Fuel economy in winter or summer?

Whether it is fuel-efficient in winter or summer, I often hear taxi drivers or Didi masters say that business is really bad in summer, but friends in the north are dissatisfied. It is said that driving in winter is more fuel-efficient than driving in summer, so is it fuel-efficient in winter or summer?

Fuel saving in winter or summer 1 The fuel consumption in winter is indeed slightly higher than that in summer.

Three factors lead to high fuel consumption in winter.

1. The hot air in the car makes the engine do extra work.

Many car owners have misunderstandings about using air conditioners in their cars in winter, and blowing hot air in summer consumes more fuel than blowing cold air. Theoretically speaking, the hot air will not start the air conditioner compressor, but will send the hot air from the engine water tank to the cab, thus heating up the room. On the surface, many people think that this hot air will be generated even if it is not used, and there is no extra energy consumption and no extra fuel consumption.

In fact, the hot air in the engine water tank can really warm the cab, but if the hot air is insufficient, the engine will have to do extra work to generate more heat energy to meet the temperature requirements of the cab, and then it will consume extra fuel. In addition, when the vehicle is started after being fully warmed up, although the water temperature is normal, hot air has not been fully generated. If the hot air is turned on immediately, it will force the engine to do passive work, supply heat in advance, and increase additional fuel consumption.

The thermal efficiency of gasoline is not as good as that in summer.

One of the main reasons for high fuel consumption in winter is that temperature reduces the thermal efficiency of gasoline. Some experts said that under normal circumstances, the engine needs to be maintained at room temperature, which is roughly 80℃ ~ 90℃. If the temperature is too high, the cooling system of the engine will automatically increase the water circulation speed, increase heat dissipation and take away excess heat; On the contrary, reduce the circulating speed of cooling water and keep the necessary temperature.

This is also the most basic cooling principle of the engine. In winter, the engine needs heat preservation rather than heat dissipation. Due to the influence of flowing air, the temperature of the engine is not easy to keep around 80℃, which will increase the fuel injection and change the "ignition advance angle" to keep the temperature. At the same time, the thermal efficiency of gasoline in cold weather is not as good as that in summer, which makes the fuel consumption of cars in cold weather in winter higher than in other seasons.

3, hot car time is too long

Many riders, especially car owners, have long maintained the habit of hot car, but it must be noted that long hot car time and standby heating will increase fuel consumption. In addition, the reason for the increase in fuel consumption may be related to the water temperature or air temperature sensor, or the engine fuel consumption may be increased due to the failure of the air flow meter or other components of the electronic system at low temperature.

If the fuel consumption only increases by 1 ~ 2 liters, it is within the normal range, but if the fuel consumption increases by more than 5 liters per 100 kilometers, it is abnormal. Owners in similar situations should maintain their vehicles in time or go to professional repair shops for maintenance.

Fuel saving in winter or summer 2. Causes of high fuel consumption of automobiles in winter.

1, long preheating time

The warm-up time in winter is definitely longer, and the fuel utilization rate during warm-up is definitely lower than that during normal driving. This is only one factor that leads to the increase in fuel consumption, not the main one. Of course, if the car is warmed up by mistake, it may become a main reason for the high fuel consumption in winter.

2. Cold start consumes more fuel.

We know that fuel will produce energy after burning. In fact, only about 1/3 does work to drive the car, and 1/3 is discharged with the exhaust gas. Finally, this 1/3 is absorbed by cooling water. Compared with other seasons, it is more obvious than summer, that is, it is time for cold start. The cooling water temperature in winter is definitely lower than that in summer.

When the engine reaches the normal operating temperature, the cooling water in winter will definitely take away more energy and need more fuel for combustion. According to some data, the fuel consumption of cold cars is usually 3-4 times that of normal cars. Even after the cold car runs for one kilometer, the fuel consumption of the vehicle is still about twice as high as usual.

The engine needs to consume more fuel to keep the temperature.

Just like the human body, our normal living temperature is 37℃. In winter, we need to generate more heat to resist the cold and keep our normal body temperature. The same is true for engines, and the normal operating temperature is 85℃~ 105℃. If the temperature is low, the on-board computer will be informed to increase the fuel injection, so it is easy to increase fuel consumption by doing some actions to increase the ventilation in the car in winter.

Fuel economy in winter or summer? Generally, the fuel consumption is higher in summer, because the use of air conditioning in summer consumes part of the engine power, which will lead to an increase in fuel consumption. Although air conditioning is also used in winter, there is no need for an engine to drive the compressor when heating, so the fuel consumption in winter is not as high as that in summer.

The temperature is relatively high in summer, so the oxygen content in the air will decrease, which is also one of the reasons for the increase of fuel consumption in summer.

In summer, you have to turn on the car air conditioner almost every day, and some riders will open the window.

When the automobile air conditioner cools, the engine will drive the compressor to run. At this time, the compressor can continuously compress the refrigerant and deliver it to the evaporation box, where the refrigerant expands and absorbs heat to cool the evaporation box.

The cooling evaporation box can cool the wind from the blower, so that the air outlet of the automobile air conditioner can blow out cold air.

When the automobile air conditioner heats, the high-temperature coolant in the engine will flow through the warm air tank, and the wind from the blower will also flow through the warm air tank, so that the air outlet of the automobile air conditioner can blow out warm air.

If the air conditioner is used improperly in winter, it will also lead to an increase in engine fuel consumption.

It is recommended not to turn on the air conditioner when the engine is just started in winter, and turn on the air conditioner after normal driving 10 to 20 minutes.

Turning on the air conditioner as soon as the engine is started will slow down the temperature rise of the engine and lead to an increase in fuel consumption.

Fuel saving in winter or summer 4. Cars consume more fuel in winter than in summer for the following reasons:

1, the engine needs to reach a certain temperature to achieve a good working condition.

The good working condition of the engine requires a certain temperature, generally around 90 degrees. Only when the engine is in good working condition will the fuel consumption be normal. In winter, the outdoor temperature is relatively low, and after the engine is running, the running time is longer to achieve the best working condition. So the fuel consumption will increase compared with other seasons.

2. The car engine has too much carbon deposit.

Without the burning of gasoline, cars can't run. However, gasoline is more or less mixed with some impurities. Long-term accumulation will form a certain amount of carbon mud on the engine surface, which is not only a kind of damage to the engine, but also easy to cause problems such as difficult starting, high idle speed and excessive exhaust gas, and will increase the fuel consumption of the automobile.

Extended data:

Fuel-saving method

1, protect the best fuel supply advance angle Take the most commonly used 195 diesel engine as an example, and the best fuel supply advance angle is 16-20 degrees. After the diesel engine is used for a period of time, due to wear and tear, the fuel supply advance angle will be reduced, leading to the late fuel supply time and a substantial increase in fuel consumption. Therefore, it is necessary to ensure that the oil supply angle is at the best angle.

2. Ensure that the machine does not leak oil. The diesel pipeline often leaks oil due to uneven joint surface, gasket deformation or damage. The treatment method is as follows: the gasket is painted with valve paint, polished on the glass plate, and the tubing joint is corrected; Adding a diesel oil recovery device, the oil return pipe on the nozzle can be connected with the hollow screw with a plastic pipe to make the oil return flow into the oil tank.