Causes of high fuel consumption of automobiles

Question 1: What is the reason for the high fuel consumption of automobiles? The first reason for the high fuel consumption of automobiles is the low driving skills. The same car, different people have different fuel consumption. Only by summing up experience and improving driving level can we solve the problem of high fuel consumption caused by driving technology. Tall and straight

The second reason for the high fuel consumption of automobiles is that there are problems with the spark plugs and high-voltage lines of gasoline vehicles, resulting in abnormal ignition circuits. Therefore, high fuel consumption can be solved by overhauling and replacing another part.

The third reason for the high fuel consumption of automobiles is that there is something wrong with the brake system, the brake pads do not return, and the driving resistance increases. Oil consumption can be reduced through maintenance and recycling.

The fourth reason for the high fuel consumption of automobiles: the automobile oil circuit is not smooth and the carbon deposit is blocked. Clean the fuel nozzle and throttle with fuel cleaner. Can reduce fuel consumption.

The fifth reason for the high fuel consumption of cars is that the air filter is dirty and the air is not smooth, which leads to the wrong oil-gas ratio. The filter element needs to be replaced.

The sixth reason of high fuel consumption of automobiles: high fuel consumption is caused by high temperature and humidity in summer and seasonality.

The seventh reason for the high fuel consumption of automobiles: fast driving speed, heavy automobile load and high fuel consumption.

The eighth reason for high fuel consumption of automobiles: gasoline quality is not up to standard, which leads to high fuel consumption.

The ninth reason of high fuel consumption of automobiles: metal wear. After running in for 2,000 kilometers, the surface roughness of cylinder wall and piston ring can be reduced to Ra=0.2 micron, the clearance between cylinder and piston is also the smallest, the valve seal is also the strictest, and the fuel consumption of automobile is naturally the least. After the average domestic car travels 50000- 100000 km, the metal friction surface is gradually worn and uneven. At this time, the wear rate is several times to ten times higher than that of a new car. After the metal is worn, the gap between other parts increases, the friction resistance increases, and the cylinder pressure decreases, which inevitably leads to oil channeling and gas channeling. Loss increases, efficiency decreases, power performance decreases, and automobile fuel consumption naturally increases. Some cars even consume 20-30% more fuel than new cars. In order to restore the high fuel consumption of a car to the standard of a new car, the most effective way in the past was to overhaul the boring cylinder and replace the piston and piston ring. Restore the dimensions of the original car parts. But the cost is high and the time is long. Recently, there is a new technology, which can improve the power and reduce the fuel consumption with extremely low wear and tear (approximately zero) when the car travels 654.38+ 10,000 kilometers.

Surgery has been widely used. Fine running-in and metal self-repair technology of cermets in xinba. The fine running-in technology of NWFB is suitable for new cars after 2000 km running-in. After use, the surface roughness of cylinder wall and piston ring changes.

The smaller one can reach Ra=0.02 micron, which is 10 times different from the unfinished one, and the friction resistance is reduced by 50-80%. It is also reasonable to solve the problem of high fuel consumption caused by large friction resistance of parts.

The metal self-repairing technology of NWFB is suitable for vehicles with unburned engine oil of 200-65438+100000 km, and can self-repair the cylinder pressure drop caused by cylinder wear. The most obvious effect is to restore power and let the car with high fuel consumption return to the level of a new car.

Question 2: What is the reason for the high fuel consumption of automobiles? The first reason for the high fuel consumption of automobiles is the low driving skills. The same car, driven by different people, has different fuel consumption. Only by summing up experience and improving driving level can we solve the problem of high fuel consumption caused by driving technology.

The second reason for the high fuel consumption of automobiles is that there are problems with the spark plugs and high-voltage lines of gasoline vehicles, resulting in abnormal ignition circuits. Therefore, high fuel consumption can be solved by overhauling and replacing another part.

The third reason for high fuel consumption is that there is something wrong with the brake system, the brake pads do not return, and the driving resistance increases. Oil consumption can be reduced through maintenance and recycling.

The fourth reason for the high fuel consumption of automobiles: the automobile oil circuit is not smooth and the carbon deposit is blocked. Clean the fuel nozzle and throttle with fuel cleaner. Can reduce fuel consumption.

The fifth reason for the high fuel consumption of cars is that the air filter is dirty and the air is not smooth, which leads to the wrong oil-gas ratio. The filter element needs to be replaced.

