中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

113 records (took 0.016 seconds)

    INTERNAL COMBUSTION ENGINE
    71.
    发明专利
    INTERNAL COMBUSTION ENGINE 审中-公开

    公开(公告)号：JP2003166434A

    公开(公告)日：2003-06-13

    申请号：JP2001366329

    申请日：2001-11-30

    Applicant: TOYOTA MOTOR CORP

    Inventor： ITO TAKEKAZU ,  MATSUOKA HIROKI ,  SUGIYAMA TATSUMASA ,  OTSUBO YASUHIKO ,  AOYAMA TARO ,  TAWARA ATSUSHI

    IPC: F02M25/07 ,  F02D21/08 ,  F02D41/02 ,  F02D41/04 ,  F02D43/00 ,  F02D45/00

    Abstract: PROBLEM TO BE SOLVED: To provide an internal combustion engine which adopts a control system for optimizing exhaust characteristics by adjusting a gas amount and sufficiently ensures the stability of an engine output even under the condition that an amount of inert gas in air-fuel mixture supplied to the combustion of the engine exceeds a value at which a generation amount of soot becomes the maximum. SOLUTION: An ECU 80 for controlling the operation of the engine 1 integrally attempts to stabilize a combustion condition first by operating a fuel injection time while continuing low temperature combustion when fluctuation of number of revolution NE of the engine is detected as parameter for reflecting the instability of combustion condition during low temperature combustion. If the instability of combustion condition is not eliminated by the operation of fuel injection time, the ECU 80 confirms that the combustion condition of the engine 1 is unstable due to fluctuation of characteristics of EGR gas accompanied with low temperature combustion and repeats the interruption and restart of low temperature combustion until the characteristics of EGR gas are stabilized. COPYRIGHT: (C)2003,JPO

    EXHAUST EMISSION CONTROL DEVICE AND METHOD FOR INTERNAL COMBUSTION ENGINE
    74.
    发明专利
    EXHAUST EMISSION CONTROL DEVICE AND METHOD FOR INTERNAL COMBUSTION ENGINE 审中-公开

    公开(公告)号：JP2003148132A

    公开(公告)日：2003-05-21

    申请号：JP2001342134

    申请日：2001-11-07

    Applicant: TOYOTA MOTOR CORP

    Inventor： SUGIYAMA TATSUMASA ,  MATSUOKA HIROKI ,  AOYAMA TARO ,  OTSUBO YASUHIKO ,  ITO TAKEKAZU ,  TAWARA ATSUSHI

    IPC: F01N3/02 ,  F01N3/025 ,  F01N3/035 ,  F01N3/08 ,  F01N3/24 ,  F02D41/02 ,  F02D41/04 ,  F02D41/14 ,  F02D41/38 ,  F02D41/40

    Abstract: PROBLEM TO BE SOLVED: To prevent regeneration inhibition of fine particles due to combustion instability, exhaust gas deterioration and filter clogging of additional fuel, etc., caused by various situations of an internal combustion engine and an exhaust passage, when a particulate filter is regenerated by oxidation and burning of fine particles trapped in the particulate filter by adding fuel. SOLUTION: A fuel addition means in a combustion chamber to add a part of fuel injected in the combustion chamber 20 as secondary injection fuel, and a fuel addition means in an exhaust passage to inject fuel directly and add it into the exhaust passage, are used as a fuel addition method. When a secondary fuel injection is possible and a bed temperature of a particulate filter 42a is not less than the first temperature, the fuel addition means in the combustion chamber is used. When an exhaust passage temperature is not less than the second temperature and the bed temperature of the particulate filter 42a is not less than the third temperature, the fuel addition means in the exhaust passage is used. When satisfying the conditions that both the fuel addition means in the combustion chamber and the fuel addition means in an exhaust passage can be performed, either means or both means are used.

    EXHAUST EMISSION CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE HAVING INJECTION TIMING CORRECTION FUNCTION
    76.
    发明专利
    EXHAUST EMISSION CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE HAVING INJECTION TIMING CORRECTION FUNCTION 失效

    公开(公告)号：JP2002195085A

    公开(公告)日：2002-07-10

    申请号：JP2000393817

    申请日：2000-12-25

    Applicant: TOYOTA MOTOR CORP

    Inventor： HARADA YASUO ,  MATSUSHITA SOICHI ,  OKI HISASHI ,  HAYASHI KOTARO ,  ISHIYAMA SHINOBU ,  KOBAYASHI MASAAKI ,  SHIBATA DAISUKE ,  ODA TOMIHISA ,  MAGATA HISAFUMI ,  NEGAMI AKIHIKO ,  MATSUOKA HIROKI ,  OTSUBO YASUHIKO ,  AOYAMA TARO ,  TAWARA ATSUSHI

