TW201534811A - Intake device having bypass line - Google Patents

Abstract

An intake device having a bypass line, includes a throttle body, a fuel injection nozzle, a bypass line and an idle control pipe. The throttle body accommodates a main throttle-slice and a secondary throttle-slice, where the two throttle-slices divide the throttle body into a front throttle body, a middle throttle body and a rear throttle body. The fuel injection nozzle is arranged on an intake passage of the cylinder head. An inlet and an outlet of the idle control pipe are communicated with the throttle body. The bypass inlet is communicated with the middle throttle body, and the bypass outlet is communicated with the intake passage and apart from an intake valve seat of the cylinder head a predetermined distance. Thereby, the air will incur turbulence on the air inside the cylinder head and thus result in a vortex effect. This will increase uniform distribution of atomization of air-fuel mixture such that the air-fuel mixture burns quickly and air pollution can be reduced.

Description

Air intake device with bypass line

The invention relates to an air intake device with a bypass pipeline, in particular to an air intake device with a bypass pipeline suitable for a locomotive engine.

In the engine design of a general locomotive, the design of the intake line and the interaction between the engines are extremely important. For example, when the engine is running at a slow speed or a low speed, the cross-sectional area of the intake line required is relatively high. Small and long, this can help to increase the gas flow rate in the intake line, and thus enhance the inertia and pulsation effects, thereby improving the intake efficiency and increasing the engine torque. Conversely, when the engine is running at a high speed or at a high speed, the required intake line has a large cross-sectional area and a short length, which can reduce the flow resistance, thereby facilitating the improvement of the intake efficiency and thereby improving the combustion process. Improve horsepower.

However, the design of the intake circuit of the general locomotive engine can only fix its cross-sectional area and length, so it can only meet one of the intake requirements of low-speed operation or high-speed operation, and cannot match the intake efficiency of the whole-speed. The requirement is that the running performance of another speed cannot be balanced.

In the design of the engine of a general motor vehicle such as a locomotive, Good engine combustion process to improve combustion efficiency, in addition to focusing on the engine intake and fuel injection from the injector evenly, on the other hand, also try to make the engine intake rotation, rolling motion. That is to say, the design of the engine generally allows the intake air to have a swirling effect, thereby further reducing the fuel consumption and achieving a lean combustion with low pollution.

In order to control the flow field of the intake structure at low load state. The conventional technical means is to change the geometry of the intake enthalpy or use a variable air intake mechanism to generate vortex and roll motion to achieve a combustion improvement effect. However, if a stronger vortex and tumbling motion is required, the intake enthalpy area needs to be narrowed again, but the high load area will be inoperable. Therefore, in order to overcome the above problems, the use of the bypass passage intake system makes the in-cylinder flow field more powerful and makes the combustion faster.

The familiar engine is to obtain higher horsepower, such as the Taiwan announcement Patent No. 264,527 provides an air intake system having a bypass air flow control valve, which is mainly used by a bypass passage of a smaller cross-sectional area beside the main air passage, and is matched by the opening of the main air passage valve and the bypass air passage valve. With proper control of the cooperation, under any load of high, medium and low engine, the intake air flow speed can be increased, and the vortex effect can be improved to obtain rapid combustion of the thin oil and achieve low pollution. However, because the side air passage is located on the intake pipe, it accelerates the intake air flow rate, and the effect of increasing the vortex is limited, which is not ideal.

In addition, the Taiwan Patent No. I238875 is also provided. An air intake system having a bypass air flow control valve, the bypass air passage being located between the intake port and the intake valve guide, the design of which makes the intake air flow The effect of speeding up and increasing the vortex is limited, and it is not very ideal. There is still room for improvement.

The reason for the inventor is that this is the spirit of active invention and creation. I think of a "passing device with a bypass line" that can solve the above problems, and finally completed the present invention after several research experiments.

The main object of the present invention is to provide a bypass line The air intake device can make the disturbance of the intake air flow in the cylinder more intense by designing the outlet position of the bypass passage closer to the intake valve seat, thereby improving the vortex effect, which can make the thin oil burn rapidly and achieve low pollution. The effect.

Another object of the present invention is to provide a bypass tube The air intake device of the road is disposed at the upstream and downstream of the throttle body by respectively connecting the inlet and the outlet of the idle control line, avoiding the chamber near the main throttle plate and the sub throttle plate. Reduce the pressure loss of the intake air flow.

