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公开(公告)号：US20190063363A1
公开(公告)日：2019-02-28
申请号：US16071944
申请日：2017-01-10
摘要： Provided is an engine control device capable of suppressing deterioration of combustion stability due to a change in engine temperature in an engine which performs lean combustion or EGR combustion. When lean combustion in which an air-fuel mixture leaner than a stoichiometric air-fuel ratio is burned or exhaust gas recirculation combustion in which a diluted air-fuel mixture is burned by re-suctioning exhaust gas discharged from the combustion chamber into the combustion chamber is performed, a ratio of a fuel injection amount during a compression stroke to a total fuel injection amount during one combustion cycle is increased as a temperature of an engine decreases.
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公开(公告)号：US20170074178A1
公开(公告)日：2017-03-16
申请号：US15125371
申请日：2015-01-07
CPC分类号： F02D37/02 , F01P3/20 , F01P5/10 , F02B31/06 , F02D13/0219 , F02D13/0261 , F02D21/08 , F02D41/0047 , F02D41/005 , F02D41/30 , F02D41/345 , F02D41/3836 , F02D41/401 , F02D41/402 , F02D2041/0015 , F02D2041/1472 , F02D2200/0602 , F02D2200/0606 , F02M26/15 , F02M26/28 , F02P5/145 , F02P5/1516 , F02P15/08 , Y02T10/146 , Y02T10/18 , Y02T10/44 , Y02T10/46 , Y02T10/47
摘要： The purpose of the present invention is to provide an engine control system that is capable of promoting mixing of fuel and air during exhaust gas recirculation, thereby suppressing combustion fluctuation of a gasoline engine, such that efficiency and exhaust gas purification can be simultaneously achieved. The engine control system controls an engine and is equipped with an injection device for injecting fuel directly into a cylinder and a recirculation device for recirculating exhaust gas to the intake side. When the temperature of the recirculating exhaust gas recirculated by the recirculation device is high as opposed to when the temperature is low, or when the amount of the recirculating exhaust gas recirculated by the recirculation device is large as opposed to when the amount is small, at least one of the following is executed: advancing of the fuel injection timing (IT_SP (n−2) of the injection device; increasing of the fuel pressure (FP) to be supplied to the injection device; reducing the frequency (n) of divided multi-stage injection to be performed by the injection device during the period between intake top dead center and compression top dead center; and reducing of the interval of divided multi-stage injection (IT_RE (n−2)).
摘要翻译： 本发明的目的是提供一种发动机控制系统，其能够促进废气再循环期间燃料和空气的混合，从而抑制汽油发动机的燃烧波动，从而可以同时实现效率和排气净化。 发动机控制系统控制发动机并配备有用于将燃料直接喷射到气缸中的注射装置和用于将排气再循环到进气侧的再循环装置。 当再循环装置再循环的再循环废气的温度高时，与温度低时相反，或当再循环装置再循环的再循环废气的量大时，与量少时相反，在 执行以下中的至少一个：推进喷射装置的燃料喷射正时（IT_SP（n-2））;增加要供给到喷射装置的燃料压力（FP）;降低分配的频率（n） 在进气上止点和压缩上止点之间的期间由喷射装置执行多级喷射;以及减少分段多级喷射的间隔（IT_RE（n-2））。
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公开(公告)号：US20210140388A1
公开(公告)日：2021-05-13
申请号：US16617375
申请日：2018-05-11
IPC分类号： F02D41/40
摘要： Combustion stability can be improved while HC and PN discharged from a combustion chamber are prevented. In an ECU that controls a fuel injection device installed in a combustion chamber of an internal-combustion engine so as to be able to inject fuel in a direction intersecting with a sliding direction of a piston, a pressure value of the fuel supplied to the fuel injection device is acquired, control is performed such that the fuel injection device injects the fuel at least twice in a compression stroke, and control is performed such that fuel injection timing of at least one time in the compression stroke is advanced earlier than fuel injection timing of a time corresponding to the high pressure value of the fuel when the acquired fuel pressure value is low.
