US20010009208A1 - Device for producing an overtone-rich sporty exhaust sound - Google Patents

Device for producing an overtone-rich sporty exhaust sound Download PDF

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Publication number
US20010009208A1
US20010009208A1 US09/764,917 US76491701A US2001009208A1 US 20010009208 A1 US20010009208 A1 US 20010009208A1 US 76491701 A US76491701 A US 76491701A US 2001009208 A1 US2001009208 A1 US 2001009208A1
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US
United States
Prior art keywords
pipe
pipes
cross
length
section
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.)
Abandoned
Application number
US09/764,917
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English (en)
Inventor
Bernd Fuhrmann
Friedrich Bielert
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.)
Tenneco GmbH
Original Assignee
Heinrich Gillet GmbH
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 Heinrich Gillet GmbH filed Critical Heinrich Gillet GmbH
Assigned to HEINRICH GILLET GMBH & CO. KG reassignment HEINRICH GILLET GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BIELERT, FRIEDRICH, FUHRMANN, BERND
Publication of US20010009208A1 publication Critical patent/US20010009208A1/en
Priority to US10/328,692 priority Critical patent/US6779628B2/en
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B27/00—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues
    • F02B27/04—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues in exhaust systems only, e.g. for sucking-off combustion gases

Definitions

  • the present invention relates to a device for producing an overtone-rich, sporty exhaust sound in four-cylinder engines.
  • the above object is met by selecting the length and/or cross-section of at least one of the exhaust pipes different from the length and/or cross-section of the other exhaust pipes, wherein at least some of the exhaust pipes lead into a first, second and/or third collecting point.
  • the present invention is based on the principle of delaying the sound events produced in the four cylinders of the engine at different times by providing different lengths and cross-sections of the exhaust gas-conducting pipes, so that superpositions occur at the collecting points of the pipes which correspond to a pulse pattern as it is known from six-cylinder, eight-cylinder or twelve-cylinder engines and, therefore, also contain the first, third, fifth, seventh, etc. harmonic and possibly the 1.5th, 2.5th, 3.5th, etc., harmonic of the basic frequency. It has been found in this connection that the exhaust sound subjectively even becomes quieter because the sound energy previously only contained in the second, fourth, sixth, etc., harmonic is transferred into the newly produced harmonics. In addition, the transformation is achieved equally well in the entire frequency range, as compared to previous solutions in which it was attempted to couple the lacking harmonics into the exhaust system by means of loudspeakers.
  • the length and/or cross-section of at least one manifold pipe deviate from the length and/or cross-section of the other manifold pipes. This makes it possible to produce the 1.5th, 2.5th, 3.5th, etc., harmonics.
  • two front pipes are provided wherein the length and/or cross-section of one front pipe differ from the length and/or cross-section of the other front pipe. This makes it possible to produce the third, fifth, seventh, etc., harmonics of the basic frequency.
  • At least two manifold pipes lead into the first collecting point where a front pipe begins.
  • the two other manifold pipes can be combined at a second collecting point, as is the case in conventional four-cylinder engines.
  • two collecting pipes are provided which lead into the third collecting pipe, wherein the length and/or cross-section of one of the collecting pipes deviate from the length and/or cross-section of the other collecting pipe.
  • FIG. 1 is a schematic view of a four-cylinder engine with an exhaust system according to the prior art
  • FIG. 2 is a simplified pulse diagram of the first collecting point II in FIG. 1;
  • FIG. 3 is the simplified pulse diagram at the second collecting point III in FIG. 1;
  • FIG. 4 is the simplified pulse diagram at the third collecting point IV in FIG. 1;
  • FIG. 5 shows the frequency spectrum corresponding to the pulse diagram of FIG. 4;