In order to achieve the above object, the intake of the bypass line of the present invention The device is disposed between the cylinder head of the engine of the locomotive and the air cleaner, and the air intake device comprises: a throttle body, a fuel nozzle, a bypass pipe, and an idle control pipe.

Wherein, the throttle body body is provided with a main throttle valve piece and a pair of The throttle valve piece defines the throttle body with a front throttle body, a middle throttle body and a rear throttle body, and the rear throttle body is connected to the cylinder head of the engine. The front throttle body is in communication with the air cleaner. The injector assembly is located adjacent to one of the intake ports of the cylinder head of the engine. Bypass The tube includes a bypass inlet and a bypass outlet, the bypass inlet is in communication with the intermediate throttle body, the bypass outlet is in communication with the intake port of the engine, and a predetermined distance from the intake valve seat of the cylinder head Inside. The idle control pipeline includes an idle control pipeline inlet and an idle control pipeline outlet connected to the throttle body, and an idle speed control valve is disposed in the idle control pipeline.

Thereby, the present invention further designs the position of the bypass passage outlet The near-intake valve seat can make the disturbance of the intake air flow in the cylinder more intense, which can increase the kinetic energy, distribute the atomized fuel more evenly, and burn the fuel faster, thereby improving the stability of the engine and also improving the vortex. The effect can make the thin oil burn quickly and achieve the effect of low pollution.

The above-mentioned bypass pipe outlet can be located in one of the cylinder heads of the engine. The air is vented to 2/3 of the intake valve seat, that is, the closer the bypass pipe outlet is to the intake valve seat, the more the disturbance of the intake air flow in the cylinder is stronger, and the vortex effect is improved.

The axial center line of the above outlet of the bypass pipe and the cylinder of the engine The angle between the center line of the head can be less than 60 degrees, which can make the disturbance of the intake air flow in the cylinder more intense, thereby improving the vortex effect.

The above idle control line inlet can be connected to the front throttle body The outlet of the idle control line is connected to the rear throttle body to avoid the chamber near the main throttle plate and the secondary throttle plate, thereby reducing the pressure loss of the intake air flow.

The above idle speed control valve can be a solenoid valve or other equivalent work Can control the valve components.

10‧‧‧ engine

11‧‧‧Cylinder head

111‧‧‧ Inlet

112‧‧‧Intake valve seat

113‧‧‧Intake 埠

20‧‧‧ throttle body

21‧‧‧ front throttle body

22‧‧‧中 throttle body

23‧‧‧ rear throttle body

25‧‧‧Main throttle valve

27‧‧‧Secondary throttle valve

29‧‧‧Idle speed control line

291‧‧‧Idle speed control line inlet

292‧‧‧Idle speed control line outlet

293‧‧‧Idle speed control valve

30‧‧‧bypass

301‧‧‧ Bypass inlet

302‧‧‧ Bypass outlet

32‧‧‧Injector

40‧‧‧Air filter

Θ‧‧‧ angle

1 is a schematic view of a preferred embodiment of the present invention.

2 is a partial cross-sectional view showing a preferred embodiment of the present invention.

Figure 3 is a graph of fuel consumption improvement in accordance with a preferred embodiment of the present invention.

Please refer to FIG. 1 and FIG. 2 , which are respectively a preferred embodiment of the present invention. A schematic diagram and a partial cross-sectional view of an example. The air intake device with the bypass line of the embodiment is disposed between a cylinder head 11 of an engine 10 of an locomotive and an air cleaner 40. The air intake device includes: a throttle body 20. An injector 32, a bypass 30, and an idle control line 29.

As shown in FIG. 1, the throttle body 20 is provided with a main throttle valve. a piece 25 and a pair of throttle plates 27, the two throttle plates 25, 27 respectively define a throttle body 20 to connect one of the front throttle body 21, a middle throttle body 22 and a rear throttle body twenty three. The rear throttle body 23 communicates with the cylinder head 11 of the engine 10, and the front throttle body 21 communicates with the air cleaner 40. In addition, the fuel injector 32 is fixed to an intake port 111 adjacent to the cylinder head 11 of the engine 10.

