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
  • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
  • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
  • F02M55/025—Common rails
• • 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
  • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
  • F02M2200/85—Mounting of fuel injection apparatus
  • F02M2200/855—Mounting of fuel injection apparatus using clamp elements or fastening means, e.g. bolts or screws

Definitions

• the present invention relates to a fuel distributor for a fuel charge assembly according to the preamble of Claim 1 .
• a fuel distributor for a fuel charge assembly with fuel injectors, in particular for common rail systems, is known in the art.
• the fuel distributor is a component of a fuel charge assembly and provides to feed fuel to fuel injectors of an internal combustion engine.
• Each of the fuel injectors are connected to the fuel distributor via each of the injector cups formed on the fuel distributor.
• the fuel distributor has a connection bore for allowing fluid flow coming from a fuel chamber of the fuel distributor to an inner volume of an injector cup.
• the connection bore extending from an outer wall of the fuel distributor toward the fuel chamber is created by a drilling process and is sealed with a closure (i.e., plug). It is important that the location of the injector cup of the fuel injector must be suitable for receiving the corresponding fuel injector of the internal combustion engine.
• connection bore is provided by a simple drilling process and a fluid connection is provided there between. And then corresponding plugs should be used to seal off the created holes on an outer wall of the fuel distributor.
• CN212406922 U
• the main body has a hole created on the main body and is sealed off by a plug placed within the created hole.
• W02012150074 A prior art publication in the technical field of the invention may be referred to as W02012150074 (A1) document.
• the document discloses a fuel distributor which serves in particular for fuel injection systems of mixture-compressing, applied-ignition internal combustion engines comprises a housing in which a fuel chamber is formed.
• at least one cup is provided which is arranged eccentrically with respect to the fuel chamber.
• the cup is connected at least via a duct portion of a duct to the fuel chamber.
• the duct portion is sealed off with respect to the environment by a closure provided on the duct.
• An object of the invention is to provide a reliable plug closure system for sealing an inlet of a connection bore of the fuel distributor in a practical manner during manufacturing of the fuel distributor.
• the present invention proposes a fuel distributor for a fuel charge assembly, the fuel distributor comprising: a main body having a fuel chamber formed along a longitudinal axis of the fuel distributor; at least one cup having an injector chamber extending along a first axis wherein each cup is arranged eccentrically with respect to the fuel chamber; at least one connection bore having an inlet which is connecting an auxiliary hole of the injector chamber of the cup to the fuel chamber.
• the fuel distributor comprises a plug closure system having a plug with an O-ring on the plug inserted into the inlet of the connection bore and a pin on an end of the inlet inserted into through holes of the fuel distributor, to close and seal off the inlet of the connection bore.
• the through holes are formed on an axis parallel to the longitudinal axis and the pin inserted into the through holes forms a rest to the plug to prevent the plug exit from the end of the inlet towards outside.
• the fuel pressure inside the fuel chamber of the fuel distributor also, provides to keep the position of the plug closure system in the inlet by pushing the plug towards the inlet.
• the O-ring of the plug closure system provides to keep and fix the position of the plug.
• the plug of the plug closure system is arranged as insertable and press-fitted into the inlet of the connection bore where the inlet is formed from an outer wall of the main body towards inside the main body.
• the plug has a circular cross- sectional view corresponding to a circular cross-sectional view of the inlet of the fuel distributor.
• the plug is fitted into the inlet.
• the plug has a groove to fix the O-ring on the plug.
• the O-ring is fixed on the plug.
• the O-ring is made of a plastic material.
• a resiliently entrance of the plug can be realized towards inside the inlet by means of the O-ring.
• the sealing in the inlet is provided in a reliable.
• the fuel distributor is formed via forging.
• the design elements are such as a main body, at least one injector cup, mounting brackets, fuel inlet fitting and sensor fitting.
• the inlet and the connection bore have the same diameters.
• same driller can be used in one drilling process.
• the first axis of the auxiliary hole is arranged to extend perpendicularly according to the longitudinal axis of fuel chamber.
• the positions of the cups are arranged on the fuel distributor.
• a position of the plug closure system is arranged between the end of the inlet of the connection bore and the auxiliary hole of the cup.
• Figure-1 illustrates a two-dimensional view of a fuel distributor according to the present invention.
• Figure-2 illustrates a cross-sectional view (A-A) of the fuel distributor taken from figure- 1.
• Figure-3 illustrates a perspective view of a fuel distributor according to the present invention.
