CN201013504Y

CN201013504Y - Diesel engine fuel injection electric control unit pump

Info

Publication number: CN201013504Y
Application number: CNU2006200531035U
Authority: CN
Inventors: 龙美彪; 黄民备; 李少鹤; 涂选举; 邹云川; 罗年生; 熊明富; 邓飞
Original assignee: YAXINKE NANYUE (HENGYANG) CO Ltd
Current assignee: YAXINKE NANYUE (HENGYANG) CO Ltd
Priority date: 2006-12-07
Filing date: 2006-12-07
Publication date: 2008-01-30
Anticipated expiration: 2016-12-07

Abstract

An electronically controlled fuel ejection monoblock pump of a diesel engine comprises a piston coupling part, an electromagnetic valve part, a damping valve part, a piston spring and a spring seat. The piston coupling part comprises a piston sleeve and a piston, the piston sleeve is installed in the hole of an engine block or externally hung in the hole of a camshaft box body, the electromagnetic valve part is installed in the installation hole of the valve sleeve on the piston sleeve, on which the damping valve is installed, and the piston and the piston spring and the spring seat are integrally connected via clip springs and the piston sleeve. The utility model is a time-controlled electronically controlled fuel ejection system controlled by an electronic control unit (ECU), which can meet the Euro 3 Emission Standards and above, and reduce oil consumption, the pressure of the pump end exceeds 1300 bar, the control precision is high, the control is flexible, the optimal oil ejection quantity and timing can be realized under various working conditions, and the utility model has a wide power range, being applied to light-duty and heavy-duty vehicles, diesel engines of locomotives and ships and generator sets.

Description

The injecting fuel of diesel motor electronically controlled unit pump

Technical field

The utility model relates to a kind of diesel engine, particularly a kind of injecting fuel of diesel motor electronically controlled unit pump.

Background technique

Existing injecting fuel of diesel motor pump is machinery control, control the fuel injection quantity and the oil spout moment by mechanical devices such as speed regulator, advancing devices, control accuracy and control flexibility are low, and control range is narrow, can only control a few operating point, can't accurately control in all operating modes; Injection Pump pump end pressure is usually less than 1000bar, and is subjected to structure and principle restriction, has increased leakage as various straight troughs, skewed slot are arranged on the plunger, has reduced strength and stiffness, and the pump end pressure is difficult to bring up to more than the 1300bar.Owing to there are these deficiencies, the high-pressure injection pump of machinery control can't reach Europe 3 and above emission standard.

Summary of the invention

The purpose of this utility model is the deficiency for the high-pressure injection pump that overcomes existing mechanical control, and a kind of injecting fuel of diesel motor electronically controlled unit pump by electronic control unit (ECU) control is provided, it can satisfy Europe 3 above emission standards, it is low to have oil consumption, the control accuracy height, control all can realize characteristics such as optimum fuel injection quantity and injection timing flexibly under the various operating modes.

The technical solution of the utility model is: the injecting fuel of diesel motor electronically controlled unit pump comprises plunger coupled parts, electromagnetic valve components, orifice valve parts, piston spring and spring seat, plunger coupled parts comprises plunger bushing and plunger, plunger bushing is installed in engine cylinder body opening or the plug-in camshaft case body opening by seal ring, and electromagnetic valve components is installed in the valve pocket mounting hole on the plunger bushing; Orifice valve is installed on the plunger bushing, and plunger, piston spring, spring seat connect into an integral body by jump ring and plunger bushing.

Plunger hole, valve pocket mounting hole, oil inlet and oil return hole, ring shaped oil passage and oil duct are arranged on the plunger bushing, the oil inlet end in oil inlet and oil return hole originates in the ring shaped oil passage of plunger bushing, ring shaped oil passage is formed the oil pocket of sealing by seal ring and inner chamber of cylinder block, the oil pocket UNICOM of this end of electromagnet is installed on the other end in oil inlet and oil return hole and the plunger bushing, oil inlet and oil return hole UNICOM by the other end on oil duct and the plunger bushing again, oil inlet and oil return hole and ring shaped oil passage UNICOM.