The bypass pipe includes a bypass pipe inlet 301 and a bypass pipe outlet The port 302, the bypass pipe inlet 301 is in communication with the intermediate throttle body 22, and the bypass pipe outlet 302 is in communication with the intake port 111 and within a predetermined distance from the intake valve seat 112 of the cylinder head 11. In the present embodiment, the bypass pipe outlet 302 is located at 2/3 of the intake port 113 to the intake valve seat 112 of the cylinder head 11 of the engine 10, and the axial center line and the cylinder head of the bypass pipe outlet 302. The angle θ of the center line C of 11 is less than 60 degrees.

The idle control line 29 includes a communication with the throttle body 20 An idle control line inlet 291 and an idle control line outlet 292, and an idle speed control line 29 is provided with an idle speed control valve 293. In the present embodiment, the idle control line inlet 291 is in communication with the front throttle body 21, and the idle control line outlet 292 is in communication with the rear throttle body 23, and the idle control valve 293 is a solenoid valve.

Thereby, the position of the bypass pipe outlet 302 is adopted in this embodiment. The design is closer to the intake valve seat 112, so that the disturbance of the intake air flow in the cylinder of the engine 10 is more intense, thereby improving the vortex effect, which can make the thin oil burn quickly and achieve the effect of low pollution. In addition, the present embodiment also avoids the main throttle in the throttle body 20 by disposing the idle control line inlet 291 and the idle control line outlet 292 in the front throttle body 21 and the rear throttle body 23, respectively. The valve chamber 25 and the chamber in the vicinity of the sub throttle plate 27 can reduce the pressure loss of the intake air flow.

Please refer to FIG. 3 for improving fuel consumption according to a preferred embodiment of the present invention. Fig. 3, the horizontal axis of Fig. 3 refers to the fuel ratio (A/F), and the vertical axis refers to the fuel consumption rate (the number of kilometers that can be traveled per liter: Km/L), line A is the line of this embodiment, and line B It is a conventional air intake device having only a single throttle valve and a bypass line. It can be seen from the comparison between line A and line B that under the same conditions, when the fuel ratio (A/F) is 15 The line A of this embodiment is better than the conventional line B, and the fuel consumption rate (Km/L) can be improved by 17.4%, that is, the embodiment can save fuel by 17.4%. In addition, at different fuel ratios (A/F), line A of this embodiment is also more fuel efficient than conventional line B.

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.

10‧‧‧ engine

11‧‧‧Cylinder head

111‧‧‧ Inlet

112‧‧‧Intake valve seat

113‧‧‧Intake 埠

20‧‧‧ throttle body

21‧‧‧ front throttle body

22‧‧‧中 throttle body

23‧‧‧ rear throttle body

25‧‧‧Main throttle valve

27‧‧‧Secondary throttle valve

29‧‧‧Idle speed control line

291‧‧‧Idle speed control line inlet

292‧‧‧Idle speed control line outlet

293‧‧‧Idle speed control valve

30‧‧‧bypass

301‧‧‧ Bypass inlet

302‧‧‧ Bypass outlet

32‧‧‧Injector

40‧‧‧Air filter

Θ‧‧‧ angle

Claims (5)

An air intake device with a bypass line is disposed between a cylinder head of an engine of an locomotive and an air cleaner, and includes: a throttle body, the content of which is provided with a main throttle valve piece And a throttle valve piece, the two throttle valve pieces respectively define a throttle body, a middle throttle body and a rear throttle body, the rear throttle body and The cylinder head of the engine is in communication, the front throttle body is in communication with the air cleaner; a fuel injector is disposed adjacent to an intake port of the cylinder head; and a bypass pipe includes a bypass pipe inlet and a bypass outlet, the bypass inlet being in communication with the intermediate throttle body, the bypass outlet being in communication with the intake passage and within a predetermined distance from an intake valve seat of the cylinder head; An idle control pipeline includes an idle control pipeline inlet and an idle control pipeline outlet connected to the throttle body, and the idle control pipeline is provided with an idle control valve. The air intake device with a bypass line according to claim 1, wherein the bypass pipe outlet is located at one of the intake ports of the cylinder head to 2/3 of the intake valve seat. The air intake device with a bypass line according to claim 1, wherein an angle between an axial center line of the bypass pipe outlet and a center line of the cylinder head is less than 60 degrees. The air intake device with a bypass pipeline according to claim 1, wherein the idle control pipeline inlet is in communication with the front throttle body, and the idle control pipeline outlet is connected to the rear throttle body . The air intake device with a bypass line according to claim 1, wherein the idle speed control valve is a solenoid valve.