公开(公告)号：US09732667B2

公开(公告)日：2017-08-15

申请号：US14803514

申请日：2015-07-20

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Yasuhiro Kuze

IPC: F02M25/07 ,  F02B37/00 ,  F02B37/18 ,  F02M26/46 ,  F02M26/48 ,  F02D41/00 ,  F02M26/06 ,  F02M26/38 ,  F02B37/12 ,  F02M26/43 ,  F02D41/30 ,  F02M26/15

CPC classification number: F02B37/001 ,  F02B37/183 ,  F02B2037/122 ,  F02D41/005 ,  F02D41/0065 ,  F02D41/0082 ,  F02D41/3064 ,  F02M26/06 ,  F02M26/15 ,  F02M26/38 ,  F02M26/43 ,  F02M26/46 ,  F02M26/48 ,  Y02T10/144 ,  Y02T10/42 ,  Y02T10/47

Abstract: The invention has an object to control an EGR amount accurately in transient time. An ECU switches EGR control to the one-valve EGR control and the both-valve EGR control based on a request EGR amount. When the EGR control is switched to the one-valve EGR control from the both-valve EGR control, an EGR valve of one bank is closed first. Next, during a time period until an opening degree restriction time period elapses after the EGR valve is closed, an opening degree of an EGR valve of the other bank is restricted to be smaller than a one-valve target opening degree. Subsequently, when the opening degree restriction time period elapses, restriction of the opening degree of the EGR valve is cancelled, and the opening degree of the EGR valve is changes to the one-valve target opening degree.

公开(公告)号：US20160169168A1

公开(公告)日：2016-06-16

申请号：US14908291

申请日：2014-07-31

Applicant: ISUZU MOTORS LIMITED ,  TRANSTRON INC.

Inventor： Satoshi HANAWA ,  Yoshiaki IKAI

IPC: F02M26/47 ,  F02M26/46 ,  F02D21/08 ,  F02M26/33

CPC classification number: F02M26/47 ,  F02D21/08 ,  F02D41/144 ,  F02D41/1447 ,  F02D41/1456 ,  F02D2041/1433 ,  F02D2200/0618 ,  F02M26/33 ,  F02M26/46 ,  F02M26/49

Abstract: An exhaust system state detection device includes an intake air oxygen concentration sensor that detects an oxygen concentration of an intake air of an engine, an engine revolution sensor and an accelerator position sensor that in combination detect a running condition, an indicated thermal efficiency calculation unit that calculates an amount of change in the indicated thermal efficiency of the engine based on the intake air oxygen concentration, the fuel injection start timing, and a first model formula defining the relation among the intake air oxygen concentration, the injection start timing, and the amount of change in the indicated thermal efficiency, and an exhaust gas temperature calculating unit that calculates an exhaust gas temperature based on the amount of change in the indicated thermal efficiency and a second model formula defining the relation between the exhaust gas temperature and the amount of change in the indicated thermal efficiency.

Abstract translation: 排气系统状态检测装置包括检测发动机的进气的氧气浓度的进气氧浓度传感器，组合检测运行状态的发动机转速传感器和加速器位置传感器，指示的热效率计算单元， 基于进气空气氧浓度，燃料喷射开始正时以及限定进气空气氧浓度，喷射开始正时和数量之间的关系的第一模型公式来计算发动机的指示热效率的变化量 指示热效率的变化的排气温度计算单元，以及基于所指示的热效率的变化量和限定排气温度与变化量之间的关系的第二模型公式来计算排气温度的排气温度计算单元 在指示的热效率。

公开(公告)号：US6382199B2

公开(公告)日：2002-05-07

申请号：US75945801

申请日：2001-01-16

Applicant: BOSCH GMBH ROBERT

Inventor： NUSSER CLAUS-DIETER ,  STUBER AXEL ,  LANDES BERND ,  HAUSSMANN MARTIN ,  HENKELMANN PETER ,  KERNER JOERG ,  EHLERS GUIDO

IPC: F02D21/08 ,  F02D41/00 ,  F02D41/02 ,  F02D41/22 ,  F02D45/00 ,  F02M26/46 ,  F02M26/49 ,  F02M25/07

CPC classification number: F02D41/0055 ,  F02D21/08 ,  F02D41/1477 ,  F02D41/221 ,  F02M26/46 ,  F02M26/49 ,  Y02T10/47

Abstract: A method for diagnosing an exhaust-gas recirculation system of an internal combustion engine provides that the fuel quantity, which is needed for a desired mixture composition, is computed, at least approximately, in a control apparatus from at least stored data of the EGR system. The stored data can be in the form of a through-flow characteristic line. Thereafter, the fuel quantity is corrected by a control factor in dependence upon the mixture composition. The control factor is computed and stored when the EGR system is switched on and the control factor is computed and stored when the EGR system is switched off. The difference of these control factors is then formed and compared to pregiven values. A fault signal is outputted in the event of a deviation.

