EP3997325A1 - Procédé de nettoyage d'un répartiteur d'air - Google Patents
Procédé de nettoyage d'un répartiteur d'airInfo
- Publication number
- EP3997325A1 EP3997325A1 EP20750331.9A EP20750331A EP3997325A1 EP 3997325 A1 EP3997325 A1 EP 3997325A1 EP 20750331 A EP20750331 A EP 20750331A EP 3997325 A1 EP3997325 A1 EP 3997325A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fluid
- air
- opening
- air distributor
- distributor
- 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- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
-
- 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
- F02M35/1034—Manufacturing and assembling intake systems
- F02M35/10354—Joining multiple sections together
- F02M35/1036—Joining multiple sections together by welding, bonding or the like
Definitions
- the present invention relates to a method for cleaning an air distributor and to a cleaning installation intended for implementing this method.
- an air distributor also called an intake manifold, comprises an air inlet and several air outlets intended to be connected to a cylinder head of an engine in order to supply each cylinder of the engine with the air necessary for fuel combustion.
- the constituent parts intended to be assembled together to form the distributor may be subjected to various particulate pollution during their handling by the operator or due to the presence of dust particles or of sand in the immediate vicinity of the assembly machine.
- the assembly processes implemented at this level can also generate particulate pollution.
- plastic particles to be torn off during the friction of the welded parts. together. These torn off plastic particles are then deposited inside the distributor and significantly alter the level of cleanliness of said distributor.
- a first solution consists for example in mechanically cleaning, using a brush type tool, the visible surfaces of the distributor.
- a second solution consists in carrying out a leaching of the distributor.
- Such a cleaning method is based on the use of detergent chemical compositions (detergent compositions) strong enough to remove the particles deposited on the walls of the distributor. These detergent compositions are introduced into the air distributor during the cleaning process.
- This solution presents several problems.
- One of the problems is the fact, once the detergent product has been introduced into the distributor, it is necessary evacuate it by a drying process and ensure that no trace of this detergent product is still present in the distributor after the drying operation. Cycle time and the cost associated with this process are also recurring issues.
- Another problem is the negative impact on the environment of such a solution due to the use of chemicals which are vented outside the vehicle via the exhaust gases.
- the present invention therefore aims to provide a cleaning process that does not have the drawbacks of the aforementioned existing solutions, and, in particular, a cleaning process that is both simple to implement, inexpensive, non-corrosive, non-polluting, and achieving a high level of cleanliness.
- the invention relates to a method for cleaning an air distributor, said air distributor comprising several air outlets intended to be connected to a cylinder head of an internal combustion engine, said method comprising the steps of:
- the method of the invention will make it possible to create a shock wave inside the air distributor, this shock wave being capable of taking off the particles deposited inside the air distributor. These particles are then discharged with the fluid during the final step of the process.
- the method of the invention may include one or more of the following characteristics, taken individually or in combination:
- the pressure in the fluid reservoir is greater than or equal to 5 bars, and preferably is equal to 5 bars.
- the volume of the fluid reservoir is between 10 liters and 20 liters, and preferably is equal to 16 liters.
- the fluid contained in the fluid reservoir is air.
- the opening time of the valves is less than 10 msec and the flow rate of fluid generated during this opening is greater than 9 m 3 / sec, and preferably equal to 9.6 m 3 / sec .
- step c) is repeated between two and ten times after a pause time of 2.5 sec before performing step d), and, preferably, is repeated twice after a pause time of 2.5 sec before d 'perform step d).
- the present invention also relates to a cleaning installation intended for implementing the method as defined above, comprising:
- a rapid opening valve arranged in each of the fluid inlet conduits, said valve making it possible to control the flow rate of fluid entering the air distributor at the air outlets as a function of its opening;
- a pressure detector capable of detecting the pressure of the fluid downstream of the quick opening valves
- control device able to receive the signal detected by the pressure detector and to control the opening of each of the valves as a function of said signal so as to create a shock wave inside the air distributor.
- the pressure in the fluid reservoir may be greater than or equal to 5 bars, and preferably be equal to 5 bars.
- the volume of the fluid reservoir may be between 10 liters and 20 liters, and preferably be equal to 16 liters.
- the quick-opening valves can open in less than 10 msec and generate a fluid flow rate greater than 9 m 3 / sec when they are opened.
- FIG. 1 is a bottom perspective view of a conventional air distributor.
- FIG. 2 is a schematic view of a cleaning installation for implementing the method of the invention.
- FIG. 3 is a diagram showing the evolution over time of the pressure of the fluid downstream of the quick-opening valves of the installation of Figure 1.
- an air distributor 20 of conventional type comprises in particular an air inlet duct 23 and several air outlet ducts 22, each of the ducts 22 being intended to be connected to a corresponding air inlet duct of the cylinder head of the engine.
