前苏联专利SU1632375A3 Diesel engine electrically controlled fuel pump with sprayer

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专利附录

专利说明

权利要求

类似技术

同族专利

引用文献

法律状态

优先权

专利摘要:
The invention relates to the field of engine-building. The aim of the invention is to improve the accuracy of controlling the time of the beginning and end of fuel injection. The pump includes a housing I with a plunger 2, a working chamber 3 for compressing fuel by a plunger 2, connected by a channel 4 with a booster pump 5, connected to the chamber 3 through a valve 6, a nozzle 7 and a cavity 9 3 3 (L U4
公开号:SU1632375A3
申请号:SU853952647
申请日:1985-09-13
公开日:1991-02-28
发明作者:Эблен Эвальд；Хофманн Карл；Хольцгрефе Фолькер；Пижруле Жан；РОДРИГЕС-АМАЯ Нестор
申请人:Роберт Бош Гмбх (Фирма)；
IPC主号:

专利说明:

YOUR & SAL & & KL. , -4b (dg; 1G.; -.
Sie & gst & tVMto:
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low pressure, and in the canap 8 there is an electrically controlled bypass valve 10 having a body II, an electrical link 12, a valve link 13 connected to it with a spring, an equalizing rod located in the hole, and a conical locking surface 17 interacting with a saddle 13, below which the restrictive orifice 19 is located. Valve element 13 is provided with an annular groove, which together with the cavity in the housing 1 forms a heated one, and is also equipped with a gradually populated rotationally symmetric bridge. The valve stem I3 is equipped with a blind hole with
cork interacting with a travel stop. The valve bit 13 is provided with a first conical section and a second bevelled section. The fuel chamber of the working chamber 3 is produced from the low pressure cavity 9, into which it is supplied by the pump 5. During the injection course of the plunger 2, fuel is first forced back into the low pressure cavity 9, and then from the shutdown channel 8, the valve 10 is fed to nozzle 7 and in diesel. The fuel supply is interrupted when the bypass valve 10 is opened. 6 h "n. f-ly, 5 ill.
The invention relates to dvngateley engineering and can be used in a 25 diesel fuel system.
The aim of the invention is to improve the accuracy of controlling the time of the beginning and end of fuel injection.
On fng.1 shows a constructive scheme of the fuel pump with a nozzle; FIG. 2 shows the direct flow bypass valve; FIG. FIG. 3 shows the lower part of the overflow valve; , figure 4 - nozzle valve Evena bypass valve with two conical sections; FIG. 5 shows a valve link nozzle, which is made convex in the direction of the aperture. 4Q
The pump includes a housing 1, a plunger 2, which is driven by a constant stroke, limited by the last working chamber 3 and connected by a channel 4 to a booster pump 5 connected to the working chamber 3 through a discharge valve 6 through a pressure valve 6 connected to the working chamber 3. the channel 8 is a low-pressure cavity 9, and in the bypass channel 8 there is an electrically controlled by-pass valve 10 having a body II acting in the direction of closing the valve 10 an electric actuator 12, a valve link 13 connected to it, direction of opening of the return spring 14, tsilivdrichesky apravl guide rod 15 zveya valve 13 disposed
55
. t x.frfr -. h- v
,
guide hole 16 with a small gap, remote from the actuator 12 and located on the end portion of the valve even 1 3 conical locking surface 17, which is designed to interact with the latter conical seat 18 of the relief valve 10 with the fuel flow restricting hole 19 n surrounding the valve element 13 in the form of an annular groove 20, a pressure chamber located between the valve seat 18 and the guide rod 15, which is directly connected to the pump working chamber 3 via the bypass anal 8 and through ogranichnlayuschee fuel flow hole 19 with the cavity 9 low pressure. The largest diameter of the locking conical surface 17 is made equal to the diameter of the guide rod 15, the diameter of the valve seat limiting hole 19 is smaller than the diameter of the guide rod 15, the width of the seating surface of the conical valve seat 18 is equal to several tens of millimeters, and the pressure chamber 20 is directly adjacent to valve 18 seat. The valve link 13 below the taper locking surface 17 is provided with a gradually pointed rotator with a symmetrical nozzle 21 to support the movement of the valve link lift in the opening direction.
h,
516
The valve valve 13 is placed between the guide rod 15 and the restriction placed on the conical section of the locking surface 17, made in the form of a groove 22 for increasing the volume of the pressure chamber 20.
The guide rod 15 of the valve link 13 from the side of the executive Even is provided with a blind hole 23 and a hardened stopper 24 for closing the latter, as well as with a regulating stop 25 of the stroke of the valve link, configured to interlock with the stopper 24.
The nozzle of the valve link 13 is made in the pide of the line-like headpiece 26, the outer contour of which has a first conical section 27 connected to the locking surface J7, to which the second bevelled section 28 is attached along the central axis.
Nozzle valve link 13 is made predominantly convex in the direction of the hole 19, limiting the jet of fuel -.
The difference of the landing angles of the conical locking surface 17 of the valve link 13 and the conical seat 18
valve at the tops is made equal to 0.5 °.
The device works as follows.
The fueling of working chamber 3 is made from the low pressure cavity 9, where fuel is supplied by the booster pump 5. During the injection stroke of the plunger 2, the fuel from the working chamber 3 is first forced back into the low pressure cavity 9. The fuel supply to the nozzle 7 via the injection valve b starts from the moment the overflow channel 8 is blocked by the electrically controlled bypass valve 10. Fuel is injected into the diesel. The fuel supply to the engine stops at the moment of opening the bypass valve 10, starting from which the fuel pressure in the working chamber 3 drops abruptly, the discharge valve 6 sits on its saddle. The design features of the valve even 13 provide the specified opening speed and close the bypass valve 10, which promotes achievement; the greatest efficiency of the devices .-. -., -,
-Skin zhezeyyuzv.
v -r - $ l. g / Tlkim way, the invention improves the accuracy of control the time of the beginning and end of the injection of nausea.

