Fuel injection device for internal combustion engines

Details Fuel injection device for internal combustion engines Fuel injection device for internal combustion engines

F - Mech Eng,Light,Heat,Weapons

02

M

F02M 51/04 (2006.01) F02M 63/06 (2006.01)

Patent

CA 2218695

A fuel injection device works based on the principle of storage of energy in a solid body and is designed as a reciprocating piston pump with a feeding piston (35, 24) that stores kinetic energy during an almost resistance-free acceleration phase. The stored kinetic energy is abruptly transmitted to the fuel contained in a compression chamber (66), generating a pressure wave for injecting fuel through an injection nozzle. The means that interrupt the resistance-free acceleration phase are designed as a valve with a valve body (50a) and a valve seat (57) shaped on the feeding piston (35, 24). To generate the pressure wave, the valve closes the compression chamber (66) so that the kinetic energy of the feeding piston (35, 24) is transmitted to the fuel enclosed in the compression chamber (66). The valve seat (57) and the valve body (50a) lie at the front end of the feeding piston (35, 24), seen in the direction of injection, and separate the compression chamber (66) from the feeding piston (35, 24).

Ce système d'injection de carburant fonctionne selon le principe d'accumulation d'énergie par un corps solide et est constitué d'une pompe à piston alternatif avec un piston de refoulement (35, 24) qui accumule de l'énergie cinétique pendant une phase d'accélération presque sans résistance. L'énergie cinétique ainsi accumulée est transmise brusquement au carburant contenu dans une chambre de compression (66), générant une onde de choc qui sert à injecter le carburant à travers un injecteur. L'élément qui interrompt la phase d'accélération sans résistance est une soupape avec un corps de soupape (50a) et un siège de soupape (57) façonné sur le piston alternatif (35, 24). La soupape ferme la chambre de compression (66) afin de générer l'onde de choc et de transmettre l'énergie cinétique du piston alternatif (35, 24) au carburant renfermé dans la chambre de compression (66). Le siège de soupape (57) et le corps de soupape (50a) se situent à l'extrémité antérieure du piston alternatif (35, 24), vus dans le sens d'injection, séparant la chambre de compression (66) du piston alternatif (35, 24).

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