Water circulation heating structure for CNG vehicle type fuel gas injection rail

Abstract

The utility model discloses a water circulation heating structure for a CNG vehicle type fuel gas injection rail, and belongs to the technical field of automobiles. The problem that in the prior art, when a CNG vehicle type is started in a low-temperature environment, due to the fact that a gas channel of a gas injection rail is blocked by freezing in the gas injection rail, the gas state of the vehicle cannot be switched is solved. The device mainly comprises an engine cooling liquid circulation pipeline, a heat exchanger and a fuel gas injection rail, the heat exchanger comprises a shell, an inner cavity is formed in the shell, a heat exchanger liquid inlet and a heat exchanger liquid outlet which are communicated with the inner cavity are formed in the shell, and the shell is installed on the engine cooling liquid circulation pipeline through the heat exchanger liquid inlet and the heat exchanger liquid outlet. A shell of the heat exchanger is installed on a shell of the fuel gas injection rail.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobiles, and in particular relates to a water circulation heating structure for a CNG vehicle fuel injection rail. Background Art

[0002] When CNG models are started in low temperature environments, the vehicle sometimes cannot switch to gas mode, causing great inconvenience to the normal use of CNG models. One possible reason for this situation is that the water vapor generated by the combustion of CNG in the gas injection rail of the CNG model freezes and freezes in a low temperature environment. The ice blocks the airway of the gas injection rail, causing the vehicle to be unable to switch to gas mode. Summary of the invention

[0003] The utility model aims to provide a water circulation heating structure for a CNG vehicle gas injection rail, so as to overcome the problem in the prior art that when a CNG vehicle is started in a low temperature environment, the gas injection rail is blocked by ice forming inside the gas injection rail, causing the vehicle to be unable to switch to a gas state.

[0004] The utility model is realized by adopting the following technical scheme: a water circulation heating structure for a CNG vehicle gas injection rail, comprising an engine coolant circulation pipeline, a heat exchanger and a gas injection rail, wherein the heat exchanger comprises a shell, an inner cavity is arranged in the shell, a heat exchanger liquid inlet and a heat exchanger liquid outlet communicating with the inner cavity are arranged on the shell, the shell is installed on the engine coolant circulation pipeline through the heat exchanger liquid inlet and the heat exchanger liquid outlet, and the shell of the heat exchanger is installed on the outer shell of the gas injection rail.

[0005] Furthermore, the engine coolant circulation pipeline includes a front coolant circulation pipe and a rear coolant circulation pipe, the heat exchanger inlet is connected to the front coolant circulation pipe through the heat exchanger water inlet pipe, and the heat exchanger outlet is connected to the rear coolant circulation pipe through the heat exchanger water outlet pipe.

[0006] Furthermore, it also includes a pressure reducing valve installed on the engine coolant circulation pipeline, the heat exchanger outlet is connected to the pressure reducing valve inlet of the pressure reducing valve through the heat exchanger outlet pipe, the pressure reducing valve outlet of the pressure reducing valve is connected to the rear coolant circulation pipe, and the rear coolant circulation pipe is connected to the heat exchanger outlet pipe through the pressure reducing valve.

[0007] Furthermore, the heat exchanger water inlet pipe and the heat exchanger water outlet pipe are both made of EPDM material.

[0008] Furthermore, the heat exchanger water inlet pipe is connected to the heat exchanger liquid inlet of the shell through a steel belt type elastic hoop, and the heat exchanger water outlet pipe is connected to the heat exchanger liquid outlet of the shell through a steel belt type elastic hoop.

[0009] Furthermore, the front coolant circulation pipe is connected to an engine coolant outlet of the engine, and the rear coolant circulation pipe is connected to a thermostat.

[0010] Furthermore, the shell is made of aluminum alloy material.

[0011] Furthermore, the shell of the heat exchanger is fixedly mounted on the top of the shell of the gas rail, a threaded hole is provided on the top of the shell of the gas rail, a fixing hole matching the threaded hole is provided on the shell, and the gas rail and the shell are fixedly connected by bolts or screws.

[0012] Furthermore, the inner cavity in the shell has a U-shaped structure.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model installs a heat exchanger on the shell of the gas injection rail, and installs the shell of the heat exchanger on the engine coolant circulation pipeline through the heat exchanger liquid inlet and the heat exchanger liquid outlet, so that the higher temperature coolant flowing out of the engine can heat the shell of the heat exchanger, and then heat the shell of the gas injection rail through the shell of the heat exchanger, so as to melt the ice blocking the gas injection rail airway, so as to achieve the purpose of unblocking the gas injection rail airway. The utility model well solves the problem that the vehicle cannot switch the gas state due to ice blocking the gas injection rail airway. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the utility model;

[0016] Figure 2 It is a cross-sectional view of the heat exchanger 2 of the present invention.

