CN104373273A - Mass type intelligent oil-gauging device for fuel injection pump testbed - Google Patents

Abstract

A mass-type intelligent fuel-injection pump test bench oil measuring system, which has a mass-type oil-measuring device and a CPU control unit. The fuel injector connected to the oil outlet of the fuel injection pump, and the solenoid valve connected to the oil outlet of the fuel injector through the high-pressure oil pipe, and one oil outlet of the solenoid valve is connected to the measuring container set on the electronic balance through the oil pipe, and the solenoid valve The other oil outlet is connected to the fuel tank in the fuel injection pump test bench through the fuel pipe, and the signal input end of the CPU control unit is electrically connected to the signal output end of the pressure sensor set in the fuel injector and the temperature sensor set in the measuring container. The signal output end and the signal output end of the electronic balance, and the signal output end of the CPU control unit are connected to the signal input end of the solenoid valve. The invention realizes the automation and intellectualization of the oil measuring process, is convenient and quick to operate, and improves the oil measuring precision and work efficiency.

Description

Mass type intelligent fuel injection pump test bench oil measuring device

technical field

The invention relates to an oil measuring device. In particular, it relates to a mass-type intelligent fuel injection pump test bench oil measuring device.

Background technique

The fuel injection pump test bench is an indispensable equipment for inspection and adjustment of fuel injection pumps in diesel locomotive manufacturing and repair factories. Its main function is to detect and adjust various parameters of fuel injection pumps under various working conditions. An important index to measure the performance and quality of fuel injection pump test bench is the accuracy of fuel injection quantity measurement. With the increasing application of diesel engines and the continuous improvement of engine energy saving and environmental protection requirements, fuel injection pump manufacturers and maintenance industries have higher and higher technical requirements for fuel injection pump test benches, resulting in the design of fuel injection pump test benches. It is very necessary to improve the oil method and intelligent control technology for the development of the oil measuring device of the fuel injection pump test bench.

Contents of the invention

The technical problem to be solved by the present invention is to provide a mass-type intelligent fuel injection pump test bench oil measuring device that can realize the automation and intelligence of the oil measuring process.

The technical solution adopted in the present invention is: a mass-type intelligent fuel injection pump test bench oil measuring system, including a fuel injection pump test bench, which is set on the fuel injection pump test bench and provided by the fuel injection pump test bench. Oil measuring device, and the CPU control unit that is used to control the quality formula oil measuring device to measure, and described quality formula oil measuring device comprises: separately with the driving device in the described fuel injection pump test bench and the fuel tank that is used to provide fuel The connected fuel injection pump, the fuel injector connected with the oil outlet of the fuel injection pump through the oil pipe, the solenoid valve connected with the oil outlet of the fuel injector through the high-pressure oil pipe, one oil outlet of the solenoid valve The oil pipe is connected with the measuring container arranged on the electronic balance, and the other oil outlet of the solenoid valve is connected with the fuel tank in the fuel injection pump test bench through the oil pipe, and the signal input ends of the CPU control unit are respectively electrically connected and arranged on the fuel injection pump. The signal output end of the pressure sensor in the device, the signal output end of the temperature sensor arranged in the measuring container and the signal output end of the electronic balance, the signal output end of the CPU control unit is connected to the signal input end of the solenoid valve .

The fuel injector includes more than 2 fuel injection ports connected to the solenoid valve oil inlet through high-pressure oil pipes, and each fuel injection port is provided with a signal output port connected to the CPU control unit Electrically connected to the oil valve used to control the opening and closing of the fuel injection port, a vibration sensor for detecting the number of times of oil output is arranged on the oil outlet of each oil valve, and the vibration sensor on the oil outlet of each oil valve The signal output terminals are all electrically connected to the signal input terminals of the electronic counter, and the signal output terminals of the electronic counter are electrically connected to the signal input terminals of the CPU control unit.

The fuel injection pump test bench includes an electric motor arranged in the base, and the output shaft of the electric motor is connected with a V-belt to drive the fuel injection pump in the mass-type oil measuring device to send the oil sucked from the fuel tank to The cam mechanism of the fuel injector, the output shaft of the cam mechanism is provided with a cam speed sensor electrically connected to the signal input end of the CPU control unit.

The signal output ends of the CPU control unit are also respectively connected to a printer and a display.

The mass-type intelligent fuel injection pump test bench oil measuring device of the present invention effectively changes the manufacturing error, deposition error, liquid level reading error, bubble error, and the low degree of automation in the measurement process and the measurement For the problems of long time and low measurement accuracy, an external capacitive electronic balance is used for quality measurement, which overcomes the shortcomings of traditional measurement errors and long time; the use of single-chip microcomputer combined with automatic control technology realizes the automation and intelligence of the oil measurement process It is easy and quick to operate, and improves the accuracy of oil measurement and work efficiency.

