# US 2009/0260903 A1 · Method of compensating for auxiliary loads of hybrid vehicle

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- Number: US 2009/0260903 A1
- Document ID: US20090260903A1
- Status: Published application
- Kind: A1
- Application number: 12/231,694
- Filed: 2008-09-05
- Published: 2009-10-22
- Earliest claimed: 2008-04-21
- Assignees: Hyundai Motor Company; Kia Motors Corporation
- Inventors: Joon Young Park
- Web page: https://patentgrep.com/patent/US20090260903A1

## CPC

- B60W 20/13: in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
- B60W 10/06: including control of combustion engines
- B60W 10/08: including control of electric propulsion units, e.g. motors or generators
- B60W 10/26: for electrical energy, e.g. batteries or capacitors
- B60W 30/1882: {characterised by the working point of the engine, e.g. by using engine output chart}
- B60W 30/1886: {Controlling power supply to auxiliary devices}
- B60K 6/20: the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60W 20/00: Control systems specially adapted for hybrid vehicles {(hybrid vehicle design, B60K6/00; electric vehicles B60L)}
- B60W 2510/244: Charge state
- B60W 2520/10: Longitudinal speed
- B60W 2540/10: Accelerator pedal position
- Y02T 10/40: Engine management systems
- Y02T 10/62: Hybrid vehicles
- Y02T 10/84: Data processing systems or methods, management, administration
- B60W: CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

The present invention provides a method of compensating for auxiliary loads of a hybrid vehicle, which divides the auxiliary loads into a mechanical auxiliary load and an electrical auxiliary load and performs an appropriate auxiliary load compensation according to the kind of auxiliary loads, thus improving system efficiency as well as power performance of the vehicle.

## Claims

### Claim 1

A method of compensating for auxiliary loads of a hybrid vehicle, the method characterized in that the auxiliary loads in the hybrid vehicle are divided into a mechanical auxiliary load and an electrical auxiliary load to perform an auxiliary load compensation, in which a control value for power control of an engine and a motor and a control value for charge/discharge control of a battery are compensated based on load amounts for the divided mechanical auxiliary load and electrical auxiliary load.

### Claim 2 (depends on 1)

The met hod of claim 1, wherein the mechanical auxiliary load is compensated by compensating a driver demand power based on the auxiliary load amount.

### Claim 3 (depends on 2)

The method of claim 2, wherein the driver demand power is increased based on the auxiliary load amount.

### Claim 4 (depends on 1)

The method of claim 1, wherein the electrical auxiliary load is compensated by compensating a battery charge/discharge limiting value based on the auxiliary load amount.

### Claim 5 (depends on 4)

The method of claim 4, wherein a battery charge limiting value is increased and a battery discharge limiting value is reduced based on the auxiliary load amount.

### Claim 6

A method of compensating for auxiliary loads of a hybrid vehicle, the method comprising a mechanical auxiliary load and an electrical auxiliary load to perform an auxiliary load compensation.

### Claim 7 (depends on 6)

The method of compensating for auxiliary loads of a hybrid vehicle of claim 6, further comprising a control value for power control of an engine and a motor and a control value for charge/discharge control of a battery.

### Claim 8 (depends on 7)

The method of claim 7, wherein the control value for power control of an engine and a motor and a control value for charge/discharge control of a battery are compensated based on load amounts for the divided mechanical auxiliary load and electrical auxiliary load.

### Claim 9 (depends on 6)

The met hod of claim 6, wherein the mechanical auxiliary load is compensated by compensating a driver demand power based on the auxiliary load amount.