KR101724750B1 - Electric oil pump control method of hybrid vehicle - Google Patents

Electric oil pump control method of hybrid vehicle Download PDF

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Publication number
KR101724750B1
KR101724750B1 KR1020110131872A KR20110131872A KR101724750B1 KR 101724750 B1 KR101724750 B1 KR 101724750B1 KR 1020110131872 A KR1020110131872 A KR 1020110131872A KR 20110131872 A KR20110131872 A KR 20110131872A KR 101724750 B1 KR101724750 B1 KR 101724750B1
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South Korea
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oil pump
loop control
electric oil
open loop
temperature
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KR1020110131872A
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Korean (ko)
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KR20130065147A (en
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송상록
정상현
이학성
공승기
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현대자동차주식회사
기아자동차주식회사
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Priority to KR1020110131872A priority Critical patent/KR101724750B1/en
Priority to CN201210214673.8A priority patent/CN103161933B/en
Priority to JP2012145971A priority patent/JP2013122310A/en
Priority to US13/542,515 priority patent/US20130149170A1/en
Priority to DE102012106917A priority patent/DE102012106917A1/en
Publication of KR20130065147A publication Critical patent/KR20130065147A/en
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Publication of KR101724750B1 publication Critical patent/KR101724750B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • 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
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/30—Conjoint control of vehicle sub-units of different type or different function including control of auxiliary equipment, e.g. air-conditioning compressors or oil pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • 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
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • 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
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
    • B60W20/15—Control strategies specially adapted for achieving a particular effect
    • B60W20/17—Control strategies specially adapted for achieving a particular effect for noise reduction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • 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
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18—Propelling the vehicle
    • B60W30/192—Mitigating problems related to power-up or power-down of the driveline, e.g. start-up of a cold engine
    • B60W30/194—Mitigating problems related to power-up or power-down of the driveline, e.g. start-up of a cold engine related to low temperature conditions, e.g. high viscosity of hydraulic fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/0021—Generation or control of line pressure
    • F16H61/0025—Supply of control fluid; Pumps therefore
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • 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
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/10—Change speed gearings
    • B60W2510/107—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/90—Vehicles comprising electric prime movers
    • B60Y2200/92—Hybrid vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/68—Inputs being a function of gearing status
    • F16H59/72—Inputs being a function of gearing status dependent on oil characteristics, e.g. temperature, viscosity

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Automation & Control Theory (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Control Of Transmission Device (AREA)
  • Hybrid Electric Vehicles (AREA)

Abstract

본 발명은 하이브리드 차량에서, 극저온시에는 전동식오일펌프의 회전수가 불필요하게 높아지지 않도록 하여, 불필요한 배터리의 전력 소모를 방지하여 차량의 연비 향상에 기여하도록 하고, 불필요한 소음이 발생하지 않도록 하여 차량의 상품성을 향상시키며, 전동식오일펌프의 내구성도 향상시킬 수 있도록 한다.The present invention prevents the unnecessary increase in the number of revolutions of the electric oil pump at a very low temperature in a hybrid vehicle, thereby preventing unnecessary power consumption of the battery, contributing to improvement in fuel efficiency of the vehicle, And the durability of the electric oil pump can be improved.

Description

하이브리드 차량의 전동식오일펌프 제어방법{ELECTRIC OIL PUMP CONTROL METHOD OF HYBRID VEHICLE}TECHNICAL FIELD [0001] The present invention relates to an electric oil pump control method for a hybrid vehicle,

본 발명은 하이브리드 차량의 전동식오일펌프 제어방법에 관한 것으로서, 보다 상세하게는 극저온시에 전동식오일펌프를 제어하는 기술에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method of controlling an electric oil pump of a hybrid vehicle, and more particularly, to a technique of controlling an electric oil pump at a cryogenic temperature.

하이브리드 차량에는 변속기 내부에 구비된 기계식오일펌프 이외에 엔진의 구동 여부와 무관하게 구동될 수 있는 전동식오일펌프를 구비하여, 엔진이 작동하지 않은 조건 등의 상황에서도 변속기에 필요한 유압을 공급할 수 있도록 하는 것이 있다.
The hybrid vehicle is provided with a motor-driven oil pump that can be driven independently of whether the engine is driven, in addition to the mechanical oil pump provided inside the transmission, so that the hydraulic pressure required for the transmission can be supplied even under conditions in which the engine is not operated have.

