CN2443154Y

CN2443154Y - Oil stopping electromagnetic valve for improved diesel engine

Info

Publication number: CN2443154Y
Application number: CN 00249191
Authority: CN
Inventors: 董明生; 叶邦恩
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-09-10
Filing date: 2000-09-10
Publication date: 2001-08-15
Anticipated expiration: 2010-09-10

Abstract

The utility model relates to an oil stopping electromagnetic valve for an improved diesel engine. A casing is provided with a front end cap (1), a front casing (6) and a rear casing (8) from front to rear; a coil winding 5 is arranged in the front casing (6); a piston (7) is made of magnet conductive material and is positioned in a coil core (5); the head of the piston (7) is connected with a top rod (2) made of non magnet conductive material. The utility model is characterized in that the coil winding (5) is a single sucking coil; the tail of the piston (7) is provided with a reset spring (10); the piston (7) and the top rod (2) retract supported by the reset spring (10) when the coil (5) is not energized and extend forward sucked by the coil (5) when the coil (5) is energized. The utility model changes the original oil feeding into oil stopping when the coil is energized; the coil is not energized when an engine starts, and therefore, the coil can not be damaged.

Description

The modified model 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.

As everyone knows, diesel engine adopts the ignition by compression mode, thereby to make that diesel engine is flame-out not only will turn off electric switch, also must cut off oil pump feed, in order to realize as petrol engine, only to need the switch electric switch just can light a fire automatically, flame-out, both at home and abroad each manufacturers design multiple Fuel Cut Solenoid Valve, initial design is the oil-break pull bar at the control diesel engine, then had at the stroke of regulating tooth bar in the high pressure oil pump of control diesel engine, should regulate the tooth bar ecto-entad when solenoid valve is pushed into the oil-break position and can makes the diesel engine oil-break flame-out, " oil cut-off solenoid valve for diesel engine " of our ZL98224472.X of utility model patent formerly and " the difunctional oil cut-off solenoid valve for diesel engine " of ZL98224539.4 are exactly like this, they all are provided with the coil winding that includes heavy current hauling-eye and light current hold-in winding parallel with one another in housing, an and piston of making by permeability magnetic material that is positioned at coil core, piston crown is provided with the fore-set of being made by non-magnet material, under nature, fore-set stretches out housing under the support of Returnning spring anterior and the adjusting tooth bar ecto-entad of diesel engine oil pump is pushed into the oil-break position, and when coil electricity, coil attracts piston and fore-set retraction thereof, and the adjusting tooth bar of diesel engine oil pump obtains stroke space from inside to outside heavily again.The difference of above-mentioned binomial patent is, the former at be the diesel engine oil pump that does not have smog-control device, the latter at be the diesel engine oil pump that has smog-control device, and so-called " smog-control device " is exactly to be used for that the adjusting tooth bar to oil pump provides suitable resistance to control the suitable fuel delivery of oil pump when oil pump increases fuel delivery rapidly, in order to avoid, mixed air out of proportion cause burn insufficient, tail gas row black smoke excessive because of fuel delivery.Above-mentioned binomial patent is subjected to auto vendor's favorable comment of domestic use diesel engine deeply because of its volume is small and exquisite, easy for installation, easy to use, and promotion and implementation, yet find that in actual use these two kinds of design proposals also exist such defective: because the solenoid valve of the two is when work, one of them coil is to continue energising, and the circuit of sucking coil and starter motor is linked together, therefore when vehicle caused long-time starting for a certain reason, coil might be burnt out.

The purpose of this utility model can effectively avoid starting for a long time to cause because of vehicle the modified model oil cut-off solenoid valve for diesel engine of damage with regard to being to provide at above-mentioned prior art present situation a kind of advantage that can keep former design proposal.

Mentality of designing of the present utility model is the usage mode that changes former design proposal, oil-break when logical oil is for energising when changing original energising, based on such mentality of designing, design proposal of the present utility model is: the modified model oil cut-off solenoid valve for diesel engine includes housing and is positioned at the piston of housing, housing includes front cover from front to back, front case and rear case, be provided with coil winding in the front case, piston is made by permeability magnetic material and is positioned at coil core, the head of piston is connected with a push rod of being made by non-magnet material, it is characterized in that described coil winding is single sucking coil, the afterbody of piston is provided with Returnning spring, described piston and push rod thereof do not contract after under the support of this Returnning spring when coil is switched on, and when coil electricity under coil attracts to protracting and compressing this Returnning spring.

For cooperating those originally to have the oil pump of smog-control device, can also can have a blind hole in described piston tail, slip joint and supported spring thereof are set in it, the afterbody of slip joint is stretched outside piston tail under its supported spring effect, and offsets with the adjusting screw that is arranged on the rear case afterbody when no electric circuit.

