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公开(公告)号：US10041427B2
公开(公告)日：2018-08-07
申请号：US14908297
申请日：2014-07-31
发明人： Satoshi Hanawa , Yoshiaki Ikai
摘要： A sensor output value estimation device that effectively estimates sensor output values reflecting a response delay of a temperature sensor. The device includes an estimated gas temperature calculation unit for calculating an estimated gas temperature of an engine on a basis of at least a running condition of the engine and a state quantity of the gas in the engine. The device also includes an estimated sensor output value calculation unit for calculating an estimated sensor output value reflecting the response delay of the temperature sensor on a basis of the calculated estimated gas temperature and a pre-stored first model formula specifying a relation among the temperature change time constant of the temperature sensor, the gas flow rate, and the gas temperature.
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公开(公告)号：US10677123B2
公开(公告)日：2020-06-09
申请号：US15552218
申请日：2016-02-17
申请人： ISUZU MOTORS LIMITED
发明人： Tadashi Uchiyama , Satoshi Hanawa
摘要： There is provided a first PM sensor provided upstream of a filter and including a first sensor filter having a plurality of first cells collecting PM in the exhaust gas to be introduced into the filter, and a first pair of electrodes arranged to face each other with the first cell interposed therebetween, a second PM sensor provided downstream of the filter and including a second sensor filter having a plurality of second cells collecting PM in the exhaust gas discharged from the filter, and a second pair of electrodes arranged to face each other with the second cell interposed therebetween, and a filter state determination unit for acquiring an efficiency of collecting the PM in the filter, based on a first electrostatic capacitance between the first pair of electrodes and a second electrostatic capacitance between the second pair of electrodes.
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公开(公告)号：US10072551B2
公开(公告)日：2018-09-11
申请号：US15026494
申请日：2014-10-08
申请人： ISUZU MOTORS LIMITED
CPC分类号： F01N9/002 , F01N3/0253 , F01N3/106 , F01N13/0093 , F01N13/0097 , F01N13/011 , F01N2560/12 , F01N2900/0601 , F01N2900/1602 , F01N2900/1606 , F02D41/029 , F02D41/1466 , F02D41/405 , F02D2200/0804 , F02D2200/0812 , Y02T10/47
摘要： An exhaust purification system includes: a diesel oxidation catalyst (DOC) provided on an exhaust path of an engine; an upstream diesel particulate filter (DPF) and a downstream DPF that are provided on the exhaust path at positions downstream of the DOC to collect particulate matter contained in exhaust gas; electrodes that detect a capacitance of the upstream DPF; a particulate matter accumulation estimating unit that estimates at least an amount of particulate matter accumulated in the downstream DPF on the basis of the capacitance received from the electrodes; and a forced regeneration control unit that injects fuels into the DOC and performs forced regeneration that burns and removes at least the particulate matter accumulated in the downstream DPF when the estimated amount of particulate matter from the particulate matter accumulation estimating unit surpasses a predetermined amount.
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公开(公告)号：US09885273B2
公开(公告)日：2018-02-06
申请号：US15022331
申请日：2014-09-18
申请人： ISUZU MOTORS LIMITED
CPC分类号： F01N11/00 , B01D53/9477 , B01D53/9495 , B01D2251/2062 , B01D2251/2067 , B01D2251/208 , B01D2257/404 , B01D2257/702 , F01N3/103 , F01N3/2066 , F01N13/009 , F01N2550/02 , F01N2590/08 , F01N2610/03 , F01N2900/1631 , Y02A50/2325 , Y02T10/47
摘要： A diagnostic device includes: a diesel oxidation catalyst (DOC) for oxidizing hydrocarbon (HC) and nitrogen monoxide in an exhaust gas; a selective catalytic reduction (SCR) catalyst for reducing and purifying NOx contained in the exhaust gas; a NOx purification rate calculation unit which calculates, based on NOx values at upstream and downstream sides of the SCR catalyst, a low temperature NOx purification rate and a high temperature NOx purification rate; a HC heat generation rate calculation unit which calculates an HC purification rate based on at least the difference between the exhaust gas heat quantities at upstream and downstream sides of the DOC; and a deterioration determination unit which determines the deterioration in the NO2 producing capability of the DOC based on the calculated low temperature NOx purification rate, the calculated high temperature NOx purification rate, and the calculated HC purification rate.
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公开(公告)号：US12092043B2
公开(公告)日：2024-09-17
申请号：US18275817
申请日：2022-02-04
申请人： Isuzu Motors Limited
发明人： Satoshi Hanawa
CPC分类号： F02D13/0234 , F02D41/009 , F02D41/182 , F02D2200/0411
摘要： Provided are a control device for an internal combustion engine, wherein the internal combustion engine is provided with a crank mechanism for converting a reciprocating motion of a piston into a rotating motion of a crankshaft, a cylinder accommodating the piston, and an intake valve capable of opening and closing an inlet for sucking gas into the cylinder, and the control device is provided with: a volumetric efficiency calculating unit for calculating a volumetric efficiency representing a suction efficiency when gas is sucked into the cylinder, on the basis of a cylinder capacity when the intake valve is closed; a gas suction amount calculating unit for calculating a gas suction amount sucked into the cylinder, by means of a predetermined formula, on the basis of the calculated volumetric efficiency; and a control unit for controlling the internal combustion engine on the basis of the calculated gas suction amount.