[0017] In the figure: 1. engine coolant circulation pipeline; 2. heat exchanger; 3. gas injection rail; 4. shell; 5. heat exchanger liquid inlet; 6. outer shell; 7. heat exchanger liquid outlet; 8. front coolant circulation pipe; 9. rear coolant circulation pipe; 10. heat exchanger water inlet pipe; 11. heat exchanger water outlet pipe; 12. pressure reducing valve; 13. pressure reducing valve liquid inlet; 14. pressure reducing valve liquid outlet; 15. inner cavity. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0019] A water circulation heating structure for a CNG vehicle gas rail, characterized in that it includes an engine coolant circulation pipeline 1, a heat exchanger 2 and a gas rail 3, the heat exchanger 2 includes a shell 4, an inner cavity 15 is provided in the shell 4, a heat exchanger liquid inlet 5 and a heat exchanger liquid outlet 7 communicating with the inner cavity 15 are provided on the shell 4, the inner cavity 15 in the shell 4 is a U-shaped structure, the heat exchanger liquid inlet 5 and the heat exchanger liquid outlet 7 are respectively connected to the two ends of the inner cavity 15, the shell 4 is installed on the engine coolant circulation pipeline 1 through the heat exchanger liquid inlet 5 and the heat exchanger liquid outlet 7, and the shell 4 of the heat exchanger 2 is installed on the outer shell 6 of the gas rail 3.

[0020] The engine coolant circulation pipeline 1 of the utility model is a prior art. The engine coolant circulation pipeline 1 guides the coolant to circulate inside and outside the engine, effectively absorbs and takes away the heat generated during the operation of the engine, thereby ensuring that the engine is always maintained within a suitable operating temperature range. The temperature of the coolant just flowing out of the engine is relatively high. The heat exchanger 2 is installed at a position close to the engine outlet of the engine. The high-temperature coolant flowing out of the engine flows through the shell 4 of the heat exchanger 2 through the heat exchanger inlet 5 and the heat exchanger outlet 7, and heats the shell 4. Since the shell 4 of the heat exchanger 2 is installed on the shell 6 of the gas rail 3, the shell 4 of the heat exchanger 2 exchanges heat with the shell 6 of the gas rail 3, and heats the shell 6 of the gas rail 3, thereby melting the ice blocked in the gas rail 3 airway, and achieving the purpose of unblocking the gas rail 3 airway. The heat exchanger 2 described in the utility model can be installed between the engine coolant outlet and the thermostat of the engine.

[0021] The engine coolant circulation pipeline 1 includes a front coolant circulation pipe 8 and a rear coolant circulation pipe 9. The heat exchanger liquid inlet 5 is connected to the front coolant circulation pipe 8 through a heat exchanger water inlet pipe 10, and the heat exchanger liquid outlet 7 is connected to the rear coolant circulation pipe 9 through a heat exchanger water outlet pipe 11.

[0022] The utility model is connected to the engine coolant circulation pipeline 1 through the heat exchanger water inlet pipe 10 and the heat exchanger water outlet pipe 11.

[0023] It also includes a pressure reducing valve 12 installed on the engine coolant circulation pipeline 1, the heat exchanger outlet 7 is connected to the pressure reducing valve inlet 13 of the pressure reducing valve 12 through the heat exchanger outlet pipe 11, the pressure reducing valve outlet 14 of the pressure reducing valve 12 is connected to the rear coolant circulation pipe 9, and the rear coolant circulation pipe 9 is connected to the heat exchanger outlet pipe 11 through the pressure reducing valve 12.

[0024] The utility model can make the water pressure of the coolant more stable by installing the pressure reducing valve 12.

[0025] The heat exchanger water inlet pipe 10 and the heat exchanger water outlet pipe 11 are both made of EPDM material. The shell 4 is made of aluminum alloy material. The utility model can improve the heat exchange efficiency by making the shell 4 of aluminum alloy material.

[0026] The heat exchanger water inlet pipe 10 is connected to the heat exchanger liquid inlet 5 of the shell 4 through a steel belt type elastic hoop, and the heat exchanger water outlet pipe 11 is connected to the heat exchanger liquid outlet 7 of the shell 4 through a steel belt type elastic hoop.

[0027] The utility model uses a steel belt type elastic hoop to respectively fix the heat exchanger water inlet pipe 10 and the heat exchanger water outlet pipe 11, so the fixation is convenient and firm.

