Volvo excavator maintenance "4 fuel saving methods" explained in detail:
1 minimize vehicle resistance and speed up resistance.
If the speed is below 400km/h, the air resistance is negligible. The rolling resistance should be paid attention to. When the vehicle runs on the uneven pavement, the deformation of the suspension and the tires increases as a result of its frequent beating. The rolling resistance increases greatly, and the fuel consumption is increased by 30%-50% compared with the condition on the good road. At the same time, the effect of the tire pressure on the rolling resistance is also great. If the tire pressure is reduced on the hard pavement, the tire deformation is large and the rolling resistance is increased. If the tire pressure is reduced on the soft pavement, the contact surface of the tire and the ground increases and the pressure of the unit area drops, which will cause the rolling resistance. Therefore, in the construction, we should pay attention to the change of the road condition, choose the appropriate tire pressure to reduce the oil consumption. The transmission ratio of the vehicle transmission has a great influence on the fuel consumption. In the construction, we should try to choose the small speed gear with small transmission ratio, so that the fuel can be saved.
2 improve the compression ratio of the engine to the standard value.
The compression ratio of the diesel engine is generally between 16-22. The compression ratio is increased, the temperature and pressure in the final compression are increased, the combustion and expansion of the mixture will be improved, the heat efficiency of the engine is increased, the effective power is increased, the fuel consumption is reduced. The concrete measure is to reduce the resistance of the intake system. The filter should be cleaned and maintained in time and sufficient to ensure enough. The air enters the cylinder in a timely manner to keep the vehicle in good condition. For the cylinder pressure of the engine, the general diesel engine should not be less than 20% of the original standard pressure, and the gasoline engine is not less than 30%. for the pressure difference between each cylinder. Generally, the diesel engine is not more than 8% and the gasoline engine is not more than 10%. if the cylinder pressure can not reach the specified standard. It is necessary to grind the valve and replace the piston ring according to the needs. It should also be noted that the coke in the combustion chamber will make the compression ratio improve automatically, the high compression ratio and the coke can easily cause the cylinder to produce deflagration, and cause the fuel consumption to increase, so it is necessary to remove the carbon accumulation, and the clearance of the inlet and exhaust doors must be adjusted to the specified value. Too large and too small clearance will cause fuel consumption to increase.
The oil supply advance angle of the 3 engine is good. The fuel consumption of the engine can be increased by too big or too small advance angle of fuel supply. Therefore, to make the engine have good performance, the oil supply advance angle must be calibrated.
4 reduce unit load oil consumption. When the vehicle condition is allowed, the weight of the vehicle is raised to the rated load, the productivity can be increased and the fuel consumption per unit weight can be reduced significantly.