Abstract translation: 用于诊断内燃机的废气再循环系统的方法提供了至少在控制装置中从EGR系统的至少存储的数据计算所需混合物组合所需的燃料量 。 存储的数据可以是直流特性线的形式。 此后，根据混合物组成，通过控制因子校正燃料量。 当EGR系统接通时，控制因子被计算和存储，并且当EGR系统关闭时计算和存储控制因子。 然后形成这些控制因素的差异，并将其与预先设定的值进行比较。 在发生偏差的情况下输出故障信号。

公开(公告)号：US11359585B2

公开(公告)日：2022-06-14

申请号：US17101186

申请日：2020-11-23

Applicant: Hyundai Motor Company ,  Kia Corporation

Inventor： Dong Hee Han ,  Jong Il Park ,  Hyun Jun Lim ,  Seungwoo Hong ,  Joowon Lee ,  Kwanhee Choi ,  Heechang Oh ,  Yeongseop Park ,  Dong Ho Chu ,  Hyungbok Lee

IPC: F02M26/46 ,  F02M26/42 ,  F01N3/10 ,  F02M26/08 ,  F01N13/10 ,  F02B37/04 ,  F02M35/10 ,  F02M35/108 ,  F02M35/112

Abstract: An engine system may include: an engine including cylinders that generate a driving torque by combusting fuel; a first intake manifold connected to an intake line through which flows intake air into some of the plurality of cylinders; a second intake manifold supplying the intake air to the other cylinders of the plurality of cylinders through the first intake manifold; a first exhaust manifold connected to some cylinders that are connected to the first intake manifold; a second exhaust manifold connected to some other cylinders that are connected to the second intake manifold; a recirculation line branched from the second exhaust manifold to be coupled to the second intake manifold; a recirculation inlet valve disposed at a point at which the recirculation line and the second exhaust manifold are joined; and a manifold connection valve disposed on an intake line between the first intake manifold and the second intake manifold.

公开(公告)号：US10677183B2

公开(公告)日：2020-06-09

申请号：US16066807

申请日：2016-11-16

Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.

Inventor： Yoshihiko Akagi ,  Seiji Asano ,  Kazuhiro Oryoji

IPC: F02D41/18 ,  F02D41/00 ,  F02M26/48 ,  F02D37/02 ,  F02M35/10 ,  F02D41/14 ,  F02P5/152 ,  F02M26/46 ,  F02M26/47 ,  F02D41/38 ,  F02D41/04

Abstract: 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.

公开(公告)号：US10677182B2

公开(公告)日：2020-06-09

申请号：US16091463

申请日：2017-04-04

Applicant: Yanmar Co., Ltd.

Inventor： Atsuhito Iwase

IPC: F02D41/00 ,  F02D41/10 ,  F02D41/04 ,  F02D43/00 ,  F02D41/02 ,  F02D45/00 ,  F02D1/02 ,  F02D21/08 ,  F02D41/14 ,  F02M26/05 ,  F02M26/46 ,  F02M26/21 ,  F02M26/00

Abstract: In a method for controlling an engine, based on a control map of an engine speed N and a fuel injection amount Q of a common-rail fuel injection unit, a controller calculating the fuel injection amount Q depending on the engine speed N, calculating an injection amount deviation ΔQn as a fuel injection amount increase, and determining that an engine is in a transient state if the injection amount deviation ΔQn exceeds a reference transient injection amount deviation A2 or if a transient injection amount deviation count Xq is larger than or equal to a reference transient injection amount deviation count X2. If it is determined that the engine is in the transient state, the controller controls an EGR unit and a boost controller according to an excess air ratio λ that is an indicator indicating the state of the engine.

