EP1239143B1 - Druckprobenahmevorrichtung für interne Druckprobenahme in einem Ansaugrohr einer Brennkraftmaschine - Google Patents

Druckprobenahmevorrichtung für interne Druckprobenahme in einem Ansaugrohr einer Brennkraftmaschine Download PDF

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Publication number
EP1239143B1
EP1239143B1 EP20020004229 EP02004229A EP1239143B1 EP 1239143 B1 EP1239143 B1 EP 1239143B1 EP 20020004229 EP20020004229 EP 20020004229 EP 02004229 A EP02004229 A EP 02004229A EP 1239143 B1 EP1239143 B1 EP 1239143B1
Authority
EP
European Patent Office
Prior art keywords
pressure
sampling
damper
pipe
intake pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
EP20020004229
Other languages
English (en)
French (fr)
Other versions
EP1239143A2 (de
EP1239143A3 (de
Inventor
Shigeru Yamazaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mikuni Corp
Original Assignee
Mikuni Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mikuni Corp filed Critical Mikuni Corp
Publication of EP1239143A2 publication Critical patent/EP1239143A2/de
Publication of EP1239143A3 publication Critical patent/EP1239143A3/de
Application granted granted Critical
Publication of EP1239143B1 publication Critical patent/EP1239143B1/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10295—Damping means, e.g. tranquillising chamber to dampen air oscillations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10373—Sensors for intake systems
    • F02M35/1038—Sensors for intake systems for temperature or pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1255—Intake silencers ; Sound modulation, transmission or amplification using resonance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1272—Intake silencers ; Sound modulation, transmission or amplification using absorbing, damping, insulating or reflecting materials, e.g. porous foams, fibres, rubbers, fabrics, coatings or membranes

