CN2495825Y - Electrically controlled fuel oil pump - Google Patents

Abstract

The utility model relates to an electrically controlled fuel oil pump suitable for the automobiles, which comprises an oil inlet cavity (1), an oil outlet cavity (2) and a diaphragm (3) and an electromagnetic power component consisting of an electromagnetic coil (4), an iron core (5) and a mandril (6). The lower end of the mandril (6) is riveted with the diaphragm (3) of the pump body and the iron core is arranged at the middle and lower part of the mandril (6). A release spring (7) is arranged between the diaphragm (3) and the iron core (5) and the upper end of the mandril (6) penetrates the electromagnetic coil (4) and is arranged close to the light path of a sensor (9) of an electronic switch (8). The electronic switch comprises a base plate (12), the sensor (9), a monostable delay integrated package (10) and a switching tube (11). Compared with the electric diaphragm pump, the utility model has no mechanical contacts, causes few noises, causes no voltaic arc when the power is connected and disconnected, has long service life, has high reliability, small size and small weight because the electronic switch is adopted to replace the mechanical contact switch.

Description

A kind of electronic controlled fuel pump

(1) technical field

The utility model relates to a kind of electronic controlled fuel pump that is applicable to automobile.

(2) background technique

At present, domestic and international many automobiles all adopt contact type Electromagnetic Drive electric fuel pump, to avoid mechanical gasoline pump incidental " vapour lock " phenomenon.Though electric fuel pump has many advantages than mechanical gasoline pump,, therefore when work, will produce electric arc and electromagnetic interference, poor reliability because the power on/off of electromagnetic coil is finished by mechanical contact fully; Because the generation of electric arc, the contact very easily burns out, and influences working life.Although can take measures to alleviate the generation of electric arc, but still to certain influence is arranged working life, and the noise that produces can not avoid power on/off the time.Also there are some automobiles to adopt the transistor plunger type fuel pump, though flexible for installation, be difficult for producing " vapour lock ", loss is big, and low-pressure performance is bad.

(3) summary of the invention

The purpose of this utility model is to change mechanical contact into electronic switch at the deficiency of prior art existence, provides a kind of volume little, in light weight, and noise is little, reliability height, a kind of electronic controlled fuel pump of long service life.

The purpose of this utility model is achieved through the following technical solutions: a kind of electronic controlled fuel pump, comprise by oil suction chamber, go out the pump housing that oil pocket and diaphragm constitute, the electromagnetic power assembly that constitutes by electromagnetic coil, iron core and push rod, the lower end of push rod and the riveted joint of the diaphragm of the pump housing, iron core is contained in the middle and lower part of push rod, between diaphragm and iron core, return spring is installed, it is characterized in that passing electromagnetic coil on the push rod, and the light path of the sensor on the close electronic switch; Electronic switch is made up of substrate, sensor, monostable time delay integrated package and switching tube, and switching tube is connected with the VMOS pipe and with electromagnetic coil; Sensor is made up of an infrared emission tube and an infrared receiver tube.

The utility model is compared with electronic diaphragm pump, owing to adopt electronic switch to substitute mechanical contact switch, does not have mechanical contact, and noise is little, does not produce electric arc during power on/off, long service life, and the reliability height, and volume is little, and in light weight.

(4) description of drawings

Fig. 1 is a tectonic maps of the present utility model.

Fig. 2 is the structural representation of electronic switch.

Fig. 3 is the circuit theory diagrams of electronic switch.

(5) embodiment

Below in conjunction with accompanying drawing structure of the present utility model is further described: the utility model by oil suction chamber 1, go out oil pocket 2 and diaphragm 3 constitutes the pump housing, constitute the electromagnetic power assembly by electromagnetic coil 4, iron core 5 and push rod 6, the lower end of push rod 6 and 3 riveted joints of the diaphragm of the pump housing, iron core 5 is contained in the middle and lower part of push rod 6, between diaphragm 3 and iron core 5, return spring 7 is installed, it is characterized in that push rod 6 upper ends pass electromagnetic coil 4, and near the light path of the sensor 9 on the electronic switch 8; Electronic switch 8 is made up of substrate 12, sensor 9, monostable time delay integrated package 10 and switching tube 11.Switching tube 11 is connected with electromagnetic coil 4.Before the energising, push rod 6 is in lower dead center, after the energising, the light path of the sensor 9 on the electronic switch 8 is unimpeded, switching tube 11 conductings, ON time is by 10 controls of monostable time delay integrated package, after electromagnetic coil 4 energising, iron core 5 is subjected to electromagnetic force upwards, drives the push rod 6 arrival top dead center that moves up, diaphragm 3 also moves up, and makes oil suction chamber 1 inspiration gasoline; Push rod 6 moves up and interdicts the light path of sensor 9, switching tube 11 ends, deadline is by 10 controls of monostable time delay integrated package, make electromagnetic coil 4 delay cut-offs, electromagnetic force disappears, and iron core 5 is subjected to the downward pulling force of return spring 7, gets back to lower dead center, diaphragm 3 moves down under the effect of return spring 7, uses oil pocket 2 and discharges gasoline; At this moment, the light path of the sensor 9 on the electronic switch 8 is unimpeded again, and fuel pump repeats oil suction, oil extraction process again, so moves in circles, and constantly gasoline is sent into Carburetor, to engine oil.

Claims (3)

1, a kind of electronic controlled fuel pump, comprise by oil suction chamber (1), go out the pump housing that oil pocket (2) and diaphragm (3) constitute, by electromagnetic coil (4), the electromagnetic power assembly that iron core (5) and push rod (6) constitute, diaphragm (3) riveted joint of the lower end of push rod (6) and the pump housing, iron core (5) is contained in the middle and lower part of push rod (6), between diaphragm (3) and iron core (5), return spring (7) is installed, it is characterized in that push rod (6) top passes electromagnetic coil (4), electromagnetic coil (4) top is provided with electronics beginning (8), and push rod (6) top is near sensor (9) emission tube on the electronic switch (8) and the light path between the receiving tube.

2, a kind of electronic controlled fuel pump according to claim 1, it is characterized in that electronic switch (8) is made up of substrate (12), sensor (9), monostable time delay integrated package (10) and switching tube (11), sensor (9), monostable time delay integrated package (10) and switching tube (11) are fixed on the substrate 12, sensor (9) produces light path and cut-offs signal and pass to monostable time delay integrated package (10) and carry out delay process and control switch pipe (11), and switching tube (11) is connected with electromagnetic coil (4).

3, a kind of electronic controlled fuel pump according to claim 1 and 2 is characterized in that sensor (9) only is made up of an infrared emission tube and an infrared receiver tube.

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