EP2587043A1 - Ensemble d'admission pour un moteur à combustion interne - Google Patents

Ensemble d'admission pour un moteur à combustion interne Download PDF

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Publication number
EP2587043A1
EP2587043A1 EP11186880.8A EP11186880A EP2587043A1 EP 2587043 A1 EP2587043 A1 EP 2587043A1 EP 11186880 A EP11186880 A EP 11186880A EP 2587043 A1 EP2587043 A1 EP 2587043A1
Authority
EP
European Patent Office
Prior art keywords
intake
airbox
internal
combustion engine
intake assembly
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.)
Withdrawn
Application number
EP11186880.8A
Other languages
German (de)
English (en)
Inventor
Marco Cuniberti
Francesco Vattaneo
Caterina Venezia
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.)
Centro Ricerche Fiat SCpA
Original Assignee
Centro Ricerche Fiat SCpA
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 Centro Ricerche Fiat SCpA filed Critical Centro Ricerche Fiat SCpA
Priority to EP11186880.8A priority Critical patent/EP2587043A1/fr
Priority to EP12180110.4A priority patent/EP2679796B1/fr
Priority to US13/657,405 priority patent/US9845775B2/en
Publication of EP2587043A1 publication Critical patent/EP2587043A1/fr
Withdrawn legal-status Critical Current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
    • F02M35/10308—Equalizing conduits, e.g. between intake ducts or between plenum chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/1035—Details of the valve housing
    • F02D9/1055—Details of the valve housing having a fluid by-pass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/109—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps having two or more flaps
    • F02D9/1095—Rotating on a common axis, e.g. having a common shaft
    • 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
    • F02M35/10255—Arrangements of valves; Multi-way valves
    • 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