Description of drawings

Fig. 1 is the overall structural representation of the present invention;

Fig. 2 is a side view of Fig. 1;

Fig. 3 is the schematic diagram of CPU control unit among the present invention;

Fig. 4 is the structural representation of mass type oil measuring device;

Fig. 5 is a schematic diagram of the fuel injection number counting structure at the fuel injection port of the fuel injector in the present invention.

in the picture

1: Fuel injection pump test bench 2: Mass oil measuring device

3: CPU control unit 4: Printer

5: Display 11: Fuel tank

12: Frame 13: Motor

14: V-belt 15: Cam mechanism

16: Cam speed sensor 21: Fuel injection pump

22: Injector 23: Solenoid valve

24: Measuring container 25: Electronic balance

26: Pressure sensor 27: Temperature sensor

28: Electronic counter 221: Fuel injection port

222: Oil valve 223: Vibration sensor

Detailed ways

The mass-type intelligent fuel injection pump test bench oil measuring system of the present invention will be described in detail below in combination with the embodiments and the accompanying drawings.

As shown in Fig. 1, Fig. 2 and Fig. 3, the mass-type intelligent fuel injection pump test bench oil measuring system of the present invention includes a fuel injection pump test bench 1, which is arranged on the fuel injection pump test bench 1 and tested by the fuel injection pump The table 1 provides a mass-type oil measuring device 2 for fuel, and a CPU control unit 3 for controlling the mass-type oil measuring device 2 for measurement. The signal output terminals of the CPU control unit 3 are also connected to a printer 4 and a display 5 respectively.

As shown in Figure 4, the mass-type fuel measuring device 2 includes: the fuel injection pump 21 connected to the driving device in the fuel injection pump test stand 1 and the fuel tank 11 for supplying fuel respectively, and connected to the fuel tank 11 through the fuel pipe. The fuel injector 22 connected to the oil outlet of the fuel injection pump 21 described above, the electromagnetic valve 23 connected to the oil outlet of the described fuel injector 22 through the high-pressure oil pipe, and an oil outlet of the electromagnetic valve 23 is connected to the set through the oil pipe. The measuring container 24 on the electronic balance 25 is connected, and another oil outlet of the electromagnetic valve 23 is connected with the fuel tank 11 in the fuel injection pump test bench 1 through the oil pipe, and the signal input ends of the CPU control unit 3 are respectively electrically connected and arranged on the The signal output end of the pressure sensor 26 in the fuel injector 22, the signal output end of the temperature sensor 27 arranged in the measurement container 24 and the signal output end of the electronic balance 25, the signal output end of the CPU control unit 3 Connect the signal input end of the solenoid valve 23.

As shown in Figure 5, the fuel injector 22 includes more than two fuel injection ports 221 connected to the oil inlet of the electromagnetic valve 23 through a high-pressure oil pipe, and each fuel injection port 221 is provided with a It is electrically connected to the signal output end of the CPU control unit 3 and is used to control the oil valve 222 for opening and closing the fuel injection port 221, and a vibration for detecting the number of times of oil output is provided on the oil outlet of each oil valve 222. Sensor 223, the signal output end of the vibration sensor 223 on the oil outlet of each oil valve 222 is electrically connected to the signal input end of the electronic counter 28, and the signal output end of the electronic counter 28 is electrically connected to the CPU control unit 3 signal input terminal.

As shown in Figure 1, the fuel injection pump test bench 1 includes an electric motor 13 arranged in the base 12, and the output shaft of the electric motor 13 is connected with the output shaft of the electric motor 13 through a V-belt 14 for driving a mass type oil measuring device The fuel injection pump 21 in 2 sends the oil inhaled from the fuel tank 11 to the cam mechanism 15 of the fuel injector 22 through the oil pipe. Connected cam speed sensor 16.

In the mass-type intelligent fuel injection pump test bench oil measuring system of the present invention, all stations of the fuel injection pump test bench share a set of metering systems, and oil is supplied to the electronic metering system through the oil valve in different periods, so that the output of the metering system in each period increases. The amount Δm is the detection result of this station. It solves the problem that in the traditional independent metering system, each station has its own set of metering and sensing systems, and different stations have different metering standards.