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公开(公告)号：US09695732B2
公开(公告)日：2017-07-04
申请号：US15025004
申请日：2014-10-02
申请人： ISUZU MOTORS LIMITED
CPC分类号： F01N11/002 , F01N3/0253 , F01N3/035 , F01N9/002 , F01N13/0097 , F01N2260/022 , F01N2550/02 , F01N2550/04 , F01N2560/06 , F01N2610/03 , F01N2900/0416 , F01N2900/0418 , F01N2900/0601 , F01N2900/1618 , F01N2900/1631 , Y02T10/47
摘要： A diagnostic device for an exhaust gas purification system that has a diesel oxidation catalyst (DOC), a diesel particulate filter, and an exhaust pipe injection device. The device includes a sensor for detecting a temperature of the DOC, a first calculation unit for converting an integration time of the detected temperature between regeneration intervals into a thermal history time with respect to a predetermined set temperature, and calculating a degree of degradation of the DOC based on this thermal history time, a second calculation unit for calculating a quantity of heat generated in the DOC based on the detected temperature during a forced regeneration execution period, and calculating another degree of degradation of the DOC based on the quantity of heat generated; and a diagnosis unit for diagnosing a degradation state of the DOC based on the degrees of degradation entered from the first and second calculation units.
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公开(公告)号：US09664085B2
公开(公告)日：2017-05-30
申请号：US15026387
申请日：2014-10-08
申请人： ISUZU MOTORS LIMITED
CPC分类号： F01N3/208 , B01D53/9431 , B01D53/9495 , B01D2251/2067 , F01N3/021 , F01N3/103 , F01N3/106 , F01N13/008 , F01N13/009 , F01N13/0093 , F01N13/0097 , F01N2560/021 , F01N2560/12 , F01N2610/02 , F01N2900/0601 , F01N2900/1602 , F01N2900/1622 , F02D9/02 , F02D41/0097 , F02D2009/0294 , Y02T10/24
摘要： An exhaust purification system includes a selective catalytic reduction (SCR) catalyst disposed at an exhaust system of an engine for using ammonia that is generated from urea water as a reducing agent to reduce NOx contained in exhaust gas, a device that injects urea water to the SCR catalyst, an inlet-side electrode that detects capacitance within the SCR catalyst at least from a vicinity of an inlet of the SCR catalyst to a vicinity of an intermediate section in an exhaust gas flowing direction, an outlet-side electrode that detects the capacitance within the SCR catalyst at least from the vicinity of the intermediate section to an outlet of the SCR catalyst in the exhaust gas flowing direction, and a calculation unit that calculates an ammonia adsorption amount within the SCR catalyst on a basis of the capacitances detected from the inlet-side and the outlet-side electrodes.
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公开(公告)号：US12071879B2
公开(公告)日：2024-08-27
申请号：US18453492
申请日：2023-08-22
申请人： ISUZU MOTORS LIMITED
发明人： Daiki Ishii , Takao Onodera , Yoshifumi Hanamura , Kazushige Yamaura , Satoshi Hanawa , Hotaka Saitou
IPC分类号： F01N11/00
CPC分类号： F01N11/007 , F01N2550/02
摘要： A NOx generation amount control device includes: a cumulative amount calculating part calculating a cumulative NOx amount obtained by adding together a plurality of NOx exhaust amounts calculated for each prescribed time interval; a specifying part specifying a target value of the cumulative NOx amount associated with a movement distance of a moving body or an output value of an engine; an estimating part estimating a predicted NOx amount indicating a predicted cumulative NOx amount based on a rotation speed of the engine and a fuel injection amount; a judging part judging whether the sum of the predicted NOx amount and the cumulative NOx amount exceeds the target value; and a determining part determining a scheduled NOx exhaust amount and determining at least one of an opening degree of the EGR valve and an opening degree of a turbocharger.
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公开(公告)号：US10774764B2
公开(公告)日：2020-09-15
申请号：US16466652
申请日：2017-12-04
发明人： Satoshi Hanawa , Hidekazu Fujie , Yoshiaki Ikai , Takuma Degawa
摘要： In order to adequately suppress both an increase in NOx emission amount and deterioration of fuel consumption rate, the present invention provides a fuel injection control information generation device equipped with: a test point information storage unit for holding test point information including a plurality of test points constituted by sets of engine speed, fuel injection amount, and oxygen concentration; and a control information generation unit for generating, for each test point included in the test point information, fuel injection control information in which the engine speed, fuel injection amount, and oxygen concentration of the test point are associated with an optimum fuel injection timing at which an index pertaining to the total of a fuel consumption rate and an NOx emission amount in the test point becomes the smallest.
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公开(公告)号：US10337434B2
公开(公告)日：2019-07-02
申请号：US15503351
申请日：2015-08-11
申请人： ISUZU MOTORS LIMITED
发明人： Tadashi Uchiyama , Naoto Murasawa , Satoshi Hanawa
摘要： The sensor includes a filter member including cells that trap PM in exhaust gas, electrode members arranged to face each other with the cell interposed and forming a capacitor, an electric heater that executes, when an amount of PM has accumulated in the cells, filter regeneration for combusting and removing the PM, a temperature sensor that acquires the temperature of the filter member, a storage unit that stores therein a reference temperature, which is the temperature of the filter member where the filter regeneration has been executed in a state in which PM is not flowing into the filter member, and estimation units that estimate a PM amount included in the exhaust gas based on (a) an electrostatic capacitance change amount between the electrode members during a regeneration interval and (b) a difference between the temperature acquired by the temperature sensor and the reference temperature during a filter regeneration interval.
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