A control device for regulating the pressure of the oil return of a diesel engine

Abstract

This utility model discloses a diesel engine return oil pressure regulating control device, belonging to the field of diesel engine fuel system control technology. It includes a dry pump, a pressure regulating valve, a pipeline assembly, and a control circuit assembly. The pipeline assembly uses engineering pipelines. The pressure regulating valve is used to regulate the pressure at the dry pump inlet to ensure that the engine return oil pressure meets project requirements and that the return oil pipeline system is balanced. The control circuit assembly includes two power supply systems, a relay, and a benchtop control module. The power supply system consists of a regulated power supply and a power line. One end of one power supply system is connected to the negative terminal of the dry pump, and the other end of the normally open contact of the relay is connected to the positive terminal of the dry pump. One end of the other power supply system is connected to one end of the relay coil, and the other end of the relay coil and the other end of the power supply system are respectively connected to the switching terminals of the benchtop control module. This utility model has the technical advantages of precise pressure regulation, strong adaptability to operating conditions, convenient installation and maintenance, and high system reliability.

Description

Technical Field

[0001] This utility model belongs to the field of diesel engine fuel system control technology, and in particular relates to a diesel engine return oil pressure regulating control device. Background Technology

[0002] The pressure control of the diesel engine's return oil system is crucial for ensuring fuel injection accuracy, engine power, and fuel economy. During engine operation, the stability of the return oil pressure directly affects the consistency of fuel injection quantity, thus impacting engine emissions and fuel consumption. Current diesel engine return oil pressure control systems often employ simple mechanical pressure regulating structures or single-function electronic control components, which suffer from the following technical shortcomings: Insufficient pressure regulation accuracy: Traditional mechanical pressure regulating valves rely on spring force for regulation, and the pressure control range is fixed. They cannot dynamically adjust the return oil pressure according to engine operating conditions (such as speed and load), which can easily lead to fuel injection pressure fluctuations and affect the accuracy of fuel injection quantity. Poor system adaptability: It lacks the ability to adapt flexibly to different engine models and different operating conditions. When switching between multiple operating conditions (such as idling and heavy load), the return oil pressure is difficult to respond quickly, resulting in fuel system pressure imbalance. Installation and maintenance are complex: Pipeline connections are mostly made by thread or welding, which is inconvenient for disassembly and assembly; the integration of components is low, and troubleshooting and component replacement are time-consuming and labor-intensive, increasing operation and maintenance costs. Utility Model Content

[0003] To address the problems existing in the prior art, this utility model provides a diesel engine oil return pressure regulating control device, which has the advantages of precise pressure regulation, strong adaptability to working conditions, convenient installation and maintenance, and high system reliability. It solves the problems of insufficient pressure regulation accuracy of mechanical pressure regulating structure in the prior art, inability to dynamically adapt to engine working conditions, complex installation and maintenance costs due to pipeline connection and component design, and poor system tolerance and stability performance that easily leads to failure.

[0004] This utility model is implemented as follows: a diesel engine return oil pressure regulating control device includes a dry pump, a pressure regulating valve, a pipeline assembly, and a control circuit assembly. The pipeline assembly uses pressure-resistant and corrosion-resistant engineering pipelines, and the inlet and outlet of the dry pump are connected to the inlet and outlet of the pressure regulating valve respectively through compression fittings, forming a parallel structure between the dry pump and the pressure regulating valve. The dry pump is used to reduce the pressure of the engine return oil pipeline. The pressure regulating valve is used to regulate the pressure at the inlet of the dry pump to ensure that the engine return oil pressure meets the project requirements and the system balance of the return oil pipeline. The control circuit assembly includes two power supply systems, a relay, and a bench control module. The power supply system consists of a regulated power supply and a power line. One end of one power supply system is connected to the negative terminal of the dry pump, and the other end is connected to one normally open contact of the relay. The other end of the normally open contact of the relay is connected to the positive terminal of the dry pump. One end of the other power supply system is connected to one end of the relay coil, and the other end and the other end of the relay coil are respectively connected to the switching terminals of the bench control module.