Definitions

  • the present invention relates to a device or an arrangement for sampling an internal pressure of an intake pipe of a combustion engine, and more particularly relates to an internal pressure sampling device or arrangement, respectively, for an internal combustion engine intake pipe wherein a pressure sensor for detecting the pressure within the intake pipe is located away from the intake pipe, in accordance with claim 1.
  • a pressure sensor is provided on the intake pipe, and the amount of intake air is then calculated by taking the pressure within the intake pipe detected by the pressure sensor as a parameter.
  • a pressure sensor 1 is preferably located as close as possible to the intake pipe 2 in order to give good detection response and detection precision, as shown in Figure 16 .
  • a sampling pipe 3 is connected to the intake pipe 2 and the pressure sensor 1 is installed via the sampling pipe 3.
  • the present invention sets out to provide an internal pressure sampling device for an intake pipe of an internal combustion engine which is capable of sampling the pressure within the intake pipe in a highly precise manner, even when the pressure sensor is located away from the intake pipe.
  • a pressure sampling device of the present invention comprises the features set forth in claim 1.
  • Useful embodiments of the invention are defined by the sub-claims.
  • a sampling pipe communicating with the intake pipe of the internal combustion engine; a damper fitted to one end of the sampling pipe; and a pressure sensor provided on the sampling pipe further towards the side of a pressure takeoff or equalisation opening of the sampling pipe than the damper, and which can in particular have an absorber communicating with the sampling pipe via the damper provided at an end of the sampling pipe.
  • the damper can be an orifice.
  • the damper can be made of a porous material provided with successive or adjacent air holes.
  • the absorber can be formed by providing an extension of the sampling pipe on the far side of the pressure takeoff or equalisation opening of the sampling pipe, beyond the damper, i.e. beyond a pressure sensor opening.
  • the pressure sensor, the damper and the absorber can be formed integrally with an engine control unit for carrying out the drive control of the internal combustion engine.
  • a sampling pipe 11 is provided on an intake pipe 10 of an internal combustion engine and communicates with the intake pipe 10 of the internal combustion engine via an opening 11a.
  • a damper 12 is fitted to one end of the sampling pipe 11, and a pressure sensor 14 is provided on the sampling pipe 11, further towards the side of a pressure takeoff or equalisation opening 11a of the sampling pipe 11 than the damper 12.
  • An absorber 13 communicating with the sampling pipe 11 via the damper 12 is provided at one end of the sampling pipe 11.
  • the damper 12 can be a passive damper, e.g. a sponge or a sieve, or it can comprise an active element, e.g. a piezoelectric element, a piezoelectric nozzle, or the like, which can be controlled to be opened or closed according to the sampled pressure in the sampling pipe 11 and thus in the intake pipe 10.
  • an active element e.g. a piezoelectric element, a piezoelectric nozzle, or the like.
  • the internal pressure sampling device for an intake pipe of an internal combustion engine of the embodiment shown in Figure 1 comprises: a sampling pipe 11 communicating with the intake pipe of the internal combustion engine (said engine not shown in the drawings); a damper 12 fitted to one end of the sampling pipe 11; a pressure sensor 14 provided on the sampling pipe 11, further towards the side of a pressure takeoff or equalisation opening 11a of the sampling pipe 11 than the damper 12; and an absorber 13 communicating with the sampling pipe 11 via the damper 12 at one end of the sampling pipe 11.
  • the pressure sensor 14 is provided close to the end of the sampling pipe 11 in this embodiment, it may also be provided anywhere on the sampling pipe 11 between the damper 12 and the intake pipe 10.
  • the damper 12 is formed by an orifice
  • the absorber 13 is formed by a box-shaped container.
  • the capacity of the absorber 13 is set according to the characteristics etc. of the internal combustion engine.
  • the damper 12 may be made of a porous material provided with successive or adjacent air holes, such as sponge.
  • a speed of 7500 rpm is maintained for the internal combustion engine employing the internal pressure sampling device for an intake pipe of an internal combustion engine of the embodiment constructed in the above manner, and detection results for the sampling pressure at low loads, medium loads and high loads at this frequency are shown in Figures 2 to 4 .
  • detection results for the sampling pressure when the sampling device shown in Figure 16 is used are shown in Figures 5 to 7
  • detection results for the sampling pressure when the sampling device shown in Figure 17 is used are shown in Figures 8 to 10
  • detection results for the sampling pressure when the sampling device shown in Figure 18 is used are shown in Figures 11 to 13 .
  • sampling results obtained for the sampling device of this embodiment are substantially the same as those obtained when the pressure sensor 1 is arranged close to the intake pipe 2 as shown in Figure 16 .
  • the pressure waveform for the sampling device shown in Figure 17 fluctuates more, due to the influence of the columnar oscillations of the sampling pipe 3 at high loads, while poor responsiveness is obtained with the sampling device shown in Figure 18 due to the influence of the damper 4, and the influence of this poor responsiveness is more prominent at higher loads.
  • detection results can be obtained which are close to the waveform for the pressure within the intake pipe 10 when there is little transmission delay, even when the pressure sensor 14 is positioned away from the intake pipe 10.
  • the air/fuel ratio of the air/fuel mixture supplied to the internal combustion engine can therefore be precisely controlled.
  • the damper 12 close to the pressure sensor 14 absorbs the air vibrations of the intake pulsations transmitted to the sampling pipe 11. Therefore, intake pulsations from the intake pipe 10 are not reflected, and air oscillations within the sampling pipe 11 do not occur.
  • the waveform of the pressure detected by the pressure sensor 14 itself can be input as substantially the same waveform as the waveform sampled directly at the intake pipe 10.
  • the above embodiments show an example in which the absorber 13 is a box-type container but, as shown in Figure 14 , the absorber 13 may also be formed by extending the sampling pipe 11 past the damper 12 and sealing its end with a sealing member 15.
  • a sampling hose or tube alone may then combine the functions of both the sampling pipe and the absorber.
  • the air/fuel ratio of the air/fuel mixture supplied to the internal combustion engine can therefore be precisely regulated.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Measuring Fluid Pressure (AREA)

Claims (8)

