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Gas tightness detection and nitrogen gas replacement system of dual-fuel automobile and controlling method thereof

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 rate of increase and deceleration of 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

Inactive Publication Date: 2015-07-01
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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  • Gas tightness detection and nitrogen gas replacement system of dual-fuel automobile and controlling method thereof
  • Gas tightness detection and nitrogen gas replacement system of dual-fuel automobile and controlling method thereof
  • Gas tightness detection and nitrogen gas replacement system of dual-fuel automobile and controlling method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0061] Such as figure 1 , figure 2 The embodiment shown is an air tightness detection and nitrogen replacement system for dual-fuel vehicles. The system is connected to the air 1, the nitrogen tank 2 and the car inflation valve 3 respectively; the system includes a high-pressure gas storage device 4 and a pressure reduction device 5 , Pressure reference device 6, inflator 7, vacuum device 8, first display 9 and controller 10; the air outlet of the high-pressure gas storage device is connected to the pressure reducing device, and the pressure reducing device is respectively connected to the pressure reference device and the inflating device Connection; the controller is respectively electrically connected with the high-pressure gas storage device, the pressure reduction device, the pressure reference device, the inflation device, the vacuum device and the first display;

[0062] Such as image 3 , Figure 5 As shown, the high-pressure gas storage device includes a first solenoid v...

Embodiment 2

[0087] Such as Figure 4 , Image 6 As shown, the vacuum pumping device in Embodiment 2 includes a vacuum pump 29 and a vacuum pressure sensor 30 arranged on the vacuum pump; both the vacuum pump and the vacuum pressure sensor are electrically connected to the controller; Step 200 in Embodiment 1 is replaced by the following steps:

[0088] Step 10. The operator connects the first connector to the car inflation valve, the controller controls the third solenoid valve to connect to the high-pressure air tank, the fourth solenoid valve to connect the pressure reducing valve and the reference tank, and the fifth solenoid valve to connect the pressure reducing valve to the car Inflatable valve, air enters the reference tank and the air storage tank of the tested car respectively;

[0089] Step 20: When the pressure values ​​detected by the third, fourth, and fifth pressure gauges are all greater than L, the controller controls the third solenoid valve to disconnect from the high-pressure...

Embodiment 3

[0096] In Example 3, such as Figure 4 , Image 6 As shown, a pressure difference sensor 31 is provided between the fourth pressure gauge and the fifth pressure gauge, the output end of the pressure difference sensor is electrically connected to the amplifier 32, and the output end of the amplifier is electrically connected to the controller and the second display 33 respectively; The step 230 is replaced by the following steps:

[0097] If A<the lower limit of the first pressure 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 connected to the pressure reducing device;

[0098] When the pressure values ​​detected by the fourth and fifth pressure gauges are both greater than H, the controller controls the communication between the pressure reducing device and the high-pressure air tank to be disconnected, and the fourth and fifth solenoid valves ar...

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Abstract

The invention discloses a gas tightness detection and nitrogen gas replacement system of a dual-fuel automobile and a controlling method thereof. The gas tightness detection and nitrogen gas replacement system is characterized in that a high-pressure gas storage device is used for storing high-pressure air and high-pressure nitrogen gas before gas tightness detection and nitrogen gas replacement, after the high-pressure air and the high-pressure nitrogen gas are stored, gas tightness detection and nitrogen gas replacement can be continuously performed by the stored gas in a certain time; when pressure values detected by a first pressure gauge and pressure values detected by a second pressure gauge are lower than corresponding lower limiting values in a standard pressure range; a high-pressure air tank is firstly aerated, and then a high-pressure nitrogen gas tank is aerated after aeration completion of the air tank. According to the system and the method, the gas tightness detection precision, the intelligent level, and the gas tightness detection and nitrogen gas replacement efficiency are high.

Description

Technical field [0001] The invention relates to the technical field of dual-fuel vehicles, in particular to a dual-fuel vehicle air-tightness detection and nitrogen replacement system with high air-tightness detection accuracy and high detection and nitrogen replacement efficiency and a control method thereof. Background technique [0002] With the increase in oil prices and increased awareness of environmental protection, dual-fuel vehicles are becoming more and more popular among consumers. In particular, CNG dual-fuel, which is affordable and mature in technology, has become the first choice for households and rental operators. With the increase in the demand for CNG vehicles, the original airtightness testing and nitrogen replacement technology, equipment and testing efficiency of CNG vehicles have been unable to meet the demand for mass production of dual-fuel vehicles, and cannot provide consumers with safer and more reliable products. CNG vehicle. [0003] The current air t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/32
Inventor 李书涛顾伟明
Owner ZHEJIANG GEELY HLDG GRP CO LTD
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