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1. KR1020210033526 - 건설 기계의 에어 필터 열화 판정 장치

Office
Republic of Korea
Application Number 1020217005528
Application Date 10.02.2020
Publication Number 1020210033526
Publication Date 26.03.2021
Publication Kind A
IPC
F02M 35/09
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
35Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
02Air cleaners
08with means for removing dust from cleaners; with means for indicating clogging; with by-pass means
09Clogging indicators
E02F 9/24
EFIXED CONSTRUCTIONS
02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL-SHIFTING
FDREDGING; SOIL-SHIFTING
9Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/-E02F7/160
24Safety devices
F02D 41/18
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
41Electrical control of supply of combustible mixture or its constituents
02Circuit arrangements for generating control signals
18by measuring intake air flow
F02D 41/22
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
41Electrical control of supply of combustible mixture or its constituents
22Safety or indicating devices for abnormal conditions
CPC
F02M 35/09
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
35Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
02Air cleaners
08with means for removing dust, ; particles or liquids; from cleaners; with means for indicating clogging; with by-pass means; ; Regeneration of cleaners
09Clogging indicators ; ; Diagnosis or testing of air cleaners
E02F 9/24
EFIXED CONSTRUCTIONS
02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
FDREDGING; SOIL-SHIFTING
9Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
24Safety devices ; , e.g. for preventing overload
F02D 41/18
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
41Electrical control of supply of combustible mixture or its constituents
02Circuit arrangements for generating control signals
18by measuring intake air flow
F02D 41/221
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
41Electrical control of supply of combustible mixture or its constituents
22Safety or indicating devices for abnormal conditions
221relating to the failure of actuators or electrically driven elements
Applicants 히다찌 겐끼 가부시키가이샤
Inventors 야마모토 준지
Agents 장수길
정석현
성재동
Priority Data 2019022972 12.02.2019 JP
Title
(KO) 건설 기계의 에어 필터 열화 판정 장치
Abstract
(KO) 엔진(2)의 흡기 부압에 기초하여 에어 클리너의 필터(5)의 눈막힘 판정이 내려져 에어 필터(5)가 청소될 때마다, 전회의 청소로부터 눈막힘 판정이 내려지기까지의 엔진(2)의 운전 시간의 누적값을 청소 간격(S)으로서 축차 계측한다. 미리 청소 간격(S)의 최소값으로부터 최대값까지를 구분하여 복수의 계급을 설정하고, 계측된 청소 간격(S)을, 각 계급 내의 속하는 계급에 더한다. 횡축을 계급으로 하고 종축을 청소 간격(S)의 빈도로 한 히스토그램을 작성하고, 파선으로 나타내는 히스토그램의 특성선(L1)을 직선에 근사시켜 실선으로 나타내는 근사 직선(L2)을 구한다. 에어 필터(5)의 열화 진행에 수반하여 히스토그램의 특성이 변화되어, 그에 기초하는 근사 직선(L2)의 기울기가 가는 선으로 나타내는 우상향으로부터 점차 감소하여, 수평에 상당하는 (ΔY/ΔX=0)을 초과한 시점에서 에어 필터 열화의 판정을 내린다.