[0005] This setup establishes a parallel and coordinated regulation mechanism between the dry pump and the pressure regulating valve. The dry pump actively reduces the pressure in the return oil line, while the pressure regulating valve synchronously and precisely controls the inlet pressure of the dry pump. Together, they achieve dynamic balance of return oil pressure, solving the problem that traditional mechanical pressure regulating valves can only fix the pressure and lack sufficient regulation precision. Simultaneously, the control circuit controls the relay switching through the bench control module, allowing the dry pump to be started and stopped in real time according to engine speed, load, and other operating conditions, achieving adaptability of pressure regulation to operating conditions and avoiding pressure fluctuations during multiple operating condition switching. Furthermore, the combination of pressure-resistant and corrosion-resistant engineering pipelines and compression fittings not only withstands diesel medium corrosion and system pressure shocks but also lays a convenient foundation for subsequent maintenance, comprehensively improving the core defects of traditional devices.

[0006] As a preferred embodiment of this utility model, the engineering pipeline is made of stainless steel, which has corrosion resistance and pressure resistance characteristics, and is suitable for the pressure and medium environment of the diesel engine oil return system.

[0007] This design allows the stainless steel pipe's corrosion resistance to effectively resist the erosion of diesel fuel and return oil impurities, preventing oil contamination caused by rust and peeling off the inner wall of the pipe, preventing impurities from clogging the pressure regulating valve or dry pump, and ensuring the stable operation of the pressure regulating components. Its pressure resistance can adapt to pressure fluctuations in the diesel engine's return oil system, preventing pipe rupture due to sudden pressure increases and extending pipe service life. At the same time, the smooth inner wall of the stainless steel pipe reduces oil flow resistance, preventing local pressure loss from affecting pressure regulation accuracy, and further ensuring the stability of return oil pressure control.

[0008] As a preferred embodiment of this utility model, the compression fittings used on the engineering pipeline are quick-connect structures, which can quickly connect and disconnect the engineering pipeline from the dry pump and pressure regulating valve.

[0009] With this setup, quick-connect compression fittings eliminate the need for thread tightening or welding; simply pressing or snapping them together connects the pipeline to the pump and pressure regulating valve, significantly reducing installation time and facilitating quick troubleshooting or replacement of components in the pump and valve. This solves the problems of complex, time-consuming, and labor-intensive installation and maintenance of traditional devices, and significantly reduces operation and maintenance costs.

[0010] As a preferred embodiment of this invention, the voltage specification of the regulated power supply is 12V or 24V.

[0011] This setup allows the device to adapt to the power system requirements of different types of diesel engines: small diesel engines, such as agricultural machinery and small construction machinery, mostly use 12V power, while large commercial vehicles and marine diesel engines mostly use 24V power. There is no need to design separate power modules for different models, which greatly improves the versatility and compatibility of the device. At the same time, the regulated power supply can avoid the impact of voltage fluctuations on the dry pump and relays, prevent the dry pump from starting or stopping late or the pressure regulation response from lagging due to voltage instability, and ensure the reliability of pressure regulation.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: Precise pressure regulation and strong adaptability to operating conditions: Through the synergistic effect of the dry pump and the pressure regulating valve, combined with the dynamic control of the control circuit, the return oil pressure can be precisely adjusted according to the engine operating conditions, adapting to the needs of multiple operating conditions such as idling and heavy load, ensuring stable fuel system pressure and improving fuel injection accuracy.

[0013] Easy installation and maintenance: The quick-connect design of compression fittings and stainless steel pipelines, along with the parallel layout of the dry pump and pressure regulating valve, makes the disassembly and replacement of components more efficient; the modular design of the control circuit simplifies troubleshooting and significantly reduces operation and maintenance costs.

