CN202628350U - Electric control single-cylinder fuel injection pump - Google Patents

Abstract

The utility model discloses an electric control single-cylinder fuel injection pump. A spool sleeving control spring is arranged in a valve hole, the top of the spool sleeving control spring is movably sleeved in a portioning plate middle hole and the spool sleeving control spring is matched with an electromagnet on a portioning plate. A guide sleeve is used for packaging a plunger and a plunger spring inside, and an electric control unit is connected with all sensors, and is connected with the electromagnet through a transmission line. When the electromagnet is not electrified, a valve plug is controlled for jacking a spring downwards, a gap is arranged between the valve plug and a lower opening of the valve hole, and fuel enters a high-pressure oil hole and a plunger hole through the gap from a low-pressure oil cavity. When the electromagnet is electrified, the valve plug is driven by an armature to move upwards for sealing the gap between the valve plug and the lower opening of the valve hole, and the plunger moves upwards, fuel is pushed into a fuel injector through a high-pressure oil hole and a throttling valve. The electric control single-cylinder fuel injection pump is capable of automatically controlling high-pressure oil injection, reducing oil consumption and decreasing pollution; and a diesel engine is low in noise and high in efficiency and is prolonged in service life.

Description

A kind of automatically controlled single cylinder fuel injection pump

Technical field

The utility model relates to single cylinder diesel, relates in particular to diesel injection pump.

Background technique

The matched injection pump assembly of single cylinder diesel is to be made up of the pump housing, plunger coupled parts, adjusting gear, tooth bar, piston spring, delivery valve matching parts, delivery valve holder etc.; Be assemblied on the diesel engine; Operating principle is to produce high pressure by diesel engine cam through tappet body drive plunger, through oil sprayer high pressure oil is sprayed into the cylinder compression ignite, does work; By the size of the centrifugal regulator adjusting of machinery oil mass, output different capacity.This structure applications is since over half a century; Though can guarantee the supporting demand of single cylinder engine, owing to congenital structural design reason, in use exist following not enough: pressure is low, fuel oil can not fully burn; Produce a large amount of charing particle and combustion fumes, be unfavorable for environmental protection; The centrifugal regulator adjusting speed accuracy of machinery is poor, and the speed governing rate is higher, and noise is big; Fuel supply advance angle under the different rotating speeds can not be adjusted continuously, and oil consumption is bigger.China's single cylinder diesel Annual output is 700～9,000,000 at present, is the major impetus source that farm mechanization is popularized, and in rural economy activities such as transportation, irrigation, processing of farm products, has brought into play positive role.According to statistics, more than 60% of national diesel oil by single cylinder diesel consumption.Energy-saving and emission-reduction are the improved directions of single cylinder diesel, and Injection Pump is as the heart component of diesel engine, and its improvement becomes the major subjects that improves matching performance.

The model utility content

The purpose of the utility model just provides a kind of supporting high speed Injection Pump of single cylinder diesel that is used for, and improves the matching performance of complete machine power; Improve the operating mode of fuel system for diesel engine, realize accuracy controlling, improve the pump end pressure; Reduce oil consumption, reduce and pollute, reduce noise; Prolong complete machine working life, improve economic and social benefits.

