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公开(公告)号：JP2002038939A
公开(公告)日：2002-02-06
申请号：JP2000223046
申请日：2000-07-24
Applicant: TOYOTA MOTOR CORP
Inventor： ONO TOMOYUKI , MATSUSHITA SOICHI , TSUKASAKI YUKIHIRO , MATSUOKA HIROKI , HAYASHI KOTARO , ISHIYAMA SHINOBU , OTSUBO YASUHIKO , MAGATA HISAFUMI , KOBAYASHI MASAAKI , SHIBATA DAISUKE , NEGAMI AKIHIKO , ODA TOMIHISA , HARADA YASUO
Abstract: PROBLEM TO BE SOLVED: To provide an exhaust emission control device for internal combustion engine equipped with a NOx catalyst functioning effectively with addition of a reducing agent capable of optimizing the purifying efficiency for NOx existing in the exhaust gas by obtaining the desired reduction components in the exhaust gas even in the case the easiness for the reducing agent to evaporate or be turned into fine particles varies. SOLUTION: When fuel injection to the exhaust system 40 of a Diesel engine 1 is to be executed, an electronic control device (ECU) 80 to perform the operational control of the engine 1 senses or presumes the rate of exhaust flow (or flow velocity), exhaust gas temperature and the inner wall temperature of the exhaust passage, and on the basis of obtained parameters, presumes the evaporating amount (amount turned into particulates) of the fuel supplied in injection from a fuel adding nozzle 17, and the control of deciding the injection amount and timing is conducted with the obtained data taken into account.
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公开(公告)号：JP2002038926A
公开(公告)日：2002-02-06
申请号：JP2000223055
申请日：2000-07-24
Applicant: TOYOTA MOTOR CORP
Inventor： MATSUOKA HIROKI , MATSUSHITA SOICHI , TSUKASAKI YUKIHIRO , HAYASHI KOTARO , ISHIYAMA SHINOBU , OTSUBO YASUHIKO , MAGATA HISAFUMI , KOBAYASHI MASAAKI , SHIBATA DAISUKE , NEGAMI AKIHIKO , ODA TOMIHISA , HARADA YASUO , ONO TOMOYUKI
Abstract: PROBLEM TO BE SOLVED: To supply an appropriate quantity of reducing agent to a NOX catalyst at all time even with changing operating condition of an internal combustion engine. SOLUTION: An exhaust emission control device of the internal combustion engine is composed of a NOX catalyst 17 installed in the exhaust passage of the engine able to make lean combustion and emitting the absorbed NOX and reducing with the reducing agent, a reducing agent supplying means 19 installed in the exhaust passage upstream of the catalyst 17, a load sensing means to sense the load of the engine 1, and a reducing agent addition control means to control the period of reducing agent addition and intervals of addition on the basis of the load of the engine 1. The period of reducing agent addition and intervals are controlled while such factors are taken into account as the degree of reducing agent attachment to the wall surface inside the exhaust passage depending upon the flow speed and temperature of the exhaust gas in the engine 1, and thereby a sufficient quantity of reducing agent is supplied to the side with NOX catalyst irrespective of the operating situation.
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公开(公告)号：JP2002038925A
公开(公告)日：2002-02-06
申请号：JP2000223054
申请日：2000-07-24
Applicant: TOYOTA MOTOR CORP
Inventor： ODA TOMIHISA , MATSUSHITA SOICHI , TSUKASAKI YUKIHIRO , MATSUOKA HIROKI , HAYASHI KOTARO , ISHIYAMA SHINOBU , OTSUBO YASUHIKO , MAGATA HISAFUMI , KOBAYASHI MASAAKI , SHIBATA DAISUKE , NEGAMI AKIHIKO , HARADA YASUO , ONO TOMOYUKI
Abstract: PROBLEM TO BE SOLVED: To provide an exhaust emission control device for internal combustion engine capable of performing optimum adding of a reducing agent for reduction of the stored NOX and recovery of poisoned SOX without being influenced by eventual generation of various dispersions in the system. SOLUTION: The exhaust emission control device of the internal combustion engine is composed of an NOX catalyst 17, a fuel adding means 19 installed in the exhaust passage 16 upstream of the NOX catalyst 17, an adding amount calculating means to calculate the amount of fuel addition from the actual air-fuel ratio, amount of air suction and the temperature of the gas containing catalyst, a depth calculating means to calculate the rich depth when the fuel according to the calculation is added to the NOX catalyst 17, and a time calculating means to calculate from the given rich state the time required from the air-fuel ratio having changed into the lean state till attaining the lean state having a value obtained by multiplying the rich depth by a certain rate. The fuel addition at the next time is controlled on the basis of the data given by an adding amount correcting means to calculate the next fuel adding amount from the rich depth and time and an interval calculating means to calculate the fuel adding interval till fuel addition at the next time on the basis of the given rich depth.