  1. Druckprobennahmevorrichtung zur Erfassung eines Drucks in einem Einlassrohr eines Verbrennungsmotors, wobei die Vorrichtung Folgendes umfasst:
    ein Probennahmerohr (11), das über eine Verbindungsöffnung (11a) mit dem Einlassrohr (10) verbunden ist;
    einen Dämpfer (12), der zum Wirken in dem Probennahmerohr (11) angeordnet ist;
    einen Drucksensor (14), der zur Erfassung des Drucks in dem Probennahmerohr (11) angeordnet ist;
    dadurch gekennzeichnet, dass
    der Drucksensor (14) an einer Stelle mit dem Probennahmerohr (11) in Verbindung steht, die sich näher an der Verbindungsöffnung (11a) befindet als die Stelle oder Anordnung des Dämpfers (12).
  2. Druckprobennahmevorrichtung nach Anspruch 1, wobei das Probennahmerohr mittels eines Dichtungsglieds (15) auf der anderen Seite des Dämpfers (12) und des Drucksensors (14) abgedichtet ist.
  3. Druckprobennahmevorrichtung nach Anspruch 2, wobei das Probennahmerohr (11) mittels eines Absorbers (13) abgedichtet ist.
  4. Druckprobennahmevorrichtung nach einem der Ansprüche 1 bis 3, wobei der Dämpfer (12) entweder ein passiver Dämpfer, zum Beispiel ein poröser Körper wie ein Schwamm oder ein Sinterkörper, oder ein aktiver Dämpfer, zum Beispiel ein piezomechanisches oder piezoelektrisches Element, ist, der gemäß dem erfassten Druck zur abgestimmten Dämpfung geöffnet bzw. geschlossen wird.
  5. Druckprobennahmevorrichtung nach einem der Ansprüche 1 bis 3, wobei der Dämpfer (12) eine Öffnung ist.
  6. Druckprobennahmevorrichtung nach einem der Ansprüche 1 bis 3, wobei der Dämpfer (12) aus einem porösen Material hergestellt ist, das mit aufeinander folgenden oder nebeneinander liegenden Luftlöchern versehen ist.
  7. Druckprobennahmevorrichtung nach einem der Ansprüche 3 bis 6, wobei der Absorber durch Bereitstellung einer Verlängerung (13) des Probennahmerohrs (11) auf der anderen Seite der Drucksensoröffnung (17) des Probennahmerohrs (11) hinter dem Dämpfer (12) gebildet wird.
  8. Druckprobennahmevorrichtung nach einem der Ansprüche 1 bis 7, wobei der Drucksensor (14), der Dämpfer 12 und der Absorber (13) integral mit einer Motorsteuereinheit (16) zur Durchführung der Antriebssteuerung des Verbrennungsmotors ausgebildet sind.
EP20020004229 2001-03-09 2002-02-26 Druckprobenahmevorrichtung für interne Druckprobenahme in einem Ansaugrohr einer Brennkraftmaschine Expired - Fee Related EP1239143B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001066754 2001-03-09
JP2001066754A JP2002266676A (ja) 2001-03-09 2001-03-09 内燃機関の吸気管内圧力サンプリング装置

Publications (3)

Publication Number Publication Date
EP1239143A2 EP1239143A2 (de) 2002-09-11
EP1239143A3 EP1239143A3 (de) 2007-03-14
EP1239143B1 true EP1239143B1 (de) 2008-05-28

Family

ID=18925209

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020004229 Expired - Fee Related EP1239143B1 (de) 2001-03-09 2002-02-26 Druckprobenahmevorrichtung für interne Druckprobenahme in einem Ansaugrohr einer Brennkraftmaschine

Country Status (3)

Country Link
EP (1) EP1239143B1 (de)
JP (1) JP2002266676A (de)
DE (1) DE60226798D1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008089507A (ja) * 2006-10-04 2008-04-17 Toyota Motor Corp センサ取り付け構造
US8256307B2 (en) * 2008-10-24 2012-09-04 Caterpillar Inc. Particulate sampling system and method of reducing oversampling during transients
JP2013024574A (ja) 2011-07-15 2013-02-04 Azbil Corp 導圧管の詰まり診断システムおよび診断方法
JP5791442B2 (ja) * 2011-09-20 2015-10-07 ダイハツ工業株式会社 内燃機関
WO2018047136A1 (en) * 2016-09-12 2018-03-15 Tvs Motor Company Limited Mounting of sensing element for a two-wheeled vehicle

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5540223A (en) * 1978-09-14 1980-03-21 Hitachi Ltd Engine intake air measuring device
US4700679A (en) * 1985-05-29 1987-10-20 Honda Giken Kogyo K.K. Intake air quantity control method for internal combustion engines

Also Published As

Publication number Publication date
EP1239143A2 (de) 2002-09-11
JP2002266676A (ja) 2002-09-18
DE60226798D1 (de) 2008-07-10
EP1239143A3 (de) 2007-03-14

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