CN112360657B - Distribution block for high-pressure common rail system and control method thereof - Google Patents
Distribution block for high-pressure common rail system and control method thereof Download PDFInfo
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- CN112360657B CN112360657B CN202011280974.1A CN202011280974A CN112360657B CN 112360657 B CN112360657 B CN 112360657B CN 202011280974 A CN202011280974 A CN 202011280974A CN 112360657 B CN112360657 B CN 112360657B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/004—Joints; Sealings
- F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
- F02D41/3836—Controlling the fuel pressure
- F02D41/3863—Controlling the fuel pressure by controlling the flow out of the common rail, e.g. using pressure relief valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
- F02M55/025—Common rails
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses a distribution block for a high-pressure common rail system, which comprises a distribution block body, and a plurality of high-pressure conversion interfaces and pressure control assemblies which are respectively arranged on the distribution block body; the high-pressure conversion interfaces are communicated with each other in pairs, and a high-pressure oil network is formed inside the distribution block body; one or more of the high-pressure conversion interfaces are used as high-pressure fuel inlets, the other high-pressure conversion interfaces are used as high-pressure fuel outlets, and high-pressure fuel enters through the high-pressure fuel inlets, is distributed in the high-pressure oil circuit network and then flows out of the high-pressure fuel outlets. The distribution block for the high-pressure common rail system not only can realize the functions of high-pressure fuel distribution, pressure signal acquisition, system safety protection and the like, but also can more accurately control the fuel pressure of the segmented rail type high-pressure common rail system.
Description
Technical Field
The invention relates to the technical field of high-pressure fuel supply of diesel engines, in particular to a distribution block for a high-pressure common rail system and a control method thereof.
Background
In order to improve the stability and consistency of fuel injection of a high-pressure common rail system of a high-power diesel engine, improve the fuel injection rate and reduce the cost of the high-pressure common rail system, a sectional rail type high-pressure common rail system can be adopted. Compared with the traditional high-pressure common rail system, in the sectional rail type high-pressure common rail system, because a high-pressure common rail pipe is omitted, the sectional rail type high-pressure common rail system needs to carry out position and structure design again on functions of high-pressure fuel distribution, pressure signal acquisition, system safety protection and the like.
Disclosure of Invention
The invention aims to provide a distribution block for a high-pressure common rail system, aiming at the functions of high-pressure fuel distribution, pressure signal acquisition, system safety protection and the like in a sectional rail type high-pressure common rail system, which not only can realize the functions of high-pressure fuel distribution, pressure signal acquisition, system safety protection and the like, but also can more accurately control the fuel pressure of the sectional rail type high-pressure common rail system.
The technical scheme adopted for realizing the purpose of the invention is as follows:
a distribution block for a high-pressure common rail system comprises a distribution block body, and a plurality of high-pressure conversion interfaces and pressure control assemblies which are respectively arranged on the distribution block body;
the high-pressure conversion interfaces are communicated with each other in pairs, and a high-pressure oil network is formed inside the distribution block body; one or more of the high-pressure conversion interfaces are used as high-pressure fuel inlets, the other high-pressure conversion interfaces are used as high-pressure fuel outlets, and high-pressure fuel enters through the high-pressure fuel inlets, is distributed in the high-pressure oil way network and then flows out of the high-pressure fuel outlets;
the pressure control assembly comprises a pressure sensor and a pressure control valve which are respectively communicated with the high-pressure oil road network; the pressure sensor senses the pressure in the high-pressure oil circuit network and transmits the pressure to the ECU;
the pressure control valve is opened or closed under the control of the ECU, and when the pressure control valve is opened, high-pressure fuel in the high-pressure fuel line network enters the low-pressure fuel line through the pressure control valve and is converted into low-pressure fuel, and then the low-pressure fuel flows out of the distribution block for the high-pressure common rail system from the low-pressure fuel outlet.
In the above technical solution, the pressure control assembly further includes a pressure relief valve, and the pressure relief valve is respectively communicated with the high-pressure oil path network and the low-pressure oil path;
when the pressure in the high-pressure oil circuit network exceeds the warning pressure, the pressure relief valve is opened, and high-pressure fuel oil in the high-pressure oil circuit network enters the low-pressure oil circuit through the pressure relief valve, is converted into low-pressure fuel oil and then flows out of the distribution block for the high-pressure common rail system from the low-pressure fuel oil outlet.
