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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：US10767588B2
公开(公告)日：2020-09-08
申请号：US16120688
申请日：2018-09-04
发明人： Ryosuke Itano , Toshiyuki Miyata , Hitoshi Toda
摘要： The control apparatus for an engine includes: a first controller that sets a valve-opening timing of an intake valve of the engine in response to an amount of intake air; and a second controller that sets an injection start time of a fuel injector of the engine in response to the amount of intake air. In a case where the amount of intake air is within a first range being equal to or more than a predetermined value, the first controller advances the valve-opening timing as compared with a case where the amount of intake air is equal to the predetermined value, and the second controller delays the injection start time as compared with a case where the amount of intake air is within a second range being less than the predetermined value.
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公开(公告)号：US10724881B2
公开(公告)日：2020-07-28
申请号：US15647354
申请日：2017-07-12
IPC分类号： G01F1/692 , F02D41/18 , G01F1/69 , F02D41/26 , F02D41/28 , G01F1/698 , G01F1/72 , G01F5/00 , F02D41/24 , F02M35/10 , G01F1/684
摘要： This signal processing unit includes: a comparison signal output unit which outputs a comparison signal on a negative side that corresponds to a negative side portion, of a second amplitude-increased signal, which is on the negative side with respect to the comparison threshold TH; an averaging processing unit which outputs an average signal obtained by averaging the comparison signal; a coefficient multiplication processing unit which outputs a coefficient-multiplied signal obtained by multiplying the average signal by an adjustment coefficient set in advance; and a signal correction processing unit which outputs, as a flow rate signal, a value obtained by correcting a first amplitude-increased signal so as to be decreased by use of the coefficient-multiplied signal, wherein the comparison threshold TH is set on the basis of an output characteristic of a sensor measured in advance with respect to at least a forward flow direction of an intake air.
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公开(公告)号：US10710575B2
公开(公告)日：2020-07-14
申请号：US15840298
申请日：2017-12-13
发明人： Aed M. Dudar
IPC分类号： B60W20/50 , F02M35/09 , F02D41/04 , F02D41/22 , F01N1/16 , B60W50/08 , F02B39/10 , F01N3/021 , F02D41/18 , G05D1/00
摘要： Methods and systems are provided for diagnostics of an exhaust tuning valve during vehicle-off conditions. In one example, the engine may be reverse rotated, unfueled while the position of the exhaust is varied and an intake air flow is estimated at each position of the exhaust tuning valve. The exhaust tuning valve may be diagnosed based on a change in air flow with the variation in the position of the exhaust tuning valve.
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公开(公告)号：US10704484B2
公开(公告)日：2020-07-07
申请号：US16145350
申请日：2018-09-28
发明人： Eiji Ikuta , Yuki Nose , Yoshiyuki Shogenji , Keiichi Myojo , Misako Ban
摘要： A controller for an internal combustion engine includes processing circuitry configured to execute: a dither control process of operating fuel injection valves to designate at least one of cylinders as a lean combustion cylinder, in which an air-fuel ratio is leaner than a stoichiometric air-fuel ratio, and to designate at least another one of the cylinders as a rich combustion cylinder, in which an air-fuel ratio is richer than the stoichiometric air-fuel ratio; and an idle-time limiting process of causing an absolute value of a difference between the air-fuel ratio in the lean combustion cylinder and the air-fuel ratio in the rich combustion cylinder to be smaller when the internal combustion engine is idling than when the internal combustion engine is not idling.
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36.发明授权公开(公告)号：US10697386B2
公开(公告)日：2020-06-30
申请号：US15780404
申请日：2016-11-18
发明人： Xavier Moine
摘要： A method for measuring the flow rate MAF of cool air entering an intake manifold of a two-stroke engine, the intake manifold being located between a throttle body and an intake system. The method uses a specific prediction model depending on whether the two-stroke engine is subject, on the one hand, to a light load and, on the other hand, to a medium or heavy load. The model suitable for the load is selected using a predetermined threshold and two absolute pressure measurements taken at the intake manifold at crankshaft angles of rotation around top dead center and bottom dead center. Next, a pressure quotient is formed for each model which will be used to deduce the flow rate of cool air entering the intake manifold.
