Methanol fuel supply pipeline system

Abstract

The invention discloses a methanol fuel supply pipeline system, which relates to a methanol engine injection system and comprises a common rail pipe and a nozzle. A connecting block I is mounted on the common rail pipe, and a methanol inlet communicated with the common rail pipe is formed in one side of the connecting block I; output connectors with the same number as the nozzles are arranged on one side of the common rail pipe, sealing sleeves are arranged on the peripheries of the nozzles, the sealing sleeves wrap the input ends of the nozzles and seal the nozzles, the sealing sleeves are installed on an air inlet pipe of an engine, and the output ends of the nozzles extend into the air inlet pipe of the engine; the output connector communicates with the sealing sleeve through a connecting pipe, and an oil return pipe is installed on one side of the sealing sleeve. The risk of methanol leakage is greatly reduced, and potential safety hazards caused by methanol leakage are avoided.

Description

Technical Field

[0001] The present invention relates to a methanol engine injection system, and more particularly to a methanol fuel supply pipeline system. Background Art

[0002] A methanol engine is an engine that uses methanol as fuel. It achieves combustion by injecting methanol into the intake manifold. Compared with traditional gasoline engines, methanol engines have the following characteristics: methanol has a higher energy density than gasoline and can provide higher power output; the products of methanol combustion are mainly carbon dioxide and water, which has less pollution to the environment; methanol is a renewable energy source and can reduce fuel costs.

[0003] The methanol supply structure of the traditional methanol engine is to send methanol to the common rail pipe, and then the common rail pipe distributes the methanol to the nozzles of each cylinder of the engine. The nozzles are installed on the corresponding intake pipes of each cylinder, so that the methanol is mixed with air and enters each cylinder. However, compared with traditional gasoline and diesel, methanol is more volatile and toxic. If a leak occurs, these methanol are very easy to volatilize, which will cause environmental pollution and pose a greater safety risk. The traditional methanol supply structure mostly reduces the risk of methanol leakage by enhancing the sealing of the connection between the nozzle and the pipeline and the intake pipe. However, when the methanol pressure in the common rail pipe is too high, which also causes the pressure at the nozzle to be too high, the problem of methanol leakage caused by the poor sealing of the connection cannot be avoided during long-term use. Therefore, the traditional methanol supply structure still has a greater risk of methanol leakage. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a methanol fuel supply pipeline system in view of the deficiencies of the prior art, which greatly reduces the risk of methanol leakage.

[0005] A methanol fuel supply pipeline system described in the present invention comprises a common rail pipe and a nozzle; a connecting block 1 is installed on the common rail pipe, and a methanol inlet connected to the common rail pipe is opened on one side of the connecting block; output joints consistent with the number of nozzles are provided on one side of the common rail pipe, and a sealing sleeve is provided on the periphery of the nozzle, and the sealing sleeve wraps the input end of the nozzle and forms a seal for the nozzle, the sealing sleeve is installed on the intake pipe of the engine, and the output end of the nozzle extends into the intake pipe of the engine; the output joint is connected to the sealing sleeve through a connecting pipe, and an oil return pipe is installed on one side of the sealing sleeve, and the oil return pipe is connected to the methanol fuel supply device of the engine through an oil return structure.

[0006] As a further improvement, the oil return structure includes a methanol collection box; the oil return pipe is connected to the methanol collection box.

[0007] Furthermore, a methanol oil return interface is provided on one side of the methanol collection box, and an electronic pressure regulating valve is installed in the methanol oil return interface.

[0008] Furthermore, the oil return pipe is connected to the methanol collection tank through a collecting pipe, and a one-way valve is installed in the collecting pipe.

[0009] Furthermore, a connecting block 2 is installed at the end of the common rail pipe, a vent is opened in the connecting block 2, the vent is connected to the common rail pipe, a ventilation pipe is installed on the vent, and a control valve is installed in the ventilation pipe; the vent, the common rail pipe and the connecting pipe constitute a ventilation and exhaust structure for the sealing sleeve, which is used to extract methanol gas in the methanol fuel supply pipeline system.

