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
  • F02M35/02—Air cleaners
  • F02M35/024—Air cleaners using filters, e.g. moistened
• • 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
  • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
  • F02B37/12—Control of the pumps
  • F02B37/16—Control of the pumps by bypassing charging air
• • 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
  • F02M35/1015—Air intakes; Induction systems characterised by the engine type
  • F02M35/10157—Supercharged engines
• • 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
  • F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
  • F02M35/10236—Overpressure or vacuum relief means; Burst protection
• • 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
  • F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
  • F02B39/16—Other safety measures for, or other control of, pumps
  • F02B2039/162—Control of pump parameters to improve safety thereof
  • F02B2039/166—Control of pump parameters to improve safety thereof the fluid pressure in the pump or exhaust drive being limited
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
  • Y02T10/00—Road transport of goods or passengers
  • Y02T10/10—Internal combustion engine [ICE] based vehicles
  • Y02T10/12—Improving ICE efficiencies

Definitions

• the invention relates to the field of air filters for vehicles having a supercharged engine provided with a discharge valve (generally designated by the English expression "dump valve"), and the field of architecture of such engines.
• the combustion engine turbochargers are equipped with a compressor discharge system, called dump valve, which protects against overpressure and the pumping phenomenon.
• dump valve a compressor discharge system
• the air intake valve, or “throttle body” closes and then generates a peak pressure in the pressure inlet line between the turbo and the throttle body.
• the discharge valve allows the overpressure to be discharged to the vacuum intake circuit (before the turbocharger compressor) and thus to avoid the phenomenon of compressor pumping, as well as any peak pressure that could damage the compressor wheel.
• a dump valve architecture integrated into the compressor is known: a channel connecting, as a bypass of the compressor, the part of the vacuum air line and the part of the pressure line allows to bypass the compressor under the action of the dump valve.
• the discharge valve or dump-valve may for example be indifferently electric or pneumatic.
• This conventional architecture causes a bulky and heavy compressor casing, because of the integration of the dump-valve.
• This architecture therefore limits the possibility of having a compact compressor, the discharge valve (for example of electrical or pneumatic technology) being relatively bulky.
• Such architecture is particularly problematic when the engine implementation constraints are important, for example in the context of an automotive application.
• Such an architecture also has a second major defect.
• the compressor In order to ensure the best possible efficiency of the discharge valve, it is necessary to position it as close as possible to the throttle body of the engine, which is the source of the overpressures in the intake line.
• the compressor is generally fluidly away from the throttle body. Indeed, it may be necessary to integrate various elements between the compressor and the throttle body, for example a exchanger called "charge air cooler", to lower the temperature of the air at the intake of the engine .
• a exchanger called "charge air cooler”
• Such an element being furthermore generally positioned on the front face of a vehicle, the ducts necessary for this arrangement may have a large length.
• the invention aims to solve these problems and aims to improve the overall compactness of combustion engines having a discharge valve, by proposing an intake line of an engine having an optimized architecture.
• the invention also relates to an air filter used in an intake line according to the invention.
• a first object of the invention therefore relates to an air intake line for combustion engine having in this order, on a main branch: ⁇ an air filter provided with a housing;
• the line further comprising a recirculation branch in branch of the main branch between the downstream and the upstream of the compressor, and a discharge valve adapted to prohibit or allow the circulation of a fluid in the recirculation branch, characterized in a first end of the recirculation branch is connected to the main branch through the air filter housing.
• the air filter comprising a filter means between an upstream chamber and a downstream chamber, according to the direction of flow of air in the main branch, the first end of the recirculation branch is connected to the downstream chamber.
• the recirculation branch is disposed between two points of the main branch in which circulates air filtered by the air filter, avoiding any risk of unfiltered air passage to the engine inlet via the branch of recirculation.
• the main branch further comprising a heat exchanger between the compressor and the air metering valve
• a second end of the recirculation branch is connected between the heat exchanger and the metering valve. This prevents the overpressure of the heat exchanger during rapid closing of the air metering valve at the inlet, before opening the discharge valve.
• the discharge valve has a valve body secured to the housing of the air filter.
• This variant of the invention allows great simplicity in the implantation of the discharge valve.
• the air filter housing is shaped so as to form the body of the discharge valve. This maximizes the mass gains that can be achieved by the implementation of the invention, and reduces the manufacturing and logistics costs involved in implementing the invention.
• the discharge valve is a solenoid valve. It is a reliable technology, successfully used in the field of discharge valves.
• the discharge valve may comprise a pneumatic actuator.
• a second object of the invention relates to an air filter housing for filtering the air at the intake of a combustion engine, characterized in that it is shaped so as to constitute the body of the discharge valve.
• Such an air filter housing is the main element allowing the implementation of an intake line according to the first subject of the invention.
• the housing is shaped by molding or overmoulding so as to form the body of a discharge valve.
• the invention also relates to an assembly comprising a casing according to the second object of the invention, and a discharge valve whose body is constituted by said casing.
• the invention relates to a motor vehicle having a combustion engine comprising an intake line according to the first object of the invention.
• Figure 1 schematically shows a combustion engine, as installed in a motor vehicle, and having an air intake line according to a variant of the invention.