  • FIG. 6 is a schematic illustration of a four-cylinder engine with an exhaust system according to the present invention.
  • FIG. 7 is the pulse diagram at the first collecting point VII of FIG. 6;
  • FIG. 8 is the pulse diagram at the second collecting point VIII of FIG. 6;
  • FIG. 9 is the pulse diagram at the third collecting point IX of FIG. 6.
  • FIG. 10 is the frequency spectrum corresponding to the pulse diagram of FIG. 9.
  • FIG. 1 of the drawing shows a four-cylinder internal combustion engine 1 and an exhaust system according to the prior art connected to the engine.
  • the exhaust system includes four manifold pipes 2 , 3 , 4 , 5 which meet in pairs in the first collecting points II and III, respectively.
  • Two front pipes 6 lead from these collecting points to a third collecting point IV.
  • Connected downstream of the collecting point IV are an exhaust muffler 7 and a tail pipe 8 .
  • FIG. 2 shows the simplified pulse diagram at the collecting point II. Blotted in the diagram is the amplitude A of the pulses produced in the cylinders 2 and 3 over the crank shaft angle ⁇ .
  • FIG. 3 shows in a similar diagram the pulses produced by the cylinders 1 and 4 at the collecting point III.
  • FIG. 4 shows the pulse diagram at the collecting point IV at the end of the two front pipes 6 resulting from the pulse diagrams of FIGS. 2 and 3.
  • FIG. 5 shows the frequency spectrum corresponding to the pulse diagram of FIG. 4. Shown are the second, fourth, sixth, eighth, etc., harmonic H 2 , H 4 , H 6 , H 8 belonging to the basic frequency predetermined by the engine speed, wherein the amplitude of the harmonics H 2 , H 4 , H 4 , H 8 decreases continuously. Since the third, fifth, seventh, etc., harmonics as well as the 1.5th, 2.5th, 3.5th, etc., harmonics are missing, the “unsporty” exhaust noise typical for four-cylinder engines is produced at the tailpipe 8 of the exhaust system of FIG. 1.
  • FIG. 6 shows the same four-cylinder engine 1 , except that it is provided with an exhaust system changed in accordance with the present invention.
  • the four manifold pipes 2 , 3 , 4 , 5 are the same and also meet in collecting points II and III, respectively.
  • the front pipes 9 , 10 connected downstream of these connecting points differ from each other with respect to length as well as cross-section. Consequently, the pulses produced by the cylinders 2 , 3 and 1 , 4 travel with different speeds through the front pipes 9 , 10 ; this results in a completely different pulse diagram at the collecting point IX.
  • FIG. 7 shows the pulse diagram at the location VII in front of the collecting point IX. This pulse diagram corresponds to the pulse diagram of FIG. 2, but with a time delay.
  • FIG. 8 shows the pulse diagram at the location VIII in front of the collecting point IX. It can be seen that the pulses of FIG. 8 are time-delayed as compared to the pulses of FIG. 3.
  • FIG. 9 shows the pulse diagram resulting at the collecting point IX. This pulse diagram differs significantly from that of FIG. 4.
  • FIG. 10 shows the frequency spectrum corresponding to the pulse diagram of FIG. 9. It can be seen that now also the first harmonic H 1 , the third harmonic H 3 , etc., are present. It can further be seen that the amplitude of the second harmonic H 2 , the fourth harmonic H 4 , etc., is significantly lower because the sound energy contained therein has been transferred into the newly formed harmonics.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
  • Exhaust Gas After Treatment (AREA)
US09/764,917 2000-01-20 2001-01-18 Device for producing an overtone-rich sporty exhaust sound Abandoned US20010009208A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/328,692 US6779628B2 (en) 2000-01-20 2002-12-24 Device for producing an overtone-rich sporty exhaust sound

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10002240.5 2000-01-20
DE10002240A DE10002240B4 (de) 2000-01-20 2000-01-20 Vorrichtung zum Erzeugen eines obertonreichen sportlichen Auspuffgeräusches

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US10/328,692 Continuation US6779628B2 (en) 2000-01-20 2002-12-24 Device for producing an overtone-rich sporty exhaust sound

Publications (1)

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US20010009208A1 true US20010009208A1 (en) 2001-07-26

