EP1239143A2 - Dispositif d'échantillonnage de pression pour échantillonner une pression interne d'un tube d'admission d'un moteur à combustion interne - Google Patents
Dispositif d'échantillonnage de pression pour échantillonner une pression interne d'un tube d'admission d'un moteur à combustion interne Download PDFInfo
- Publication number
- EP1239143A2 EP1239143A2 EP02004229A EP02004229A EP1239143A2 EP 1239143 A2 EP1239143 A2 EP 1239143A2 EP 02004229 A EP02004229 A EP 02004229A EP 02004229 A EP02004229 A EP 02004229A EP 1239143 A2 EP1239143 A2 EP 1239143A2
- 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.)
- Granted
Links
- 238000005070 sampling Methods 0.000 title claims abstract description 101
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 25
- 239000006096 absorbing agent Substances 0.000 claims abstract description 18
- 239000011148 porous material Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 9
- 230000010355 oscillation Effects 0.000 description 9
- 239000000446 fuel Substances 0.000 description 5
- 230000010349 pulsation Effects 0.000 description 3
- 230000004043 responsiveness Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Images
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.
- 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.
Landscapes
- 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)
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 true EP1239143A2 (fr) | 2002-09-11 |
EP1239143A3 EP1239143A3 (fr) | 2007-03-14 |
EP1239143B1 EP1239143B1 (fr) | 2008-05-28 |
Family
ID=18925209
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20020004229 Expired - Lifetime EP1239143B1 (fr) | 2001-03-09 | 2002-02-26 | Dispositif d'échantillonnage de pression pour échantillonner une pression interne d'un tube d'admission d'un moteur à combustion interne |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1239143B1 (fr) |
JP (1) | JP2002266676A (fr) |
DE (1) | DE60226798D1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018047136A1 (fr) * | 2016-09-12 | 2018-03-15 | Tvs Motor Company Limited | Montage d'élément de détection pour véhicule à deux roues |
Families Citing this family (4)
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 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5540223A (en) * | 1978-09-14 | 1980-03-21 | Hitachi Ltd | Engine intake air measuring device |
EP0203814A2 (fr) * | 1985-05-29 | 1986-12-03 | Honda Giken Kogyo Kabushiki Kaisha | Méthode de commande de la quantité d'air d'admission d'un moteur à combustion interne |
-
2001
- 2001-03-09 JP JP2001066754A patent/JP2002266676A/ja active Pending
-
2002
- 2002-02-26 DE DE60226798T patent/DE60226798D1/de not_active Expired - Fee Related
- 2002-02-26 EP EP20020004229 patent/EP1239143B1/fr not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5540223A (en) * | 1978-09-14 | 1980-03-21 | Hitachi Ltd | Engine intake air measuring device |
EP0203814A2 (fr) * | 1985-05-29 | 1986-12-03 | Honda Giken Kogyo Kabushiki Kaisha | Méthode de commande de la quantité d'air d'admission d'un moteur à combustion interne |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018047136A1 (fr) * | 2016-09-12 | 2018-03-15 | Tvs Motor Company Limited | Montage d'élément de détection pour véhicule à deux roues |
Also Published As
Publication number | Publication date |
---|---|
EP1239143B1 (fr) | 2008-05-28 |
JP2002266676A (ja) | 2002-09-18 |
EP1239143A3 (fr) | 2007-03-14 |
DE60226798D1 (de) | 2008-07-10 |
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