公开(公告)号：JPH1136962A

公开(公告)日：1999-02-09

申请号：JP19435897

申请日：1997-07-18

Applicant: TOYOTA MOTOR CORP

Inventor： KIBE KAZUYA ,  GOTO MASAHITO ,  MIZUNO TATSUJI

IPC: F02M25/07 ,  F02B3/06 ,  F02D21/08 ,  F02D41/00 ,  F02D41/02 ,  F02D41/04 ,  F02D41/14 ,  F02D41/38 ,  F02D43/00

Abstract: PROBLEM TO BE SOLVED: To securely prevent the occurrence of exhaust smoke at the time of acceleration of a diesel engine. SOLUTION: An intake air throttle valve 6 is provided in the intake air passage 2 of a diesel engine 1, and EGR is performed by an EGR control valve 9. Also a control circuit (ECU) 30 adjusts an intake air throttle valve opening and EGR control valve 9 opening so as to control an engine intake air amount (fresh air amount) to an amount according to an engine load. In addition, the ECU 30 detects the amount of fresh air sucked actually into an engine using an air flow meter 11 arranged in the intake air passage, sets the maximum value of the fuel injection amount at which exhaust smoke is not produced according to the detected fresh air amount air amount and an engine speed, and the fuel injection amount is limited to the maximum value. By this, the fuel injection amount is set in the area where any smoke is not produced in relation to the actually sucked amount of air. Thus smoke due to operating delay of an EGR control valve 30 is prevented from producing during transient operations such as acceleration.

公开(公告)号：JPH10280987A

公开(公告)日：1998-10-20

申请号：JP8529497

申请日：1997-04-03

Applicant: TOYOTA MOTOR CORP

Inventor： GOTO MASAHITO ,  KATO KENJI ,  ASANUMA TAKAMITSU

IPC: F02D45/00 ,  B01D53/94 ,  F01N3/08 ,  F01N3/20 ,  F01N3/24 ,  F01N3/28 ,  F02D41/00 ,  F02D41/02 ,  F02D41/04

Abstract: PROBLEM TO BE SOLVED: To avoid NOx emission from NOx absorbent during stopping of an engine. SOLUTION: NOx absorbent 18 is arranged in an exhaust pipe 17 in an internal combustion engine 1, and a controlling circuit 30 which controls the amount of injected fuel in the engine 1 is provided. The control circuit 30 operates the engine 1 at lean air-fuel ratio, and estimates amount of NOx absorbed by the NOx absorbent 18, and when the amount of absorbed NOx reaches a specified value, operates the engine 1 at rich air-fuel ratio, emits NOx from the NOx absorbent, and reduces and purifies it. When an enginestop operation is done, the control circuit 30 does not stop the engine immediately after the stopping operation, and stops the engine after a specific period operation at rich airfuel ratio. Thus, NOx is emitted from the NOx absorbent and it is reduced and purified. Because NOx is not kept in the NOx absorbent during stopping of the engine, decrease of the NOx absorbent temperature after stopping of the engine is prevented from causing emission of non-purified NOx from the NOx absorbent.

公开(公告)号：JPH08189389A

公开(公告)日：1996-07-23

申请号：JP289495

申请日：1995-01-11

Applicant: TOYOTA MOTOR CORP

Inventor： GOTO MASAHITO

IPC: F02D41/04 ,  F02D41/14

Abstract: PURPOSE: To control based on dilute air fuel ratio in wider range while suppressing drivability from lowering in an air fuel ratio control device of an internal combustion engine which controls the air fuel ratio to a dilute air fuel ratio when the internal combustion engine is under stationary operation. CONSTITUTION: When a throttle opening TA exceeds a threshold TALS, a target air fuel ratio is switched over from a dilute air fuel ratio to a theoretical air fuel ratio because the load condition of an internal combustion engine is under high load. Also it is judged whether or not the operating condition of the internal combustion engine is changed to the condition under which TA> TALS is established (Step 300). When this condition is established, l degree is added to TALS so as to vary TALS gradually to high load side (Step 302). When TALS does not exceed the upper limit TALSMX, the switching of the target air fuel ratio is judged based on its TALS and, when TALS exceeds the upper limit TALSMX, it is judged based on the TALSMX.

公开(公告)号：JPH0861113A

公开(公告)日：1996-03-05

申请号：JP20070094

申请日：1994-08-25

Applicant: TOYOTA MOTOR CORP

Inventor： KABANO KAZUYUKI ,  GOTO MASAHITO ,  TANAKA MASAHARU

IPC: F02D29/00 ,  F02D41/04 ,  F16H61/14

Abstract: PURPOSE: To secure a proper fuel consumption quantity by slipping control of a lockup clutch. CONSTITUTION: A lockup clutch 23 provided with a lockup clutch plate 28 is arranged inside a torque converter 22, and a slipping quantity of the lockup clutch 23 is controlled by a control valve 34. Variation of an air-fuel ratio in air-fuel mixture which is more than a preset constant value is inhibited during the slipping control transient period until the time of transfer to the slip normal control, after the slipping control of the lockup clutch 23 is started.