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公开(公告)号：JP2001193440A
公开(公告)日：2001-07-17
申请号：JP2000006380
申请日：2000-01-12
Applicant: TOYOTA MOTOR CORP
Inventor： TSUKASAKI YUKIHIRO , NEGAMI AKIHIKO , MATSUSHITA SOICHI , ISHIYAMA SHINOBU
Abstract: PROBLEM TO BE SOLVED: To provide an exhaust emission control device for a diesel engine, capable of avoiding the increase of exhaust HC and the HC poisoning of a catalyst regardless of the operating condition of the diesel engine. SOLUTION: This device has an NOx catalyst formed in an exhaust pipe 31 for purifying the exhaust gas exhausted after burning an engine fuel and used for reducing NOx contained in the exhaust gas by using a reducing agent reducing agent feed devices 35, 37 disposed on the upstream side of the NOx catalyst and used for feeding the reducing agent to the NOx catalyst, a PM catching device positioned on the upstream side of the NOx catalyst and used for catching the PM of the exhaust gas, an ECU 11 which is a PM-catching state detection means for detecting the catching state of the PM caught by the ECU 11 as the PM catching device, and the ECU 11 as a reducing agent addition quantity correcting means for correcting the addition quantity of the reducing agent to the NOx catalyst by the reducing agent feeding devices, based on the catching state of the PM detected by the PM catching state detection means.
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公开(公告)号：JP2000027652A
公开(公告)日：2000-01-25
申请号：JP19333598
申请日：1998-07-08
Applicant: TOYOTA MOTOR CORP
Inventor： UMEHANA TOYOICHI , KOBAYASHI TATSUO , HATTORI FUMIAKI , HAJIMA TAKASHI , HOKUTOU HIROYUKI , KASHIWAKURA TOSHIMI , KANDA MUTSUMI , TANAKA KOHACHI , MATSUSHITA SOICHI , ABE SHIZUO , MURAMATSU NOBUYUKI
Abstract: PROBLEM TO BE SOLVED: To provide a cylinder injection type spark ignition internal combustion engine which can prevent occurrence of a misfire and which can surely enlarge the stratified combustion range on the high load side. SOLUTION: In a cylinder injection type spark ignition internal combustion engine comprising a spark plug, a cavity formed in the top surface of a piston, and a fuel injection valve for injecting fuel into the cavity in a thin sector-like shape. The side surface of the cavity has a first and a second deflecting path 82a, 82b for allowing a plurality of fuel parts to pass by at least two spark plugs in such a case that fuel injection from the fuel injection valve in the sector-like shape is radially divided into the plurality of fuel parts, and is formed therein with a turn-back part 83 projected inward of the cavity at least in part, the first fuel deflecting path 82a is not provided with the turn-back part 83, or is provided with a turn back part having a short projecting length, and the second fuel deflecting path 82b is provided with the turn-back part 83 having a long projecting length.
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Patent Agency Ranking
公开(公告)号：JPH1089192A
公开(公告)日：1998-04-07
申请号：JP26256396
申请日：1996-09-10
Applicant: TOYOTA CENTRAL RES & DEV , DENSO CORP , TOYOTA MOTOR CORP
Inventor： KINOSHITA MASAO , SAITO AKINORI , NIWA YUTAKA , OTANI HIROYUKI , MATSUSHITA SOICHI
Abstract: PROBLEM TO BE SOLVED: To reduce a change of the flow rate by restraining deposits from being formed and deposited on the inner surface of a nozzle hole. SOLUTION: In a fuel injection valve 1 in which a nozzle hole 3 is faced to a combustion chamber 2 of an internal combustion engine to directly inject and supply fuel to the combustion chamber, a temperature adjusting means 5 for adjusting the temperature of the tip of a nozzle on which the nozzle hole 3 is arranged to the 90% or less distillation point of fuel is composed of a heat flow forming means formed between the nozzle 8 on which the nozzle hole 3 is arranged and an engine head 4, and for discharging the heat flow to be supplied to the nozzle 8 to the engine head 4.
