Electromagnetic clutch air compressor system of engine

Abstract

The utility model relates to the technical field of vehicle pneumatic braking and the technical field of engine air compressors, in particular to an engine electromagnetic clutch air compressor system which comprises an engine body, an air compressor pump body assembly, an electromagnetic clutch assembly, an air storage tank, a pressure feedback module and an engine control unit module. An engine body crankshaft is connected with an electromagnetic clutch assembly belt pulley through a belt, an electromagnetic clutch and a clutch belt pulley are integrated, and clutch output is connected with a mechanical air compressor. The pressure feedback switch feeds back pressure through the gas tank and controls the electromagnetic clutch to be disconnected and connected. When the pressure of the air storage tank reaches a threshold value, the electromagnetic clutch air compressor device disconnects the electromagnetic clutch to stop the operation of the air compressor so as to control the operation of the air compressor. Compared with a mechanical air compressor on an existing diesel engine, the air compressor can be effectively utilized, the load of the air compressor can be reduced, and the energy efficiency of the engine can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical fields of vehicle air braking and engine air compressors, and specifically relates to an engine electromagnetic clutch air compressor system. Background Art

[0002] Currently, commercial vehicles usually use air braking. For commercial vehicles equipped with diesel engines, mechanical air compressors are used to inflate. In the existing air compressor technology, due to the hard connection between the air compressor and the engine, the air compressor will work simultaneously when the engine is running. Due to the hard connection, the air compressor cannot be controlled independently. After the air pressure in the air storage tank of the vehicle braking system reaches the set pressure, the air compressor still follows the engine to work and cannot be stopped or shut down independently. After the air storage tank pressure value meets the pressure condition, the air compressor still keeps running, resulting in the piston of the air compressor running for a long time, increasing the use loss. And at this time, the operation of the air compressor is ineffective work. The ineffective work increases the operating load of the engine and causes energy consumption waste.

[0003] During the continuous operation of the air compressor, relatively large noise will be generated, which has an adverse effect on the comfort of long-term driving. When the water-cooled air compressor works, it needs coolant for cooling. During the ineffective work process, heat load still needs to be cooled down. At the same time, the implementation of regulations promotes energy conservation and emission reduction, and the monitoring of the fuel consumption of diesel commercial vehicles is becoming increasingly strict, which promotes enterprises to make improvements in technology to reduce energy consumption. Summary of the Utility Model

[0004] The utility model aims at the above problems and provides an engine electromagnetic clutch air compressor system.

[0005] The technical solution adopted is an engine electromagnetic clutch air compressor system, which includes an engine body, an air compressor pump body assembly, an electromagnetic clutch assembly, an air storage tank, a pressure feedback module and an engine control unit module;

[0006] The engine body is respectively connected with the air compressor pump body assembly and the electromagnetic clutch assembly;

[0007] The compressed air output end of the air compressor pump body assembly is connected with the air inlet end of the air storage tank through an air pipe;

[0008] The pressure feedback module is arranged on the air storage tank and can collect the pressure data of the electromagnetic clutch assembly and the air storage tank;

[0009] The engine control unit module receives the pressure data transmitted by the pressure feedback module and adjusts and controls the engine body.

[0010] Optionally, the air compressor pump body assembly includes a piston pump body and a mounting flange, and the mounting flange is axially fixed on the rotating shaft at the lower end of the piston pump body.

[0011] Optionally, the air compressor pump body assembly further includes an air compressor control solenoid valve, which is arranged on the mounting flange and is signal-connected to the pressure feedback module. The air compressor control solenoid valve can control the air compressor pump body.

[0012] Optionally, the electromagnetic clutch assembly includes a multi-wedge belt pulley and a hub, and the hub is connected to the crankshaft of the air compressor pump body by bolts;

[0013] The multi-wedge belt pulley is connected to the crankshaft pulley at the front end of the engine body through the drive belt of the engine body.

[0014] The beneficial effects of the present utility model are as follows:

[0015] An engine electromagnetic clutch air compressor is provided, which has a compact structure and is suitable for engines originally matched with mechanical air compressors. At the same time, the electromagnetic clutch is used to replace the traditional hard connection drive, solving the start-stop problem of the air compressor during the operation of the engine.

[0016] At the same time, after the air pressure in the air storage tank reaches the set pressure, the air compressor stops working. In the case of low usage frequency of air brakes, the air compressor can not work for a long time, greatly reducing the operation time of the air compressor, reducing the wear of the air compressor and thus extending the service life. During the process of the air compressor stopping working, the engine load decreases and the fuel consumption is reduced. In the engine bench test comparison, when the air compressor stops working, the specific fuel consumption can be reduced by about 3 g / kWh.

