通常沼氣發電機組會出現以下問題：

Usually, biogas generators encounter the following problems:

1.啟動困難 出現該故障，首先應檢查混合器是否有沼氣進入沼氣發電機，沼氣供給系統是否有故障，檢查混合氣是否符合質和量的要求。然后檢查所有缸線是否跳火，逐步檢查點火系統、12V電源系統等是否工作正常，具體步驟如下：

1. If the fault occurs due to difficulty in starting, the first step is to check whether there is biogas entering the biogas generator in the mixer, whether there is a malfunction in the biogas supply system, and whether the mixed gas meets the quality and quantity requirements. Then check if all cylinder wires are sparking, and gradually check if the ignition system, 12V power supply system, etc. are working properly. The specific steps are as follows:

1)檢查沼氣裝置或電路是否有故障，ECU電源打開后，減壓器電磁閥應有“喀噠”響聲。2)檢查12V繼電器是否良好。

1) Check if there is a malfunction in the biogas device or circuit. After the ECU power is turned on, the pressure reducer solenoid valve should make a clicking sound. 2) Check if the 12V relay is in good condition.

3)檢查沼氣管路是否暢通，閥門是否開啟。

3) Check if the biogas pipeline is unobstructed and if the valve is open.

4)檢查鋼瓶是否有氣。

4) Check if there is gas in the steel cylinder.

5)檢查混合氣濃度是否過濃或過稀，調整混合器上的怠速濃度調整螺釘，順時針混合氣加濃，反時針混合氣變稀，或加或取一張混合器膜片銅墊片。加銅墊片混合氣變稀,減銅墊片混合氣變濃。

5) Check if the mixture concentration is too rich or too thin, adjust the idle concentration adjustment screw on the mixer, increase the mixture concentration clockwise, decrease the mixture concentration counterclockwise, or add or remove a mixer diaphragm copper gasket. Dilute the mixture with copper gaskets, and thicken the mixture with copper gaskets.

6)檢查高壓線跳火性能，檢查高壓線是否漏電。

6) Check the ignition performance of the high-voltage line and check if there is any leakage in the high-voltage line.

7)檢查線束插接件是否可靠。

7) Check if the wiring harness connectors are reliable.

8)檢查曲軸轉角信號傳感器是否良好。

8) Check if the crankshaft angle signal sensor is in good condition.

9)檢查整車電源及電壓變換器輸出電壓是否符合要求。

9) Check whether the output voltage of the vehicle power supply and voltage converter meets the requirements.

10)檢查蓄電瓶電壓是否過低、連接是否正常。

10) Check if the voltage of the battery is too low and if the connection is normal.

11)檢查火花塞電間隙是否正常，有無積炭。

11) Check if the spark plug electrode gap is normal and if there is any carbon buildup.

12)檢查空氣濾清器是否良好，進氣管路是否暢通。

12) Check if the air filter is in good condition and if the intake pipeline is unobstructed.

13)檢查起動機是否工作正常。

13) Check if the starter is working properly.

14)檢查ECU是否工作正常。

14) Check if the ECU is working properly.

2.沼氣發電機動力下降

2. The power of the biogas generator decreases

首先要按沼氣發電機的檢查方法排查一下沼氣發電機的工作情況，斷缸試驗，看是否個別缸不工作或工作不好，每缸作比較；有無氣缸漏氣現象；氣門間隙是否正常。在確定上述部位沒有故障，判定故障可能發生在沼氣裝置上。故障排除方法：

Firstly, the working condition of the biogas generator should be checked according to the inspection method of the biogas generator, and a cylinder cut-off test should be conducted to see if individual cylinders are not working or working properly. Each cylinder should be compared; Whether there is any cylinder leakage phenomenon; Is the valve clearance normal. After confirming that there is no fault in the above parts, it is determined that the fault may have occurred on the biogas plant. Troubleshooting method:

1)沼氣動力閥間隙太小，沼氣流量不夠，混合氣過稀。調整動力閥，國Ⅲ系列沼氣發電機的動力閥裝在減壓器出氣口，動力閥有刻度，R(-)方向為減小，L(+)方向為增大。

1) The gap between the biogas power valve is too small, the biogas flow rate is insufficient, and the mixture is too thin. Adjust the power valve. The power valve of the National III series biogas generator is installed at the outlet of the pressure reducer. The power valve has a scale, with the R (-) direction indicating a decrease and the L (+) direction indicating an increase.

