to the air outlet location of the supercharger, wherein the supercharger is located downstream of the turbocharger in providing the dual compression engine boosting system.

18. A control system communicatively connected to an electronic control unit of a vehicle, the control system configured to execute program instructions which, when executed, cause the control system to:
receive as a first input a rotational speed of a crankshaft of an engine of the vehicle and configured to receive as a second input a rotational speed of a supercharger clutch and further configured to perform a comparative analysis via a PID logic loop between the rotational speed of the crankshaft of the engine of the vehicle and the rotational speed of the supercharger clutch for sensing a relative reduction in rotational speed of the supercharger clutch by either a slippage of a drive belt or a slippage of the supercharger clutch and configured to at least partially open a bypass valve for routing air around a supercharger of the vehicle when a relative reduction in rotational speed of the supercharger clutch is sensed, wherein the drive belt is configured to operatively couple the supercharger to the crankshaft of the engine for establishing a rotational relationship between the at least one rotor of the supercharger and the crankshaft, wherein the drive belt is operably coupled to the at least one rotor of the supercharger via the supercharger clutch, and wherein the bypass valve is configured to route air around the supercharger with limited compression when the bypass valve is in an open configuration, wherein the control system is configured to receive the first input and the second input and perform a comparative analysis via the PID logic loop between the speed of the crankshaft and the speed of the supercharger clut

Assignees

• Bevan Karen Evelyn
• Hughes Douglas Anthony
• Keidel Sean
• Morris Benjamin James
• Novak Jeremy
• Pryor Martin Dale
• Suhocki Christopher
• Wetzel Philip William
• Eaton Corp

Inventors

• Bevan Karen Evelyn
• Hughes Douglas Anthony
• Keidel Sean
• Morris Benjamin James
• Novak Jeremy
• Pryor Martin Dale
• Suhocki Christopher
• Wetzel Philip William

Classifications

• F02B33/34

  with rotary pumps (with cell-type pressure exchangers or the like F02B33/42) · CPC title

• F02D41/023

  in relation with the gear ratio shifting (conjoint control for improving gear change B60W30/19) · CPC title

• F02D41/0007

  for control of turbo-charged or super-charged engines (control of the pumps per se F02B37/12) · CPC title

• F02M26/08

  for engines having two or more intake charge compressors or exhaust gas turbines, e.g. a turbocharger combined with an additional compressor · CPC title

• F02B39/16

  Other safety measures for, or other control of, pumps · CPC title