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Air-tightness detection and nitrogen replacement system and control method for dual-fuel vehicles

A technology for air tightness detection and dual-fuel vehicles. It is applied in the direction of liquid tightness measurement using liquid/vacuum degree, and by measuring the increase and deceleration rate of the fluid. It can solve the problems of low integration, low detection accuracy, and complicated operation. problems, to achieve the effect of high intelligence, simple detection and operation, and high replacement efficiency

Active Publication Date: 2017-06-06
ZHEJIANG GEELY HLDG GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a high-precision air-tightness detection, detection and nitrogen replacement equipment in order to overcome the problems of low integration, low detection accuracy and complex operation in the prior art. High-efficiency airtightness detection and nitrogen replacement system and control method for dual-fuel vehicles

Method used

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  • Air-tightness detection and nitrogen replacement system and control method for dual-fuel vehicles
  • Air-tightness detection and nitrogen replacement system and control method for dual-fuel vehicles
  • Air-tightness detection and nitrogen replacement system and control method for dual-fuel vehicles

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Embodiment 1

[0061] Such as figure 1 , figure 2 The shown embodiment is an airtightness detection and nitrogen replacement system for a dual-fuel vehicle. The system includes a high-pressure gas storage device 4, a pressure reducing device 5 provided with a first flow meter 28, a pressure reference device 6, and an inflation device 7 , vacuum device 8, display 9 and controller 10; The high-pressure gas storage device is connected with the pressure reference device and the inflation device respectively through the decompression device; the controller is respectively connected with the high-pressure gas storage device, the decompression device, and the pressure reference device , inflatable device, vacuum device and display are electrically connected;

[0062] Such as image 3 , Figure 4 As shown, the high-pressure gas storage device includes a first solenoid valve 11, an air pump 12, a first filter 13, a second solenoid valve 14, a high-pressure air tank 15, a high-pressure nitrogen ta...

Embodiment 2

[0086] Such as Figure 5 , Figure 6 As shown, the decompression device in Embodiment 2 includes a third solenoid valve 26, a pressure reducing valve 27 and a third connecting pipe 38; the third solenoid valve, the pressure reducing valve and the third connecting pipe are connected in sequence, and the first flowmeter Located on the third connecting pipe; the third electromagnetic valve is connected with the high-pressure air tank, the high-pressure nitrogen tank and the pressure reducing valve respectively, and the third electromagnetic valve and the first flowmeter are electrically connected with the controller respectively; in embodiment 1 Step 200 is replaced by the following steps:

[0087] Step 10, the operator connects the first connecting head with the car inflation valve, the controller controls the third solenoid valve to connect to the high-pressure air tank, the fourth solenoid valve connects to the third connecting pipe and the reference tank, and the fifth solen...

Embodiment 3

[0095] In embodiment 3, such as Figure 4 , Figure 6 As shown, a fourth flowmeter 31 is arranged between the first connecting pipe and the second connecting pipe, and the fourth flowmeter is electrically connected to the controller; the step 230 is replaced by the following steps:

[0096] If A<the lower limit of the first flow difference standard range, the controller controls the pressure-reducing device to communicate with the high-pressure air tank, and the fourth and fifth solenoid valves are respectively communicated with the pressure-reducing device, and the air continues to enter the reference tank and the detected vehicle respectively. in the gas storage tank;

[0097] When the cumulative air flow detected by the first flowmeter reaches H, the controller controls the connection between the decompression device and the high-pressure air tank to be disconnected, and the communication between the fourth and fifth solenoid valves and the decompression device is disconne...

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Abstract

The invention discloses a dual-fuel automobile air tightness detection and nitrogen replacement system and a control method thereof. The system comprises a high-pressure gas storage device, a pressure reduction device provided with a first flow meter, a pressure reference device, an air charging device, a pumping vacuum device, a display, and a controller. The high-pressure gas storage device is connected with the pressure reference device and the air charging device through the pressure reduction device. The controller is electrically connected with the high-pressure gas storage device, the pressure reduction device, the pressure reference device, the air charging device, the vacuum pumping device and the display. The dual-fuel automobile air tightness detection and nitrogen replacement system of the invention has the characteristics of high accuracy of air tightness detection, high degree of intelligence, high efficiency of air tightness detection and nitrogen replacement, simple structure, and convenient operation.

Description

technical field [0001] The invention relates to the technical field of dual-fuel vehicles, in particular to an air-tightness detection and nitrogen replacement system and control method for dual-fuel vehicles with high air-tightness detection accuracy and high detection and nitrogen replacement efficiency. Background technique [0002] With the rise of oil prices and the enhancement of environmental protection awareness, dual-fuel vehicles are becoming more and more popular among consumers, especially CNG dual-fuel vehicles with affordable prices and mature technologies have become the first choice for families and rental operators. With the increase in demand for CNG vehicles, the original air tightness testing and nitrogen replacement technology, equipment and testing efficiency of CNG vehicles have been unable to meet the needs of mass production of dual-fuel vehicles, and cannot provide consumers with safer and more reliable products. CNG vehicles. [0003] The current ...

Claims

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Application Information

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IPC IPC(8): G01M3/32
Inventor 李书涛顾伟明
Owner ZHEJIANG GEELY HLDG GRP CO LTD
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