TWI421407B - Fuel nozzle improved structure - Google Patents

Description

Fuel nozzle improved structure

The present invention relates to a fuel nozzle, and more particularly to a fuel nozzle suitable for use in a vehicle.

Nowadays, whether it is a car or a locomotive, there is a possibility of configuring a fuel injection system. This system supplies various mixed oils of different concentrations to suit different vehicle operating conditions. For example, when the engine is cold-started, the system will deliver concentrated mixed oil and gas, and after the engine is warmed up, it will send out lean mixed oil and gas. The fuel injection system mainly comprises an oil pump and a fuel nozzle. The oil pump sends the fuel to the nozzle, and the solenoid valve in the nozzle is controlled by a controller to open and close, thereby determining the timing and amount of fuel injection.

Refer to Figures 1 and 2. The conventional fuel nozzle 90 is mainly composed of a nozzle body 91 and a nozzle cover 92. A fuel passage 93 is formed in the nozzle cover 92 to receive fuel from the oil pump. The nozzle body 91 includes an oil storage chamber 94 for storing oil. A solenoid valve 95 is disposed below the chamber 94. The coil 951 of the solenoid valve 95 is electrically connected to the electrical connection seat 96 disposed on the outer surface of the nozzle body 91.

When the nozzle cover 92 is assembled and coupled to the nozzle body 91 and the fuel begins to circulate, as shown, since the fuel passage outlet 931 of the conventional fuel nozzle 90 is located in the cover space S of the cap nozzle cover 92, the fuel is fueled. After the passage 93 exits, it flows through the inner space S of the cover and the oil storage chamber 94 in sequence. Under this space configuration, it is easy to have air remaining in the inner space S of the cover, and thus the shortcoming of the vehicle starting time is too long.

The fuel nozzle improved structure of the present invention comprises a nozzle body and a nozzle cover body, wherein the nozzle body comprises an oil storage chamber, and the nozzle cover body comprises a fuel passage. In particular, the outlet of the fuel passage is located in the oil storage chamber, and the fuel passage is an equal diameter passage.

With the above structural design, the fuel from the oil pump is directly sent into the oil storage chamber, and the residual air in the pipeline is smoothly discharged out of the fuel injector by the fuel pressure, and does not accumulate in the nozzle cover body, thereby improving the disadvantage that the vehicle is not easy to start.

The nozzle cover body further includes a fixing portion, and a sealing ring is interposed between the fixing portion and the nozzle body to avoid leakage of fuel. The fixing portion may be cap-shaped and surround a part of the fuel passage. The fixing portion can further define a cover chamber, and the fuel passage extends out of the cover chamber.

A solenoid valve may be arranged in the nozzle body as a means for controlling fuel injection. The solenoid valve may include a coil, an elastic member, and an induction needle, wherein the coil surrounds the induction needle, the elastic member abuts against the induction needle, and the induction needle selectively connects the outlet of the nozzle body with the oil storage chamber, and when the coil is energized, according to the electromagnetic The induction principle causes the induction to be displaced according to the force, thereby opening or closing the outlet of the nozzle body.

The solenoid valve can be electrically connected to and controlled by an electronic control unit, and the electronic control unit can be electrically connected to a sensor group for detecting a vehicle condition, such as a crankshaft speed sensor and a throttle. One or a combination of two or more of a position sensor, a manifold vacuum sensor, an air inlet temperature sensor, an exhaust oxygen sensor, and the like. Thereby, the fuel injection amount required by the vehicle is accurately and instantly detected, so that the electronic control unit appropriately controls the fuel discharge state of the fuel nozzle.

Refer to Figures 3 and 4. The figure shows a fuel injection system for a locomotive comprising a fuel nozzle 10, an oil pump 20, a sensor group 21, and an electronic control unit 22. The fuel nozzle 10 is mainly composed of a nozzle body 11 and a nozzle cover 12.

An oil storage chamber 111 is dug inside the nozzle body 11, and a solenoid valve 13 is disposed below the oil storage chamber 111. The solenoid valve 13 mainly includes a coil 131, an elastic member 132, and an induction needle 133. The coil 131 surrounds the induction needle 133. The two ends of the elastic member 132 abut against the inner surface of the induction needle 133 and the nozzle body 11 respectively to provide an elastic force. Pre-force. The induction pin 133 is electromagnetically induced and displaced according to the energization of the coil, and thus can be used to selectively connect the outlet 114 of the nozzle body 11 with the oil reservoir 111.

The nozzle body 11 further includes an electrical connector 113. One of the electrical control units 22 is inserted into the electrical connector 113 to provide power to the coil 131 of the solenoid valve 13. The electronic control unit 22 is electrically connected to a sensor group 21, which includes a plurality of sensors such as a crankshaft speed sensor, a throttle position sensor, a manifold vacuum sensor, an air inlet temperature sensor, and an exhaust oxygen gas. A combination of perceptrons, etc. The electronic control unit 22 controls the opening and closing of the solenoid valve 13 according to the information returned by each sensor (that is, the selection mode energizes the coil 131), thereby determining the fuel injection amount of the fuel nozzle 10, and providing the optimal air-fuel ratio to mix and match the oil and gas to the vehicle engine. .