Electromagnetic valve components comprises valve pocket, the control spool, electromagnet, armature, adjust backing plate, cover plate, the electromagnet spring, the electromagnet spring seat, armature fastening screw trip bolt and block, valve pocket and control spool are formed the hydraulic control valve coupling, valve pocket and plunger bushing interference fit, sealing taper hole of fitting with control spool sealing cone and the oilhole that communicates with the plunger bushing oil channel hole are arranged on the valve pocket, the installation screw is arranged on the electromagnet, electromagnet, adjusting backing plate and cover plate is installed on the plunger bushing by screw, armature, the electromagnet spring, the electromagnet spring seat is installed on the control spool by the armature fastening screw trip bolt, solenoid valve is the switch valve of two-bit triplet, and the junction plane of solenoid valve and plunger bushing has the seal ring that prevents that low-voltage fuel from leaking.

The orifice valve parts comprise orifice valve, damping valve seat, spring and fuel-displaced plug, and orifice valve is installed on the plunger bushing by damping valve seat, spring and fuel-displaced plug, and orifice valve and damping valve seat are by conical surface seal, damping valve seat and plunger bushing interference fit.

The installation screw of electromagnet is at the distance of the vertical direction distance than substantially horizontal.

Block and adjustment backing plate are formed the solenoid valve stroke and the air gap regulating mechanism of control electromagnetic valve stroke and air gap.

The high-speed electromagnetic valve control that fuel injection amount and injection timing are driven by electronic control unit ECU.

The utility model has following beneficial effect than prior art:

The utility model injecting fuel of diesel motor electronically controlled unit pump is the time-based control electric control fuel oil jet system, control by electronic control unit (ECU), can be in all operating modes, operation intention by sensor acquisition automobile and engine operation condition and driver, ECU is according to the signal of sensor input, drive the electronically controlled unit pump solenoid valve, switch the flow direction of the high pressure fuel that produces by the plunger high-speed motion by solenoid valve, in the suitable moment, high pressure fuel enters oil sprayer by high-pressure oil pipe, and oil sprayer sprays into cylinder with high pressure fuel.Owing to adopt the solenoid valve of electronic control and high-speed response, can realize accurate, the Flexible Control of fuel injection quantity, injection timing and injection pressure, improve the engine cylinder internal combustion, thereby reduce the noxious emission of motor, improve Economy, power character and the steerability of motor.Do not regulate the skewed slot of oil mass on the plunger, reduced leakage, improved rigidity and intensity, the pump end pressure is up to more than the 1300bar, and peak injection pressure reaches more than the 1800bar; Electronically controlled unit pump is lower than high-pressure common rail injection system cost, and cost performance is higher; Both can directly be installed on the engine cylinder-body, drive fuel feeding by valve camshaft, shorten high-pressure oil pipe length, again can be by plug-in camshaft case mode, do not do at motor under the situation of big change, realize that the existing diesel emission level of mechanical pump in upright arrangement that adopts is upgraded to Europe 3 by Europe 2, satisfy Europe 3 above emission standards, reduce oil consumption, its pump end pressure reaches more than the 1300bar, control accuracy height, control all can be realized optimum fuel injection quantity and injection timing flexibly under the various operating modes; Product power wide coverage is fit to use and marine diesel engine and generator set to heavy goods vehicles usefulness, locomotive from light-duty.

Below in conjunction with the drawings and specific embodiments structure of the present utility model is further described.

Description of drawings

Accompanying drawing 1 is a structural representation of the present utility model;

Accompanying drawing 2 is the right elevation of accompanying drawing 1.

