초록 ▼

A fuel injection arrangement for air-compressing, spontaneous-ignition, internal combustion engines. The arrangement includes at least one electromagnetic control valve via which a high-pressure channel of a fuel injection pump can be connected with a low-pressure channel. The control valve includes

A fuel injection arrangement for air-compressing, spontaneous-ignition, internal combustion engines. The arrangement includes at least one electromagnetic control valve via which a high-pressure channel of a fuel injection pump can be connected with a low-pressure channel. The control valve includes a valve body which is in the form of a piston valve, is spring-loaded, and is axially movable in a housing chamber which is provided with at least one connection on the high-pressure end, and with a connection on the low-pressure end. The piston valve is in operative connection with an electromagnetic adjusting device which can preferably be controlled by an electrically-operating data processor. The piston valve region on the high-pressure end is delimited by a valve seat and has a fixed diameter which corresponds to the diameter of the valve seat. The piston valve region on the low-pressure end has a diameter which is less than that of the piston valve region on the high-pressure end. The housing chamber taken in its entirety is sealed off in such a way as to be resistant to high pressure. The chambers on the low and high pressure ends can be connected by at least one line. The inventive fuel injection arrangement is characterized by an extremely stable behavior of the control valve and an absolute sealing in the closure position of the piston valve, so that the fuel injection arrangement itself is operational at the highest injection pressures.

대표청구항 ▼

A fuel injection arrangement for an air-compressing, spontaneous ignition, internal combustion engine; said arrangement includes at least one electromagnetic control valve, via which a high-pressure channel associated with a fuel injection pump, which is provided with an intake line, can be connecte

A fuel injection arrangement for an air-compressing, spontaneous ignition, internal combustion engine; said arrangement includes at least one electromagnetic control valve, via which a high-pressure channel associated with a fuel injection pump, which is provided with an intake line, can be connected with a low-pressure channel; said control valve includes a valve body which is in the form of a piston valve and is spring-loaded; said piston valve has a high-pressure end and a low-pressure end, and two end faces; said piston valve is axially movable in a first chamber which includes at least one high-pressure connection associated with said high-pressure channel and said high-pressure end of said piston valve, and at least one low-pressure connection associated with said low-pressure channel and said low-pressure end of said piston valve; said piston valve is in operative connection with an electromagnetic adjusting device; the improvement comprises the provisioning of said piston valve with a valve seat for delimiting that piston valve region on said high-pressure end of said piston valve; said last-mentioned region has a fixed diameter which corresponds to the diameter of said valve seat, and that piston valve region on said low-pressure end of said piston valve has a diameter which is less than said fixed diameter; said first chamber including a second chamber, which is associated with said high-pressure end of said piston valve and one of said end faces thereof, and a third chamber, which is associated with said low-pressure end of said piston valve and the other one of said end faces thereof; at least one line for connecting said high-pressure second chamber and said low-pressure third chamber; that piston valve region on said low-pressure end of said piston valve being provided with a fourth chamber which begins at said valve seat, and cooperates with said low-pressure connection of said first chamber.