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公开(公告)号：US20170009621A1
公开(公告)日：2017-01-12
申请号：US15113142
申请日：2015-01-07
CPC分类号： F01M5/005 , F01M5/001 , F02D35/026 , F02D41/0025 , F02D41/003 , F02D41/22 , F02D2041/224 , F02D2200/023 , F02D2200/0611 , F02D2250/08 , F02D2250/11 , H05B1/0236
摘要： An engine control device sets a target value for the engine oil temperature appropriately in an engine that uses gasoline as a fuel, even when the fuel does not have a single boiling point because the gasoline is a mixed composition, or when the fuel property changes (for example, when the vaporization property changes due to deterioration). In other words, the engine control device prevents excessive heating or insufficient heating by changing the oil temperature to the high side in a condition wherein the fuel being used does not easily vaporize, and changing the oil temperature to the low side in a condition wherein the fuel being used easily vaporizes. This engine control device includes an oil temperature controller that controls the temperature of oil lubricating the interior of the engine; a fuel supply device that supplies fuel to the engine; and a detector for detecting the property of the fuel. The temperature of the oil is controlled on the basis of a signal from the detector.
摘要翻译： 发动机控制装置在使用汽油作为燃料的发动机中适当地设定发动机油温的目标值，即使燃料由于汽油是混合组合物而不具有单一沸点，或者燃料特性变化时 例如，当气化性质因劣化而变化时）。 换句话说，发动机控制装置在所使用的燃料不容易汽化的状态下，通过将油温变更为高压来防止过度的加热或不充分的加热，并且在下述情况下将油温变更为低温 使用的燃料容易蒸发。 该发动机控制装置包括油温控制器，其控制润滑发动机内部的油的温度; 向发动机供给燃料的燃料供给装置; 以及用于检测燃料性质的检测器。 基于来自检测器的信号来控制油的温度。
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公开(公告)号：US20200032735A1
公开(公告)日：2020-01-30
申请号：US16337546
申请日：2017-09-13
IPC分类号： F02D41/30 , F02B17/00 , F02M61/14 , F02B75/04 , F02M35/10 , F02P5/04 , F02D37/02 , F02D41/34 , F02B31/06
摘要： In an internal combustion engine which performs a homogeneous lean combustion mode and a stratified lean combustion mode, there is provided a new internal combustion engine control device capable of obtaining a stable combustion state by decreasing influences of delay of an air flow and a degree of change of a transient state and smoothly performing switching between the homogeneous lean combustion mode and the stratified lean combustion mode. Accordingly, in the present invention, when switching between the stratified lean mode in which a compression stroke injection is performed by a direct injection injector 7 and the homogeneous lean combustion mode in which an intake stroke injection is performed by the direct injection injector 7 is performed, a predetermined delay time Δt is provided from at least a switching operation of a tumble control valve 6, a switching operation between the compression stroke injection and the intake stroke injection is performed, and the delay time Δt is set so as to correspond to a magnitude of the degree of change ΔL of the transient state. A switching timing between the compression stroke injection and the intake stroke injection is controlled according to the flow delay of an air control system such as the tumble control valve 6 and the degree of change ΔL of the transient state, and thus, it is possible to improve combustion stability in a combustion chamber.
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公开(公告)号：US20170314500A1
公开(公告)日：2017-11-02
申请号：US15520200
申请日：2015-09-16
发明人： Kenichiroh OGATA , Takashi OKAMOTO , Yoshinobu ARIHARA , Kazuhiro ORYOJI , Yoshihiro SUKEGAWA , Yuusuke KIHARA
CPC分类号： F02D41/402 , F02D13/0219 , F02D13/0261 , F02D35/021 , F02D35/023 , F02D35/027 , F02D41/005 , F02D41/006 , F02D41/0072 , F02D41/0077 , F02D41/009 , F02D41/0225 , F02D41/047 , F02D41/18 , F02D41/40 , F02D2041/001 , F02D2041/288 , F02D2200/021 , F02D2200/023 , F02D2200/0414 , F02D2200/101 , F02D2200/501 , F02D2200/602 , F02M26/00 , F02M26/14 , F02M26/46 , F02P5/1506 , F02P5/152 , Y02T10/18 , Y02T10/44 , Y02T10/47
摘要： The purpose of the present invention is to provide an engine control device with which it is possible to minimize decreases in combustion speed even when the EGR rate has been increased. The present invention is an engine control device for: controlling an engine provided with an injector for injecting fuel directly into a cylinder, an ignition device for igniting the injected fuel, and an EGR means capable of recycling combustion gas and varying the EGR rate of the recycling combustion gas; and commanding the injector to perform multiple injections during one cycle, wherein a command is given to perform a control for increasing the injection quantity per compression stroke relative to the total injection quantity in one cycle so that the injection quantity per compression stroke is greater when the EGR rate is high than when the EGR rate is low, and/or a control for increasing the number of injections per compression stroke relative to the total number of injections in one cycle so that the number of injections per compression stroke is greater when the EGR rate is high than when the EGR rate is low.
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