Compared with prior art, the utility model still is connected the link that the front cover and the oil pump of diesel engine are regulated the tooth bar afterbody, when needs are flame-out, make the sucking coil energising, the adjusting tooth bar ecto-entad that piston and push rod thereof protract the diesel engine oil pump is pushed into the oil-break position, only need the moment energising to get final product oil-break, and when engine start and running, the sucking coil no electric circuit, piston and push rod thereof contract after under the effect of Returnning spring, make the adjusting tooth bar of diesel engine oil pump have normal stroke space.Because sucking coil is not switched on when engine start, thereby also just do not exist so and the problem of damage.So the utility model had both kept volume advantage small and exquisite, easy for installation, easy to use, had overcome the existing in prior technology defective again, be product more of new generation.

Description of drawings:

Fig. 1 is the utility model embodiment one a structure cross-sectional schematic (coil is "on" position not).

Fig. 2 is the utility model embodiment two a structure cross-sectional schematic (coil is "on" position not).

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

As shown in Figure 1, be embodiment one of the present utility model, be applied to the diesel engine oil pump of non smoke controller, include housing and the piston 7 that is positioned at housing, housing includes front cover 1 from front to back, front case 6 and rear case 8, be provided with coil winding in the front case 6, this coil 5 is single sucking coil, on coil carrier 4, piston 7 is made by permeability magnetic material and is positioned at coil core, and the head threads of piston 7 is connected with the afterbody periphery that push rod 2, one Returnning springs 10 of being made by non-magnet material are enclosed within piston 7, its rear end withstands on the outer step of piston 7 afterbodys, and its front end withstands on the interior step of rear case 8 heads; Described piston 7 and push rod 2 thereof do not contract after under the support of Returnning spring 10 when coil 5 is switched on, and when coil 5 energising under coil 5 attracts to protracting and compression reseting spring 10.

Described rear case 8 afterbodys are opening preferably, and be provided with a rear end cover 11 of making by nonmagnetic substance therein, as shown in fig. 1,3 is the piston guide tube among the figure, 9 are sealing filling glue, 12 the leads of drawing for

coil

5, and 21 is the link of oil pump, 22 is the adjusting tooth bar of oil pump, and 23 is oil pump case.

The setting of described Returnning spring 10 is not limited to accompanying drawing embodiment, and other reasonable plan can be arranged, and just its effect must be to contract can force piston 7 and push rod 2 thereof when coil 5 is not switched on after, guarantees that it is in suitable stroke.

As shown in Figure 2, be embodiment two of the present utility model, be applied to the diesel engine oil pump of smog-control device, be with the different of embodiment one, also have a blind hole at described piston 7 afterbodys, slip joint 16 and supported spring 17 thereof are set in it, the afterbody of slip joint 16 is stretched outside piston 7 afterbodys under its supported spring 17 effects, and with being arranged on rear end cover 11 ' (rear end cover 11 among this rear end cover 11 ' and the embodiment one is slightly different in shape, but also make with nonmagnetic substance) adjusting screw 15 of afterbody offsets, and adjusting screw 15 passes rear end cover and backward by being positioned at the outer locking nut 14 of rear end cover afterbody, 13 lockings.Because the existence of slip joint 16, piston 7 is not reduced to the end backward under the effect of Returnning spring 10 when coil 5 is switched on, thereby makes the adjusting tooth bar 22 of oil pump still have limited setting stroke space, is controlled in the claimed range thereby will start oil mass.

In the above-described embodiments, described front cover 1 head is provided with internal thread being threaded with the link 21 of oil pump, if but original oil pump link 21 has internal thread, and then described front cover 1 correspondingly should be provided with the outside thread that cooperates with it.Certainly, if original oil pump link 21 is that described front cover head also should make corresponding changes by the Placement beyond the screw thread, these do not exceed protection domain of the present utility model.

When the utility model was used in as installed, its control wiring can adopt disclosed circuit in No. 97112601.1 applications for a patent for invention " electromagnetic valve oil cut-off control mechanism for diesel engine ", also can directly adopt fingertip control.

Claims

1. modified model oil cut-off solenoid valve for diesel engine, include housing and the piston (7) that is positioned at housing, housing includes front cover (1) from front to back, front case (6) and rear case (8), front case is provided with coil winding 5 in (6), piston (7) is made by permeability magnetic material and is positioned at coil core (5), the head of piston (7) is connected with a push rod (2) of being made by non-magnet material, it is characterized in that described coil winding (5) is single sucking coil, the afterbody of piston (7) is provided with Returnning spring (10), described piston (7) and push rod (2) thereof do not contract after under the support of this Returnning spring (10) when switching at coil (5), and when coil (5) is switched under coil (5) attracts to protracting and compressing this Returnning spring (10).

2. modified model oil cut-off solenoid valve for diesel engine as claimed in claim 1 is characterized in that described rear case (8) afterbody opening, and is provided with a rear end cover (11,11 ') of being made by nonmagnetic substance and seals as its afterbody.

3. modified model oil cut-off solenoid valve for diesel engine as claimed in claim 1 or 2, it is characterized in that described piston (7) afterbody also can have a blind hole, slip joint (16) and supported spring (17) thereof are set in it, the afterbody of slip joint (16) is stretched outside piston tail under its supported spring (17) effect, and offsets with the adjusting screw (15) that is arranged on rear case (8) afterbody when no electric circuit.