The working principle of the mass-type intelligent fuel injection pump test bench fuel measuring system of the present invention is as follows: after the fuel injection pump 21 to be tested is installed, the fuel is heated; Fuel pump injects oil, and fuel oil injects oil through high-pressure oil pipe, fuel injector 22, and oil liquid flows in the measuring container 24 on the electronic balance 25 through electromagnetic valve 23. The CPU control unit 3 controls the fuel to flow into the fuel tank 11 or into the measuring container 24 through the solenoid valve. When testing is needed, the CPU control unit 3 controls the solenoid valve to open the port leading to the measuring container 24, so that the fuel oil flows into the measuring container 24 on the electronic balance, and the electronic counter 28 starts counting the number of fuel injections entering the measuring container 24. When the number of fuel injections reaches the prefabricated number of times, the CPU control unit 3 controls the solenoid valve to close the fuel outlet leading to the measuring container 24, and opens the port leading to the fuel tank 11, the system is in the state of measuring fuel, and the sprayed fuel flows back to the fuel injection pump The fuel tank 11 in the test bench no longer enters the container on the electronic balance. The electronic balance weighs the quality of the fuel flowing into the test container, transmits it to the CPU control unit 3, and converts it into volume through calculation to obtain the volume of the fuel in the test fuel tank 11.

The temperature sensor 27 installed in the fuel tank is used to test the temperature of the fuel, so that the volume of the fuel can be corrected to the volume at 40° C., so as to compare whether the measured fuel volume of the fuel injection pump meets the requirements under a unified standard state. The cam speed sensor 16 is used to determine the operating speed of the camshaft, and the pressure sensor 14 is used to test the fuel supply pressure change in the injection fuel system, and convert the pressure change into a resistance value change for measurement. The signals of oil pressure, oil temperature and rotational speed are amplified and input to the CPU control unit 3, and can be printed out after being processed.

In the detection of the mass-type fuel measuring device, only the actual fuel injection quantity of the fuel injection pump is detected, and the fuel injection quantity is only related to the actual fuel injection quality, and the volume of the residual fuel quantity does not affect the metering value. The weighing of the mass is not disturbed by external factors such as gravity and temperature. The fuel mass measured by the system is closer to the real value after being converted by the formula, which eliminates the error of residual oil, deposition error, and meniscus reading error in volumetric measurement. and the effect of temperature on fuel volume. It can ensure that the measured value of fuel quantity does not change with the change of location and temperature.

Claims (4)

1. A mass-type intelligent fuel injection pump test bench oil measuring system, comprising a fuel injection pump test bench (1), which is arranged on the fuel injection pump test bench (1) and provided with fuel by the fuel injection pump test bench (1) The mass type oil measuring device (2), and the CPU control unit (3) for controlling the mass type oil measuring device (2) to measure, is characterized in that, the described mass type oil measuring device (2) includes: respectively The fuel injection pump (21) connected to the driving device in the described fuel injection pump test bench (1) and the fuel tank (11) for supplying fuel, the fuel injection pump (21) connected to the fuel outlet of the described fuel injection pump (21) through the fuel pipe. Oiler (22), the electromagnetic valve (23) that links to each other with the oil outlet of described oil injector (22) through high-pressure oil pipe, and an oil outlet of described electromagnetic valve (23) is arranged on electronic balance through oil pipe The measuring container (24) on (25) links to each other, and another oil outlet of solenoid valve (23) links to each other with the oil tank (11) in the fuel injection pump test bench (1) by oil pipe, and the CPU control unit (3) The signal input end is respectively electrically connected to the signal output end of the pressure sensor (26) set in the fuel injector (22), the signal output end of the temperature sensor (27) set in the measurement container (24) and the electronic The signal output end of the balance (25), the signal output end of the CPU control unit (3) is connected to the signal input end of the solenoid valve (23). 2. The mass-type intelligent fuel injection pump test bench fuel measuring system according to claim 1, characterized in that, the fuel injector (22) includes more than two high-pressure fuel pipes and the electromagnetic valve (23 ) fuel injection ports (221) connected to each other, each fuel injection port (221) is provided with an electrical connection with the signal output end of the CPU control unit (3) for controlling the fuel injection port ( 221) open and close the oil valve (222), on the oil outlet of each oil valve (222), a vibration sensor (223) for detecting the number of times of oil output is set, and each oil valve (222) output The signal output terminals of the vibration sensor (223) on the oil port are all electrically connected to the signal input terminals of the electronic counter (28), and the signal output terminals of the electronic counter (28) are electrically connected to the signal input terminals of the CPU control unit (3) end. 3. The mass-type intelligent fuel injection pump test bench oil measuring system according to claim 1, characterized in that, the fuel injection pump test bench (1) includes a motor (13) arranged in the base (12) , is connected with the output shaft of the motor (13) through a V-shaped belt (14) and is used to drive the fuel injection pump (21) in the mass type oil measuring device (2) to send the oil sucked from the fuel tank (11) into the The cam mechanism (15) of the fuel injector (22), the output shaft of the cam mechanism (15) is provided with a cam speed sensor (16) electrically connected to the signal input end of the CPU control unit (3). 4. The mass-type intelligent fuel injection pump test bench oil measuring system according to claim 1, characterized in that, the signal output end of the CPU control unit (3) is also connected to a printer (4) and a display (5) respectively .