Definitions

  • the present description relates to an intake assembly for an internal-combustion engine with controlled ignition comprising a plurality of cylinders, wherein the intake assembly comprises an intake duct for each cylinder of the internal-combustion engine and an airbox defining a volume with which each intake duct is in fluid communication.
  • the term "tuning" is meant to indicate the choice of the geometry, in particular of the length and of the section of the ducts of the intake system in such a way that the pressure waves generated by the intake of fluid into the cylinders of the internal-combustion engine propagate within the intake assembly, enabling an increase of filling of the cylinders themselves (there is substantially obtained a sort of "natural supercharging").
  • the frequency of the pulses of the pressure waves that are generated in the intake system which depends - among other things - upon the r.p.m. of the internal-combustion engine, is exploited as reference for the choice of the length of the ducts so as to have, at the moment of intake, a pressure wave that travels towards the cylinder, compressing the fluid at inlet to the cylinder itself.
  • the mass of air that enters the cylinder is greater, a condition similar to what arises (of course for different reasons) with the action of a supercharging assembly on supercharged engines.
  • intake ducts of reduced length are used, whereas, in the case where it is desired to have a higher torque at low r.p.m., longer intake ducts are used.
  • FIG. 1 is a schematic illustration of an intake assembly 1 of a known type coupled to an internal-combustion engine 2, comprising a plurality of cylinders CY.
  • the internal-combustion engine 2 comprises two cylinders CY (here represented by way of example with cylinder head having four valves per cylinder), but it remains understood that the present description applies to any engine, regardless of the number of cylinders and the number of intake and exhaust valves.
  • the intake assembly 1 comprises, for each cylinder CY of the internal-combustion engine 2, an intake duct 4 in fluid communication with (and connected to) an airbox 6. Moreover installed on the airbox 6 is a throttle body 8 including a throttle valve 10. The throttle body 8 is in fluid communication with the external environment by means of an intake line 12 on which a filter element 14 is installed, which is in turn connected to an intake mouth 16 of the internal-combustion engine 2. As is known to the person skilled in the branch, the intake assembly 1 is coupled to the internal-combustion engine 2 in such a way that each intake duct 4 is in fluid communication with the corresponding cylinder CY. The airbox 6 and the filter element 14 introduce two localized capacities within the intake assembly 1.
  • the air is taken in through the intake mouth 16, traverses the filter element 14, the intake line 12, and the throttle body 8, to reach the airbox 6, from which it can be sent on towards the ducts 4.
  • the throttle valve 10 By regulating the position of the throttle valve 10 it is possible, as is known, to regulate the amount of air taken in by the engine 2.
  • the position of the airbox 6 downstream of the throttle body 8 varies tuning of the intake assembly 1.
  • the volume of the airbox 6 cannot be increased sufficiently to enable a satisfactory decoupling in so far as by so doing the volume of fluid "under throttle” (i.e., the volume of fluid comprised between the throttle body and the intake valves) would be too large, with the consequent unacceptable slowness in the dynamics of control of the air at inlet to the engine.
  • the volume of fluid "under throttle” i.e., the volume of fluid comprised between the throttle body and the intake valves
  • the system has a weak tuning for the frequency corresponding to the resonance frequency of the ducts 4, on account of the contained volume of the airbox 6, but at the same time also has a weak tuning at the resonance frequency of the entire system up to expansion of the filter element 14 in so far as the volume of the airbox 6 has acted as decoupling element.
  • the object of the invention is to overcome the technical problems described previously.
  • the object of the invention is to provide an intake assembly for an internal-combustion engine that will enhance tuning of the intake ducts, by increasing the volumetric efficiency.
  • an intake assembly having all the characteristics listed at the start of the present description and further characterized in that :
  • the reference number 100 designates an intake assembly according to various embodiments of the invention. Any components that may have already been identified in the foregoing description will be designated by the same reference numbers.
  • the intake assembly 100 can be coupled to the internal-combustion engine 2 and comprises, for each cylinder CY, an intake duct 104 in fluid communication with an airbox 106 by means of a throttle body 108.
  • Each throttle body 108 comprises inside it a throttle valve 110.
  • Housed within the airbox 106 is a filter element 114, and an intake mouth 116 provided on the airbox 106 is directly in view of the aforesaid filter element 114 and is set upstream thereof and in fluid communication therewith.
  • the intake mouth 116 may possibly be provided by means of a short stretch of duct coming under the airbox 106.
  • the airbox 106 develops with a substantially L-shaped geometry that bestows on it a substantially two-volume structure. More precisely, the airbox 106 comprises:
  • the solution presented in Figures 3 , 4 is to be assumed as one of the possible examples.
  • the airbox 106 (which, as has been said, according to the present invention, has also function of box for housing the filter element), can assume various shapes according to the overall dimensions available and must be in any case characterized in that the two volumes (one upstream and one downstream of the filter element) behave fluid-dynamically as a single large volume.
  • each ensemble comprising an intake duct 104 and the respective throttle body 108 in turn defines an independent intake manifold so that, in the embodiment illustrated by way of example herein, two independent intake manifolds are present.
  • the intake ducts 104 are substantially "C"-shaped and are fixed - at a first end - to a cylinder head 200 of the internal-combustion engine 2 so as to connect up with further stretches of intake duct provided in the cylinder head of the internal-combustion engine, as is known to the person skilled in the branch.
  • the curved shape of the intake ducts 104 is such that they substantially embrace part of the cylinder head 200 of the internal-combustion engine 2.
  • a second end of each intake duct 104 is fixed to a corresponding throttle body 108, which is in turn fixed to the airbox 108 and is in fluid communication therewith.
  • Each throttle body is here configured as a stretch of cylindrical duct, set within which is the throttle valve 110 and which is designed to set up a fluid communication between the ducts 104 and the airbox 106.
  • the latter is designed to be fixed on the top of the cylinder head 200 of the internal-combustion engine 2 by means of screws entering holes 118 that traverse the airbox 106 and engaging in the cylinder head 200.
  • a flow of air is taken in through the intake mouth 116, is filtered by the filter element 114, and enters the airbox 106.
  • Arrangement of the throttle valves 110 fluid-dynamically downstream of the airbox 106 enables amplification of the effect of the pressure waves that are set up within the intake assembly 100, enhancing tuning of the ducts 104 and improving the volumetric efficiency of the internal-combustion engine.
  • the section of the intake assembly 100 within which reflection of the pressure waves takes place is the one basically comprised between the facing section between the duct 104 and the filter box 106 in the area of the throttle valve 110 and the one or more intake valves associated to each cylinder CY, downstream of the corresponding intake duct 104. It should be noted that the ends are the same also in the case of the intake assembly 1, but in the intake assembly 100 the path no longer comprises the airbox.
  • the throttle valves 110 of the throttle bodies 108 can be connected mechanically and actuated by means of a common actuator device, for example a single electric motor, in order to reduce the costs of production of the intake assembly 100.
  • the intake assembly 100 is provided with monitoring channels 120 that connect adjacent pairs of intake ducts 104.
  • monitoring channels 120 that connect adjacent pairs of intake ducts 104.
  • a single monitoring channel 120 is provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Characterised By The Charging Evacuation (AREA)
EP11186880.8A 2011-10-27 2011-10-27 Ensemble d'admission pour un moteur à combustion interne Withdrawn EP2587043A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP11186880.8A EP2587043A1 (fr) 2011-10-27 2011-10-27 Ensemble d'admission pour un moteur à combustion interne
EP12180110.4A EP2679796B1 (fr) 2011-10-27 2012-08-10 Ensemble d'admission pour un moteur à combustion interne
US13/657,405 US9845775B2 (en) 2011-10-27 2012-10-22 Intake assembly for an internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11186880.8A EP2587043A1 (fr) 2011-10-27 2011-10-27 Ensemble d'admission pour un moteur à combustion interne