• Figures 2a and 2b show schematically an assembly comprising an air filter and a discharge valve, brought into play in a first preferred embodiment of an air intake line according to the invention.
• Figure 2a shows the discharge valve in the closed position
• Figure 2b shows the discharge valve in the open position.
• Figures 3a and 3b show schematically an assembly comprising an air filter and a discharge valve, brought into play in a second preferred embodiment of an air intake line according to the invention.
• Figure 3a shows the discharge valve in the closed position
• Figure 3b shows the discharge valve in the open position.
• FIG. 1 schematically shows a combustion engine M, as implanted in a motor vehicle V and having an air intake line according to a variant of the invention.
• An air intake line according to the invention comprises a main branch, comprising itself and in this order according to the direction of flow of the air in the line:
• the line comprises a recirculation branch 4 disposed in branch of the main branch, between the downstream and the upstream of the compressor 2, the concepts of upstream and downstream meaning, as in the remainder of this document, according to the direction of flow of air in the main branch of the air intake line during normal operation of the combustion engine M that the line is intended to supply air.
• a discharge valve 5 allows to prohibit or allow the circulation of a fluid in the recirculation branch.
• the discharge valve or "dump valve” makes it possible, in a well known manner, to discharge a too high overpressure which can be created downstream of the compressor 2, in particular during a sudden closing of the metering valve 3, towards a point of the intake line upstream of the turbocharger.
• the circuit further comprises a heat exchanger 6, in this case a charge air cooler, disposed on the main branch between the compressor 2 and the metering valve 3 of the air on admission.
• the recirculation branch has the particularity of having one end, said first end 41, connected to the main branch of the intake line through the housing of the air filter.
• the recirculation branch is in communication with the interior volume of the air filter.
• the second end 42 of the recirculation branch is connected to the main branch between the heat exchanger 6 and the metering valve 3.
• This arrangement allows in particular to avoid the setting overpressure of the heat exchanger 6 when the rapid closure of the metering valve 3 (in particular during a sudden release of the accelerator control of the motor M) causes the opening of the discharge valve 5.
• the tapping of the second end 42 of the recirculation branch on the main branch is preferably positioned closer to the metering valve 3 (but obviously upstream thereof), in order to limit the length of the main branch of the intake line put under overpressure before opening the discharge valve 5.
• FIGS. 2a and 2b schematically show an assembly comprising an air filter 1 and a discharge valve 5, set n game in a first variant preferential of an air intake line according to the invention.
• Figure 2a shows the discharge valve 5 in the closed position
• Figure 2b shows the discharge valve 5 in the open position.
• the discharge valve 5 is a solenoid valve secured to the housing 1 1 of the air filter 1. More specifically, the discharge valve 5 comprises a valve body 51 and a valve 52, movable in the valve body 51 under the effect of a solenoid 53.
• the valve body 51 may in particular be molded with (or overmolded on) the housing 1 1 of the air filter 1.
• the housing 1 1 is thus shaped to form the body 51 of the discharge valve. More simply, the discharge valve 5 (including the valve body 51) can be reported and fixed to the housing 1 1 of the air filter 1.
• valve Whether the valve is reported or that its body 51 is integrally formed with the housing 1 1, it can be advantageously positioned on the cover of the air filter (which is an element of the housing 1 1). Compared to a conventional cover, the cover can be advantageously reinforced at the connection with the recirculation branch 4.
• Figures 3a and 3b show schematically an assembly comprising an air filter and a discharge valve, brought into play in a second preferred embodiment of an air intake line according to the invention.
• Figure 3a shows the discharge valve in the closed position
• Figure 3b shows the discharge valve in the open position.
• the discharge valve 5 is not integral with the housing 1 1 of the air filter 1, but is positioned at another point of the recirculation branch 4.
• the simplification of the intake line is smaller, but this variant offers greater freedom in the positioning of the discharge valve January 1, which can allow the use of any volume along the recirculation leg 4 to position the discharge valve 5.
• the air filter 1 comprises a filtration means 12 between a upstream chamber 13 and a downstream chamber 14 of the air filter.
• the upstream chamber 13 corresponds to the internal volume of the air filter housing on the "dirty" air side (before filtration)
• the downstream chamber 14 corresponds to the internal volume of the clean air-side air filter housing (after filtration).
• the invention thus proposes a device offering multiple advantages. It is thus possible to optimize the architecture of the intake line of an engine.
• the adoption of a turbocharger whose compressor has no valve and integrated discharge conduit reduces the volume and implementation constraints, allowing a general optimization of the intake line.
• the implementation of the invention is however easy, especially since it retains the conventional operation of the discharge valve, which can impose a standard control (in the case of course where the discharge valve is a pilot valve).
• the dump valve By positioning the dump valve closer to the throttle body, it ensures a quick response and avoids the pressurization of a large part of the air intake line (including the air cooler of supercharging if the engine is equipped with it)
• an intake line according to the invention.
• a saving in mass in particular because the valve can be located in a less constrained environment, in particular thermally.
• the use of the invention can also optimize the distribution of masses in the under-hood space of the engine, for example by relating the discharge valve behind the front end of the vehicle.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Supercharger (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=45607769

Family Applications (1)

Country Status (4)

Families Citing this family (1)

Family Cites Families (6)

• 2011
  • 2011-01-17 FR FR1150341A patent/FR2970523B1/fr active Active
  • 2011-12-19 WO PCT/FR2011/053060 patent/WO2012098307A1/fr active Application Filing
  • 2011-12-19 CN CN201180065189.7A patent/CN103782019B/zh not_active Expired - Fee Related
  • 2011-12-19 EP EP11818920.8A patent/EP2665915A1/de not_active Withdrawn

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events