[0010] Furthermore, the ventilation opening is opened above the second connecting block.

[0011] Furthermore, a mounting hole connected to the common rail pipe is opened on one side of the connecting block 2, the pressure sensor is installed in the mounting hole, and the detection end of the pressure sensor extends into the common rail pipe.

[0012] Beneficial Effects

[0013] The advantages of the present invention are:

[0014] 1. A sealing sleeve is arranged on the periphery of the nozzle, and an oil return pipe is arranged on the sealing sleeve. The common rail pipe, the sealing sleeve and the methanol collection box are connected to supply oil and return oil to the nozzle, so as to actively recover the methanol. Moreover, the pressure of the methanol in the common rail pipe and the sealing sleeve can be ensured by controlling the electronic pressure regulating valve, thereby greatly reducing the risk of methanol leakage and avoiding the problem of methanol leakage at the nozzle due to excessive pressure at the input end.

[0015] 2. A vent is provided on the connecting block 2 to extract the methanol gas in the common rail pipe and the sealing sleeve, thereby avoiding the problem that the methanol gas in the methanol fuel supply pipeline system affects the subsequent start-up of the engine, and also avoiding the safety hazard caused by the leakage of methanol gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the methanol fuel supply pipeline system of the present invention;

[0017] Figure 2 A schematic diagram of the working process of the methanol fuel supply pipeline system of the present invention;

[0018] Figure 3 It is a schematic diagram of the internal structure of the sealing sleeve of the present invention.

[0019] Among them: 101-common rail pipe, 102-connecting block one, 103-methanol inlet, 104-output connector, 105-connecting block two, 106-vent, 107-pressure sensor, 108-return oil pipe, 109-sealing sleeve, 110-nozzle, 111-electronic pressure regulating valve, 112-methanol return oil interface, 113-methanol collection box, 114-collecting pipe, 115-connecting pipe, 201-methanol input port, 202-methanol through hole, 203-pressure relief port, 204-nozzle installation port, 205-vent one, 206-vent two. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the embodiments, but it does not constitute any limitation to the present invention. Any limited number of modifications made by anyone within the scope of the claims of the present invention are still within the scope of the claims of the present invention.

[0021] See also Figure 1-Figure 3 A methanol fuel supply pipeline system of the present invention comprises a common rail pipe 101 and a nozzle 110. In this embodiment, a 6-cylinder engine is taken as an example. A connection block 102 is installed on the common rail pipe 101, and one side of the common rail pipe 101 is provided with output connectors 104 that are the same in number as the nozzles 110, that is, 6 output connectors 104. A methanol inlet 103 connected to the common rail pipe 101 is provided on one side of the connection block 102, which is used to transport methanol to the common rail pipe 101. The connection block 102 is arranged in the middle position of the common rail pipe 101, and the 6 output connectors 104 are evenly divided on both sides. Such an arrangement can effectively improve the uniformity of the methanol transported to each position in the common rail pipe 101, reduce the problem of uneven amount of methanol sprayed by the nozzle 110 due to uneven distribution of methanol in the common rail pipe 101, and play a role in ensuring stable operation of the engine.

[0022] The nozzle 110 is provided with a sealing sleeve 109 at its periphery, which is mounted on the intake pipe, and the sealing sleeve 109 wraps the input end of the nozzle 110 and forms a seal for the nozzle. The setting of the sealing sleeve 109 can protect the nozzle 110, and is also used for the transfer of methanol, that is, the methanol is transported to the sealing sleeve 109 and then enters the nozzle 110 or is discharged through the pressure relief port 203. The sealing sleeve 109 is mounted on the intake pipe of the engine, and the output end of the nozzle 110 extends into the intake pipe of the engine. The output connector 104 is connected to the sealing sleeve 109 through the connecting pipe 115. The oil return pipe 108 is installed on one side of the sealing sleeve 109, so that the methanol is injected into the intake pipe. Among them, the setting of the sealing sleeve 109 forms a wrapping of the nozzle input end, forms a closure of the connection between the nozzle 110 and the intake pipe, and reduces the risk of methanol leaking out. At the same time, the return oil pipe 108 is provided to actively recover leaked methanol or excess methanol through the return oil pipe 108, thereby greatly reducing the risk of methanol leakage. At the same time, the pressure at the input end of the nozzle 110 is ensured to avoid the problem of excessive input pressure causing easy leakage of methanol at the nozzle.