2)檢查沼氣過濾器有無堵塞。

2) Check for blockages in the biogas filter.

3)檢查壓力平衡管是否漏氣或破損。

3) Check if the pressure balance pipe is leaking or damaged.

4)增壓中冷系統是否有漏氣，檢查排氣管墊、增壓器接口、中冷器、混合器、進氣管及各連接硅膠管，增壓器有無損害。

4) Check if there is any air leakage in the turbocharged intercooling system, inspect the exhaust pipe gasket, turbocharger interface, intercooler, mixer, intake pipe, and all connecting silicone pipes, and check if the turbocharger is damaged.

5)排氣管道或三元催化器堵塞，致排氣阻力增大。

5) Blockages in exhaust pipes or three-way catalytic converters result in increased exhaust resistance.

6)檢查空氣濾清器是否良好，進氣管路是否暢通。

6) Check if the air filter is in good condition and if the intake pipeline is unobstructed.

7)檢查沼氣步進電機及減壓器出氣口到混合器之間的管路。

7) Check the pipeline between the biogas stepper motor and the pressure reducer outlet to the mixer.

8)混合器皮膜破損，不能形成合理的空燃比，更換皮膜。

8) The mixer film is damaged and cannot form a reasonable air-fuel ratio. Replace the film.

9)中低壓減壓閥二級閥片行程過小。

9) The second stage valve disc stroke of the medium and low pressure reducing valve is too small.

10)減壓器電磁閥閥芯、閥孔是否破損，進氣量不夠，更換電磁閥。

10) Check if the valve core and valve hole of the pressure reducer solenoid valve are damaged, and if the air intake is insufficient, replace the solenoid valve.

11)檢查低減壓器的膜片、彈簧、桿桿有無損害。

11) Check for damage to the diaphragm, spring, and rod of the low pressure reducer.

3.耗氣量高

3. High gas consumption

沼氣發電機經過一段時間使用后，出現耗氣量過高的現象，這時要檢查沼氣發電機狀況。

After using the biogas generator for a period of time, if there is a phenomenon of high gas consumption, it is necessary to comprehensively inspect the condition of the biogas generator.

1)檢查沼氣發電機水溫是否低于80℃，使減壓器加熱不良，或減壓器循環水管被堵，造成減壓器有結冰，混合氣偏濃。

1) Check if the water temperature of the biogas generator is below 80 ℃, which may cause poor heating of the pressure reducer or blockage of the circulating water pipe of the pressure reducer, resulting in ice formation in the pressure reducer and a concentrated mixture of gas.

2)高低壓沼氣管線、混合器與節氣門連接處、進氣管、沼氣裝置及鋼瓶是否漏氣。

2) Check for leaks in high and low pressure biogas pipelines, mixer and throttle valve connections, intake pipes, biogas devices, and steel cylinders.

3)空氣濾清器是否干凈，進氣管路是否暢通。

3) Check if the air filter is clean and if the intake pipe is unobstructed.

4)混合器流量是否調整不當，使混合氣過濃。在保證正常啟動的情況下，再在混合器膜片上加0.1mm厚銅墊或適當關小功率閥。

4) Is the flow rate of the mixer adjusted improperly, causing the mixture to become too rich. Under the condition of ensuring normal startup, add a 0.1mm thick copper pad on the diaphragm of the mixer or reduce the power valve appropriately.

5)中冷增壓沼氣發電機減壓器出口壓力高，最高可達80Kpa，使用檢漏液檢查沼氣出口到進氣管之間各部件是否有漏氣，用壓縮空氣檢查。

5) The outlet pressure of the pressure reducer of the intercooled pressurized biogas generator is high, up to 80Kpa. Use leak detection liquid to check whether there is any leakage in the components between the biogas outlet and the intake pipe, and use compressed air to check.