- FIG. 2 there is shown a cleaning installation 10 according to the invention.
- This installation 10 comprises in particular a first air reservoir 11, with a volume of 100 l, said first reservoir 11 being connected, by means of a first air inlet pipe 12, to a second air reservoir. 13, with a volume of 16 I.
- a pressure regulator 15 disposed in the first pipe 12 makes it possible to regulate the air pressure in the second reservoir 13 so that this pressure is substantially equal to 5 bars.
- the second air reservoir 13 is connected by means of a plurality of second air inlet pipes 14 to an interface 21 of an air distributor 20 towards which the air outlet conduits 22 of the distributor open. 20.
- each of the second conduits 14 are arranged quick-opening solenoid valves 16, the opening of the solenoid valves 16 being controlled by a control unit 17 electronically connected to the solenoid valves 16.
- the control unit 17 is also electronically connected to a detector. pressure 18 positioned so as to detect the air pressure inside the interface 21.
- air outlet pipes 19 opening into the second pipes 14 , downstream of the solenoid valves 16, can be opened or closed by means of opening / closing valves 19 'so as to allow, respectively to prevent, the escape of the air contained in the air distributor 2 0.
- valves 19 ' can be opened at the end of the cleaning process so as to expel the air polluted by the particles initially covering the internal walls of the air distributor 20 and which have been removed from said walls during of the cleaning process implemented by the installation 10.
- the pipes 19 and the valves 19 ′ may be absent.
- the expulsion of the air polluted by the particles will take place through the orifices left open of the air distributor 20, in particular through the air inlet duct 23.
- This cleaning process is based on the principle of a very rapid opening of the solenoid valves 16 which will generate a shock wave inside the air distributor 20. As shown in FIG.
- this very rapid opening will advantageously be carried out by less than 10 msec and will generate a pressure wave of approximately 3 bars.
- This pressure pulse may be repeated several times within a certain period of time, and in particular twice during a cleaning cycle lasting 2.5 sec.
- the air flow generated during this opening may be greater than 9 m 3 / sec, and preferably equal to 9.6 m 3 / sec.
- Table 1 below provides the comparative results of two examples of air distributors subjected to cleanliness tests carried out in accordance with the ISO 16232 standard. These results show the quantities of particles measured in the distributor as well as the distribution of these. particles in terms of particle size gradient, in micrometers (mih).
- the air distributor of Example 1 corresponds to a first air distributor which has not been subjected to the cleaning process of the invention.
- the air distributor of Example 2 is identical to that of Example 1, except that it was subjected to the cleaning process of the invention.
- Example 2 has a level of cleanliness very clearly higher than that of Example 1.
- the air distributor of Example 2 has a particle rate less than more than half of the particle rate measured for the distributor d Air of Example 1. It is also noted that the air distributor of Example 2 has virtually no particles having a size greater than 500 miti.
- the level of cleanliness achieved by virtue of the method of the invention thus makes it possible to envisage using the air distributor of Example 2 within a motor vehicle without it being necessary to subject said air distributor to additional cleaning operations.
- the cleaning method of the present invention can be applied to any air distributor having several air outlets. It can also be applied to any part of a motor vehicle engine through which a fluid flow passes, in particular the turbo inlet fittings, the turbo outlet fittings or the water outlet housings.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Cleaning In General (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1907870A FR3098553B1 (fr) | 2019-07-12 | 2019-07-12 | Procédé de nettoyage d’un répartiteur d’air |
| PCT/FR2020/051217 WO2021009442A1 (fr) | 2019-07-12 | 2020-07-08 | Procédé de nettoyage d'un répartiteur d'air |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3997325A1 true EP3997325A1 (fr) | 2022-05-18 |
Family
ID=67875757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20750331.9A Withdrawn EP3997325A1 (fr) | 2019-07-12 | 2020-07-08 | Procédé de nettoyage d'un répartiteur d'air |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3997325A1 (fr) |
| FR (1) | FR3098553B1 (fr) |
| WO (1) | WO2021009442A1 (fr) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6564814B2 (en) * | 1997-05-23 | 2003-05-20 | Shelba F. Bowsman | Engine decarbonizing system |
| SG10201504766RA (en) * | 2015-06-17 | 2017-01-27 | Gracos Lubricants Asia Pacific Pte Ltd | A decarbonization system |
-
2019
- 2019-07-12 FR FR1907870A patent/FR3098553B1/fr active Active
-
2020
- 2020-07-08 EP EP20750331.9A patent/EP3997325A1/fr not_active Withdrawn
- 2020-07-08 WO PCT/FR2020/051217 patent/WO2021009442A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| FR3098553B1 (fr) | 2021-06-25 |
| WO2021009442A1 (fr) | 2021-01-21 |
| FR3098553A1 (fr) | 2021-01-15 |
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