GFS EVO-SP dual fuel retrofit complete solution

The substitution rate is 60%, which means saving 126 kg of diesel fuel per hour and saving 756 yuan in costs.

The increase in natural gas consumption is about 130 m ³, resulting in an additional cost of 390 yuan calculated at 3 yuan/m ³.

Net savings: 756-390=366 yuan/hour.

Annual operation of 1000 hours saves 366000 yuan.

The investment in renovating equipment can usually be recovered within one year and will continue to generate profits thereafter.

6.3 Precautions for operation and maintenance

Regularly calibrate sensors, especially exhaust temperature and knock sensors, and check them every 500 hours.

Check the gas valve group: Test the switching action of the dual solenoid valves quarterly to ensure normal operation.

Cleaning mixer: Trace impurities in the gas may deposit on the throttle body, affecting the accuracy of air-fuel ratio control.

Software upgrade: ECU can update control algorithms through USB port. It is recommended to pay attention to the optimized version released by the manufacturer.

Pure diesel mode test: Switch to 100% diesel for at least 30 minutes every month to ensure that the original engine fuel system is in good condition.

Common problems and troubleshooting

7.1 Difficulty starting the engine

Reason: The gas valve is not open (due to power supply failure of the solenoid valve); Mixer stuck; Insufficient natural gas pressure.

Solution: Check the 24V power supply and insurance; Manually test valve action; Confirm that the pipeline pressure is within the range of 3-7 PSI.

7.2 Insufficient power or jitter under high load

Reason: Excessive gas substitution rate leads to lean combustion; The intake temperature is too high; Turbocharger response lags behind.

Solution: View real-time substitution rate and air-fuel ratio curve through touch screen; Contact the manufacturer to adjust the fuel mapping; Check the efficiency of the intercooler.

7.3 Frequent combustible gas alarms

Reason: Trace leakage in gas pipeline; The crankcase blow by gas contains methane; There are other volatile organic compounds in the environment.

Solution: Check all joints with soapy water; Check if the crankcase ventilation pipe is blocked; Calibrate the detector threshold.

7.4 Frequent switching to diesel mode

Reason: A certain safety parameter exceeds the limit (such as high exhaust temperature, detonation, and large vibration).

Solution: Enter the diagnostic interface to view the sensor channel that triggered the last switch, and check the sensor and engine mechanical status in a targeted manner.

7.5 Touch screen no display

Reason: Lack of 24V power supply; Screen backlight aging; The communication line is broken.

Solution: Measure the 24V voltage inside the control cabinet; Check insurance; If powered separately, confirm that the power module output is normal.