• Figure-4 illustrates a two-dimensional view of a fuel distributor with plug closure system, according to the present invention.
• Figure-5 illustrates a cross-sectional view (B-B) of the fuel distributor taken from figure- 4.
• Figure-6 illustrates a perspective view of a fuel distributor with plug closure system according to the present invention.
• Figure-7 illustrates a perspective view of a pin of the plug closure system.
• Figure-8 illustrates a perspective view of the plug closure system to be used in the fuel distributor according to the present invention.
• Figure-9 illustrates a two-dimensional view of the plug closure system to be used in the fuel distributor.
• Figure-10 illustrates a cross-sectional view (A-A) of the plug closure system taken from figure-9.
• the present invention proposes a fuel distributor (10) for a fuel charge assembly having fuel injectors, in particular for common rail systems.
• the fuel distributor (10) is produced by a forging method. All design elements of the fuel distributor (10) such as a main body (11), at least one injector cup (30), mounting brackets, fuel inlet fitting and sensor fitting (13) are formed uniform on the fuel distributor (10) during forging process. This is the advantage of forging process in the fuel charge assembly production over brazing method. But this advantage brings difficulties for connection bore (14) creation.
• the connection bore (14) should be closed from an inlet (15) side on a wall thickness of the main body (11).
• brazing method the design elements are manufactured separately, and they are brought together by brazing process, in the prior art. But in the forging method, a pre material is performed by hot pressing of material between two dies. Then, the fuel distributor (10) and all design elements of the fuel distributor (10) which are roughly formed, are extracted from dies. Lastly, machining and drilling processes are realized for the last shape of the elements.
• the fuel distributor (10) feeds fuel to fuel injectors (not shown in the figures).
• a fuel charge assembly comprises a number of fuel injectors and the fuel distributor (10).
• the proposed fuel distributor (10) comprises a main body (11) having a fuel chamber (12) formed along a longitudinal axis (X) of the fuel distributor (10); at least one cup (30) having an injector chamber (31) extending along a first axis (F) wherein each cup (30) is arranged eccentrically with respect to the fuel chamber (12); at least one connection bore (14) having an inlet (15) which is connecting an auxiliary hole (32) of the injector chamber (31) of the cup (30) to the fuel chamber (12).
• the present invention advantageously further comprises a plug closure system (20) having a plug (22) with an O-ring (24) on the plug (22) inserted into the inlet (15) of the connection bore (14) and a pin (21) inserted into a through hole (17) of the fuel distributor (10), to close and seal off the inlet (15) of the connection bore (14).
• the plug (22) is in a cylindrical shape which corresponds to a cylindrical inner volume of the inlet (15) of the connection bore (14) as in the figures; 8, 9 and 10.
• the plug (22) has a groove (23) to insert an O-ring (24).
• the pin (21) can be insertable and fixed in the through hole (17) as can be seen from the figures; 4, 5, 6 and 7.
• the through holes (17) are formed on an axis parallel to the longitudinal axis (X) and the pin (21) is inserted into the through holes (17) forms a rest to the plug (22) to prevent the plug (22) exit from the inlet (15).
• the main body (11) of the fuel distributor (10) is formed via forging method and like a tubular body. All the injector cups (30) are formed eccentrically according to a longitudinal axis (X) of the main body (11). Auxiliary hole (32) is adjusted and drilled in a closer distance to the fuel chamber (12) of the fuel distributor (10). Therefore, the auxiliary hole (32) is formed on a first axis (F) parallel to a center axis of the injector chamber (31). And the plug closure system (20) is disposed between the auxiliary hole (32) and the inlet (15) of the connection bore (14).
• a driller can be used to create the inlet (15) and the connection bore (14) at the same time to reach the fuel chamber (12). Accordingly, the inlet (15) and the connection bore (14) have the same diameters, since the same driller is used and the holes are formed together.
• connection bores (14) are the same as with numbers of the cups (30).
• Each cup (30) is provided with the corresponding connection bores (14).
• each connection bores (14) have an inlet (15) formed on an outer wall of the main body (11).
• An end (16) is an open hole of the inlet (15) of the connection bore (14) which is opening through outside of the fuel distributor (10).
• the fuel distributor (10) has three perpendicularly oriented cups (30) with respect to the longitudinal axis (X) of the fuel distributor (10). Accordingly, three separate plug closure system (20) can be used to seal off the inlet (15) of the connection bore (14).
• the plug (22) of the plug closure system (20) is arranged as insertable and press-fitted into the inlet (15) of the connection bore (14).

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Fuel-Injection Apparatus (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=93843181

Family Applications (1)

Country Status (1)

• 2023
  • 2023-02-23 EP EP23707700.3A patent/EP4486989A1/de active Pending

Similar Documents

Legal Events