[0023] Specifically, the internal structure of the sealing sleeve 109 is as follows: Figure 3 As shown. Figure 3 It can be seen that the sealing sleeve 109 is mainly provided with a methanol input port 201, a methanol through hole 202, a pressure relief port 203 and a nozzle installation port 204. Among them, the connecting pipe 115 is screwed into the methanol input port 201, and the methanol input port 201 is used to input methanol of the common rail pipe 101; the nozzle 110 is screwed into the nozzle installation port 204, and its input end is inside the sealing sleeve 109, and the output end is located outside the sealing sleeve 109; the methanol through hole 202 is connected with the methanol input port 201 and the nozzle installation port 204, and is used to transport methanol to the input end of the nozzle 110; the end of the return oil pipe 108 is screwed into the pressure relief port 203, and is used to discharge methanol, or discharge excess methanol to ensure the pressure of methanol in the sealing sleeve 109. Thus, the sealing of the nozzle 110 is achieved, and the risk of methanol leakage is reduced by actively discharging leakage and excess methanol.

[0024] In order to better recycle methanol, the oil return structure of this embodiment includes a methanol collection box 113. The oil return pipe 108 is connected to the methanol collection box 113 through a header 114, and a one-way valve is installed in the header 114 to achieve methanol recovery. Moreover, the one-way valve is arranged in the header 114 to prevent the methanol in the methanol collection box 113 from flowing back into the sealing sleeve 109, which is safer and more reliable.

[0025] In addition, a methanol oil return interface 112 is provided on one side of the methanol collection tank 113, which is used to discharge the methanol in the methanol collection tank 113 and recycle it into the methanol storage. An electronic pressure regulating valve 111 is installed in the methanol oil return interface 112, which is used to control the discharge of methanol in the methanol collection tank 113. A pressure sensor 107 is installed in the common rail pipe 101, which is used to check the pressure in the common rail pipe 101. Moreover, the pressure sensor 107 is set in linkage with the electronic pressure regulating valve 111, that is, the pressure sensor 107 transmits the rail pressure data of the common rail pipe 101 to the ECU. When the ECU detects that the pressure in the common rail pipe 101 is greater than the set target value, the methanol can be refluxed by controlling the electronic pressure regulating valve 111 to open, thereby realizing rapid pressure release to control the rail pressure, and achieving the effect of stabilizing the rail pressure and the pressure in the sealing sleeve 109.

[0026] In this embodiment, a mounting hole connected to the common rail pipe 101 is opened on one side of the connecting block 105, and the pressure sensor 107 is installed in the mounting hole, and the detection end of the pressure sensor 107 extends into the common rail pipe 101, which is not only convenient for installation, but also does not require an opening on the common rail pipe 101.

[0027] When the engine is not working, the remaining methanol liquid in the methanol fuel supply pipeline system will volatilize and become gas, and these gases will cause the internal pressure of the methanol fuel supply pipeline system to be too large, which is not conducive to the subsequent start of the engine. To solve this problem, a vent 106 is provided in the connection block 105 of the present embodiment, and the vent 106 is provided above the connection block 105, which is convenient for extracting methanol gas. The vent 106 is connected to the common rail pipe 101, and a vent pipe is installed on the vent 106, and a control valve is installed in the vent pipe, and a gas collecting device is provided at its end. The vent 106, the common rail pipe 101, and the connecting pipe 115 constitute a ventilation and exhaust structure for the sealing sleeve 109, which is used for extracting the methanol gas in the methanol fuel supply pipeline system, so that the methanol gas in the methanol fuel supply pipeline system can be discharged.