In the above technical scheme, the distribution block body is of a cubic structure, and the pressure sensor, the pressure control valve and the pressure release valve are respectively installed above the distribution block body.
In the above technical solution, the number of the high voltage conversion interfaces is 4, two of the high voltage conversion interfaces are installed below the distribution block body, and the other two high voltage conversion interfaces are respectively installed on two sides of the distribution block body.
In the above technical solution, the high pressure oil line network includes a first high pressure oil line, a second high pressure oil line, a third high pressure oil line and a fourth high pressure oil line; two ends of the first high-pressure oil way are respectively connected with the high-pressure conversion interface and the pressure control valve which are positioned at the bottom of the distribution block body; two ends of the second high-pressure oil way are respectively connected with the other high-pressure conversion interface and the pressure sensor which are positioned at the bottom of the distribution block body; the third high-pressure oil way penetrates through the first high-pressure oil way and the second high-pressure oil way, and two ends of the third high-pressure oil way are respectively connected with a high-pressure conversion interface positioned at two sides of the distribution block body; one end of the fourth high-pressure oil way is connected with the third high-pressure oil way, the other end of the fourth high-pressure oil way is connected with the pressure release valve, one end of the low-pressure oil way is connected to the pressure release valve, and the other end of the low-pressure oil way is connected to the low-pressure fuel outlet.
In the above technical solution, the high-voltage conversion interface is connected with the distribution block body through a thread.
In the technical scheme, the pressure sensor is connected with the distribution block body through threads; the lower end of the pressure sensor is provided with a pressure sensor ring surface, a sensor matching plane is arranged on a distribution block body at the end part of the high-pressure oil road network, and the pressure sensor ring surface and the sensor matching plane form high-pressure sealing;
the pressure control valve is connected with the distribution block body through threads; the distribution block body at the end part of the high-pressure oil road network is provided with a control valve matching plane, and the pressure control valve ring surface and the control valve matching plane form high-pressure sealing.
In the above technical scheme, the pressure release valve is connected with the distribution block body through a thread; the lower end of the pressure release valve is provided with a pressure release valve ring surface, a pressure release valve matching plane is arranged on the distribution block body at the end part of the high-pressure oil road network, and the pressure release valve ring surface and the pressure release valve matching plane form high-pressure sealing.
In the technical scheme, the low-pressure fuel outlet is provided with a low-pressure conversion interface used for connecting a system low-pressure oil way.
In yet another aspect of the present invention, in the control method of the distribution block for the high pressure common rail system, one or more of the high pressure switching ports serve as a high pressure fuel inlet, and the remaining high pressure switching ports serve as a high pressure fuel outlet; high-pressure fuel enters the distribution block body through the high-pressure fuel inlet, is distributed in the high-pressure oil circuit network and then flows out through the high-pressure fuel outlet;
the pressure control method comprises the following steps:
the pressure sensor senses the pressure in the high-pressure oil circuit network and transmits the pressure to the ECU;
the ECU receives the pressure in the high-pressure oil circuit network sensed by the pressure sensor and controls the opening or closing of the pressure control valve;
when the pressure in the high-pressure oil circuit network exceeds a control target pressure, the ECU controls the pressure control valve to open, high-pressure fuel oil in the high-pressure oil circuit network enters a low-pressure oil circuit through the pressure control valve to be converted into low-pressure fuel oil and then flows out of a distribution block for a high-pressure common rail system from a low-pressure fuel oil outlet, and meanwhile, the flow of the high-pressure fuel oil entering the distribution block body through the high-pressure fuel oil inlet is reduced so as to reduce the pressure in the high-pressure oil circuit network; when the pressure in the high-pressure oil circuit network is lower than the control target pressure, the ECU controls the pressure control valve to close, and meanwhile, the flow of high-pressure fuel oil entering the distribution block body through the high-pressure fuel oil inlet is increased, so that the pressure in the high-pressure oil circuit network is increased;
when the pressure in the high-pressure oil circuit network exceeds the warning pressure value, the pressure relief valve is opened, and high-pressure fuel oil in the high-pressure oil circuit network enters the low-pressure oil circuit through the pressure relief valve to be converted into low-pressure fuel oil and then flows out of the distribution block for the high-pressure common rail system from the low-pressure fuel oil outlet so as to reduce the pressure in the high-pressure oil circuit network.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the distribution block for the high-pressure common rail system, the pressure sensor and the pressure control valve are integrally installed on the distribution block body, so that functions of high-pressure fuel distribution, pressure signal acquisition, system safety protection and the like can be realized, and the distribution block not only can be used for a sectional rail type high-pressure common rail system, but also can be used for a traditional high-pressure common rail system.