[0017] The operation time of the air compressor is reduced, thereby reducing the duration of the air compressor noise and improving the comfort to a certain extent. The operation time of the air compressor is reduced, and the generated heat is reduced. For water-cooled air compressors, the heat load can be reduced, thereby reducing the engine cooling power. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the cooperation in an engine electromagnetic clutch air compressor system;

[0019] Figure 2 It is a schematic structural diagram of an engine electromagnetic clutch air compressor system;

[0020] Figure 3 It is a monitoring strategy flow chart in the engine control unit module.

[0021] Wherein the reference numerals: 1 is the piston pump body, 2 is the hub, 3 is the multi-wedge belt pulley, and 4 is the air compressor control solenoid valve. Detailed Embodiments

[0022] The following uses specific specific examples to illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0023] It should be noted that the diagrams provided in the following embodiments only schematically illustrate the basic concept of the present utility model. Therefore, only the components related to the present utility model are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components during actual implementation. The types, quantities, and proportions of the components during actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0024] As Figure 1 and Figure 2 shown, an engine electromagnetic clutch air compressor system includes an engine body, an air compressor pump body assembly, an electromagnetic clutch assembly, an air storage tank, a pressure feedback module, and an engine control unit module;

[0025] The engine body is respectively connected to the air compressor pump body assembly and the electromagnetic clutch assembly;

[0026] The compressed air output end of the air compressor pump body assembly is connected to the air inlet end of the air storage tank through an air pipe;

[0027] The pressure feedback module is arranged on the air storage tank and can collect the pressure data of the electromagnetic clutch assembly and the air storage tank;

[0028] The engine control unit module receives the pressure data transmitted by the pressure feedback module and adjusts and controls the engine body.

[0029] The purpose of such a design is to provide an engine electromagnetic clutch air compressor, which has a compact structure and is suitable for an engine originally matched with a mechanical air compressor. At the same time, an electromagnetic clutch is used to replace the traditional hard connection drive, solving the start-stop problem of the air compressor during the operation of the engine.

[0030] At the same time, for a diesel commercial vehicle during operation, after the air pressure in the air storage tank of the vehicle braking system reaches the set pressure, the air compressor still works following the engine and cannot be stopped or shut down separately. Since the start-stop of the air compressor cannot be controlled, the air compressor runs for a long time, shortening the service life of the air compressor. The air compressor will increase the load of the engine during the process of running following the engine, increasing the energy consumption. The air compressor makes a relatively large noise during continuous operation. Most of the air compressors currently matched with the engine use water cooling. The continuous ineffective operation of the air compressor generates heat, increasing the cooling pressure of the engine.

[0031] The system provided by the utility model can disconnect the connection of the air compressor through an electromagnetic clutch after the air pressure in the air storage tank of the braking system meets the set pressure, so as to stop the air compressor from working. When the pressure is lower than the set pressure, the electromagnetic clutch is attracted to make the air compressor run. This system can control the start and stop of the air compressor at a lower cost on the existing basis. On the one hand, it reduces the running time of the air compressor and reduces wear. On the other hand, it effectively reduces the energy consumption of the engine.

[0032] In this embodiment, the air compressor pump body assembly includes a piston pump body 1 and a mounting flange, and the mounting flange is axially fixed on the rotating shaft at the lower end of the piston pump body 1.

[0033] At the same time, the air compressor pump body assembly further includes an air compressor control solenoid valve 4, and the air compressor control solenoid valve 4 is arranged on the mounting flange, and the air compressor control solenoid valve 4 is signal-connected to the pressure feedback module, and the air compressor control solenoid valve 4 can control the air compressor pump body.

[0034] Furthermore, the electromagnetic clutch assembly includes a multi-wedge belt pulley 3 and a hub 2, and the hub 2 is connected to the crankshaft of the air compressor pump body by bolts;

[0035] The multi-wedge belt pulley 3 is connected to the crankshaft pulley at the front end of the engine body through the drive belt of the engine body.

[0036] The purpose of such a design is that the piston pump body can reciprocate in the cylinder to inhale and compress and discharge air, and the mounting flange is fixed on the bottom plate of the gear chamber on the front end face of the engine to ensure that the center of the rotating shaft of the air compressor is perpendicular to the end face.

[0037] Furthermore, the principle of the electromagnetic clutch assembly is that when the air compressor control solenoid valve is powered on, the coil is energized to generate magnetic force to attract the suction cup, so that the multi-wedge belt pulley drives the air compressor.

[0038] At the same time, the pressure sensor measuring point of the pressure feedback module is installed at a place where the air pressure in the air storage tank is relatively stable, and it is avoided to be installed at a position closer to the inlet and outlet of the air tank, because the unstable air flow at the inlet and outlet will cause fluctuations in the measurement results.

[0039] It should be noted that the pressure switch of the pressure feedback module is composed of a pressure port, an internal diaphragm and a spring. When the pressure enters the port, the diaphragm will deflect into the spring. If the force entering the pressure switch is greater than the preset force applied by the spring, the switch contacts will touch and cause the switch to act.