[0028] In order to discharge the methanol gas in the sealing sleeve 109 smoothly, the present embodiment further provides an outer ventilation structure composed of a vent hole 1 205 and two vent holes 206 in the sealing sleeve 109 , which is beneficial to improving the fluidity of the air in the sealing sleeve 109 .

[0029] The working principle of the present invention is: when the engine is working, methanol enters the common rail pipe 101 through the methanol inlet 103 on the connecting block 102, and then the methanol is transported to the output joint 104, and the methanol is input into the sealing sleeve 109 through the connecting pipe 115. At the same time, when the engine is started and the fuel is supplied, part of the methanol also flows into the methanol collection tank 113 through the return oil pipe 108 and the collecting pipe 114. The pressure sensor 107 transmits the rail pressure data of the common rail pipe 101 to the ECU. When the ECU detects that the pressure in the common rail pipe 101 is too high, the electronic pressure regulating valve 111 can be controlled to open to allow the methanol in the common rail pipe 101 and the sealing sleeve 109 to flow back to the methanol storage through the methanol collection tank 113, thereby realizing rapid pressure release to control the stability of the rail pressure. When the engine stops working, the vent 106 is evacuated to extract the methanol gas in the common rail pipe 101 and the sealing sleeve 109, thereby avoiding the problem of the methanol gas in the methanol fuel supply pipeline system affecting the subsequent start-up of the engine, and also avoiding the safety hazard caused by the leakage of methanol gas.

[0030] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A methanol fuel supply pipeline system, comprising a common rail pipe (101) and a nozzle (110); characterized in that: A connecting block (102) is installed on the common rail pipe (101), and a methanol inlet (103) connected to the common rail pipe (101) is opened on one side of the connecting block (102); output joints (104) are provided on one side of the common rail pipe (101) and the number of the same as the number of the nozzles (110); a sealing sleeve (109) is provided on the periphery of the nozzle (110), and the sealing sleeve (109) wraps the input end of the nozzle (110) and forms a seal for the nozzle; the sealing sleeve (109) is installed on the intake pipe of the engine, and the output end of the nozzle (110) extends into the intake pipe of the engine; the output joint (104) is connected to the sealing sleeve (109) through a connecting pipe (115); an oil return pipe (108) is installed on one side of the sealing sleeve (109), and the oil return pipe (108) is connected to a methanol fuel supply device of the engine through an oil return structure.

2. A methanol fuel supply pipeline system according to claim 1, characterized in that: The oil return structure comprises a methanol collection box (113); the oil return pipe (108) is connected to the methanol collection box (113).

3. A methanol fuel supply pipeline system according to claim 2, characterized in that: A methanol oil return interface (112) is provided on one side of the methanol collection box (113), and an electronic pressure regulating valve (111) is installed in the methanol oil return interface (112).

4. A methanol fuel supply pipeline system according to claim 2, characterized in that: The oil return pipe (108) is connected to the methanol collection tank (113) through a header pipe (114), and a one-way valve is installed in the header pipe (114).

5. A methanol fuel supply pipeline system according to claim 2, characterized in that: A second connection block (105) is installed at the end of the common rail pipe, a vent (106) is provided in the second connection block (105), the vent (106) is connected to the common rail pipe (101), a vent pipe is installed on the vent (106), and a control valve is installed in the vent pipe; the vent (106), the common rail pipe (101) and the connection pipe (115) form a ventilation and exhaust structure for the sealing sleeve (109), which is used to extract methanol gas in the methanol fuel supply pipeline system.

6. A methanol fuel supply pipeline system according to claim 4, characterized in that: The ventilation opening (106) is opened above the second connecting block (105).

7. A methanol fuel supply pipeline system according to claim 5, characterized in that: A mounting hole communicating with the common rail pipe (101) is provided on one side of the second connection block (105), the pressure sensor (107) is mounted in the mounting hole, and the detection end of the pressure sensor (107) extends into the common rail pipe (101).

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