公开(公告)号：JPH06272546A

公开(公告)日：1994-09-27

申请号：JP5741493

申请日：1993-03-17

Applicant: TOYOTA MOTOR CORP

Inventor： KIHARA TETSUO ,  NOHIRA HIDETAKA ,  IGUCHI SATORU ,  KATO KENJI ,  GOTO MASAHITO ,  ASANUMA TAKAMITSU

IPC: F02D41/04 ,  F01N3/08 ,  F01N3/18 ,  F01N3/20 ,  F01N3/24 ,  F02D45/00

Abstract: PURPOSE:To provide an exhaust emission control device for internal combustion engine which always can maintain a high efficiency of exhaust purification while preventing an engine output from unexpected variation in the regeneration of an NOX absorbent. CONSTITUTION:An NOX absorbent 7 is connected to an exhaust pipe 6 of an internal combustion engine 1 to absorb the NOX in the exhaust. An electronic control unit 20 of the engine detects an amount of the NOX absorbed by the NOX absorbent to warn a driver with an alarm 19 when the absorption amount exceeds a predetermined value, while increasing a fuel injection amount through a fuel injection valve 5 to regenerate the NOX absorbent when a predetermined requirement is established.

公开(公告)号：JPH06108824A

公开(公告)日：1994-04-19

申请号：JP30705892

申请日：1992-11-17

Applicant: TOYOTA MOTOR CORP

Inventor： KATO KENJI ,  WATANABE HARUO ,  NAKANISHI KIYOSHI ,  IGUCHI SATORU ,  GOTO MASAHITO

IPC: F01N3/08 ,  F02D43/00 ,  F02P5/15

Abstract: PURPOSE:To suppress variation of output torque in an internal combustion engine by decreasing the output torque, which tends to increase simultaneously with decrease of oxygen concentration, when the oxygen concentration in exhaust gas is decreased through controlling mixture for emitting the NOX absorbed at the period of lean exhaust gas. CONSTITUTION:In an internal combustion engine 1, NOX absorbent 18 is arranged in an exhaust pipe 17. A spark plug 4, a fuel injection valve 11, a by-pass control valve 21 and an electromagnetic clutch 23 are controlled by means of an electronic control unit 30 on the basis of the respective signals detected by the air flow meter 13, a throttle switch 25, a rotational speed sensor 26 and a car speed sensor 27 respectively. In other words, in order to emit the NOX absorbed by the NOX absorbent 18 when the air-fuel ratio of the exhaust gas is lean, the mixture is controlled so as to make the air-fuel ratio rich, and oxygen concentration in the exhaust gas is decreased. In this case, ignition timing of the spark plug 4, for example, is delayed so as to decrease the output torque, which tends to increase simultaneously with the decrease of oxygen concentration, in the internal combustion engine 1. Thus, it is possible to suppress the variation of output torque in the internal combustion engine 1.

公开(公告)号：JPH0688518A

公开(公告)日：1994-03-29

申请号：JP16277893

申请日：1993-06-30

Applicant: TOYOTA MOTOR CORP

Inventor： KATO KENJI ,  TAKESHIMA SHINICHI ,  TANAKA TOSHIAKI ,  IGUCHI SATORU ,  GOTO MASAHITO ,  KIHARA TETSUO ,  ASANUMA TAKAMITSU ,  MURAKAMI FUMIYASU

IPC: F01N3/08 ,  B01D53/04 ,  B01D53/86 ,  B01D53/94 ,  F01N3/20 ,  F01N3/24 ,  F01N13/02 ,  F02D41/02 ,  F02D41/14 ,  F02D45/00

Abstract: PURPOSE:To suppress SOx poisoning of NOx absorbing/cracking catalyst, and aim at regeneration from SOx poisoning. CONSTITUTION:In an exhaust gas purifying device provided with the NOx absorbing member 6 of alkaline earth metal oxide and the like in the exhaust passage 4 of a lean combustible internal combustion engine, an air fuel ratio is made in a strike or rich condition intermittently or continuously when the air fuel ratio is in lean condition, and exhaust gas is at a high temperature (for example 550 deg.C) or when the absorbing member 6 is at a high temperature.

