CN2344622Y - Oil cut-off electromagnetic valve for diesel engine - Google Patents

Abstract

The utility model relates to an oil cut-off electromagnetic valve for diesel engine. A winding coil (6) is arranged in a rear case (9), a piston (4) which is made of permeability magnetic material is arranged in the core of a coil (6), a shore (1) which extends into the inner cavity of a front case (2) and is made up of non permeability magnetic material is connected with the head part of the piston (4), the shore (1) extends outward the front case supported by a reset spring (3) under the natural state, while when the piston (4) is attracted by the coil (6), the shore (1) is withdrawn in the front case (2). When the utility model is used, only a protective cover on the tail part of an adjusting rack (13) on a petroleum pump (15) needs to be screwed down, then the utility model can be turned on, and the installation is convenient and quick.

Description

Oil cut-off solenoid valve for diesel engine

The utility model relates to a kind of motorized vehicles and vessels and the engineering machinery flame-out solenoid valve of diesel engine oil-break.

Current also have many motorized vehicles and vessels such as tractor to adopt diesel engine as power source, but because diesel engine adopts the ignition by compression mode, diesel engine is flame-out not only will turn off electric switch so make, also must cut off oil pump feed, traditional mode has steel wire plug-type, pressurized air controlling type and solenoid valve push button, all need additionally to do the flame-out action of pull bar oil-break, particularly use the most general plug-type needs of steel wire always with pulling until engine misses, it is very inconvenient to operate, and can not only need the switch electric switch just can light a fire automatically as petrol engine, flame-out.The Synchro-Start Products company of the U.S. designs and has produced a kind of Fuel Cut Solenoid Valve of two coil configuration for this reason, the piston that it includes a heavy current hauling-eye and a light current hold-in winding and is subjected to this two coil control, the time relay on the diesel engine is connected on the hauling-eye loop, the switch of diesel engine is then as the main switch of described hauling-eye and hold-in winding, when the diesel engine electric switch is opened, hauling-eye and hold-in winding are switched on simultaneously, hauling-eye produces maximum magnetic force inspiration piston under the heavy current state, unclamp the oil-break pull bar, open oil circuit, hold-in winding continues to keep piston to be in fallback state under the light current effect, make oil circuit keep unimpeded, hauling-eye outage automatically under time relay control simultaneously, and when electric switch cuts out, hold-in winding also cuts off the power supply, piston just protracts under its action of reset spring, pulling oil-break pull bar, close oil circuit; This Fuel Cut Solenoid Valve has changed traditional oil-break control mode fully, it is the good product that updates, but it still exists defective: must finally connect the original oil-break pull bar of diesel engine in as installed, thereby connect transmission part such as connecting rod etc. by extra, both needed during installation to guarantee that connecting rod had certain axial precision, need certain extra installing space again, implement to have brought inconvenience for concrete the installation.

For this reason, the utility model is conceived to the high pressure oil pump of diesel engine, controls what of fuel feeding by a stroke of regulating tooth bar in oil pump, only needs to be pushed into the oil-break position to this tooth bar and can make the diesel engine oil-break flame-out.

The purpose of this utility model just is to regulate for the fuel feeding that a kind of direct control diesel engine high pressure oil pump is provided at above-mentioned prior art present situation the Fuel Cut Solenoid Valve of tooth bar.

Design proposal of the present utility model is: oil cut-off solenoid valve for diesel engine comprises by front case, the housing that rear case and rear end cover constitute, in rear case, be provided with the coil winding that comprises heavy current hauling-eye and light current hold-in winding parallel with one another, one piston of being made by permeability magnetic material is positioned at coil core, it is characterized in that described piston crown is connected with stretches into the front case inner chamber, the fore-set of making by non-magnet material, under nature, described fore-set stretches out outside the front case under the support of Returnning spring, and when piston was held by coil, described fore-set contracted in front case.

Existing diesel engine oil pump roughly has two classes, and a class is not have the smog limiter, and the stroke of regulating tooth bar is built among the oil pump case; The another kind of smog limiter that has, the stroke of tooth bar one end protrudes in outside the oil pump case, and we also have special design proposal and apply for a patent separately at this class, and the utility model is primarily aimed at last class, but also can be used for back one class.