The nozzle cover 12 has a cap-shaped annular wall as a fixing portion 125 coupled to the nozzle body 11, and the fixing portion 125 defines a cover chamber 122. The nozzle cover 12 is provided with a fuel passage 121 of equal diameter. A portion of the fuel passage 121 is surrounded by the fixing portion 125, and an outlet 123 of the fuel passage 121 extends out of the cover chamber 122, that is, through the opening 124 of the cover chamber 122. An inlet pipe 126 of the fuel passage 121 is provided with an oil delivery pipe 23 for receiving fuel from the oil pump 20.

When the nozzle cover 12 is coupled to the nozzle body 11, a sealing ring 24 is interposed between the fixing portion 125 of the nozzle cover 12 and the nozzle body 11, and the outlet 123 of the fuel passage 121 is inserted into the opening 112 of the oil storage chamber 111. It extends into the oil storage chamber 111.

It can be seen from the above that the fuel is forced to be sent out from the oil pump 20 and then enters the fuel passage 121 through the oil delivery pipe 23, and then directly enters the oil storage chamber 111 of the nozzle body 11. Since the fuel passage 121 is directly installed in the oil storage chamber 111 of the nozzle body 11, the fuel passes through The space of the nozzle cover 12 is reduced compared to the conventional design, the air can be almost forced out by the fuel, and the residual air is greatly reduced, which improves the problem that the engine startup time is too long.

The above-mentioned embodiments are merely examples for convenience of description, and the scope of the claims is intended to be limited to the above embodiments.

90‧‧‧ fuel nozzle

91‧‧‧Nozzle body

92‧‧‧Nozzle cover

93‧‧‧Fuel passage

931‧‧‧ fuel passage exit

94‧‧‧ oil storage room

95‧‧‧ solenoid valve

951‧‧‧ coil

96‧‧‧Electrical connector

S‧‧‧ Gaine Space

10‧‧‧ fuel nozzle

11‧‧‧Nozzle body

111‧‧‧ oil storage room

112‧‧‧ Oil storage chamber opening

113‧‧‧Electrical connector

114‧‧‧Nozzle body outlet

12‧‧‧Nozzle cover

121‧‧‧ fuel passage

122‧‧‧ Covering room

123‧‧‧ fuel passage exit

124‧‧‧ Cover opening

125‧‧‧Fixed Department

126‧‧‧ fuel passage entrance

13‧‧‧ solenoid valve

131‧‧‧ coil

132‧‧‧Flexible parts

133‧‧‧Induction needle

20‧‧‧ oil pump

21‧‧‧Sensor group

22‧‧‧Electronic Control Unit

221‧‧‧Electrical connector

23‧‧‧ Oil pipeline

24‧‧‧Seal ring

Figure 1 is an exploded view of a conventional fuel nozzle.

Figure 2 is an assembled cross-sectional view of Figure 1.

Figure 3 is an exploded view of a fuel injection system in accordance with a preferred embodiment of the present invention.

Figure 4 is a cross-sectional view showing the assembly of the fuel nozzle of Figure 3.

11. . . Nozzle body

111. . . Oil storage room

114. . . Nozzle body outlet

12. . . Nozzle cover

121. . . Fuel passage

122. . . Cover room

123. . . Fuel passage outlet

125. . . Fixed part

13. . . The electromagnetic valve

131. . . Coil

132. . . Elastic part

133. . . Induction needle

twenty four. . . Sealing ring

Claims (4)

The fuel nozzle improved structure comprises: a nozzle body comprising an oil storage chamber, the nozzle body is provided with a solenoid valve; and a nozzle cover body comprising a fuel passage and a fixing portion, the fixing portion and the nozzle A sealing ring is disposed between the bodies, the fixing portion is cap-shaped and surrounds a portion of the fuel passage, and the fixing portion defines a cover chamber, the fuel passage extends out of the cover chamber; and the fuel passage is characterized by: The outlet is located in the oil storage chamber, and the fuel passage is an equal diameter passage. The fuel nozzle improved structure of claim 1, wherein the solenoid valve comprises a coil, an elastic member, and an induction needle, the coil surrounds the induction needle, and the elastic member abuts the induction needle. The sensing pin selectively communicates with the outlet of the nozzle body and the oil storage chamber. The fuel nozzle improved structure of claim 1, wherein the electromagnetic valve is electrically connected to an electronic control unit. The fuel nozzle improved structure of claim 1, wherein the electronic control unit is electrically connected to a sensor group.