2. According to the distribution block for the high-pressure common rail system, the pressure control valve is integrally installed on the distribution block body and controlled to be opened or closed by the ECU, so that the fuel pressure of the sectional rail type high-pressure common rail system can be controlled more accurately.
3. According to the distribution block for the high-pressure common rail system, the pressure release valve is integrally installed on the distribution block body, and when the pressure in the high-pressure common rail system exceeds the warning pressure, the pressure release valve is opened to release the pressure, so that the safety protection function of the system is realized.
Drawings
FIG. 1 is a schematic diagram of a distribution block for a high pressure common rail system;
FIG. 2 is a cross-sectional view of a distributor block for a high pressure common rail system;
FIG. 3 shows a cross-sectional view of the body of the dispenser block;
FIG. 4 is a view showing the configuration of the pressure sensor;
FIG. 5 is a view showing the configuration of a pressure control valve;
fig. 6 shows a configuration diagram of the pressure limiting valve.
In the figure: 1-distribution block body, 2-high pressure conversion interface, 3-high pressure oil circuit network, 3-1-first high pressure oil circuit, 3-2-second high pressure oil circuit, 3-3-third high pressure oil circuit, 3-4-fourth high pressure oil circuit, 4-pressure sensor, 4-1-pressure sensor ring surface, 5-pressure control valve, 5-1-pressure control valve ring surface, 6-pressure release valve, 6-1-pressure release valve ring surface, 7-low pressure oil circuit, 7-1-low pressure fuel outlet and 8-low pressure conversion interface.
Detailed Description
The present invention will be described in further detail with reference to specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
A distribution block for a high-pressure common rail system is shown in figure 1 and comprises a distribution block body 1, and a plurality of high-pressure conversion interfaces 2 and pressure control assemblies which are respectively arranged on the distribution block body 1;
the high-pressure conversion interfaces 2 are communicated with each other two by two, and a high-pressure oil network 3 is formed inside the distribution block body 1, as shown in fig. 2 and 3; one or more of the high-pressure conversion interfaces 2 are used as high-pressure fuel inlets, the rest high-pressure conversion interfaces 2 are used as high-pressure fuel outlets, and high-pressure fuel is distributed in the high-pressure fuel oil network 3;
the pressure control assembly comprises a pressure sensor 4 and a pressure control valve 5 which are respectively communicated with the high-pressure oil circuit network 3; the pressure sensor 4 senses the pressure in the high-pressure oil road network 3 and transmits the pressure to the ECU;
the pressure control valve 5 is opened or closed under the control of the ECU, when the pressure control valve 5 is opened, high-pressure fuel in the high-pressure oil network 3 enters a low-pressure oil channel 7 through the pressure control valve 5 to be converted into low-pressure fuel, and then the low-pressure fuel flows out of a distribution block for the high-pressure common rail system from a low-pressure fuel outlet 7-1.
The distribution method of the distribution block for the high-pressure common rail system comprises the following steps:
one or more of the high-pressure conversion interfaces 2 are used as high-pressure fuel inlets, and the rest high-pressure conversion interfaces 2 are used as high-pressure fuel outlets; high-pressure fuel enters the distribution block body 1 through the high-pressure fuel inlet, is distributed in the high-pressure oil road network 3 and then flows out through the high-pressure fuel outlet;
the pressure control method of the distribution block for the high-pressure common rail system comprises the following steps:
the pressure sensor 4 senses the pressure in the high-pressure oil road network 3 and transmits the pressure to the ECU;
the ECU receives the pressure in the high-pressure oil network 3 sensed by the pressure sensor 4 and controls the pressure control valve 5 to open or close;
when the pressure in the high-pressure oil network 3 exceeds the control target pressure, the ECU controls the pressure control valve 5 to open, high-pressure fuel oil in the high-pressure oil network 3 enters the low-pressure oil circuit 7 through the pressure control valve 5 to be converted into low-pressure fuel oil, then the low-pressure fuel oil flows out of the distribution block for the high-pressure common rail system from the low-pressure fuel oil outlet 7-1, and meanwhile, the flow of the high-pressure fuel oil entering the distribution block body 1 through the high-pressure fuel oil inlet is reduced so as to reduce the pressure in the high-pressure oil network 3; when the pressure in the high-pressure oil network 3 is lower than the control target pressure, the ECU controls the pressure control valve 5 to close, and simultaneously increases the flow of high-pressure fuel entering the distribution block body 1 through the high-pressure fuel inlet so as to improve the pressure in the high-pressure oil network 3.