The task of the utility model is to accomplish like this: design a kind of automatically controlled single cylinder fuel injection pump, and supporting for single cylinder diesel, in the pump platform on the pump housing top solenoid electric valve is housed; Match with control system, solenoid electric valve is made up of electromagnet, control valve, dividing plate, and electromagnet is installed in the dividing plate outside that fixedly installs on the pump platform; The control valve main body is arranged in the radially valve opening in the pump platform, and the hypomere pore of valve opening is communicated with the low pressure oil pocket of pump platform bottom, and the spool top connects the armature movable set in the mesopore of dividing plate; Match with electromagnet; The hypomere of set plunger outside suit piston spring in the plunger hole of the pump housing, the bottom connects the tappet body, and is outside by the sealing of guide sleeve connection pump housing suit; Control system comprises ECU and electronic throttle sensor, crankshaft rotational speed sensor, cooling-water temperature transmitter; ECU connects each sensor through signaling line, connects storage battery through supply lines, connects solenoid electric valve through power transmission line.Automatically controlled single cylinder fuel injection pump, control valve comprise spool, control spring, spring seat, spring stop, screw, armature, and spool is hollow step axis body; Be fitted in the valve opening in the pump platform, the bottom has the disc type seam, stretches out in the low pressure oil pocket that is communicated with valve opening; Endoporus installing screw in spool top is fixed on the spool top with armature, is movably arranged in the mesopore of dividing plate; Spring stop is fixed on the joint of dividing plate mesopore and valve opening, and spool epimere movable set is in the spring stop mesopore, and spool is the suit control spring outward; The top conflict spring stop of control spring, the bottom is fixed on the spring seat, and spring seat is located at the bottom of valve opening top macropore; Be fastened on the step draw-in groove in spool stage casing, spool hypomere external cylindrical surface has the ring-type shallow slot, is communicated with high pressure oilhole axial in the pump platform.Guide sleeve is a cylindrical shell, and the middle part of housing has radially relative cinclides, and the upper and lower has circular groove, installing jump ring in the circular groove.Have interlayer in the middle of the tappet body, the top has circular blind hole, and the bottom is the roller chamber that has cross through hole, is equipped with the end of plunger and piston spring in the blind hole on top, and the roller of suit bearing pin is set in the roller chamber of bottom, the end of the equipped bearing pin of cross through hole.Have the aperture of inclined oil hole of air in the low pressure oil pocket of pump platform bottom, inclined oil hole of air is connected with the oil supply hole of installing fuel feeding bolt in the pump platform.The ECU of control system can be installed in the operator cabin; Electronic throttle sensor and gas pedal are connected as a single entity; Cooling-water temperature transmitter is installed on the diesel coolant pipe; Crankshaft rotational speed sensor is installed near the support plate the diesel engine flywheel, and each sensor connects ECU through signaling line, and ECU connects electromagnet through power transmission line.When the electromagnet no electric circuit; The controlled acting force of the spring of the spool of control valve moves downwards; The web seam of spool bottom leaves the valve opening end opening and stretches into the low pressure oil pocket, and spool makes the high pressure oilhole be communicated with the low pressure oil pocket with space between the valve opening end opening, and passes through the high pressure oilhole and be communicated with plunger hole.When plunger was descending, fuel oil got into oil supply hole through the fuel feeding bolt, arrived the low pressure oil pocket through inclined oil hole of air again, got into high pressure oilhole and plunger hole through the space between spool and the valve opening end opening, and Injection Pump is in the oil suction state; When plunger is up,, then drive the active force that spool and spring seat overcome control spring if electromagnet powers up and holds armature; Move to the electromagnet direction, the web seam of spool bottom is sealed the end opening of valve opening, the passage between blocking-up low pressure oil pocket and the high pressure oilhole; This moment, Injection Pump was in the pressure oil condition; Under the Driving force effect of plunger, fuel oil is led to oil sprayer via high pressure oilhole and throttle valve, form high pressure and spray to cylinder.ECU control electromagnet energising or outage; Make logical oil of control valve or oil-break; Become the fuel injection system that is controlled to be characteristic with the time, thereby obtain comparatively ideal control performance, can be in the scope that sets according to needed numerical value to adjusting accurately on fuel feeding opportunity and fuel delivery.ECU and sensor fit applications, crankshaft rotational speed sensor are installed near the support the diesel engine flywheel, can obtain the judgement of diesel engine speed, injection timing; Cooling-water temperature transmitter is installed in the appropriate location of liquid circulation pipeline, and temperature signal feeds back to ECU, and adjustment reduces or increase fuel injection quantity automatically; Electronic throttle sensor can convert the position corner to electrical signal and feed back to ECU, and integrated treatment is carried out in control automatically, confirms fuel feeding opportunity and fuel delivery.

Implement, test according to technique scheme, prove that the utility model is rational in infrastructure, matching performance is good; Realized automatic control high pressure fuel injector, can improve the operating mode of Injection Pump and diesel engine, noise is low, efficient is high; The control oil spout is accurate, reduces oil consumption, reduces and pollutes; Increase the service life, reached predetermined purpose preferably.

Description of drawings

Fig. 1 is the overall appearance structural representation of the utility model;

Fig. 2 is that the A of Fig. 1 is to side view;

Fig. 3 is that the B of Fig. 2 is to plan view;

Fig. 4 is that the C of Fig. 2 is to the N-N cross-sectional view;

Fig. 5 is that the K of Fig. 4 is to the F-F cross-sectional view;

Fig. 6 is the monomer cross-sectional view that the pump platform 5 among Fig. 4 connects the pump housing 11;

Fig. 7 is the cross-sectional view of the tappet body 8 among Fig. 4;

Fig. 8 is the E-E cross-sectional view of Fig. 7;

Fig. 9 is the circuit control schematic representation of the utility model.

