Electrically controlled valve

专利摘要:
This invention relates to electrically operable valves and in particular, but not exclusively, to valves for use in fuel injection system for internal combustion engines. A valve has a housing 13 having a valve 3 seat, and receiving a valve body 2 which can be raised from the valve seat 3 in accordance with a variation in dimension of magnetostrictional device 7 or a piezoceramic device caused by a current flow in the device. The valve body 2 is spring-loaded, by spring 15, in a sense to close the valve and is connected via the device 7 to a movable abutment unit 10,11, which is so constituted that, during the current induced variations in dimension, it acts as a stationary abutment or anchorage for that end of the device, which is remote from the valve body.
公开号:SU1132798A3
申请号:SU802953755
申请日:1980-07-30
公开日:1984-12-30
发明作者:Вильмерс Готтлиб
申请人:Ауди Нсу Ауто Унион Аг (Фирма)；
IPC主号:

专利说明:

with
YU
CO 00 The invention relates to a valve structure and can be used in fuel injection devices for internal engines. A solenoid valve is known in a casing with an inlet and outlet connections placed a regulating member connected to a rod made of piezoceramic or magnetostrictive material. However, this device is not sufficiently high. reliability due to the fact that temperature fluctuations, wear and tear affect the effective course of the regulator. An electrically controlled valve is known in which the bore of the casing with the inlet and outlet channels is installed an adjusting member, connects Hbft with a stem made of ceramic or magnetostrictive piezo loaded with a spring in the direction of the saddle, and a support is placed in the case, kinematically with an electrode with stem 21. However, the known technical solution has insufficient reliability due to the fact that the valve opening time does not correspond to the duration of the impact of which the iCAt pulse ... The aim of the invention is increase the reliability of the device. : The goal is achieved: in the electrically operated: valve, in the bore of the casing with the inlet and outlet channels the regulator is installed, connected to the rod, made of piezo electric or magnetically friction material, loaded with a spring in the direction of the saddle, and in the case there is a support, kinematically connected with the rod, in the case there is a chamber filled with liquid, and the support is made in the form of a damping piston placed in this chamber and dividing it into two cavities, and in the cavity with The regulatory body has a sealing element installed. The sealing element is made in the whole of the clamp installed on the rod along a sliding fit, spring-loaded in the direction of closure and contacting along the end with the end face of the bore cortex. FIG. 1 depicts a valve, cut; in fig. 2 — valve, embodiment in FIG. 3 - magnetostriction element, embodiment. In the housing 1 with the entrance; m 2 and the outlet 3 nozzle openings, an adjusting member, 4, is connected to the rod 5, made of piezoceramic or magnetostrictive material. An electric coil 6 is spaced on the rod. In case 1, a chamber 7 is filled, filled with liquid and placed in it movably — a support 8, made in the form of a piston loaded with a spring 9 toward the saddle 10. On the rod 5 in the cavity from the side of the regulator 4 On a sliding fit, a spring-loaded spring 11 is provided with a sealing element 12, which is in contact with the end of the valve body bore. In the housing 1 there is a topping-up, {leading channel 13, connected by a channel with the input cavity. In the valve (Fig. 3), the rod is made in the form of a magnetostriction element consisting of a bimetallic washer 14 placed in a holder 15, in which an electric coil 6 is also installed. The valve operates as follows. When voltage is applied to the coil 6, there is a sudden short-term reduction of the rod 5, while the piston 8 acts as a fixed support for the rod 5, because it does not move downwards due to its mass and the presence of liquid in the chamber 7 . Due to this, the regulator 4 rises from the seat and the working medium flows out through the opening 3. The stroke of the regulator may be limited by the stop 16 or the length of the electrical signal. If no current is applied to the coil 6, then the spring 9 presses the regulator 4 to the seat. The reduction of the rod 5 when current flows through the coil 6 is insignificant due to the fact that on one side the regulator always presses the spring against the seat regardless of the various thermal expansions of the housing, while when current is applied to the coil 6, the piston 8 serves as fixed support for the rod 5. This provides a strictly metered fuel injection 113 Due to the sealing of the chamber 7, the sealing element 12 is eliminated; double centering of the rod. In addition, the sealing element 12 when filling the chamber acts as a non-return valve. When executing the rod as a bimetallic washer (Fig. 3), when the current flows through the bobbin 6, the bimetallic washer 14 is deflected, as a result the regulator extends from the saddle. Such a design allows the valve to be more reliable by eliminating the influence of temperature fluctuations, wear and manufacturing tolerances on the flow of the regulator.
FIG.
FIG. 2

权利要求:
Claims (2)
[1]
1. ELECTRICALLY CONTROLLED VALVE, in the bore of the casing of which there is a regulating body with input channels connected to a rod made of piezoelectric or magnetostrictive material, loaded with a spring towards the seat, and. In the casing - a support kinematically connected with it, characterized in that, in order to increase reliability, a chamber filled with liquid is made in the housing, and the support is made in the form of a damping piston placed in this chamber and dividing it into two cavities, moreover, in the cavity from the side of the regulator sealing body installed sealing element.
[2]
2 "Valve according to π. '1, characterized in that the sealing element is * * <the element is made in the form of a washer mounted g on the rod along a sliding seat; ; ke, spring-loaded towards zakry- ¹ ζ ment and in contact at its end with <
end of the body boring.
"5>
1 1132798

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法律状态:

优先权:

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申请号 | 申请日 | 专利标题

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DE19792931874|DE2931874C2|1979-08-06|1979-08-06|Electrically operated valve|

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