The above-described distribution block for a high pressure common rail system may also be used in a conventional high pressure common rail system.
Example 2
This embodiment is described in detail based on embodiment 1.
Specifically, the distribution block body 1 is a cubic structure, and the pressure sensor 4, the pressure control valve 5 and the pressure release valve 6 are respectively installed above the distribution block body 1.
Specifically, the number of the high-pressure conversion interfaces 2 is 4, two of the high-pressure conversion interfaces 2 are installed below the distribution block body 1, the other two high-pressure conversion interfaces are installed on two sides of the distribution block body 1, the two high-pressure conversion interfaces 2 located below the distribution block body 1 are high-pressure fuel inlets, and the two high-pressure conversion interfaces 2 located on two sides of the distribution block body 1 are high-pressure fuel outlets.
Specifically, the high-pressure oil line network 3 comprises a first high-pressure oil line 3-1, a second high-pressure oil line 3-2, a third high-pressure oil line 3-3 and a fourth high-pressure oil line 3-4; two ends of the first high-pressure oil way 3-1 are respectively connected with the high-pressure conversion interface 2 and the pressure control valve 5 which are positioned at the bottom of the distribution block body 1; two ends of the second high-pressure oil path 3-2 are respectively connected with the other high-pressure conversion interface 2 and the pressure sensor 4 which are positioned at the bottom of the distribution block body 1; the third high-pressure oil way 3-3 penetrates through the first high-pressure oil way 3-1 and the second high-pressure oil way 3-2, and two ends of the third high-pressure oil way are respectively connected with a high-pressure conversion interface 2 positioned at two sides of the distribution block body 1; one end of the fourth high-pressure oil path 3-4 is connected with the third high-pressure oil path 3-3, the other end of the fourth high-pressure oil path is connected with the pressure release valve 6, one end of the low-pressure oil path 7 is connected to the pressure release valve 6, and the other end of the low-pressure oil path is connected to the low-pressure fuel outlet 7-1.
Specifically, the high-voltage conversion interface 2 is connected with the distribution block body 1 through threads.
Specifically, the pressure sensor 4 is connected with the distribution block body 1 through a thread; the lower end of the pressure sensor 4 is provided with a pressure sensor ring surface 4-1, a sensor matching plane is arranged on the distribution block body 1 at the end part of the high-pressure oil network 3, and the pressure sensor ring surface 4-1 and the sensor matching plane form high-pressure sealing.
Specifically, the pressure control valve 5 is connected with the distribution block body 1 through a thread; the lower end of the pressure control valve 5 is provided with a pressure control valve ring surface 5-1, a control valve matching plane is arranged on the distribution block body 1 at the end part of the high-pressure oil network 3, and the pressure control valve ring surface 5-1 and the control valve matching plane form high-pressure sealing.
Example 3
This embodiment is described based on embodiment 2, and its preferred structure is described.
Preferably, the pressure control assembly further comprises a pressure relief valve 6, and the pressure relief valve 6 is respectively communicated with the high-pressure oil line network 3 and the low-pressure oil line 7;
when the pressure in the high-pressure oil network 3 exceeds the warning pressure, the pressure release valve 6 is opened, and high-pressure fuel oil in the high-pressure oil network 3 enters the low-pressure oil channel 7 through the pressure release valve 6, is converted into low-pressure fuel oil and then flows out of the distribution block for the high-pressure common rail system from the low-pressure fuel oil outlet 7-1.
Specifically, the pressure release valve 6 is connected with the distribution block body 1 through a thread; the lower end of the pressure release valve 6 is provided with a pressure release valve ring surface 6-1, a pressure release valve matching plane is arranged on the distribution block body 1 at the end part of the high-pressure oil road network 3, and the pressure release valve ring surface 6-1 and the pressure release valve matching plane form high-pressure sealing.
