The reason for the increase in fuel consumption of mixer trucks in winter is that the combustion stability and efficiency of the engine become worse.
In winter, when the temperature is low and the cold air encounters cold fuel, the combustion stability and efficiency of the engine will become poor: because the low temperature makes the specific gravity of diesel oil larger, it will be sprayed farther, so the chance of collision between diesel atomized particles and the cylinder wall is greater ( The low combustion efficiency of the entire combustion chamber is the cylinder wall); at the same time, the low temperature air will reduce the combustion pressure and combustion temperature.
Generally, after the electronically controlled diesel engine is started in a low temperature environment, there will be a low temperature protection measure: increase the idle speed, and some cars will not respond when they step on the accelerator at this time.
Reason 2 for increasing fuel consumption in winter: It will take a long time for the engine to enter the normal working water temperature
Under cold temperature conditions, the time for the engine to enter the normal working water temperature will also become longer. During the process of the engine water temperature gradually increasing, the fuel consumption will decrease with the increase of the temperature. The longer this time means that the total fuel consumption will also increase. .
It should be noted that increasing the water temperature is to increase the temperature of the cylinder wall. In order to fully save fuel, the water temperature (the temperature of the cylinder wall) cannot be made too low, no matter what season it is.
Reason 3 for increasing fuel consumption in winter: Is the selection of engine oil correct?
After the north enters September, all kinds of oil for special vehicles will also be changed to winter ones. My suggestion for oil is: take out your engine manual and see the corresponding usage conditions for oil and temperature environment above.
Generally, the general oil used in winter and summer is also called multi-grade oil. We know that the following number 30.40.50 is the viscosity grade, and the preceding numbers 0, 5, 10, and 15 all refer to the viscosity grade at the corresponding temperature in winter. Add -35°C to the previous number and it can be used. temperature.