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公开(公告)号：US10677183B2
公开(公告)日：2020-06-09
申请号：US16066807
申请日：2016-11-16
发明人： Yoshihiko Akagi , Seiji Asano , Kazuhiro Oryoji
IPC分类号： F02D41/18 , F02D41/00 , F02M26/48 , F02D37/02 , F02M35/10 , F02D41/14 , F02P5/152 , F02M26/46 , F02M26/47 , F02D41/38 , F02D41/04
摘要： Fuel injection control of an internal combustion engine requires an optimized fuel amount that can be burned completely with oxygen in intake air to be supplied, but the oxygen concentration in the atmospheric air is affected by humidity.By separately calculating a dry air flow rate that directly affects the oxygen amount and a humidity flow rate that is a change factor of the oxygen concentration in the intake air of the internal combustion engine, the fuel can be supplied to the cylinder of the internal combustion engine at an optimized air-fuel ratio. In addition, highly precise control involving EGR for flowback of a part of the exhaust gas flowing in the exhaust pipe to the intake pipe can also be achieved.
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公开(公告)号：US10604147B2
公开(公告)日：2020-03-31
申请号：US15804359
申请日：2017-11-06
发明人： Aed M. Dudar
IPC分类号： B60W20/50 , F02D41/18 , F02D41/22 , B60W40/08 , F02M35/10 , F02N11/00 , G01M15/10 , F02D41/04 , F02D41/00 , G01N33/00
摘要： Methods and systems are provided for pinpointing a source of degradation in a vehicle engine system. In one example, a method includes spinning an engine of a vehicle unfueled in a forward and a reverse direction, in no particular order, and recording a first intake air flow and a second intake air flow, respectively, in an intake of the engine, and where the source of degradation is indicated as a function of both the first air flow and the second air flow. In this way, the degradation of the vehicle engine system may be pinpointed as to being located in the intake manifold, the exhaust system, or the engine.
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公开(公告)号：US10570817B2
公开(公告)日：2020-02-25
申请号：US15766465
申请日：2016-10-05
发明人： Mats Hedman
IPC分类号： F02B75/04 , F02D15/04 , F02B19/06 , F01L13/00 , F02B3/12 , F02D13/02 , F01B31/14 , F02D41/18
摘要： Disclosed is a procedure to minimize NOx during varying engine loads in a 4-stroke diesel engine including at least one cylinder with a cylinder head, first piston on a connecting rod, one actuator mounted on the cylinder head and one of the actuator operated second piston lockable via a hydraulic circuit in various positions in a combustion chamber. The second piston, at the latest during the current compression stroke is actuated by the actuator and locked in the combustion chamber, where it by the first piston introduced air is compressed in a predetermined compression ratio to meet an existing engine load wherein the free operated inlet valve is brought to close the inlet stroke at a piston position where the volume of the combustion air as introduced at the end of the compression stroke gives the predetermined compression ratio and that the injector injects the stated amount of fuel.
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公开(公告)号：US10563549B2
公开(公告)日：2020-02-18
申请号：US15763348
申请日：2016-09-23
IPC分类号： F01L13/00 , F01L1/24 , F02D13/06 , F02D41/00 , F02D41/02 , F02D41/22 , F02D13/02 , F02D17/02 , F02D41/14 , F02D41/18 , F02M26/05
摘要： A friction loss management system for an engine, comprises a combustion engine comprising a crankshaft and a plurality of cylinders, a reciprocating piston assembly connected to the crankshaft, a fuel injector connected to an injection controller, an intake valve connected to an intake valve controller, and an exhaust valve connected to an exhaust valve controller. A control unit comprises at least one set of control algorithms configured to receive engine power demand data, and determine a number of cylinders of the plurality of cylinders for deactivation based on the received engine power demand data and further based on sensed or stored friction values for the plurality of cylinders. Determining the number of cylinders of for deactivation minimizes friction between the plurality of cylinders and their respective reciprocating piston assembly by selecting a cylinder combination of active cylinders and deactivated cylinders with the lowest total friction while meeting engine power demand.
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