[0014] High system reliability: The pressure-resistant and corrosion-resistant design of the pipelines and joints, combined with precise pressure regulation, effectively improves the service life and operational stability of the device, and reduces the risk of engine failure caused by abnormal return oil pressure. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the pipeline assembly connection structure provided in this embodiment of the utility model; Figure 2 This is a schematic diagram of the connection structure of the control circuit components provided in an embodiment of the present invention.

[0016] In the diagram: 1. Dry pump; 2. Pressure regulating valve; 3. Engineering pipeline; 4. Relay; 5. Bench control module; 6. Stabilized power supply; 7. Power cord. Detailed Implementation

[0017] To further understand the utility model content, features and effects of this utility model, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.

[0018] The structure of this utility model will now be described in detail with reference to the accompanying drawings.

[0019] refer to Figures 1 to 2 As shown in the figure, this utility model provides a diesel engine return oil pressure regulating control device, including a dry pump 1, a pressure regulating valve 2, a pipeline assembly, and a control circuit assembly. The pipeline assembly uses pressure-resistant and corrosion-resistant engineering pipelines 3, and the inlet and outlet of the dry pump 1 are connected to the inlet and outlet of the pressure regulating valve 2 respectively through compression fittings, forming a parallel structure between the dry pump 1 and the pressure regulating valve 2. The dry pump 1 is used to reduce the pressure of the engine return oil pipeline. The pressure regulating valve 2 is used to regulate the pressure at the inlet of the dry pump 1 to ensure that the engine return oil pressure meets the project requirements and the system balance of the return oil pipeline. The control circuit assembly includes two power supply systems, a relay 4, and a bench control module 5. The power supply system consists of a regulated power supply 6 and a power line 7. One end of one power supply system is connected to the negative terminal of the dry pump 1, and the other end is connected to one normally open contact of the relay 4. The other end of the normally open contact of the relay 4 is connected to the positive terminal of the dry pump 1. One end of the other power supply system is connected to one coil of the relay 4, and the other end and the other coil of the relay 4 are respectively connected to the switching terminals of the bench control module 5.

[0020] By adopting the above scheme, the dry pump 1 and the pressure regulating valve 2 form a parallel and coordinated regulation mechanism. The dry pump 1 can actively reduce the pressure of the return oil pipeline, and the pressure regulating valve 2 synchronously and precisely controls the inlet pressure of the dry pump 1. The two work together to achieve dynamic balance of return oil pressure, which solves the problem that the traditional mechanical pressure regulating valve 2 can only fix the pressure and has insufficient regulation accuracy. At the same time, the control circuit controls the on and off of the relay 4 through the bench control module 5, which can start and stop the dry pump 1 in real time according to the engine speed, load and other operating conditions, so as to achieve the adaptability of pressure regulation to the operating conditions and avoid pressure fluctuations when switching between multiple operating conditions. In addition, the combination of pressure-resistant and corrosion-resistant engineering pipeline 3 and compression fitting can not only withstand the corrosion of diesel medium and system pressure shock, but also lay a convenient foundation for subsequent maintenance, comprehensively improving the core defects of traditional devices.

[0021] Specifically, the engineering pipeline 3 is made of stainless steel, which has corrosion resistance and pressure resistance, and is suitable for the pressure and medium environment of the diesel engine oil return system.

[0022] By adopting the above solution, the corrosion resistance of stainless steel pipes can effectively resist the erosion of diesel fuel and impurities in return oil, avoid oil contamination caused by rust and peeling of the inner wall of the pipe, prevent impurities from clogging the pressure regulating valve 2 or the dry pump 1, and ensure the stable operation of the pressure regulating components. Its pressure resistance can adapt to the pressure fluctuations of the diesel engine return oil system, prevent the pipe from rupturing due to sudden pressure rise, and extend the service life of the pipe. At the same time, the smooth inner wall of the stainless steel pipe can reduce the resistance to oil flow, avoid local pressure loss from affecting the pressure regulating accuracy, and further ensure the stability of return oil pressure control.

