Control system of hybrid vehicle and method thereof

Patent metadata

Field	Value
Publication number	US-2016059841-A1
Application number	US-201414562732-A
Country	US
Kind code	A1
Filing date	Dec 7, 2014
Priority date	Sep 2, 2014
Publication date	Mar 3, 2016
Grant date	—

Abstract

A control system of a hybrid vehicle includes: an engine that generates power by burning fuel; a driving motor that assists the power from the engine by generating power using electricity supplied from a battery; an integrated starter-generator that starts the engine and charges the battery by operating selectively as a power generator; an atmospheric sensor that measures the atmospheric pressure; a temperature sensor that measures the temperature of intake air flowing into the engine; and a controller that calculates a control factor, using the atmospheric pressure measured by the atmospheric sensor and the temperature of intake air measured by the temperature sensor, and adjusts a State of Charge (SOC) charge band between an SOC where charging the battery is started and an SOC where a hybrid vehicle runs in a charge mode, in accordance with the magnitude of the control mode.

First claim

What is claimed is:

1 . A control system of a hybrid vehicle, comprising:
an engine that generates power by burning fuel; a driving motor that assists the power from the engine by generating power using electricity supplied from a battery; an integrated starter-generator that starts the engine and charges the battery by operating selectively as a power generator; an atmospheric sensor that measures atmospheric pressure; a temperature sensor that measures a temperature of intake air flowing into the engine; and a controller that calculates a control factor, using the atmospheric pressure measured by the atmospheric sensor and the temperature of intake air measured by the temperature sensor, and adjusts a State of Charge (SOC) charge band between an SOC where charging the battery is started and an SOC where a hybrid vehicle runs in a charge mode, in accordance with the magnitude of the control mode.

2 . The system of claim 1 , wherein the control factor is calculated by multiplying the atmospheric pressure by a pressure weight value and multiplying the temperature of intake air by a temperature weight value.

3 . The system of claim 2 , wherein the pressure weight value is larger than the temperature weight value.

4 . The system of claim 1 , wherein the smaller the control factor than a standard control factor, the more the controller increases the SOC charge band step by step.

5 . The system of claim 1 , wherein: the controller increases power for charging the battery by increasing an idle RPM of the engine, when the control factor is smaller than a standard control factor.

6 . The system of claim 1 , wherein when the control factor is smaller than a standard control factor, the controller decreases an EV line, and the EV line is output torque for operating the engine in an EV mode in accordance with torque requested by a driver.

7 . The system of claim 1 , further comprising:
a slope sensor measuring an inclination of a vehicle; and an air-conditioning system including a compressor that compresses a refrigerant and a compressor motor that operates the compressor, in order to control the internal temperature of a vehicle, wherein when it is determined that the control factor is smaller than a standard control factor and a vehicle is running on an upward slope for a predetermined time or more through the slope sensor, the controller controls an idle RPM of the engine by adjusting the time to ignite fuel flowing into a combustion chamber of the engine, when the control factor is smaller than the standard control factor.

8 . The system of claim 7 , wherein when it is determined that the control factor is smaller than the standard control factor and a vehicle is running on an upward slope for a predetermined time or more through the slope sensor, the controller limits power of the engine which is supplied to the compressor motor from the battery under a predetermined value.

9 . The system of claim 7 , wherein when it is determined that the control factor is smaller than the standard control factor and a vehicle is running on an upward slope for a predetermined time or more through the slope sensor, the controller shifts to a lower gear.

10 . A control method of a hybrid vehicle having an engine that generates power by burning fuel, a driving motor that assists the power from the engine by generating power using electricity supplied from a battery, and an integrated starter-generator, the method comprising the steps of:
measuring, by an atmospheric sensor, atmospheric pressure; measuring, by a temperature sensor, a temperature of intake air flowing into the engine; and utilizing a controller to calculate a control factor, based on the atmospheric pressure measured by the atmospheric sensor and the temperature of intake air measured by the temperature sensor, and adjusting a State of Charge (SOC) charge band between an SOC where charging the battery is started and an SOC where a hybrid vehicle runs in a charge mode, in accordance with the magnitude of the control mode.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Kwon Gi Young
• Lee Seunghan
• Park Seong Ik
• Oh Jongbum
• Choi Woo-Suk
• Park Il Kwon

Classifications

• Y10S903/93

  Conjoint control of different elements · CPC title

• B60K6/48

  Parallel type · CPC title

• B60W2710/244

  Charge state · CPC title

• B60W2050/0075

  Automatic parameter input, automatic initialising or calibrating means · CPC title

• B60W2710/083

  Torque · CPC title