종래 상기한 바와 같은 전동식오일펌프를 제어하는 방법은 주로 도 1에 도시된 바와 같이 이루어지는 바, TCU로부터 제공되는 목표회전수를 추종하여 제어를 하되, 전동식오일펌프의 초기 구동시에는 응답성 확보를 위해 소정의 기준회전수까지는, 오픈루프 제어를 수행하여 전동식오일펌프의 회전수를 신속히 상승시키고, 상기 기준회전수를 일단 넘어선 후에는 상기 TCU로부터의 목표회전수를 추종하여 폐루프제어를 수행하도록 한다.
Conventionally, a method of controlling the electric oil pump as described above is mainly performed as shown in FIG. 1, in which the target rotational speed provided from the TCU is followed and controlled. In the initial operation of the electric oil pump, Loop control is performed until the predetermined reference rotation speed is reached, and after the reference rotation speed is once exceeded, the target rotation speed from the TCU is followed to perform the closed-loop control do.

상기와 같은 제어에서 상기 기준회전수는 통상적인 상온 상태에서 변속기 오일의 점도를 고려하여 신속하게 원하는 유압을 형성할 수 있도록 설정된다.
In the above-described control, the reference rotation speed is set so that the desired oil pressure can be quickly formed in consideration of the viscosity of the transmission oil under normal room temperature conditions.

그런데, -10도 이하와 같은 극저온의 상태에서는, 상기 오일의 점도가 상온 상태에 비하여 상당히 커져서, 상기 전동식오일펌프가 비교적 낮은 회전수로 회전되는 경우에도 충분한 유압의 형성이 가능하다.
However, in the cryogenic state such as -10 degrees or less, the viscosity of the oil becomes considerably larger than that in the normal temperature state, so that sufficient hydraulic pressure can be formed even when the electric oil pump is rotated at a relatively low rotational speed.

따라서, 극저온의 상황에서 상기 전동식오일펌프를 상기 상온상태에서 설정되어 있는 기준회전수까지 오픈루프로 제어하는 부적절할 수 있다.
Therefore, it may be inadequate to control the electric oil pump in an open loop from the normal temperature state to the reference rotational speed set at a cryogenic temperature.

즉, 도 2에 도시된 바와 같이, 상온상태에 적합하게 설정되어 있는 상기 기준회전수가 500RPM 일 때, TCU에서 제공하는 목표회전수는 초기에도 300RPM에 불과한 상황에서도, 종래와 동일한 제어방법에 의해 전동식오일펌프의 회전수가 상기 기준회전수인 500RPM까지 오픈루프 제어된 후, 상기 기준회전수에 이르고 나서야 상기 목표회전수를 추종하는 폐루프 제어를 수행함에 따라 “A”로 표시된 부분과 같이 불필요하게 전동식오일펌프의 회전수가 높아지는 상황이 발생하게 되는 것이다.
That is, as shown in FIG. 2, even when the target rotation speed provided by the TCU is initially 300 RPM when the reference rotation number set for the normal temperature condition is 500 RPM, The number of rotations of the oil pump is controlled to the reference rotation speed of 500 RPM and then the closed loop control is performed until the reference rotation speed reaches the reference rotation speed, The number of revolutions of the oil pump is increased.

상기한 바와 같이 전동식오일펌프의 회전수가 불필요하게 높아지면, 불필요한 배터리의 전력 소모로 차량의 연비에 악영향을 주게 되고, 특히 불필요한 소음을 유발하여 차량의 상품성을 저하시키며, 전동식오일펌프의 내구성에도 바람직하지 못한 문제가 있다.
As described above, if the number of revolutions of the electric oil pump becomes unnecessarily high, power consumption of the unnecessary battery may adversely affect the fuel efficiency of the vehicle. In particular, unnecessary noise may be generated to lower the commerciality of the vehicle and to improve durability of the electric oil pump. There is a problem that can not be done.