Preferably, the low-pressure fuel outlet 7-1 is provided with a low-pressure conversion interface 8 for connecting a system low-pressure oil path.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. The distribution block for the high-pressure common rail system is characterized by comprising a distribution block body (1), and a plurality of high-pressure conversion interfaces (2) and pressure control assemblies which are respectively installed on the distribution block body (1);
the high-pressure conversion interfaces (2) are communicated with each other in pairs, and a high-pressure oil circuit network (3) is formed in the distribution block body (1); one or more of the high-pressure conversion interfaces (2) are used as high-pressure fuel inlets, the other high-pressure conversion interfaces (2) are used as high-pressure fuel outlets, and high-pressure fuel enters through the high-pressure fuel inlets, is distributed in the high-pressure oil circuit network (3) and then flows out of the high-pressure fuel outlets;
the pressure control assembly comprises a pressure sensor (4) and a pressure control valve (5) which are respectively communicated with the high-pressure oil circuit network (3); the pressure sensor (4) senses the pressure in the high-pressure oil circuit network (3) and transmits the pressure to the ECU;
the pressure control valve (5) is opened or closed under the control of an ECU, when the pressure control valve (5) is opened, high-pressure fuel in the high-pressure oil circuit network (3) enters a low-pressure oil circuit (7) through the pressure control valve (5) to be converted into low-pressure fuel, and then the low-pressure fuel flows out of a low-pressure fuel outlet (7-1) and flows out of a distribution block for a high-pressure common rail system;
the distribution block body (1) is of a cubic structure, and the pressure sensor (4), the pressure control valve (5) and the pressure release valve (6) are respectively installed above the distribution block body (1);
the high-pressure oil line network (3) comprises a first high-pressure oil line (3-1), a second high-pressure oil line (3-2), a third high-pressure oil line (3-3) and a fourth high-pressure oil line (3-4); two ends of the first high-pressure oil way (3-1) are respectively connected with the high-pressure conversion interface (2) and the pressure control valve (5) which are positioned at the bottom of the distribution block body (1); two ends of the second high-pressure oil way (3-2) are respectively connected with the other high-pressure conversion interface (2) and the pressure sensor (4) which are positioned at the bottom of the distribution block body (1); the third high-pressure oil way (3-3) penetrates through the first high-pressure oil way (3-1) and the second high-pressure oil way (3-2), and two ends of the third high-pressure oil way are respectively connected with a high-pressure conversion interface (2) positioned on two sides of the distribution block body (1); one end of the fourth high-pressure oil way (3-4) is connected with the third high-pressure oil way (3-3), the other end of the fourth high-pressure oil way is connected with the pressure release valve (6), one end of the low-pressure oil way (7) is connected to the pressure release valve (6), and the other end of the low-pressure oil way is connected to the low-pressure fuel outlet (7-1).
2. The distributor block for a high-pressure common rail system according to claim 1, wherein the pressure relief valve (6) is respectively communicated with the high-pressure oil line network (3) and the low-pressure oil line (7);
when the pressure in the high-pressure oil path network (3) exceeds the warning pressure, the pressure relief valve (6) is opened, and high-pressure fuel in the high-pressure oil path network (3) enters the low-pressure oil path (7) through the pressure relief valve (6) and is converted into low-pressure fuel and then flows out of the distribution block for the high-pressure common rail system from the low-pressure fuel outlet (7-1).
3. The distributor block for a high pressure common rail system according to claim 2, wherein the number of the high pressure switching ports (2) is 4, two of the high pressure switching ports (2) are installed below the distributor block body (1), and the remaining two are installed at both sides of the distributor block body (1), respectively.
4. The distributor block for a high pressure common rail system according to claim 2, wherein the high pressure switching port (2) is screwed to the distributor block body (1).
5. The distributor block for a high pressure common rail system according to claim 2, wherein the pressure sensor (4) is screwed to the distributor block body (1); the lower end of the pressure sensor (4) is provided with a pressure sensor ring surface (4-1), a sensor matching plane is arranged on the distribution block body (1) at the end part of the high-pressure oil circuit net (3), and the pressure sensor ring surface (4-1) and the sensor matching plane form high-pressure sealing;
the pressure control valve (5) is connected with the distribution block body (1) through threads; the distribution block is characterized in that the lower end of the pressure control valve (5) is provided with a pressure control valve ring surface (5-1), a control valve matching plane is arranged on the distribution block body (1) at the end part of the high-pressure oil circuit net (3), and the pressure control valve ring surface (5-1) and the control valve matching plane form high-pressure sealing.
