Electric power generation control method during idle charge in hybrid electric vehicle

• US 7,976,581 B2
• Filed: 11/15/2007
• Issued: 07/12/2011
• Est. Priority Date: 12/15/2006
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: Choi, Yong Kak
• Primary Examiner(s): Chen; Shelley
• Application Number:
  US11/940,730
• Publication Number:
  US 20080147259A1
• Time in Patent Office: 1,335 Days
• Field of Search: 903/907, 180/65.29
• US Class Current: 180/65.29
• 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: B60L 58/10 for monitoring or controlling batteries
• CPC Class Codes: B60W 10/24 including control of energy storage means
• CPC Class Codes: B60W 10/26 for electrical energy, e.g. batteries or capacitors
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 20/13 in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
• CPC Class Codes: B60W 2510/244 Charge state
• CPC Class Codes: B60W 2555/20 Ambient conditions, e.g. wind or rain
• CPC Class Codes: H02J 7/16 Regulation of the charging current or voltage by variation of field
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y10S 903/907 Electricity storage, e.g. battery, capacitor

Abstract

A method of controlling electric power generation during idle charge in a hybrid electric vehicle. The method includes determining whether an idle charge condition is satisfied; if the idle charge condition is satisfied, calculating a first charge power amount based on whether a load is applied, a gear shift position, and a state of charge of a battery; calculating a target charge speed based on the first charge power amount; calculating an altitude correction coefficient based on atmospheric pressure; calculating a second charge power amount based on the altitude correction coefficient and the first charge power amount; and controlling an amount of power generation and an amount of battery charge based on the second charge power amount.

Claims

1. A method of controlling electric power generation during idle charge in a hybrid electric vehicle, comprising:

determining whether an idle charge condition is satisfied;

if the idle charge condition is satisfied, calculating a first charge power amount based on whether a load is applied, a gear shift position, and a state of charge of a battery;

calculating a target charge speed based on the first charge power amount;

calculating an altitude correction coefficient based on atmospheric pressure;

calculating a second charge power amount based on the altitude correction coefficient and the first charge power amount; and

controlling an amount of power generation and an amount of battery charge based on the second charge power amount.

2. The method of claim 1, further comprising:

obtaining an actual charge speed; and

calculating a generation amount correction coefficient based on a difference between the target charge speed and the actual charge speed;

wherein calculating the second charge power amount is further based on the generation amount correction coefficient.

3. The method of claim 1, further comprising:

calculating a target charge torque value based on the second charge power amount and the target charge speed; and

controlling a generation load and an actual charge speed based on the target charge speed and the target charge torque value.