[0028] The front coolant circulation pipe 8 is connected to the engine coolant outlet of the engine, and the rear coolant circulation pipe 9 is connected to the thermostat.

[0029] The utility model connects the front coolant circulation pipe 8 to the engine coolant outlet of the engine, and the rear coolant circulation pipe 9 to the thermostat, so that the heat exchanger 2 is installed between the engine coolant outlet and the thermostat.

[0030] The shell 4 of the heat exchanger 2 is fixedly mounted on the top of the outer shell 6 of the gas rail 3. A threaded hole is provided on the top of the outer shell 6 of the gas rail 3. A fixing hole matching the threaded hole is provided on the shell 4. The gas rail 3 and the shell 4 are fixedly connected by bolts or screws.

[0031] When the heat exchanger 2 is fixedly mounted on the shell 6 of the gas rail 3, the bolts or screws only need to be inserted into the fixing holes of the shell 4 and the threaded holes of the shell 6 of the gas rail 3, so that the bottom surface of the shell 4 is closely attached to the top surface of the shell 6 of the gas rail 3, and the connection is convenient and firm.

Claims

1. A water circulation heating structure for a CNG vehicle fuel rail, characterized in that: The invention comprises an engine coolant circulation pipeline (1), a heat exchanger (2) and a fuel injection rail (3), wherein the heat exchanger (2) comprises a shell (4), an inner cavity (15) is provided in the shell (4), a heat exchanger liquid inlet (5) and a heat exchanger liquid outlet (7) communicating with the inner cavity (15) are provided on the shell (4), the shell (4) is installed on the engine coolant circulation pipeline (1) via the heat exchanger liquid inlet (5) and the heat exchanger liquid outlet (7), and the shell (4) of the heat exchanger (2) is installed on the outer shell (6) of the fuel injection rail (3).

2. The water circulation heating structure for CNG vehicle fuel rail according to claim 1 is characterized in that: The engine coolant circulation pipeline (1) comprises a front coolant circulation pipe (8) and a rear coolant circulation pipe (9); the heat exchanger liquid inlet (5) is connected to the front coolant circulation pipe (8) via a heat exchanger water inlet pipe (10), and the heat exchanger liquid outlet (7) is connected to the rear coolant circulation pipe (9) via a heat exchanger water outlet pipe (11).

3. The water circulation heating structure for CNG vehicle fuel rail according to claim 2 is characterized in that: It also includes a pressure reducing valve (12) installed on the engine coolant circulation pipeline (1), the heat exchanger liquid outlet (7) is connected to the pressure reducing valve liquid inlet (13) of the pressure reducing valve (12) through the heat exchanger water outlet pipe (11), the pressure reducing valve liquid outlet (14) of the pressure reducing valve (12) is connected to the rear coolant circulation pipe (9), and the rear coolant circulation pipe (9) is connected to the heat exchanger water outlet pipe (11) through the pressure reducing valve (12).

4. The water circulation heating structure for CNG vehicle fuel rail according to claim 3 is characterized in that: The heat exchanger water inlet pipe (10) and the heat exchanger water outlet pipe (11) are both made of EPDM material.

5. The water circulation heating structure for CNG vehicle fuel rail according to claim 4 is characterized in that: The heat exchanger water inlet pipe (10) is connected to the heat exchanger liquid inlet (5) of the shell (4) via a steel belt type elastic hoop, and the heat exchanger water outlet pipe (11) is connected to the heat exchanger liquid outlet (7) of the shell (4) via a steel belt type elastic hoop.

6. The water circulation heating structure for CNG vehicle fuel rail according to claim 3 is characterized in that: The front coolant circulation pipe (8) is connected to the engine coolant outlet of the engine, and the rear coolant circulation pipe (9) is connected to the thermostat.

7. The water circulation heating structure for CNG vehicle fuel rail according to claim 1 is characterized in that: The housing (4) is made of aluminum alloy material.

8. The water circulation heating structure for CNG vehicle fuel rail according to claim 7 is characterized in that: The shell (4) of the heat exchanger (2) is fixedly mounted on the top of the shell (6) of the gas injection rail (3); a threaded hole is provided on the top of the shell (6) of the gas injection rail (3); a fixing hole matching the threaded hole is provided on the shell (4); the gas injection rail (3) and the shell (4) are fixedly connected by bolts or screws.

9. The water circulation heating structure for CNG vehicle fuel rail according to any one of claims 1 to 8, characterized in that: The inner cavity (15) in the shell (4) is in a U-shaped structure.

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