Publications (1)

Publication Number Publication Date
EP2587043A1 true EP2587043A1 (fr) 2013-05-01

Family

ID=46614395

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11186880.8A Withdrawn EP2587043A1 (fr) 2011-10-27 2011-10-27 Ensemble d'admission pour un moteur à combustion interne

Country Status (1)

Country Link
EP (1) EP2587043A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015071957A (ja) * 2013-10-02 2015-04-16 株式会社デンソー スロットルバルブ装置
US9163595B2 (en) 2013-09-04 2015-10-20 Electro-Motive Diesel, Inc. Engine having an air box baffle

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5181491A (en) * 1991-03-01 1993-01-26 Honda Giken Kogyo Kabushiki Kaisha Intake system in multi-cylinder type internal combustion engine
DE29811432U1 (de) * 1998-06-26 1998-09-03 Mann & Hummel Filter Rohrsystem, insbesondere Saugrohrsystem für eine Brennkraftmaschine
US6024066A (en) * 1997-10-30 2000-02-15 Denso Corporation Air-intake module for internal combustion engine
EP1666716A2 (fr) * 2004-04-22 2006-06-07 Keihin Corporation Système d'admission pour moteur à combustion interne
EP1808595A2 (fr) * 2006-01-17 2007-07-18 Yamaha Hatsudoki Kabushiki Kaisha Système d'admission pour un moteur à combustion interne

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5181491A (en) * 1991-03-01 1993-01-26 Honda Giken Kogyo Kabushiki Kaisha Intake system in multi-cylinder type internal combustion engine
US6024066A (en) * 1997-10-30 2000-02-15 Denso Corporation Air-intake module for internal combustion engine
DE29811432U1 (de) * 1998-06-26 1998-09-03 Mann & Hummel Filter Rohrsystem, insbesondere Saugrohrsystem für eine Brennkraftmaschine
EP1666716A2 (fr) * 2004-04-22 2006-06-07 Keihin Corporation Système d'admission pour moteur à combustion interne
EP1808595A2 (fr) * 2006-01-17 2007-07-18 Yamaha Hatsudoki Kabushiki Kaisha Système d'admission pour un moteur à combustion interne

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9163595B2 (en) 2013-09-04 2015-10-20 Electro-Motive Diesel, Inc. Engine having an air box baffle
JP2015071957A (ja) * 2013-10-02 2015-04-16 株式会社デンソー スロットルバルブ装置

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