상기의 발명의 배경이 되는 기술로서 설명된 사항들은 본 발명의 배경에 대한 이해 증진을 위한 것일 뿐, 이 기술분야에서 통상의 지식을 가진 자에게 이미 알려진 종래기술에 해당함을 인정하는 것으로 받아들여져서는 안 될 것이다.It will be appreciated that those skilled in the art will appreciate that the described embodiments are provided merely for the purpose of promoting an understanding of the background of the present invention, It will not.

KRKR 10-2009-004599010-2009-0045990 AA

본 발명은 상기한 바와 같은 문제점을 해결하기 위하여 안출된 것으로서, 극저온시에는 전동식오일펌프의 회전수가 불필요하게 높아지지 않도록 하여, 불필요한 배터리의 전력 소모를 방지하여 차량의 연비 향상에 기여하도록 하고, 불필요한 소음이 발생하지 않도록 하여 차량의 상품성을 향상시키며, 전동식오일펌프의 내구성도 향상시킬 수 있도록 한 하이브리드 차량의 전동식오일펌프 제어방법을 제공함에 그 목적이 있다.SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems as described above, and it is an object of the present invention to prevent unnecessary increase in the number of revolutions of the electric oil pump at a very low temperature to prevent power consumption of unnecessary batteries, And an object of the present invention is to provide an electric oil pump control method of a hybrid vehicle in which noise is not generated to improve the commerciality of a vehicle and to improve durability of an electric oil pump.

상기한 바와 같은 목적을 달성하기 위한 본 발명 하이브리드 차량의 전동식오일펌프 제어방법은According to an aspect of the present invention, there is provided an electric oil pump control method for a hybrid vehicle,

변속기의 유온을 측정하는 유온측정단계와;An oil temperature measuring step of measuring an oil temperature of the transmission;

상기 변속기의 유온이 소정의 기준온도 이하여서 극저온 상황인지를 판단하는 극저온판단단계와;A cryogenic temperature judging step of judging whether the oil temperature of the transmission is in a cryogenic condition because it is below a predetermined reference temperature;

상기 극저온판단단계 수행결과, 극저온 상황이면, 전동식오일펌프를 목표회전수까지 오픈루프 제어하는 제1오픈루프제어단계와;A first open loop control step of performing an open loop control of the electric oil pump to a target revolution number in the case of a cryogenic temperature as a result of the cryogenic temperature determination step;

상기 제1오픈루프제어단계가 끝나면, 상기 목표회전수를 추종하도록 상기 전동식오일펌프를 폐루프 제어하는 폐루프제어단계;A closed loop control step of performing closed loop control of the electric oil pump so as to follow the target rotational speed when the first open loop control step ends;

를 포함하여 구성된 것을 특징으로 한다.And a control unit.

본 발명은 하이브리드 차량에서 극저온시에는 전동식오일펌프의 회전수가 불필요하게 높아지지 않도록 하여, 불필요한 배터리의 전력 소모를 방지하여 차량의 연비 향상에 기여하도록 하고, 불필요한 소음이 발생하지 않도록 하여 차량의 상품성을 향상시키며, 전동식오일펌프의 내구성도 향상시킬 수 있도록 한다.The present invention prevents unnecessary increase in the number of revolutions of the electric oil pump at a cryogenic temperature in a hybrid vehicle, thereby preventing unnecessary power consumption of the battery, contributing to improvement in fuel efficiency of the vehicle, and preventing unnecessary noise, And the durability of the electric oil pump can be improved.

도 1은 종래 기술에 의한 상온 상태의 전동식오일펌프 제어를 설명한 그래프,
도 2는 종래 기술에 의한 극저온 상태의 전동식오일펌프 제어를 설명한 그래프,
도 3은 본 발명에 따른 하이브리드 차량의 전동식오일펌프 제어방법을 예시한 순서도,
도 4는 본 발명에 따른 극저온 상태의 전동식오일펌프 제어를 설명한 그래프이다.FIG. 1 is a graph illustrating an electric oil pump control at room temperature according to the prior art,
FIG. 2 is a graph illustrating the electric oil pump control at a cryogenic temperature state according to the prior art,
3 is a flowchart illustrating an electric oil pump control method of a hybrid vehicle according to the present invention,
4 is a graph illustrating control of the electric oil pump at a cryogenic temperature according to the present invention.

도 3을 참조하면, 본 발명 하이브리드 차량의 전동식오일펌프 제어방법의 실시예는변속기의 유온을 측정하는 유온측정단계(S10)와; 상기 변속기의 유온이 소정의 기준온도 이하여서 극저온 상황인지를 판단하는 극저온판단단계(S20)와; 상기 극저온판단단계(S20) 수행결과, 극저온 상황이면, 전동식오일펌프를 목표회전수까지 오픈루프 제어하는 제1오픈루프제어단계(S30)와; 상기 제1오픈루프제어단계(S30)가 끝나면, 상기 목표회전수를 추종하도록 상기 전동식오일펌프를 폐루프 제어하는 폐루프제어단계(S40)를 포함하여 구성된다.
Referring to FIG. 3, an embodiment of a method of controlling an electric oil pump of a hybrid vehicle according to the present invention includes an oil temperature measuring step (S10) for measuring an oil temperature of a transmission; A cryogenic temperature judgment step (S20) of judging whether the oil temperature of the transmission is in a cryogenic condition due to a temperature lower than a predetermined reference temperature; A first open loop control step (S30) of performing an open loop control of the electric oil pump to a target revolution number when the cryogenic temperature determination step (S20) is a cryogenic temperature condition; And a closed loop control step (S40) of performing closed loop control of the electric oil pump so as to follow the target rotational speed when the first open loop control step (S30) is completed.

즉, 극저온 상태에서 전동식오일펌프의 작동을 개시하는 경우에는 종래와 같이 무조건 소정의 기준회전수까지 오픈루프로 제어를 하지 않고, TCU에서 제공하는 목표회전수까지만 전동식오일펌프를 오픈루프로 제어를 하고 그 이후부터는 폐루프제어를 수행하도록 함으로써, 상기 목표회전수를 초과하는 과도한 전동식오일펌프의 초기 구동을 배제하여 불필요한 에너지 소모의 방지로 차량의 연비를 향상시키고, 소음을 저감시키며, 전동식오일펌프의 내구성 향상에 기여할 수 있도록 한 것이다.
That is, when the operation of the electric oil pump is started in the cryogenic temperature state, the electric oil pump is controlled to be open-loop only up to the target rotation speed provided by the TCU without unconditionally controlling the open loop to the predetermined reference rotation speed So that the initial driving of the electric oil pump exceeding the target rotation speed is prevented to prevent unnecessary energy consumption, thereby improving the fuel economy of the vehicle, reducing the noise, Thereby contributing to improvement in durability of the battery.

상기 극저온판단단계(S20)의 소정의 기준온도는 변속기의 오일 점도 변화가 전동식오일펌프의 구동에 따른 유압 형성에 미치는 영향을 고려하여 설정되는 것으로서, 적어도 -10℃ 이하의 범위로 설정되는 것이 바람직하다.
The predetermined reference temperature in the cryogenic temperature judgment step S20 is set in consideration of the influence of the oil viscosity change of the transmission on the formation of the hydraulic pressure in accordance with the drive of the electric oil pump and is preferably set to a range of at least -10 ° C Do.

상기 극저온판단단계(S20) 수행결과 극저온 상황이 아닌 경우에는, 상기 전동식오일펌프를 소정의 기준회전수까지 오픈루프 제어하는 제2오픈루프제어단계(S50)를 수행하고, 상기 제2오픈루프제어단계(S50) 이후에는 상기 폐루프제어단계(S40)를 수행하는 것이다.
If it is determined in step S20 that the cryogenic temperature is not a cryogenic condition, a second open loop control step (S50) of performing the open loop control of the electric oil pump to a predetermined reference rotation speed is performed, After step S50, the closed loop control step S40 is performed.

즉, 상기 제2오픈루프제어단계(S50)는 종래의 일반적인 상황에서의 제어방법과 동일하다.
That is, the second open loop control step S50 is the same as the control method in the conventional general situation.

따라서, 상기 제2오픈루프제어단계(S50)의 상기 기준회전수는 상온 상태를 기준으로 상기 전동식오일펌프의 응답성을 고려하여 설정되는 것으로서, 상기 제1오픈루프제어단계(S30)의 목표회전수보다 높은 회전수가 된다.
Therefore, the reference rotation speed of the second open loop control step (S50) is set in consideration of the responsiveness of the electric oil pump based on the room temperature condition. The target rotation speed of the first open loop control step (S30) The number of rotations is higher than the number of rotations.

즉, 예컨대 도 4에 도시된 바와 같이 변속기 오일의 상온시의 점도와 전동식오일펌프의 구동 개시에 따른 응답성을 고려하여 상기 기준회전수를 500RPM이라고 설정하였다면, 상기 제1오픈루프제어단계(S30)에서 TCU에 의해 계산되어 제시되는 목표회전수는 당연히 상기 기준회전수보다 낮은 회전수가 되며, 전동식오일펌프의 구동 초기의 비교적 높은 목표회전수도 예시한 바와 같이 300RPM으로서 상기 기준회전수 500RPM보다 작게 되는 것이고, 이는 역으로 상기 기준회전수는 상기 제1오픈루프제어단계(S30)의 목표회전수보다 높은 값으로 설정됨을 의미한다.
That is, if the reference rotation speed is set to 500 RPM in consideration of the viscosity of the transmission fluid at room temperature and the responsiveness of the electric oil pump when the transmission is started, as shown in FIG. 4, ), The target rotation speed calculated and presented by the TCU is naturally lower than the reference rotation speed, and the relatively high target rotation speed at the initial stage of driving the electric oil pump is 300 RPM as shown in the figure, which is smaller than the reference rotation speed 500RPM , Which means that the reference rotation speed is set to a value higher than the target rotation speed of the first open loop control step S30.

상기 오픈루프 제어는 상기 전동식오일펌프의 모터에 듀티값만을 제공하는 듀티제어로 수행할 수 있을 것이며, 상기 폐루프 제어는 상기 전동식오일펌프의 회전수를 피이드백 받아 상기 목표회전수에 추종시키는 PI제어(비례적분제어)로 수행할 수 있을 것이다. 물론, 상기 폐루프 제어의 구체적인 방법으로는 이외에도 PID제어 등이 사용되는 것도 가능할 것이다.
The open loop control may be performed by duty control that provides only a duty value to the motor of the electric oil pump, and the closed loop control may be performed by PI Control (proportional integral control). Of course, as a concrete method of the closed loop control, it is also possible to use a PID control or the like.

도 4를 참조하면, 도 2와 비교하여, 상기 전동식오일펌프의 작동 초기의 오버슈트 상황이 해소되어, 불필요한 전동식오일펌프의 회전수 상승이 발생하지 않게 됨을 알 수 있으며, 이로 인해, 차량의 연비 개선과 소음 저감 및 전동식오일펌프의 내구성 향상이 가능함은 물론이다.
Referring to FIG. 4, it can be seen that, as compared with FIG. 2, the overshoot condition at the initial stage of operation of the electric oil pump is eliminated, so that unnecessary increase in the number of revolutions of the electric oil pump does not occur. It is of course possible to improve the noise, reduce the noise and improve the durability of the electric oil pump.

본 발명은 특정한 실시예에 관련하여 도시하고 설명하였지만, 이하의 특허청구범위에 의해 제공되는 본 발명의 기술적 사상을 벗어나지 않는 한도 내에서, 본 발명이 다양하게 개량 및 변화될 수 있다는 것은 당업계에서 통상의 지식을 가진 자에게 있어서 자명할 것이다.While the present invention has been particularly shown and described with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the following claims It will be apparent to those of ordinary skill in the art.