Embodiment

As shown in drawings: the injecting fuel of diesel motor electronically controlled unit pump comprises plunger coupled parts, electromagnetic valve components, orifice valve parts, piston spring 4 and spring seat 5; Plunger coupled parts comprises plunger bushing 11 and plunger 12, ring shaped oil passage 114 and oil duct 115 between plunger hole 111, valve pocket mounting hole, oil inlet and

oil return hole

112 and 113, the seal ring 13 and 14 are arranged on the plunger bushing 11, and plunger bushing 11 is installed in engine cylinder body opening or the plug-in camshaft case body opening by seal ring 13,14; Electromagnetic valve components comprises valve pocket 21, control spool 22, electromagnet 23, armature 24, adjust backing plate 25, cover plate 26, electromagnet spring 27, electromagnet spring seat 28, armature fastening screw trip bolt 29 and block 30, valve pocket 21 and control spool 22 are formed the hydraulic control valve coupling, valve pocket 21 and block 30 are installed in the valve pocket mounting hole on the plunger bushing 11, and valve pocket 21 and plunger bushing 11 interference fit, sealing taper hole of fitting with control spool 22 sealing cones and the oilhole that communicates with plunger bushing 11 oil channel holes are arranged on the valve pocket 21, electromagnet 23, adjusting backing plate 25 and cover plate 26 is installed on the plunger bushing 11 by long spiro nail 231, armature 24, electromagnet spring 27, electromagnet spring seat 28 is installed on the control spool 22 by armature fastening screw trip bolt 29, control spool 22 can move with armature 24 under the electromagnet suction effect at armature 24, solenoid valve is the switch valve of two-bit triplet, the junction plane of solenoid valve and plunger bushing 11 has

seal ring

15,16 and 17, leak to prevent low-voltage fuel; The orifice valve parts comprise orifice valve 31, damping valve seat 32, spring 33 and fuel-displaced plug 34, orifice valve 31 is installed on the plunger bushing 11 by damping valve seat 32, spring 33 and fuel-displaced plug 34, orifice valve 31 passes through conical surface seal, damping valve seat 32 and plunger bushing 11 interference fit with damping valve seat 32; Plunger 12, piston spring 4, spring seat 5 connect into an integral body by jump ring 6 and plunger bushing 11; Plunger bushing 11 is by seal ring 13,14 and engine cylinder body opening or plug-in camshaft case body opening composition closed chamber, make the fuel oil in the ring shaped oil passage 114 on the plunger bushing 11 can not leak into following cam axocoel (not shown), cause oil dilution and wear cam axle (not shown), block 30 and adjustment backing plate 25 are formed solenoid valve stroke and air gap regulating mechanisms, the solenoid valve stroke and the air gap of control, high pressure fuel enters high-pressure oil pipe by orifice valve 31, can prevent secondary injection and produce air pocket.The oil inlet end in the oil inlet and oil return hole 112 on the plunger bushing 11 originates in the ring shaped oil passage 114 of plunger bushing 11, ring shaped oil passage 114 is formed the oil pocket of sealing by seal ring 13,14 and inner chamber of cylinder block, the oil pocket UNICOM of this end of electromagnet 23 is installed on the other end in oil inlet and oil return hole 112 and the plunger bushing 11, pass through oil inlet and oil return hole 113 UNICOMs of the other end on oil duct 115 and the plunger bushing 11 again, oil inlet and oil return hole 113 and ring shaped oil passage 114 UNICOMs.Four long screws 231 of electromagnet are longer than the distance L 2 of substantially horizontal in the distance L 1 of vertical direction.

The utility model can directly insert engine cylinder-body when using or be installed in the plug-in camshaft casing.Its working principle is as follows:

