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Fuel oil signal processing method

A signal processing and fuel technology, applied in liquid/fluid solid measurement, engine lubrication, buoy liquid level indicator, etc., can solve the problem of inconsistent display of fuel gauge before and after parking, and achieve the effect of solving the problem of inconsistent display and reducing complaints

Inactive Publication Date: 2014-01-22
CHONGQING CHANGAN AUTOMOBILE CO LTD
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Problems solved by technology

Therefore, the traditional fuel gauge without signal processing will show inconsistencies in the fuel gauge display before and after parking in this road condition, which will give users the false impression that the car is not using fuel but less fuel, which will cause users to complain.

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  • Fuel oil signal processing method

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Embodiment Construction

[0010] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0011] The specific processing method is to analyze the fuel input signal first. Generally, there are two most common fuel input signals, namely the analog input resistance signal and the PWM pulse width modulation signal. For the processing of the analog signal, the A / D input port of the single-chip microcomputer is used. First, the peripheral circuit of the single-chip microcomputer converts the analog input resistance signal into an analog voltage signal, and then the single-chip microcomputer performs analog-to-digital conversion on the voltage signal to become a processable digital signal. For the processing of the PWM pulse width modulation signal, the processing method of the internal interrupt counter of the microcontroller is used to obtain the required duty cycle. For these two kinds of input signals, they are converted into digital signals in...

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Abstract

A fuel oil signal processing method comprises the following steps: first, fuel oil data are recorded every time ignition is turned off; second, fuel oil data are collected immediately when the ignition is turned on again and are compared with the fuel oil data before the ignition is turned off; third, if it is detected that the difference value between the fuel oil data acquired when the ignition is turned on and the fuel oil data before the ignition is turned off is larger than 5L, a refueling mode is switched on, and a meter quickly responds to the current state; otherwise, it is considered that a vehicle is parked on a slope, then, the meter is turned into an oil consumption mode, and the meter displays a numerical value before the ignition is turned off. The fuel oil signal processing method solves the problem that in a non-refueling state, the numerical values displayed by a fuel meter are inconsistent before and after the vehicle is parked, and complaints about fuel consumption of the vehicle by users are reduced.

Description

technical field [0001] The fuel signal processing method of the present invention specifically relates to a signal processing method of a fuel gauge before and after parking in a non-refueling state. Background technique [0002] The fuel gauge is one of the most difficult gauges to deal with in the car instrument. There is a floating float in the fuel tank that will change with the change of the oil level. The change of the float changes the resistance value of the fuel sensor, and the instrument indicates according to the resistance value of the sensor. The user parks on the downhill immediately after driving uphill for a long time. When the power is turned on again, there will be a large difference in the amount of fuel when driving. Therefore, the traditional fuel gauge without signal processing will show inconsistencies in the fuel gauge display before and after parking in this road condition, which will give users the false impression that the car is not using fuel but...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F23/30G01F23/00
Inventor 胡晓娇
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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