6)低壓減壓器輸出壓力是否過高。

6) Is the output pressure of the low-pressure reducer too high.

7)檢查蓄電池電壓是否過低和點火系統是否有故障。

7) Check if the battery voltage is too low and if there is a malfunction in the ignition system.

8)斷缸法檢查各缸工作情況。

8) Check the working condition of each cylinder using the cylinder cut-off method.

9)所有沼氣發電機動力不足，均會引起耗氣量增加。上述檢查完成后，若仍沒有解決沼氣耗氣量高的問題，則可能是沼氣發電機技術狀況下降，需要檢查氣門間隙，各缸的氣缸壓力。

9) Insufficient power of all biogas generators will cause an increase in gas consumption. After the above inspection is completed, if the problem of high biogas consumption is still not solved, it may be due to a decline in the technical condition of the biogas generator. It is necessary to check the valve clearance and cylinder pressure of each cylinder.

4.熱車不易啟動

4. The hot car is not easy to start

有時沼氣發電機熄火后，馬上啟動會出現啟動困難，這時要檢查一下沼氣發電機的工作情況，看配氣系統、點火系統是否有故障，然后檢查下面幾項：

Sometimes, after the biogas generator is turned off, it may encounter difficulties in starting immediately. At this time, it is necessary to check the working condition of the biogas generator, see if there are any faults in the gas distribution system and ignition system, and then check the following items:

1)電磁閥過熱，閥芯卡滯或磁力下降。

1) The solenoid valve overheats, the valve core gets stuck or the magnetic force decreases.

2)電控插頭是否有接觸不良。

2) Is there any poor contact in the electrical control plug.

3)混合器閥芯是否有卡滯現象，使混合氣過濃、過稀。

3) Is there any jamming phenomenon in the mixer valve core, causing the mixture to be too rich or too thin.

4)減壓器輸出壓力是否過高，超出正常值。

4) Is the output pressure of the pressure reducer too high, exceeding the normal value.

5)檢查受溫度影響的部件。

5) Inspect components affected by temperature.

5.電磁閥打不開

5. The solenoid valve cannot be opened

減壓器電磁閥打不開的原因可能是以下幾點：

The reasons why the solenoid valve of the pressure reducer cannot be opened may be as follows:

1)電源未接通或電磁閥搭鐵不好，也可能是電壓過低，啟動時壓降過大，啟動時檢查電瓶電壓，電源變換器輸出電壓是否有12V。

1) If the power supply is not connected or the electromagnetic valve is poorly grounded, it may also be due to low voltage and excessive voltage drop during startup. Check the battery voltage during startup and whether the output voltage of the power converter is 12V.

2)磁線圈故障，開啟功率不足。

2) Magnetic coil malfunction, insufficient opening power.

3)閥芯通氣孔被堵。

3) The valve core vent is blocked.

4)ECU無輸出控制信號。

4) ECU has no output control signal.

5)閥芯和鐵心的配合間隙太小，閥芯不能自由滑動。

5) The clearance between the valve core and the iron core is too small, and the valve core cannot slide freely.

6)閥芯O形圈或橡膠墊損壞。

6) The O-ring or rubber gasket of the valve core is damaged.

6.怠速不穩

6. Unstable idle speed

沼氣發電機怠速運轉時，轉速忽快忽慢不穩定。在檢查點火系統沒有故障的情況下，故障可能發生在燃料供給系統、怠速步進電機失控，此時應檢查沼氣裝置及電機。

When the biogas generator is idling, the speed fluctuates greatly and is extremely unstable. If there is no malfunction in the ignition system, the malfunction may occur in the fuel supply system and idle stepper motor out of control. At this time, it is important to focus on inspecting the biogas device and motor.

1)進氣道是否有漏氣現象。

1) Is there any air leakage in the intake duct.

2)混合器空燃比調整是否合適。

2) Is the air fuel ratio adjustment of the mixer appropriate.

3)混合器閥芯有否卡滯現象。

3) Check if the mixer valve core is stuck.

4)混合器膜片是否破損漏氣，造成有高速無低速現象。

4) Is the diaphragm of the mixer damaged or leaking air, causing high-speed and low-speed phenomena.