S10; 유온측정단계
S20; 극저온판단단계
S30; 제1오픈루프제어단계
S40; 폐루프제어단계
S50; 제2오픈루프제어단계S10; Oil temperature measurement step
S20; Cryogenic temperature step
S30; The first open loop control step
S40; Closed loop control step
S50; The second open loop control step

Claims (5)

변속기의 유온을 측정하는 유온측정단계(S10)와;
상기 변속기의 유온이 소정의 기준온도 이하여서 극저온 상황인지를 판단하는 극저온판단단계(S20)와;
상기 극저온판단단계(S20) 수행결과, 극저온 상황이면, 전동식오일펌프를 목표회전수까지 오픈루프 제어하는 제1오픈루프제어단계(S30)와;
상기 제1오픈루프제어단계(S30)가 끝나면, 상기 목표회전수를 추종하도록 상기 전동식오일펌프를 폐루프 제어하는 폐루프제어단계(S40);를 포함하여 구성되되,
상기 극저온판단단계(S20) 수행결과 극저온 상황이 아닌 경우에는, 상기 전동식오일펌프를 소정의 기준회전수까지 오픈루프 제어하는 제2오픈루프제어단계(S50)를 수행하고;
상기 제2오픈루프제어단계(S50) 이후에는 상기 폐루프제어단계(S40)를 수행하며,
상기 제2오픈루프제어단계(S50)의 상기 기준회전수는 상온 상태를 기준으로 상기 전동식오일펌프의 응답성을 고려하여 설정된 것으로서, 상기 제1오픈루프제어단계(S30)의 목표회전수보다 높은 회전수인 것
을 특징으로 하는 하이브리드 차량의 전동식오일펌프 제어방법.Measuring an oil temperature of the transmission (S10);
A cryogenic temperature judgment step (S20) of judging whether the oil temperature of the transmission is in a cryogenic condition due to a temperature lower than a predetermined reference temperature;
A first open loop control step (S30) of performing an open loop control of the electric oil pump to a target revolution number when the cryogenic temperature determination step (S20) is a cryogenic temperature condition;
And a closed loop control step (S40) of performing closed loop control of the electric oil pump so as to follow the target rotational speed when the first open loop control step (S30) is completed,
Performing a second open loop control step (S50) of performing an open loop control of the electric oil pump to a predetermined reference number of revolutions when the cryogenic temperature judgment step (S20) is not a cryogenic condition;
After the second open loop control step (S50), the closed loop control step (S40) is performed,
The reference rotation speed of the second open loop control step (S50) is set in consideration of the responsiveness of the electric oil pump based on the normal temperature state, and is higher than the target rotation speed of the first open loop control step (S30) The number of revolutions
Wherein the electric oil pump is driven by the electric motor. 청구항 1에 있어서,
상기 극저온판단단계(S20)의 소정의 기준온도는 변속기의 오일 점도 변화가 전동식오일펌프의 구동에 따른 유압 형성에 미치는 영향을 고려하여 설정되는 것으로서, 적어도 -10℃ 이하의 범위로 설정되는 것
을 특징으로 하는 하이브리드 차량의 전동식오일펌프 제어방법.The method according to claim 1,
The predetermined reference temperature of the cryogenic temperature determination step S20 is set in consideration of the influence of a change in the oil viscosity of the transmission on the formation of hydraulic pressure in response to driving of the electric oil pump and is set to be at least -10 ° C
Wherein the electric oil pump is driven by the electric motor. 삭제delete 삭제delete 청구항 1 또는 2항에 있어서,
상기 오픈루프 제어는 상기 전동식오일펌프의 모터에 듀티값만을 제공하는 듀티제어로 수행하고;
상기 폐루프 제어는 상기 전동식오일펌프의 회전수를 피이드백 받아 상기 목표회전수에 추종시키는 PI제어(비례적분제어)로 수행하는 것
을 특징으로 하는 하이브리드 차량의 전동식오일펌프 제어방법.The method according to claim 1 or 2,
Wherein the open loop control is performed with duty control providing only a duty value to the motor of the electric oil pump;
The closed loop control is performed by PI control (proportional integral control) in which the rotational speed of the electric oil pump is fed back to follow the target rotational speed
Wherein the electric oil pump is driven by the electric motor.
KR1020110131872A 2011-12-09 2011-12-09 Electric oil pump control method of hybrid vehicle KR101724750B1 (en)

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