Among the figure, 1-electromagnet, 2-wiring terminal, 3-dividing plate, 4-throttle valve boss, 5-pump platform, 6-fuel feeding bolt; 7-pump postoperculum, 8-tappet body, 9-roller, 10-guide sleeve, 11-pump housing, 12-throttling spring, 13-throttling valve core; 14-spring seat, 15-spool, 16-lift block, 17-piston spring, 18-plunger, 19-control spring, 20-spring stop; 21-screw, 22-armature, 23-storage battery, 24-supply lines, 25-electronic throttle sensor, 26-signaling line, 27-ECU; 28-oil sprayer, 29-oil pipe, 30-automatically controlled simplex pump, 31-power transmission line, 32-cooling-water temperature transmitter, 33-crankshaft rotational speed sensor; A-line of vision symbol, B-line of vision symbol, C-line of vision symbol, K-line of vision symbol, N-section symbols; F-section symbols, E-section symbols, X-jump ring, Q-seal ring, Y-high pressure oilhole; J-cinclides, V-inclined oil hole of air, T-low pressure oil pocket, L-plunger hole, H-valve opening; D-throttle bore, W-blind hole, G-cross through hole, U-roller chamber, Z-bearing pin.

Embodiment

Below in conjunction with accompanying drawing the practical implementation of the utility model is explained.

Consult Fig. 1, Fig. 2, Fig. 3, electromagnet 1 are installed on the dividing plate 3 above the pump platform 5, and electromagnet 1 has two wiring terminals 2, electromagnet 1 by 4 screw on dividing plate 3.The bottom surface of pump platform 5 is sealed by pump postoperculum 7; Pump platform 5 front oil supply holes are equipped with fuel feeding bolt 6, and the end face of pump platform 5 is a throttle valve boss 4, the outside suit guide sleeve 10 of the pump housing 11 hypomeres that pump platform 5 connects; Tappet body 8 and roller 9, the embedded spring X that is installed of the draw-in groove of guide sleeve 10 are exposed in guide sleeve 10 bottoms.

Consult Fig. 4, Fig. 5, Fig. 6, electromagnet 1 is fixed on and connects pump platform 5 on the dividing plate 3, and the top of pump platform 5 is a throttle valve boss 4, and the pump platform 5 following pump housings 11 are the step axle sleeve, and the center has axial columns consent L, is communicated with the axial high pressure oilhole Y at pump platform 5 centers.High pressure oilhole Y top connects the throttle bore D in the throttle valve boss 4, radially has control valve bore H in the pump platform 5, and T is communicated with the low pressure oil pocket, and intersects with axial high pressure oilhole Y and to be communicated with.Have inclined oil hole of air V in the low pressure oil pocket T, be communicated with the oil supply hole of installing fuel feeding bolt 6, lift block 16 is installed in the low pressure oil pocket T, by pump postoperculum 7 sealings.Installing spool 15 in the valve opening H, spool 15 is a hollow thin major axis body, the hypomere exterior circular column has the ring-type shallow slot, intersects with axial high pressure oilhole Y to be communicated with; Spool 15 middle bench draw-in grooves cooperate with spring seat 14; But the end mouth of the web seam shutoff valve opening H of spool 15 bottoms; Intercept the passage of low pressure oil pocket T and high pressure oilhole Y; Also can leave mouth at the bottom of the valve opening H downwards; Stretch into low pressure oil pocket T and 16 conflicts 5 of lift block, spool 15 epimere suit control springs 19 are by spring stop 20 block that are fixed in dividing plate 3 mesopores; Spool 15 tops are stretched in dividing plate 3 mesopores, and screw 21 is fixed on spool 15 end faces with armature 22, cooperate with electromagnet 1.The equipped plunger 18 of plunger hole L in the pump housing 11, plunger 18 stretch out the part outside suit piston spring 17 below the pump housing 11, and plunger 18 bottoms connect tappet body 8.The installing of tappet body 8 lower ends roller 9, the part of plunger 18 hypomere suit piston springs 17 and the outside suit guide sleeve 10 of tappet body 8.Installing throttling spring 12 and throttling valve core 13 are combined into throttle valve in the throttle bore D on pump platform 5 tops.

Consult Fig. 7, Fig. 8, tappet body 8 is the cylindrical shape of band intermediate interlayer, and the upper end has blind hole W, and is equipped with plunger 18 bottoms and piston spring 17; Roller chamber, bottom U has cross through hole G, can be by the equipped roller 9 of bearing pin Z, with the diesel engine cam contact matching.

Consult Fig. 9; The ECU 27 of control system is installed on the operating console in the operator cabin; Be communicated with storage batteries 23 through supply lines 24, be communicated with the electronic throttle sensor 25 that is contained on the gas pedal respectively, be contained in cooling-water temperature transmitter 32 on the water-cooling tube, be contained in the crankshaft rotational speed sensor 33 on the support by the diesel engine flywheel through signaling line 26.ECU 27 is through the electromagnet 1 of the automatically controlled simplex pump 30 of power transmission line 31 connections, and automatically controlled simplex pump 30 is communicated with oil sprayers 28 through oil pipe 29.

