Processing

Please wait...

Settings

Settings

Goto Application

1. JP2020133398 - CONSTRUCTION MACHINE

Office
Japan
Application Number 2019022972
Application Date 12.02.2019
Publication Number 2020133398
Publication Date 31.08.2020
Grant Number 7021138
Grant Date 07.02.2022
Publication Kind B1
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
F02D 45/00
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
45Electrical control not provided for in groups F02D41/-F02D43/98
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
Y02T 10/40
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
10Road transport of goods or passengers
10Internal combustion engine [ICE] based vehicles
40Engine management systems
F02D 41/0002
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
0002Controlling intake air
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
F02D 2041/227
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
227Limping Home, i.e. taking specific engine control measures at abnormal conditions
F02D 2200/0406
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
2200Input parameters for engine control
02the parameters being related to the engine
04Engine intake system parameters
0406Intake manifold pressure
Applicants HITACHI CONSTR MACH CO LTD
日立建機株式会社
Inventors YAMAMOTO JUNJI
山本 純司
Agents 長門 侃二
Title
(EN) CONSTRUCTION MACHINE
(JA) 建設機械
Abstract
(EN)

PROBLEM TO BE SOLVED: To provide a construction machine capable of accurately deciding a deterioration degree of a filter.

SOLUTION: Each time a clogging decision of a filter 5 is made based on an intake negative pressure of an engine 2 and the filter 5 is cleaned, a cumulative value of an operation time of the engine 2 from the last cleaning to making the clogging decision is successively measured as a cleaning interval S. Multiple levels are set by dividing the cleaning intervals S from a minimum value to a maximum value beforehand, and the measured cleaning interval S is added to a level to which it belongs, among the levels. A histogram with a lateral axis defined as the level and a longitudinal axis defined as a frequency of the cleaning interval S is created, a characteristic line L1 of the histogram indicated as a broken line is approximated to a straight line, and an approximate straight line L2 indicated as a solid line is calculated. The characteristic of the histogram is changed with deterioration progress of the filter 5, an inclination of the approximate straight line L2 based thereon is decreased gradually from a shape upward to right indicated as a thin line, and a decision of filter deterioration is made at a point of time when the inclination exceeds ΔY/ΔX=0 corresponding to be horizontal.

SELECTED DRAWING: Figure 7

COPYRIGHT: (C)2020,JPO&INPIT


(JA)

【課題】フィルタの劣化度合いを正確に判定できる建設機械を提供する。
【解決手段】エンジン2の吸気負圧に基づきフィルタ5の目詰まり判定が下されてフィルタ5が清掃される度に、前回の清掃から目詰まり判定が下されるまでのエンジン2の運転時間の累積値を清掃間隔Sとして逐次計測する。予め清掃間隔Sの最小値から最大値までを区分して複数の階級を設定し、計測された清掃間隔Sを各階級の内の属する階級に加える。横軸を階級とし縦軸を清掃間隔Sの頻度としたヒストグラムを作成し、破線で示すヒストグラムの特性線L1を直線に近似させて実線で示す近似直線L2を求める。フィルタ5の劣化進行に伴ってヒストグラムの特性が変化し、それに基づく近似直線L2の傾きが細線で示す右上がりから次第に減少し、水平に相当するΔY/ΔX=0を超えた時点でフィルタ劣化の判定を下す。
【選択図】図7