[0023] Specifically, the compression fittings used on the engineering pipeline 3 are quick-connect type, which can quickly connect and disconnect the engineering pipeline 3 from the dry pump 1 and the pressure regulating valve 2.

[0024] Using the above solution, the quick-connect ferrule connector does not require thread tightening or welding. It can be connected to the engineering pipeline 3 and the dry pump 1 and pressure regulating valve 2 simply by pressing or snapping. This greatly shortens the installation time, facilitates quick troubleshooting of the dry pump 1 and pressure regulating valve 2 or replacement of parts, solves the problems of complex installation and maintenance of traditional devices, and significantly reduces operation and maintenance costs.

[0025] Specifically, the voltage specification of the regulated power supply 6 is 12V or 24V.

[0026] Using the above solution, the device can be adapted to the power system requirements of different types of diesel engines: small diesel engines, such as agricultural machinery and small construction machinery, mostly use 12V power supply, while large commercial vehicles and marine diesel engines mostly use 24V power supply. There is no need to design a separate power supply module for different models, which greatly improves the versatility and adaptability of the device. At the same time, the voltage regulator 6 can avoid the impact of voltage fluctuations on the dry pump 1 and the relay 4, prevent the dry pump 1 from starting or stopping late or the pressure regulation response from lagging due to voltage instability, and ensure the reliability of pressure regulation.

[0027] The working principle of this utility model: During use, the bench control module 5 controls the on / off state of the relay 4 coil through the switching terminals according to the engine operating conditions, such as speed and load, thereby controlling the opening and closing of the normally open contacts of the relay 4 to achieve dynamic on / off of the power supply to the dry pump 1. The dry pump 1 works in conjunction with the parallel pressure regulating valve 2. The dry pump 1 actively reduces the pressure of the engine return oil line, and the pressure regulating valve 2 synchronously and precisely adjusts the pressure at the inlet of the dry pump 1, together ensuring that the engine return oil pressure meets the requirements and maintaining the balance of the return oil line system, adapting to the pressure stability of the fuel system under multiple operating conditions.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A diesel engine return oil pressure regulating control device, characterized in that: Includes a dry pump (1), a pressure regulating valve (2), piping components, and a control circuit component; The pipeline assembly adopts pressure-resistant and corrosion-resistant engineering pipeline (3), and the inlet and outlet of the dry pump (1) are connected to the inlet and outlet of the pressure regulating valve (2) respectively through compression fittings, so that the dry pump (1) and the pressure regulating valve (2) form a parallel structure; The dry pump (1) is used to reduce the pressure in the engine return oil line; The pressure regulating valve (2) is used to regulate the pressure at the inlet of the dry pump (1) to ensure that the engine return oil pressure meets the project requirements and the system balance of the return oil pipeline; The control circuit assembly includes two power supply systems, a relay (4), and a bench control module (5). The power supply system consists of a regulated power supply (6) and a power line (7). One end of one power supply system is connected to the negative terminal of the dry pump (1), and the other end is connected to one end of the normally open contact of the relay (4). The other end of the normally open contact of the relay (4) is connected to the positive terminal of the dry pump (1). One end of the other power supply system is connected to one end of the coil of the relay (4), and the other end and the other end of the coil of the relay (4) are respectively connected to the switching terminals of the bench control module (5).

2. The diesel engine return oil pressure regulating control device as described in claim 1, characterized in that: The engineering pipeline (3) is made of stainless steel, which has corrosion resistance and pressure resistance, and is suitable for the pressure and medium environment of the diesel engine oil return system.

3. The diesel engine return oil pressure regulating control device as described in claim 1, characterized in that: The compression fittings used on the engineering pipeline (3) are quick-connect type, which can quickly connect and disconnect the engineering pipeline (3) from the dry pump (1) and the pressure regulating valve (2).

4. The diesel engine return oil pressure regulating control device as described in claim 1, characterized in that: The voltage specification of the regulated power supply (6) is 12V or 24V.

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