STRUCTURE FOR CONTROLLING HYDRAULIC PUMP FOR DRIVING ENGINE COOLING FAN OF HYBRID VEHICLE

• US 20140169991A1
• Filed: 06/07/2013
• Published: 06/19/2014
• Est. Priority Date: 12/18/2012
• Status: Abandoned Application

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: Byun, Hyung-Suk
• Application Number:
  US13/912,549
• Publication Number:
  US 20140169991A1
• Time in Patent Office: Days
• US Class Current: 417/201
• CPC Class Codes: F01P 2050/24 Hybrid vehicles
• CPC Class Codes: F01P 7/044 using hydraulic drives
• CPC Class Codes: F01P 7/048 using electrical drives
• CPC Class Codes: Y10S 903/93 Conjoint control of different elements

Abstract

A system for controlling a hydraulic pump for operating an engine cooling fan of a hybrid vehicle, which allows a hydraulic pump for driving an engine cooling fan of a hybrid vehicle to be driven by power provided from a transmission PTO of a hybrid vehicle while an engine is idling. Furthermore, the hydraulic pump to be driven may be driven by power supplied from an electric motor when the engine is stopped. As a result, an engine coolant temperature may be properly managed by operating the engine cooling fan of a hybrid vehicle even when the engine is stopped.

Claims

1. A system for controlling a hydraulic pump for operating an engine cooling fan of a hybrid vehicle, wherein the hydraulic pump is configured to be operated via power from a transmission PTO while an engine is idling, and configured to be operated via power from an electric motor when the engine is stopped.

2. The system of claim 1, further comprising:

an accumulator connected to the hydraulic pump to store hydraulic pressure generated by the hydraulic pump,

wherein the hydraulic pressure produced from the hydraulic pump is provided to and stored in the accumulator, and the hydraulic pressure stored in the accumulator is utilized to operate a fan driving motor for operating the cooling fan.

3. The system of claim 2, wherein the hydraulic pump is driven by brake force generated when a regenerative brake operation is performed, and hydraulic pressure produced by the hydraulic pump is stored in the accumulator.

4. The system of claim 2, wherein when an engine of a vehicle is stopped, the hydraulic pressure stored in the accumulator is supplied, and after the hydraulic pressure stored in the accumulator is consumed, the electric motor is operated to drive a hydraulic motor within the hydraulic pump.

5. The system of claim 1, wherein the hydraulic pump is connected to the transmission PTO and the electric motor by a gear assembly.

6. A system comprising:

a pump configured to operate an engine cooling fan of a hybrid vehicle,

a transmission power take off (PTO) operably connected to the pump; and

an electric motor operably connected to the pump,

wherein the pump is operated by the transmission PTO while an engine is idling, and the electric motor when the engine is stopped.

7. The system of claim 6, wherein the pump is a hydraulic pump.

8. The system of claim 7, further comprising:

an accumulator connected to the hydraulic pump to store hydraulic pressure generated by the hydraulic pump,

wherein the hydraulic pressure produced from the hydraulic pump is provided to and stored in the accumulator, and the hydraulic pressure stored in the accumulator is utilized to operate a fan driving motor for operating the cooling fan.

9. The system of claim 8, wherein the hydraulic pump is driven by a brake force generated when a regenerative brake operation is performed, and hydraulic pressure produced by the hydraulic pump is stored in the accumulator.

10. The system of claim 8, wherein when an engine of a vehicle is stopped, the hydraulic pressure stored in the accumulator is supplied, and after the hydraulic pressure stored in the accumulator is consumed, the electric motor is operated to drive a hydraulic motor within the hydraulic pump.

11. The structure of claim 7, wherein the hydraulic pump is connected to the transmission PTO and the electric motor by a gear assembly.