[0040] The output terminal of the pressure feedback module control signal is connected to the air compressor control solenoid valve. By selecting the corresponding pressure range pressure feedback control component according to the air storage tank pressure, when the measured pressure is greater than the air storage tank pressure control signal, a low level is output, the signal of the air compressor control solenoid valve is pulled low, the electromagnetic clutch coil is powered off and loses magnetism, and the suction cup disengages to release the driving state. Conversely, when the measured pressure is lower than the air storage tank pressure control signal, a high level is output, the signal of the air compressor control solenoid valve is pulled high, the suction cup of the electromagnetic clutch coil is attracted, and the air compressor is driven to work.

[0041] The feedback signal of the pressure feedback module is connected to the engine control unit module through a wire. Corresponding signal measurement pins are configured in the engine control unit module, a monitoring variable for the air storage tank pressure is added, and software requirements are added for the new signal. According to the engine operating conditions and the brake signal, corresponding strategies are formulated for the air storage efficiency and abnormal air storage conditions of the air compressor, and information feedback is added for exceeding or falling below the pressure range or other unreasonable behaviors to facilitate maintenance.

[0042] In this embodiment, as Figure 3 shown, based on an engine electromagnetic clutch air compressor system, an engine electromagnetic clutch air compressor control method is also provided, including the following steps:

[0043] S1. After the feedback signal of the pressure feedback module is connected to the engine control unit module through a wire, the feedback signal of the pressure feedback module is input, and the engine control unit module obtains the pin input information and filters the input signal.

[0044] S2. Judge the physical rationality of the processed signal.

[0045] S3. For reasonable signals, by obtaining the brake signal and vehicle operating conditions in the engine control unit module, a pressure building model is established through calibration tests to calculate the pressure building time, and the pressure building time is evaluated during use.

[0046] In specific implementation, in S2, signals beyond the physical boundary are considered sensor failures, corresponding fault IDs are activated, and fault information is fed back.

[0047] At the same time, in S3, if the pressure building time is higher than the slowest pressure building time of the model, it is considered that the pressure building is abnormal. If the pressure building time is lower than the minimum pressure building model time, it is considered that the pressure building is too fast. Corresponding fault IDs are activated for different pressure building abnormal results, and fault information is fed back. And if the pressure building time is normal, a system normal identifier is fed back, and the system continuously monitors.

[0048] In actual use, the engine control unit obtains the pin input information, filters the input signal, and adjusts the filtering frequency according to the actually selected pressure feedback control component. Here, 100 ms is used; the processed signal is judged for physical rationality, and signals beyond the physical boundary are considered sensor failures. Here, continuous high level, continuous low level, and signals beyond the output voltage value of the pressure sensor are regarded as unreasonable signals.

[0049] In this way, when the air pressure in the air storage tank reaches the set pressure, the air compressor stops working. In the case of a low air braking usage frequency, the air compressor can not work for a long time, greatly reducing the operation time of the air compressor, reducing the wear of the air compressor and thus extending its service life. During the process of the air compressor stopping working, the engine load decreases and the fuel consumption reduces. In the engine bench comparison, the air compressor stopping working can reduce the specific fuel consumption by about 3 g / kWh.

[0050] The operation time of the air compressor is reduced, thus reducing the duration of the air compressor noise, which has a certain improvement on comfort. The operation time of the air compressor is reduced, and the generated heat is reduced. For a water-cooled air compressor, the heat load can be reduced, thereby reducing the engine cooling power.

[0051] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An engine electromagnetic clutch air compressor system, characterized in that: It includes an engine body, an air compressor pump assembly, an electromagnetic clutch assembly, an air storage tank, a pressure feedback module and an engine control unit module; The engine body is connected to the air compressor pump assembly and the electromagnetic clutch assembly respectively; The compressed air output end of the air compressor pump assembly is connected to the air inlet end of the air storage tank through an air pipe; The pressure feedback module is arranged on the gas storage tank and can collect pressure data of the electromagnetic clutch assembly and the gas storage tank; The engine control unit module receives the pressure data transmitted by the pressure feedback module and adjusts and controls the engine body.

2. The engine electromagnetic clutch air compressor system according to claim 1, characterized in that: The air compressor pump body assembly comprises a piston pump body (1) and a mounting flange, wherein the mounting flange is axially fixed on a rotating shaft at the lower end of the piston pump body (1).

3. The engine electromagnetic clutch air compressor system according to claim 2, characterized in that: The air compressor pump body assembly further comprises an air compressor control solenoid valve (4), which is arranged on the mounting flange and is connected to the pressure feedback module signal. The air compressor control solenoid valve (4) can control the air compressor pump body.

4. The engine electromagnetic clutch air compressor system according to claim 3, characterized in that: The electromagnetic clutch assembly comprises a multi-V belt pulley (3) and a wheel hub (2), wherein the wheel hub (2) is connected to the crankshaft of the air compressor pump body via bolts; The multi-V belt pulley (3) is connected to the crankshaft pulley at the front end of the engine body via a transmission belt of the engine body.

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