公开(公告)号：JPH0666129A

公开(公告)日：1994-03-08

申请号：JP21614592

申请日：1992-08-13

Applicant: TOYOTA MOTOR CORP

Inventor： GOTO MASAHITO ,  KIHARA TETSUO

IPC: F01N3/08 ,  F01N3/18 ,  F01N3/20 ,  F01N3/24 ,  F01N13/14 ,  F02D41/02 ,  F02D41/14 ,  F02D45/00

Abstract: PURPOSE:To release sulfur absorbed by an NOx absorber. CONSTITUTION:An NOx absorber 18 is arranged inside an engine exhaust passage for absorbing NOx when an air-fuel ratio of inflow of exhaust gas is lean, and releasing the absorbed NOx when an oxygen density in the inflow of the exhaust gas is decreased. Sulfur absorbing rate of the NOx absorber 18 is estimated. When the estimated sulfer absorbing rate exceeds a specified set value, an electric heater 20 is heated, the air-fuel ratio is switched from the lean air-fuel ratio to a theoretical air-fuel ratio, and the sulfur absorbed by the NOx absorber 18 is released.

公开(公告)号：JPH05106449A

公开(公告)日：1993-04-27

申请号：JP26645691

申请日：1991-10-15

Applicant: TOYOTA MOTOR CORP

Inventor： IWASHITA YOSHIHIRO ,  GOTO MASAHITO ,  KASHIWAKURA TOSHIMI

IPC: F01L1/34 ,  F01N13/10 ,  F02B27/06 ,  F02B75/22 ,  F02D13/02

Abstract: PURPOSE:To improve the suction efficiency and the engine output along a wide scope of rotation frequency area. CONSTITUTION:The control device of a V-type six-cylinder engine 1 is provided with variable valve timing mechanisms 51 and 52, a rotation frequency sensor 71, an absolute pressure sensor 72, a section area expanding part 44 on the way of an exhaust passage C, an exhaust control valve 46 in a communication pipe 45, and a CPU 74 to control the variable valve timing mechanisms 51 and 52 and the exhaust control valve 46. The CPU 74 opens the exhaust control valve 46 when the engine rotation frequency NE by the rotation frequency sensor 71 is at the preset first rotation frequency alpha or higher, or less than the second rotation frequency beta which is lower than the first rotation frequency alpha, so as to set the length of the propagation path of the pressure wave and the negative pressure wave at a specific length. And when the engine rotation frequency NE is higher than the second rotation frequency beta and lower than the first rotation frequency alpha, the CPU 74 closes the exhaust control valve 46, so as to make the length of the propagation path longer than a specific length.

公开(公告)号：JP2002371901A

公开(公告)日：2002-12-26

申请号：JP2001177450

申请日：2001-06-12

Applicant: Toyota Motor Corp ,  トヨタ自動車株式会社

Inventor： HASHIMOTO YOSHINOBU ,  GOTO MASAHITO ,  YOSHIZAKI KOJI ,  HIROTA SHINYA ,  SASAKI SHIZUO

IPC: F02D43/00 ,  F01N3/02 ,  F01N3/08 ,  F01N3/28

Abstract: PROBLEM TO BE SOLVED: To provide an exhaust emission control device for an internal combustion engine capable of optimizing exhaust emission control functions of a particulate filter and an NOx catalyst with the usage of a structure wherein the particulate filter for collecting fine particles in the exhaust gas and the NOx catalyst are arranged in series along n exhaust passage. SOLUTION: A filter casing 90 for purifying both of the fine particles and NOx contained in the exhaust gas, and a catalyst casing for reducing and purifying the NOx contained in the exhaust gas are provided in an engine 1 from the upstream to the downstream of an exhaust system 40 thereof. When an amount of the NOx stored in the catalyst casing 100 reaches a predetermine amount, an electronic control device 80 increases an amount of a reducing component in the exhaust gas and forms an exhaust flow passage for directly feeding the enriched exhaust gas to the catalyst casing 100 without passing through the filter casing 90 by driving a passage change-over valve 97.

Abstract translation: 要解决的问题：提供一种用于内燃机的废气排放控制装置，其能够优化微粒过滤器和NOx催化剂的废气排放控制功能，其结构是使用用于收集废气中的微粒的微粒过滤器 并且NOx催化剂沿着n个排气通道串联排列。 解决方案：一种用于净化废气中所含的细颗粒和NOx的过滤器壳体90以及用于减少和净化废气中所含的NOx的催化剂壳体，其设置在发动机1的上游至下游 排气系统40。 当催化剂壳体100中存储的NOx的量达到预定量时，电子控制装置80增加排气中的还原成分的量，形成用于将浓缩废气直接供给到催化剂壳体的排气流路 100，而不通过过滤器壳体90，通过驱动通道转换阀97。