6. The distribution block for a high pressure common rail system according to claim 5, wherein the relief valve (6) is screwed to the distribution block body (1); the lower end of the pressure release valve (6) is provided with a pressure release valve ring surface (6-1), a pressure release valve matching plane is arranged on the distribution block body (1) at the end part of the high-pressure oil circuit net (3), and the pressure release valve ring surface (6-1) and the pressure release valve matching plane form high-pressure sealing.
7. The distributor block for a high-pressure common rail system according to claim 5, wherein the low-pressure fuel outlet (7-1) is provided with a low-pressure switching connection (8) for connecting a system low-pressure oil line.
8. The control method of a distribution block for a high pressure common rail system according to any one of claims 2 to 7,
one or more of the high-pressure conversion interfaces (2) are used as high-pressure fuel inlets, and the rest high-pressure conversion interfaces (2) are used as high-pressure fuel outlets; high-pressure fuel enters the distribution block body (1) through the high-pressure fuel inlet, is distributed in the high-pressure oil circuit network (3) and then flows out through the high-pressure fuel outlet;
the pressure control method comprises the following steps:
the pressure sensor (4) senses the pressure in the high-pressure oil circuit network (3) and transmits the pressure to the ECU;
the ECU receives the pressure in the high-pressure oil circuit network (3) sensed by the pressure sensor (4) and controls the pressure control valve (5) to be opened or closed;
when the pressure in the high-pressure oil circuit network (3) exceeds a control target pressure, an ECU controls a pressure control valve (5) to open, high-pressure fuel oil in the high-pressure oil circuit network (3) enters a low-pressure oil circuit (7) through the pressure control valve (5) to be converted into low-pressure fuel oil, then the low-pressure fuel oil flows out of a distribution block for a high-pressure common rail system from a low-pressure fuel oil outlet (7-1), and meanwhile, the flow of the high-pressure fuel oil entering the distribution block body (1) through a high-pressure fuel oil inlet is reduced, so that the pressure in the high-pressure oil circuit network (3) is reduced; when the pressure in the high-pressure oil circuit network (3) is lower than the control target pressure, the ECU controls the pressure control valve (5) to close, and simultaneously increases the flow of high-pressure fuel oil entering the distribution block body (1) through the high-pressure fuel oil inlet so as to improve the pressure in the high-pressure oil circuit network (3);
when the pressure in the high-pressure oil path network (3) exceeds the warning pressure value, the pressure relief valve (6) is opened, high-pressure fuel in the high-pressure oil path network (3) enters the low-pressure oil path (7) through the pressure relief valve (6) to be converted into low-pressure fuel, and then flows out of the high-pressure common rail system from the low-pressure fuel outlet (7-1) to form a distribution block, so that the pressure in the high-pressure oil path network (3) is reduced.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011280974.1A CN112360657B (en) | 2020-11-16 | 2020-11-16 | Distribution block for high-pressure common rail system and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011280974.1A CN112360657B (en) | 2020-11-16 | 2020-11-16 | Distribution block for high-pressure common rail system and control method thereof |
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| CN112360657A CN112360657A (en) | 2021-02-12 |
| CN112360657B true CN112360657B (en) | 2022-04-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102338007A (en) * | 2011-08-28 | 2012-02-01 | 中国兵器工业集团第七○研究所 | Oil separator of high-pressure common-rail system |
| CN102734017A (en) * | 2012-06-27 | 2012-10-17 | 无锡开普动力有限公司 | Electronic control high-pressure common-rail fuel injection system for V-shaped diesel engine |
| CN203717206U (en) * | 2013-12-28 | 2014-07-16 | 潍柴动力股份有限公司 | Oil pumping mechanism for common rail engine |
| CN109488506A (en) * | 2018-09-25 | 2019-03-19 | 潍柴动力股份有限公司 | Marine V Type engine fuel oil system and Marine V h type engine h |
| CN210141181U (en) * | 2019-07-16 | 2020-03-13 | 中国石油天然气集团有限公司 | Fuel distribution system for common rail engine |
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