公开(公告)号：US20200149490A1

公开(公告)日：2020-05-14

申请号：US16184402

申请日：2018-11-08

Applicant: GM Global Technology Operations LLC

Inventor： Martino A. Casetti ,  Michael J. Lucido ,  Ping Ge ,  Jennifer C. Wheeler

IPC: F02D41/14 ,  F02M26/16 ,  F02M26/46 ,  F02D41/38 ,  F02M26/22 ,  F02B29/04 ,  F02M26/19 ,  F02M26/05

Abstract: A vehicle system includes an engine defining a plurality of cylinders and configured to combust a fuel. A method of increasing efficiency of an engine includes controlling an amount of fuel being injected into the plurality of cylinders of the engine via a respective fuel injector. An exhaust gas recirculation (EGR) system is in selective fluid communication with a second subset of the plurality of cylinders and the air intake system to route the second exhaust product from the second subset of the plurality of cylinders to an air intake system. A valve is coupled to the EGR system and the exhaust system. A first sensor is disposed between the valve and the air intake system, and measures an amount of reformate in the second exhaust product when the valve is in a second position.

公开(公告)号：US10371075B2

公开(公告)日：2019-08-06

申请号：US15741604

申请日：2016-07-06

Applicant: Hitachi Automotive Systems, Ltd.

Inventor： Shinya Matohara ,  Yoshihiko Akagi ,  Seiji Asano ,  Kazuhiro Oryoji

IPC: F02D41/14 ,  F02D41/04 ,  F02D43/00 ,  F02D45/00 ,  F02P5/15 ,  F02M25/08 ,  F02M26/46 ,  F02D41/00

Abstract: An EGR rate estimation method using an EGR valve opening area involves aggravated EGR rate estimation accuracy as an EGR valve is deteriorated and is unable to satisfy required accuracy when a target EGR rate is high. With a method for correcting a fuel injection amount by a fuel injection valve through estimation of a purge air-fuel ratio on the basis of variations in an air-fuel ratio variable depending on whether purging is performed, the fuel injection correction fails to accommodate the change in the air-fuel ratio when concentration of fuel evaporative emissions adsorbed by an activated carbon of a canister is high, resulting in reduced conversion efficiency of a catalyst. An arrangement includes an introduction port that is disposed in an intake pipe and through which a gas other than fresh air flows in the intake pipe and humidity sensors disposed upstream and downstream, respectively, of the introduction port. The EGR rate or the purge air-fuel ratio in the intake pipe is estimated using detection values of the respective humidity sensors.

公开(公告)号：US10196996B2

公开(公告)日：2019-02-05

申请号：US15644419

申请日：2017-07-07

Applicant: Ford Global Technologies, LLC

Inventor： Aed M. Dudar

IPC: B60W10/06 ,  B60W10/22 ,  B60W20/40 ,  F02D41/00 ,  F02D41/04 ,  F02D41/22 ,  F02M26/46

Abstract: Methods and systems are provided for a diagnostic of a humidity sensor positioned in an intake of an engine and adjusting engine operation responsive to findings of the diagnostic. In one example, the method may include sealing a vehicle exhaust system of an engine, combusting fuel at cylinders of the engine while flowing gases through the engine in a first direction, and then, flowing the combusted exhaust gases through the engine in a reverse, second direction to the humidity sensor positioned in the intake. The method may further include indicating degradation of the humidity sensor based on the output of the humidity sensor while flowing gases in the first and second directions.

公开(公告)号：US10138831B2

公开(公告)日：2018-11-27

申请号：US15657363

申请日：2017-07-24

Applicant: Mitsubishi Electric Corporation

Inventor： Michihisa Yokono ,  Hideki Hagari

IPC: B60T7/12 ,  F02D41/00 ,  F02M26/46

Abstract: To provide a controller and a control method for an internal combustion engine capable of learning the individual difference and the aging change of the flow characteristic of the EGR valve, by a method which is hardly influenced by the individual difference and the aging change of the internal combustion engine body, and improving the estimation accuracy of the flow rate of recirculation exhaust gas. The controller for an internal combustion engine calculates an oxygen concentration detecting EGR rate Regr based on the inner-manifold oxygen concentration; calculates an oxygen concentration detecting recirculation flow rate based on the oxygen concentration detecting EGR rate and the intake air flow rate, and calculates a learning value of the opening area of EGR valve; and calculates a flow rate of recirculation exhaust gas for control based on the learned opening area.