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US09/764,917 Abandoned US20010009208A1 (en) 2000-01-20 2001-01-18 Device for producing an overtone-rich sporty exhaust sound
US10/328,692 Expired - Lifetime US6779628B2 (en) 2000-01-20 2002-12-24 Device for producing an overtone-rich sporty exhaust sound

Family Applications After (1)

Application Number Title Priority Date Filing Date
US10/328,692 Expired - Lifetime US6779628B2 (en) 2000-01-20 2002-12-24 Device for producing an overtone-rich sporty exhaust sound

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US (2) US20010009208A1 (enExample)
JP (1) JP2001227338A (enExample)
DE (1) DE10002240B4 (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050115231A1 (en) * 2003-12-01 2005-06-02 Nissan Motor Co., Ltd. Exhaust manifold for internal combustion engine
US20140290232A1 (en) * 2013-03-30 2014-10-02 Honda Motor Co., Ltd. Exhaust pipe structure for internal combustion engine

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003262120A (ja) 2002-03-08 2003-09-19 Nissan Motor Co Ltd ４気筒エンジンの排気マニホールド
DE102005025502B4 (de) * 2005-06-03 2008-02-28 Heinrich Gillet Gmbh Verfahren und Vorrichtung zur Dimensionierung der Akustik einer Abgasanlage für Verbrennungsmotoren
JP2007205174A (ja) * 2006-01-31 2007-08-16 Toyota Motor Corp 内燃機関
JP4843550B2 (ja) * 2007-04-19 2011-12-21 株式会社ユタカ技研 多気筒エンジン用排気管
US10727023B2 (en) 2018-05-07 2020-07-28 Moxtek, Inc. X-ray tube single anode bore

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1035973B (de) * 1955-08-19 1958-08-07 Maschf Augsburg Nuernberg Ag Abgasschalldaempfungsanlage fuer Mehrzylinder-Brennkraftmaschinen
US4197704A (en) * 1976-06-11 1980-04-15 Honda Giken Kogyo Kabushiki Kaisha Exhaust manifold for internal combustion engine
US4373329A (en) * 1980-06-30 1983-02-15 Tenneco Inc. Tubular exhaust manifold
US4731995A (en) * 1986-11-05 1988-03-22 Edelbrock Corporation Exhaust manifold and an improved exhaust manifold, intake manifold and engine combination
DE19917604C5 (de) * 1998-04-20 2009-09-10 Honda Giken Kogyo K.K. Wärmeisolierter Abgaskrümmer

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050115231A1 (en) * 2003-12-01 2005-06-02 Nissan Motor Co., Ltd. Exhaust manifold for internal combustion engine
US7669412B2 (en) 2003-12-01 2010-03-02 Nissan Motor Co., Ltd. Exhaust manifold for internal combustion engine
US20100115933A1 (en) * 2003-12-01 2010-05-13 Nissan Motor Co., Ltd. Exhaust manifold for internal combustion engine
US8459016B2 (en) 2003-12-01 2013-06-11 Nissan Motor Co., Ltd. Exhaust manifold for internal combustion engine
US20140290232A1 (en) * 2013-03-30 2014-10-02 Honda Motor Co., Ltd. Exhaust pipe structure for internal combustion engine
US9328647B2 (en) * 2013-03-30 2016-05-03 Honda Motor Co., Ltd. Exhaust pipe structure for internal combustion engine

Also Published As

Publication number Publication date
DE10002240A1 (de) 2001-07-26
JP2001227338A (ja) 2001-08-24
US6779628B2 (en) 2004-08-24
US20030089550A1 (en) 2003-05-15
DE10002240B4 (de) 2007-12-20

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Date Code Title Description
AS Assignment

Owner name: HEINRICH GILLET GMBH & CO. KG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:FUHRMANN, BERND;BIELERT, FRIEDRICH;REEL/FRAME:011683/0169;SIGNING DATES FROM 20010111 TO 20010118

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION