Auxiliary power unit for a hybrid electrical vehicle

• US 5,469,820 A
• Filed: 01/20/1995
• Issued: 11/28/1995
• Est. Priority Date: 07/15/1993
• Status: Expired due to Term

• Current Assignee: Cummins PowerGen IP, Inc. (Cummins Incorporated)
• Original Assignee: ONAN Corporation (Cummins Incorporated)
• Inventors: O'Gorman, Patrick A., Lent, Mark S., Norrick, Daniel A., Shanks, Eugene G., Data, Stanley E., Rose, Thomas K., Koziara, Robert P.
• Primary Examiner(s): Kamen, Noah P.
• Application Number:
  US08/376,043
• Time in Patent Office: 312 Days
• Field of Search: 123/192.2, 123/195 E, 123/149 R
• US Class Current: 123/192.2
• CPC Class Codes: B60K 2001/003 with means for cooling the electrical propulsion units
• CPC Class Codes: B60K 6/485 Motor-assist type
• CPC Class Codes: B60L 50/15 with additional electric power supply with capacitors charged by engine-driven generators B60L50/40; with batteries charged by engine-driven generators B60L50/61
• CPC Class Codes: F01P 2003/006 the liquid being oil
• CPC Class Codes: F01P 2003/008 the liquid being water and oil
• CPC Class Codes: F01P 2050/24 Hybrid vehicles
• CPC Class Codes: F01P 2060/00 Cooling circuits using auxiliaries
• CPC Class Codes: F01P 2060/08 Cabin heater
• CPC Class Codes: F01P 3/08 Cooling of piston exterior only, e.g. by jets
• CPC Class Codes: F01P 3/20 Cooling circuits not specific to a single part of engine or machine F01P3/22 takes precedence
• CPC Class Codes: F02B 2075/027 four
• CPC Class Codes: F02B 2075/1812 three
• CPC Class Codes: F02B 63/04 for electric generators
• CPC Class Codes: F02B 75/20 with cylinders all in one line
• CPC Class Codes: F02N 11/04 the motors being associated with current generators
• CPC Class Codes: F16F 15/264 Rotating balancer shafts F16F15/262 takes precedence
• CPC Class Codes: H02K 27/00 AC commutator motors or generators having mechanical commutator
• CPC Class Codes: H02K 5/20 with channels or ducts for flow of cooling medium
• CPC Class Codes: H02K 5/203 specially adapted for liquids, e.g. cooling jackets
• CPC Class Codes: H02K 7/14 Structural association with mechanical loads, e.g. with hand-held machine tools or fans with fan or impeller for cooling the machine H02K9/06
• CPC Class Codes: H02K 7/1815 : structurally associated with reciprocating piston engines general aspects of generating sets, e.g. housing, F02B63/04
• CPC Class Codes: Y02T 10/62 : Hybrid vehicles
• CPC Class Codes: Y02T 10/64 : Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/7072 : Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors

Abstract

An auxiliary power system includes an engine balance system, an integrated alternator/starter, a thermal management system, noise-vibration-harshness control system, an emissions/fuel economy system, an APU master control unit, and a vehicle control system.

Claims

1. An auxiliary power unit for a hybrid electric vehicle, comprising:

a combustion engine driving a crankshaft;

a balance shaft interconnected to the crankshaft by gear means for causing the balance shaft to rotate in a direction opposite to that of the crankshaft;

an alternator/starter mounted on an end of the balance shaft; and

wherein a net angular momentum of the auxiliary power unit is zero.

2. An auxiliary power unit in accordance with claim 1, wherein the alternator/starter is taper fit to the balance shaft.

3. An auxiliary power unit in accordance with claim 1, wherein the gear means includes a planetary gear assembly.