Adopt the utility model and single cylinder diesel supporting for means of transportation is used as power, can accurately adjust fuel supply advance angle and fuel delivery within the required range, the pump end pressure is brought up to 100Mpa; Can satisfy the demand of high pressure fuel injector, the fuel oil consumption can reduce 10g/kWh, and smoke intensity is reduced to below the 1FSN; Temperature of exhaust fume reduces by 30 ℃; Matching performance is good, is the Updated product of single cylinder diesel with Injection Pump, has bright popularizing application prospect.

Claims (6)

1. automatically controlled single cylinder fuel injection pump; For single cylinder diesel supporting; It is characterized in that in the pump platform (5) on the pump housing (11) top solenoid electric valve being housed, match with control system, solenoid electric valve is made up of electromagnet (1), control valve, dividing plate (3); Electromagnet (1) is installed in dividing plate (3) outside that fixedly installs on the pump platform (5); The control valve main body is arranged in the radially valve opening (H) in the pump platform (5), and the hypomere pore of valve opening (H) is communicated with the low pressure oil pocket (T) of pump platform (5) bottom, and spool (15) top connects armature (22) movable set in the mesopore of dividing plate (3); Match with electromagnet (1); The hypomere of set plunger (18) outside suit piston spring (17) in the plunger hole (L) of the pump housing (11), the bottom connects tappet body (8), and is outside by the sealing of guide sleeve (10) the connection pump housing (11) suit; Control system comprises ECU (27) and electronic throttle sensor (25), crankshaft rotational speed sensor (33), cooling-water temperature transmitter (32); ECU (27) connects each sensor through signaling line (26), connects storage battery (23) through supply lines (24), connects solenoid electric valve through power transmission line (31).

2. according to the described automatically controlled single cylinder fuel injection pump of claim 1, it is characterized in that described control valve comprises spool (15), control spring (19), spring seat (14), spring stop (20), screw (21), armature (22), spool (15) is hollow step axis body; Be fitted in the valve opening (H) in the pump platform (5), the bottom has the disc type seam, stretches out in the low pressure oil pocket (T) that is communicated with valve opening (H); Spool (15) top endoporus installing screw (21); Armature (22) is fixed on spool (15) top, is movably arranged in the mesopore of dividing plate (3), spring stop (20) is fixed on the joint of dividing plate (3) mesopore and valve opening (H); Spool (15) epimere movable set is in spring stop (20) mesopore; The outer suit control spring of spool (15) (19), the top conflict spring stop (20) of control spring (19), the bottom is fixed on the spring seat (14); Spring seat (14) is located at the bottom of valve opening (H) top macropore; Be fastened on the step draw-in groove in spool (15) stage casing, spool (15) hypomere external cylindrical surface has the ring-type shallow slot, is communicated with high pressure oilhole (Y) axial in the pump platform (5).

3. according to the described automatically controlled single cylinder fuel injection pump of claim 1, it is characterized in that described guide sleeve (10) is a cylindrical shell, the middle part of housing has radially relative cinclides (J), and the upper and lower has circular groove, installing jump ring (X) in the circular groove.

4. according to the described automatically controlled single cylinder fuel injection pump of claim 1; It is characterized in that having interlayer in the middle of the described tappet body (8); The top has circular blind hole (W), and the bottom is for having the roller chamber (U) of cross through hole (G), the end of equipped plunger (18) and piston spring (17) in the blind hole on top (W); The roller (9) of suit bearing pin (Z) is set, the end of the equipped bearing pin (Z) of cross through hole (G) in the roller chamber (U) of bottom.

5. according to the described automatically controlled single cylinder fuel injection pump of claim 1; It is characterized in that having in the low pressure oil pocket (T) of described pump platform (5) bottom the aperture of inclined oil hole of air (V), inclined oil hole of air (V) is connected with the oil supply hole of installing fuel feeding bolt (6) pump platform (5) in.

6. according to the described automatically controlled single cylinder fuel injection pump of claim 1; The ECU (27) that it is characterized in that described control system can be installed in the operator cabin; Electronic throttle sensor (25) is connected as a single entity with gas pedal; Cooling-water temperature transmitter (32) is installed on the diesel coolant pipe; Crankshaft rotational speed sensor (33) is installed near the support plate the diesel engine flywheel, and each sensor connects ECU (27) through signaling line (26), and ECU (27) connects electromagnet (1) through power transmission line (31).

Images