    IPC: F02M25/07 ,  B01D53/86 ,  B01D53/94 ,  F01N3/08 ,  F01N3/24 ,  F01N3/28 ,  F02D41/40

    Abstract: PROBLEM TO BE SOLVED: To provide an exhaust emission control device of an internal combustion engine, having injection timing correcting function for properly controlling fuel injection by correcting a lag in the injection timing due to the deterioration with the lapse of time. SOLUTION: This internal combustion engine has a lean burn combustion internal-combustion engine 1, a NOx catalyst 20 arranged in an exhaust passage 18, a NOx purification control means for performing NOx purifying processing, and exhaust gas recirculating devices 25, 26 and 27 for recirculating a part of exhaust gas to an intake system of the internal combustion engine 1, by connecting the exhaust passage 18 and an intake passage 8. The internal combustion engine is characterized, by having a target injection timing calculating mans for calculating the target injection timing, according to an engine speed and injection fuel quantity; a combustion pressure sensor 2a for detecting combustion pressure in a cylinder 2; an actual injection timing calculating means for calculating the actual injection timing which is the optimal injection timing from a differential value of the waveform of the combustion pressure detected by the combustion pressure sensor 2a; an injection timing difference calculating means for calculating a lag in the injection timing, by comparing the calculated target injection timing with the actual injection timing; and an injection timing correcting means for correcting the injection timing on the basis of deviation quantity calculated by the injection timing deviation calculating means.

    EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
    79.
    发明专利
    EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE 失效

    公开(公告)号：JP2000257417A

    公开(公告)日：2000-09-19

    申请号：JP5844899

    申请日：1999-03-05

    Applicant: TOYOTA MOTOR CORP

    Inventor： KOBAYASHI MASAAKI ,  TSUKASAKI YUKIHIRO ,  ISHIYAMA SHINOBU ,  TAWARA ATSUSHI ,  OBATA KIYOSHI ,  YANAGIHARA HIROMICHI

    IPC: B01D53/94 ,  B01J23/58 ,  F01N3/08 ,  F01N3/20 ,  F01N3/24 ,  F01N3/28

    Abstract: PROBLEM TO BE SOLVED: To prevent hydrocarbons from flowing into the downstream side of NOx occlusion reduction catalyst. SOLUTION: An exhaust emission control converter 10 is placed on an exhaust path 3 of an internal combustion engine 1. The exhaust emission control converter 10 is configured to arrange a NOx occlusion reduction catalyst 7, HC absorbent member 11, oxidation catalyst 13 in this order from the upstream inside a casing. The HC absorbent member 11 selectively absorbs heavy hydrocarbon components among the exhaust air, and when the temperature rises it converts the absorbed heavy hydrocarbons into light hydrocarbons and emits it. When a reductant (fuel) is supplied from a reductant supply device 9 into an exhaust path, at the upstream of the converter 10 at low temperatures, hydrocarbons that did not react on NOx occlusion reduction catalyst 7 flow to the downstream of the catalyst 7. Among those hydrocarbons, heavy components are adsorbed into the HC adsorbent member, while light component is purified further by oxidation catalyst at the downstream side. Hydrocarbons emitted from the HC adsorbent member after the temperature rises are purified by oxidation catalyst on the downstream side, therefore emission of hydrocarbons into the air is prevented completely.

    EXHAUST GAS EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
    80.
    发明专利
    EXHAUST GAS EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE 失效

    公开(公告)号：JP2000240442A

    公开(公告)日：2000-09-05

    申请号：JP4496999

    申请日：1999-02-23

    Applicant: TOYOTA MOTOR CORP

    Inventor： KOBAYASHI MASAAKI ,  TSUKASAKI YUKIHIRO ,  ISHIYAMA SHINOBU ,  TAWARA ATSUSHI

    IPC: F01N3/08 ,  F01N3/20 ,  F01N3/36

    Abstract: PROBLEM TO BE SOLVED: To improve reliability of a reducing agent feeding device during regeneration operation of an NOX occlusion reduction catalyst and to prevent worsening of an exhaust property. SOLUTION: An NOX occlusion reduction catalyst 7 is arranged in the exhaust passage 3 of an engine 1 to absorb NOX contained in exhaust gas of an engine under lean air-fuel ratio operation. When an NOX occlusion amount of the catalyst 7 is increased, a liquid reducing agent (light oil) is injected in the exhaust passage, situated upper stream from the catalyst 7, through a reducing agent injection valve 91 and NOX is emitted from the catalyst 7 for reduction purification. An electronic control unit(ECU) 30 opens an electromagnetic cutoff valve 91e during completion of injection of a reducing agent, discharges fuel remaining in a spot situate upper stream from the nozzle 91a of the reducing agent injection valve 91 through a communication piping 91d, and prevents leakage of fuel from the nozzle 91a after completion of injection. Since leakage of fuel is reliably prevented from occurring regardless of the length of a connection piping 91c, the control valve 91b is installed at a part not influenced by the heat of the exhaust passage.

Patent Agency Ranking