Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1991-11-08
1992-12-22
Miller, Carl S.
Internal-combustion engines
Charge forming device
Fuel injection system
123468, 123456, F02M 5500
Patent
active
051726718
DESCRIPTION:
BRIEF SUMMARY
PRIOR ART
The invention is directed to a fuel distributor for fuel injection systems of internal combustion engines defined hereinafter.
Such a fuel distributor is known from DE 37 30 571 A1 or from DE 32 28 508 A1. In both fuel distributors, fixing to the internal combustion engine is effected via webs or flanges arranged on the distributor housing which have through holes through each of which a bolt is passed and screwed up on the internal combustion engine.
In such fuel distributors, the working noises of the fuel injection valves and the pressure pulsations which are caused by the clocking of the fuel injection valves are transmitted to the adjoining components, such as the intake manifold of the internal combustion engine, and lead to unpleasant noise generation in the engine compartment of the motor vehicle.
For noise reduction in a known, so-called top-feed fuel injection valve (DE 28 27 850 A1), which is inserted directly into a connecting branch on the intake manifold and is grasped by a holder firmly clamped to the intake manifold, a resilient ring is provided which is placed with nonpositive engagement around the fuel injection valve and on which the holder engages.
ADVANTAGES OF THE INVENTION
The fuel distributor according to the invention has the advantage that, even in the design with a distributor housing which accommodates fuel-flooded location holes, in a number of fuel injection valves corresponding to the number of cylinders of the internal combustion engine, it is largely acoustically decoupled from the adjoining components. Extensive reduction of noise in the engine compartment of the vehicle is thereby achieved, even when a fuel distributor of the type described at the outset is used.
Advantageous further developments and improvements of the fuel distributor indicated are possible by virtue of the measures presented herein.
In an advantageous embodiment of the invention each rubber-metal element is realized by a resilient sleeve, e.g. made of elastomer, and a clamping element which can be anchored on the intake manifold. The resilient sleeve is inserted into mutually aligned through holes in the distributor housing and hold-down clamping elements that pass through the sleeve, pressing the sleeve radially against the hole walls, and overlaps the sleeve with a clamping shoulder, the diameter of which is not larger than the outside diameter of the sleeve.
According to a further embodiment of the invention, the clamping element comprises a clamping bolt and a metallic distance sleeve surrounding the bolt barrel. At its end faces, the distance sleeve rests against the bolt head and against the fixing flange of the intake manifold, enabling the fuel distributor to be fixed to the fixing flange of the intake manifold with a defined tightening torque. The of the bolt head is slightly smaller than the of the resilient sleeve surrounding the distance sleeve, the rubber-metal character thus being retained.
If the hold-down simultaneously forms the multiple connector for the electrical contacting of the electromagnetically actuated fuel injection valves, then, according to a further embodiment of the invention, the connecting cables leading to the socket contacts in the multiple connector are fixed in the cable ducts provided in the hold-down, e.g. by mechanical fixing elements or by compound-filling or filling with foamed material. Free conductor cross-sections capable of vibration are thereby avoided and, here too, noise generation is prevented.
Distributor housing and hold-down expediently consist of plastic but can also be manufactured from metal.
DRAWING
The invention is explained in greater detail in the description which follows with reference to an illustrative embodiment represented in the drawing. The drawing shows a partial cross-section of a fuel distributor for a fuel injection system of an internal combustion engine.
DESCRIPTION OF THE ILLUSTRATIVE EMBODIMENT
The fuel distributor represented in cross-section in the drawing has a distributor housing 10 formed of plastic, w
REFERENCES:
patent: 4327690 (1982-05-01), Sauer et al.
patent: 4519371 (1985-05-01), Nagase et al.
patent: 4751905 (1988-06-01), Bonfiglioli et al.
patent: 4768487 (1988-09-01), Yamamoto et al.
patent: 4799470 (1989-01-01), Honda et al.
patent: 4844036 (1989-07-01), Bassler et al.
patent: 4996961 (1991-03-01), Usui
patent: 5044338 (1991-09-01), Shelton
patent: 5072710 (1991-12-01), Washizu
patent: 5090385 (1992-02-01), Usui et al.
patent: 5094211 (1992-03-01), Mahnke et al.
Bassler Helmut
Ehrentraut Heinz
Peters Klaus-Jurgen
Greigg Edwin E.
Greigg Ronald E.
Miller Carl S.
Moulis Thomas N.
Robert & Bosch GmbH
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