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公开(公告)号：JPH08232703A
公开(公告)日：1996-09-10
申请号：JP3529895
申请日：1995-02-23
Applicant: TOYOTA MOTOR CORP
Inventor： MASUSHIRO ZENICHIROU , MATSUSHITA SOICHI
Abstract: PURPOSE: To control fuel pressure securely unrelated to elasped change of discharge efficiency of a fuel pump or instrumental error caused from machine error of the fuel pump and capacity error of a fuel piping system. CONSTITUTION: Fuel stored in a fuel tank 251 is pressed by a booster pump 25 and fuel pump 53 and stored in a common rail and directly injected in a cylinder by fuel injection valves 211-214 disposed for every cylinder. Fuel pressure is detected by a pressure sensor 231 and compared with target pressure and to determine control amount in a control part 26, learning value is changed when the control amount excesses determined range and elapsed variation or machine error of the fuel pump and capacity error of a fuel piping system are absorbed to maintain pressure characteristic by correcting the control amount by learning value and determining operation amount of a fuel pressure control part 254.
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公开(公告)号：JPH07119513A
公开(公告)日：1995-05-09
申请号：JP26246393
申请日：1993-10-20
Applicant: TOYOTA MOTOR CORP
Inventor： GONO TAKESHI , MATSUSHITA SOICHI
Abstract: PURPOSE:To attempt compatibility between stable combustion condition whose torque fluctuation is small and low NOx combustion condition by detecting torque fluctuation of an internal combustion engine, and also controlling at least one of an intake throttle valve and an exhaust gas re-circulating means on the basis of its detected result. CONSTITUTION:In an engine main body 1, an electron throttle 4 acting as an intake throttle valve means is arranged in an intake manifold 3. An inter- cylinder injection valve 7 for injecting fuel directly in a cylinder 6 is provided. An EGR pipe 9 is arranged so as to return a part of exhaust gas staying in an exhaust manifold 8 into the intake manifold 3, and an EGR flow amount control valve 10 is interposed in the EGR pipe 9. In this case, combustion pressure in a cylinder is detected by a combustion pressure sensor 12 so as to detect torque fluctuation in the engine main body 1. At least one of the electron throttle 4 and the EGR flow amount control valve 10 is controlled by an electron control unit 20 on the basis of the detected torque fluctuation.
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公开(公告)号：JPH0671111A
公开(公告)日：1994-03-15
申请号：JP22866492
申请日：1992-08-27
Applicant: AISIN SEIKI , TOYOTA MOTOR CORP , TOYOTA CENTRAL RES & DEV
Inventor： TORII ATSUSHI , SAKAGAMI EIJI , IKEGAWA ATSUTOSHI , MATSUSHITA SOICHI , OSHIMA YUJIRO
Abstract: PURPOSE:To provide a gas and liquid separating apparatus which can separate hydrogen gas efficiently from a mixture of hydrogen gas and water in a hydrogen gas supplying system. CONSTITUTION:A gas and liquid separating apparatus has a gas and liquid separating chamber 31 having a blowing outlet 31a in the circumferential wall and a labyrinth part 37 continuously installed in the upper part of the gas and liquid separating chamber 31. The labyrinth passage of the labyrinth part 37 is composed of passages 374-379. When a mixture of hydrogen gas and water is sent to the gas and liquid separating chamber 31 through the blowing outlet 31a, the mixture whirls along the inner wall face 31c and hydrogen gas is separated from water. Further, the hydrogen gas passes the labyrinth passage. Even if the water comes in the labyrinth passage, the possibility that water passes through the labyrinth is low.
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公开(公告)号：JPH0633283A
公开(公告)日：1994-02-08
申请号：JP18959192
申请日：1992-07-16
Applicant: TOYOTA CENTRAL RES & DEV , AISIN SEIKI , TOYOTA MOTOR CORP
Inventor： OSHIMA YUJIRO , ABE KATSUJI , KAWAHARA KAZUO , AKAGI MOTONAGA , MATSUSHITA SOICHI
Abstract: PURPOSE:To eliminate deficiency of water and to secure hydrogen generating capacity by arranging a water electrolytic cell using a proton conductive membrane in a water chamber, simultaneously supplying water and discharging O2 and water through a communicating hole formed in a partition wall on the O2 side and taking out H2 from an H2 outlet passage. CONSTITUTION:This H. generator is formed with a water chamber, a proton conductive membrane 21 arranged in the water chamber, partition walls 31 and 33 on the O2 side, partition walls 23 and 25 on the H2 side, an H2 outlet passage, etc. The annular partition walls 31 and 33 having a specified thickness demarcate an O2 generating chamber 19 on the one surface side of the have membrane 21 and have a hole 33o communicating with the water chamber. The annular partition walls 23 and 25 demarcate an H2 generating chamber 18 on the other surface side of the membrane 21 and are provided with an H2 outlet passage consisting of communicating holes 27H-21H and 30H-35H.
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