BOOST SYSTEM INCLUDING TURBO AND HYBRID DRIVE SUPERCHARGER

• US 20160237880A1
• Filed: 04/28/2016
• Published: 08/18/2016
• Est. Priority Date: 10/28/2013
• Status: Active Grant

• Current Assignee: Eaton Intelligent Power Limited (Eaton Corporation PLC.)
• Original Assignee: Eaton Corp. (Wisconsin) (Eaton Corporation PLC.)
• Inventors: OUWENGA, Daniel R.
• Granted Patent: US 10,006,343 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F02B 33/34 with rotary pumps with cell-type pressure exchangers or the like F02B33/42
• CPC Class Codes: F02B 33/36 of positive-displacement type
• CPC Class Codes: F02B 33/38 of Roots type
• CPC Class Codes: F02B 37/013 with exhaust-driven pumps arranged in series
• CPC Class Codes: F02B 37/04 Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump
• CPC Class Codes: F02B 37/16 by bypassing charging air
• CPC Class Codes: F02B 39/04 Mechanical drives; Variable-gear-ratio drives non-mechanical pump drives having variable gear ratio F02B39/08
• CPC Class Codes: F02B 39/06 the engine torque being divided by a differential gear for driving a pump and the engine output shaft
• CPC Class Codes: F02B 39/10 electric
• CPC Class Codes: F02B 39/12 Drives characterised by use of couplings or clutches therein using fluid slip couplings for varying gear ratio F02B39/08
• CPC Class Codes: F02B 5/00 Engines characterised by positive ignition engines characterised by fuel-air mixture compression with positive ignition F02B1/02; engines characterised by air compression and subsequent fuel addition with positive ignition F02B3/02; with non-timed positive ignition F02B9/06; characterised by both fuel-air mixture compression and air compression, or characterised by both positive ignition and compression ignition F02B11/00
• CPC Class Codes: F02M 31/20 for cooling F02M31/005 takes precedence; use of cold F02M17/52; cooling of charging-air or of scavenging-air F02B29/04
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

The present disclosure relates to a boost system that provides boost pressure to an air intake manifold of an engine. The boost system includes a turbocharger and a supercharger that cooperate to provide the pressure boost to the air intake manifold. The boost system also includes a hybrid drive system for powering the supercharger.

Claims

1. A boost system for providing boost pressure to an air intake manifold of an engine, the boost system comprising:

a turbocharger and a supercharger that cooperate to provide the pressure boost to the air intake manifold; and

a hybrid drive system for powering the supercharger.

2. The boost system of claim 1, wherein the turbocharger is positioned upstream from the supercharger.

3. The boost system of claim 1, wherein the turbo charger is positioned downstream from the supercharger.

4. The boost system of claim 1, wherein the turbine is a single scroll turbine.

5. The boost system of claim 1, wherein the engine is a spark ignition gasoline engine.

6. The boost system of claim 4, wherein the engine has a size in the range of 1-4 liters.

7. The boost system of claim 4, wherein the engine has a size in the range of 1-3 liters.

8. The boost system of claim 1, further comprising a bypass line that bypasses the supercharger.

9. The boost system of claim 8, further comprising an intercooler positioned downstream from the supercharger for cooling the intake air, wherein the bypass line bypasses both the supercharger and the intercooler.

10. The boost system of claim 1, wherein the hybrid drive system includes an electric motor/generator coupled to a battery, and wherein the hybrid drive system also includes a planetary gear set that provides a torque transfer interface between the engine, the electric motor and the supercharger.

11. The boost system of claim 10, wherein a clutch is provided between the planetary gear set and the engine for selectively engaging and disengaging the planetary gear set from the engine.

12. The boost system of claim 11, wherein the electric motor/generator is used to reduce differential rotational speed within the clutch prior to engaging the clutch.

13. The boost system of claim 12, wherein the electric motor/generator is used to control the torque profile applied to the supercharger once the clutch is engaged.

14. The boost system of claim 12, wherein the planetary gear set includes a sun gear coupled to a rotor of the supercharger, a carrier coupled to one side of the clutch, a ring gear coupled to the electric motor/generator, planetary gears intermeshed between the sun gear and the ring gear, and a belt for transferring torque from the engine to a pulley, and wherein the clutch transfers toque between the pulley and the carrier when engaged and does not transfer torque between the pulley and the carrier when not engaged.

15. The boost system of claim 10, further comprising a control system that prevents the electric motor/generator from functioning as a motor if a charge level of the battery moves below a predetermined level.

16. The boost system of claim 14, wherein the boost system can be operated in an electric only mode by locking the carrier, disengaging the clutch and operating the motor/generator as a motor so as to apply torque to the ring gear.

17. The boost system of claim 14, wherein the boost system can be operated in a low battery mode in which the motor/generator is braked and the supercharger is driven only by the engine.

18. The boost system of claim 14, the boost system can be operated in a low battery mode in which the motor/generator is prevented from acting as a motor.

19. The boost system of claim 14, the boost system can be operated in a low battery mode in which the motor/generator is operated as a generator and the supercharger is driven only by the engine.