Plunger 12 moves upward under the driving of camshaft (not shown), fuel oil in the compression plunger hole 111, fuel pressure raises, and the electronic control unit driver module gives electromagnet 23 energisings in the suitable moment, and armature 24 drives control spool 22 and moves to electromagnet 23 directions, the hydraulic control valve conical surface cuts out, fuel pressure raises rapidly, and high pressure fuel is opened orifice valve 31, passes through high-pressure oil pipe, open oil sprayer, fuel oil sprays into cylinder.After satisfactory fuel amount sprays into cylinder, the electronic control unit driver module stops to electromagnet 23 energisings, under 27 effects of electromagnet spring, control spool 22 is to leaving the motion of electromagnet 23 directions, and the hydraulic control valve conical surface is opened, and high pressure fuel flows out from the conical surface, pressure descends rapidly, orifice valve 31 is closed, and oil sprayer cuts out, end of injection.When entering the cam profile descending branch, plunger 12 moves downward under piston spring 4 effects, by oil suction the ring shaped oil passage 114 of oil inlet and oil return hole 112,113 from plunger bushing 11, makes in the plunger hole 111 to be full of fuel oil, for next oil spout is got ready.

Claims

1. injecting fuel of diesel motor electronically controlled unit pump, it is characterized in that it comprises plunger coupled parts, electromagnetic valve components, orifice valve parts, piston spring and spring seat, plunger coupled parts comprises plunger bushing and plunger, plunger bushing is installed in engine cylinder body opening or the plug-in camshaft case body opening by seal ring, and electromagnetic valve components is installed in the valve pocket mounting hole on the plunger bushing; Orifice valve is installed on the plunger bushing, and plunger, piston spring, spring seat connect into an integral body by jump ring and plunger bushing.

2. injecting fuel of diesel motor electronically controlled unit pump according to claim 1, it is characterized in that plunger hole is arranged on the plunger bushing, valve pocket mounting hole, oil inlet and oil return hole, ring shaped oil passage and oil duct, the oil inlet end in oil inlet and oil return hole originates in the ring shaped oil passage of plunger bushing, ring shaped oil passage is formed the oil pocket of sealing by seal ring and inner chamber of cylinder block, the oil pocket UNICOM of this end of electromagnet is installed on the other end in oil inlet and oil return hole and the plunger bushing, oil inlet and oil return hole UNICOM by the other end on oil duct and the plunger bushing again, oil inlet and oil return hole and ring shaped oil passage UNICOM.

3. injecting fuel of diesel motor electronically controlled unit pump according to claim 1, it is characterized in that electromagnetic valve components comprises valve pocket, the control spool, electromagnet, armature, adjust backing plate, cover plate, the electromagnet spring, the electromagnet spring seat, armature fastening screw trip bolt and block, valve pocket and control spool are formed the hydraulic control valve coupling, valve pocket and plunger bushing interference fit, sealing taper hole of fitting with control spool sealing cone and the oilhole that communicates with the plunger bushing oil channel hole are arranged on the valve pocket, the installation screw is arranged on the electromagnet, electromagnet, adjusting backing plate and cover plate is installed on the plunger bushing by screw, armature, the electromagnet spring, the electromagnet spring seat is installed on the control spool by the armature fastening screw trip bolt, solenoid valve is the switch valve of two-bit triplet, and the junction plane of solenoid valve and plunger bushing has the seal ring that prevents that low-voltage fuel from leaking.

4. injecting fuel of diesel motor electronically controlled unit pump according to claim 1, it is characterized in that the orifice valve parts comprise positive Buddhist nun's valve, damping valve seat, spring and fuel-displaced plug, orifice valve is installed on the plunger bushing by damping valve seat, spring and fuel-displaced plug, orifice valve and damping valve seat are by conical surface seal, damping valve seat and plunger bushing interference fit.

5. injecting fuel of diesel motor electronically controlled unit pump according to claim 3 is characterized in that the installation screw of electromagnet is longer than the distance L 2 of substantially horizontal in the distance L 1 of vertical direction.

6. injecting fuel of diesel motor electronically controlled unit pump according to claim 3 is characterized in that block and adjusts solenoid valve stroke and the air gap regulating mechanism that backing plate is formed control electromagnetic valve stroke and air gap.

7. injecting fuel of diesel motor electronically controlled unit pump according to claim 1 is characterized in that the high-speed electromagnetic valve control that fuel injection amount and injection timing are driven by electronic control unit ECU.