Compared with prior art, the utility model only need be backed out the protecting cover of crude oil pump adjusted tooth bar afterbody when using, screw on Fuel Cut Solenoid Valve of the present utility model and get final product, and is easy to install, quick.

Description of drawings:

Fig. 1 is the utility model embodiment's structure cross-sectional schematic (piston is in the overhanging state of nature).

Fig. 2 is installed in structure cross-sectional schematic (piston is in the state that is held by coil) on the oil pump for the utility model embodiment.

Embodiment is described in further detail the utility model below in conjunction with accompanying drawing.

As Fig. 1, shown in Figure 2, oil cut-off solenoid valve for diesel engine includes front case (2), inner end cap (5), the housing that rear case (9) and rear end cover (10) constitute, in rear case (9) cavity, be provided with the coil winding (6) and the winding support (7) thereof that comprise heavy current hauling-eye parallel with one another and light current hold-in winding, one piston of being made by permeability magnetic material (4) is positioned at coil (6) in-core, piston (4) head is connected with and stretches into front case (2) inner chamber, the fore-set of making by non-magnet material (1), under nature, described fore-set (1) is stretching out under the support of Returnning spring (3) outside the front case (2), as shown in Figure 1, and at piston (4) by coil (6) when holding, described fore-set (1) contracts in front case (2), as shown in Figure 2; In the present embodiment, described spring (3) one ends withstand on the inner end cap (5), and the other end withstands on the anterior interior step of front case (2), can certainly do other different settings, particularly under the situation of omitting inner end cap (5); (8) are the piston guide tube among the figure, and (11) fill glue for the lead of drawing of coil, (12) for sealing.

During installation, back out the protecting cover of oil pump (15) upper rack (13) afterbody, front case of the present utility model (2) directly is spun on the link (14), as shown in Figure 2, so the adjusting tooth bar (13) of fore-set (1) i.e. with oil pump is relative; When the diesel engine electric switch is opened, hauling-eye and hold-in winding are switched on simultaneously, hauling-eye produces maximum magnetic force inspiration piston (4) and fore-set (1) under the heavy current state, hauling-eye cuts off the power supply automatically then, and continuing the state that contracts after maintenance piston (4) is under the light current effect by hold-in winding, thereby leave oil pump for and regulate the enough stroke spaces of tooth bar (13), enough fuel deliveries are arranged, make oil circuit keep unimpeded to guarantee motor; When electric switch cut out, hold-in winding also cut off the power supply, and piston (4) just protracts down in its Returnning spring (3) effect, and fore-set (1) will head on adjusting tooth bar (13) dotted line position to Fig. 2, thereby close oil circuit, engine misses.

The setting of the utility model inner end cap (5) is an optimum scheme, for the consideration of aspect factors such as manufacture cost also can omit need not, but effect is relatively poor; And described inner end cap (5), rear case (9) and rear end cover (10) are preferably made with permeability magnetic material, with the pure iron is best, thereby the three constitutes a magnetic loop cavity, add that fore-set (1) made by non-magnet material, thereby pump rack (13) can not attracted by the magnetic force that coil (6) are produced when solenoid valve energising work, thereby ensures that diesel engine its fuel-flow control when running well is not subjected to of the present utility model the influence.

Claims (4)

1. oil cut-off solenoid valve for diesel engine, comprise by front case (2), the housing that rear case (9) and rear end cover (10) constitute, in rear case (9), be provided with the coil winding (6) that comprises heavy current hauling-eye parallel with one another and light current hold-in winding, one piston of being made by permeability magnetic material (4) is positioned at coil (6) in-core, it is characterized in that described piston (4) head is connected with stretches into front case (2) inner chamber, the fore-set of making by non-magnet material (1), under nature, described fore-set (1) stretches out outside the front case under the support of Returnning spring (3), and at piston (4) by coil (6) when holding, described fore-set (1) contracts in front case (2).

2. oil cut-off solenoid valve for diesel engine as claimed in claim 1 is characterized in that being provided with an inner end cap (5) at described front case (2) and rear case (9) link position, and the inner chamber of front case (2) with rear case (9) separated.

3. oil cut-off solenoid valve for diesel engine as claimed in claim 1 or 2 is characterized in that described rear case (9), rear end cover (10) made by permeability magnetic material.

4. oil cut-off solenoid valve for diesel engine as claimed in claim 2 is characterized in that described inner end cap (5) made by permeability magnetic material.

Images