权利要求:
Claims (3)
[1]
Invention Formula
0
five
0
five
five
0
five
five
1. An electrically-controlled high-pressure fuel pump with a diesel injector, comprising a housing disposed therein. a constant-stroke plunger, limited by the last working chamber, connected by a channel with a booster pump, connected to the working chamber via a nozzle pressure valve and a low pressure cavity through the bypass channel, with an electrically controlled bypass valve having a housing located in the bypass channel an electric actuator acting in the direction of closing the valve, a valve element connected with it, loaded in the direction of its opening by a return spring, a cylindrical direction valve link, spaced in the guide hole with a small clearance, remote from the actuator and located on the end section of the valve link, a conical locking surface that is capable of interacting with the latter conical seat of the bypass valve with a hole restricting the flow of fuel and covering valve element in the form of an annular groove a pressure chamber located between the valve seat and the guide rod, which is directly connected to the working chamber pump through the bypass channel: and through the restricting flow of fuel hole - with a low pressure cavity, characterized in that, in order to improve the accuracy of control of the start times
0 and the end of fuel injection, the largest diameter of the locking conical surface is made equal to the diameter of the guide rod, the diameter of the valve seat restricting hole is smaller than the diameter of the guide rod, the width of the seating surface of the conical valve seat is several tenths of a millimeter, and the head chamber
(.5pr H 5vfeS
..
pa is made directly along the valve seat.
2. A pump in accordance with claim 1, characterized in that the valve below the conical locking surface is provided with a constantly chaos-free rotational-symmetric head, which supports the movement of the valve link in the opening direction.
[2]
3. The pump in accordance with claim 1, in which it is provided that the valve zieno is provided between the guide rod and the restriction surface located on the conical section and made in the form of a groove to increase the volume of the pressure chamber.
[3]
A. Nasog according to claim 1, about tl and h and y - Sch and I with the fact that the guided rod of the valve link from the side of the executive link is provided with a blind hole and a hardened stopper to close the latter, as well as
J- f, g-
. "-. J U.
- G | - at tu 4;
., Chyushchnn 01rtnnchntel move to the p-plnno link, made with the ability to interact with the tube.
5. The pump according to claim 2, which is different from the fact that the valve stem nozzle is made in the form of a linch-like head, the outer contour of which has a conical section that is adjacent to the locking surface with a constant angle of inclination. the central axis is a convex portion.
6. Pump according to Claim 5, characterized in that the valve link nozzle is substantially convex in the direction of the orifice delimiting the jet topl.1
7. Pump according to Claim 6, characterized in that the length of the seating angles of the conical valve and valve surface of the valve and the Koi valve seat at the apex are made equal to 0.5.
Priority on ip 1-4.7 14.09.8,
Priority in p.p.5.6 02.07.85.
fig.Z
- ,, v s -, - t. i i
. ,
i-sl;
q / 19 FY-.5
fig

类似技术:

公开号 | 公开日 | 专利标题

SU1632375A3|1991-02-28|Diesel engine electrically controlled fuel pump with sprayer

US4129254A|1978-12-12|Electromagnetic unit fuel injector

US4741478A|1988-05-03|Diesel unit fuel injector with spill assist injection needle valve closure

US5820033A|1998-10-13|Fuel injection nozzle

US5551634A|1996-09-03|Fuel injection nozzle for an internal combustion engine

DE69738385T2|2008-12-04|Fuel injection device for internal combustion engines

US4951874A|1990-08-28|Unit fuel injector

EP0937891B1|2003-10-01|Fuel Injector

US5072882A|1991-12-17|High pressure fuel injection device for engine

EP0084662A1|1983-08-03|Fuel injector for internal-combustion engines

US4566635A|1986-01-28|Fuel injection nozzle for internal combustion engines

SU1426464A3|1988-09-23|Fuel injection device

EP0767304A1|1997-04-09|Injector

KR19990078000A|1999-10-25|Fuel injector

US5004154A|1991-04-02|High pressure fuel injection device for engine

US3952711A|1976-04-27|Diesel injection nozzle with independent opening and closing control

US6305359B1|2001-10-23|Fuel injection valve for internal combustion engines

GB2276676A|1994-10-05|Fuel-injection device,in particular a monobloc injection pump and nozzle for combustion engines

GB2282183A|1995-03-29|I.c.engine fuel injector

EP0304749B1|1993-07-28|Electromagnetically-controlled fuel injection valve for i.c. engines

US5826793A|1998-10-27|Two rate fuel injector

US6463914B2|2002-10-15|Regulating member for controlling an intensification of pressure of fuel for a fuel injector

US4834055A|1989-05-30|Fuel injection system

US4903896A|1990-02-27|Fuel injection device for an internal combustion engine having preinjection and main injection air compression and self-ignition

US3446440A|1969-05-27|Double injection system with one nozzle

同族专利:

公开号 | 公开日

ES546948A0|1986-11-16|

BR8504429A|1986-07-15|

US4653455A|1987-03-31|

DE3581160D1|1991-02-07|

AT59434T|1991-01-15|

EP0178427B1|1990-12-27|

JPS6172867A|1986-04-14|

EP0178427A3|1987-12-09|

JPH0574709B2|1993-10-19|

EP0178427A2|1986-04-23|

ES8701304A1|1986-11-16|

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法律状态:

优先权:

申请号 | 申请日 | 专利标题

DE3433711|1984-09-14|

DE3521425|1985-06-14|

DE19853523536|DE3523536A1|1984-09-14|1985-07-02|Electrically controlled fuel injection pump for internal combustion engines|

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