The sixth reason of high fuel consumption of automobiles: high fuel consumption is caused by high temperature and humidity in summer and seasonality.

The seventh reason for the high fuel consumption of automobiles: fast driving speed, heavy automobile load and high fuel consumption.

The eighth reason for high fuel consumption of automobiles: gasoline quality is not up to standard, which leads to high fuel consumption.

The ninth reason of high fuel consumption of automobiles: metal wear. After running in for 2,000 kilometers, the surface roughness of cylinder wall and piston ring can be reduced to Ra=0.2 micron, the clearance between cylinder and piston is also the smallest, the valve seal is also the strictest, and the fuel consumption of automobile is naturally the least. After the average domestic car travels 50000- 100000 km, the metal friction surface is gradually worn and uneven. At this time, the wear rate is several times to ten times higher than that of a new car. After the metal is worn, the gap between other parts increases, the friction resistance increases, and the cylinder pressure decreases, which inevitably leads to oil channeling and gas channeling. Loss increases, efficiency decreases, power performance decreases, and automobile fuel consumption naturally increases. Some cars even consume 20-30% more fuel than new cars. In order to restore the high fuel consumption of a car to the standard of a new car, the most effective way in the past was to overhaul the boring cylinder and replace the piston and piston ring. Restore the dimensions of the original car parts. But the cost is high and the time is long. Recently, there is a new technology, which can improve the power and reduce the fuel consumption with extremely low wear and tear (approximately zero) when the car travels 654.38+ 10,000 kilometers.

Surgery has been widely used. Fine running-in and metal self-repair technology of cermets in xinba. The fine running-in technology of NWFB is suitable for new cars after 2000 km running-in. After use, the surface roughness of cylinder wall and piston ring changes.

The smaller one can reach Ra=0.02 micron, which is 10 times different from the unfinished one, and the friction resistance is reduced by 50-80%. It is also reasonable to solve the problem of high fuel consumption caused by large friction resistance of parts.

The metal self-repairing technology of NWFB is suitable for vehicles whose engine oil has not burned out by 20-65,438 438+ 10/00000 km. It can self-repair the cylinder pressure drop caused by cylinder wear, and the most obvious function is to restore power and make the vehicle with high oil content return to the new car level.

Question 3: The reason for the obvious increase in automobile fuel consumption. The sudden increase of automobile fuel consumption by 20 points is generally due to the following reasons:

1. If you find that the sliding distance of your car is obviously reduced during driving, you should check whether the tire pressure meets the air pressure standard. If the tires are under-inflated, the fuel consumption will also increase.

Tip: Inflate the tire at the right time.

2. Check the degree of tire wear. If the tire is badly worn, it will often slip and increase fuel consumption.

Tip: If necessary, you can replace the tire with a new one.

3. If abnormal noise is found in the wheels during driving or starting, check whether the bearing and braking system are faulty in time. If the wheel rotates abnormally, it will affect the speed and increase fuel consumption.

Tip: overhaul the bearing and brake system.

4. Clutch slippage will reduce the engine speed. When it is found that the engine tachometer increases rapidly during rapid acceleration, but the vehicle speed increases slowly, it can be judged that the clutch is slipping.

Note: The clutch plate, clutch pressure plate and driving wheel need to be replaced.

5. When the car travels 200,000 to 300,000 kilometers, there is usually a phenomenon of insufficient cylinder pressure, and the fuel consumption will increase obviously.

Tip: If this fault really occurs, then the engine needs to be overhauled.

6. The exhaust pipe emits black smoke and the fuel consumption increases, so it is necessary to check the carburetor.

Tip: If the carburetor is too dirty, you can spray the cleaning agent directly to the intake of the carburetor. If there is still black smoke at this time, the carburetor will have to be disassembled and cleaned.

7. If the spark plug is used for too long, the fuel consumption will also increase. Because the damage of spark plug will reduce the ignition energy and slow down the vehicle speed, resulting in a significant increase in fuel consumption.

Tip: It's time to change the spark plug.

8. When the temperature control switch and thermostat of the car are damaged, the fuel consumption will increase. Because the temperature control switch and thermostat are damaged, the water temperature will drop, and the carburetor will not work normally, resulting in poor gasoline atomization and obvious increase in fuel consumption.

Tip: Replace faulty parts.

Question 4: How are you? Excessive fuel consumption is not only related to actual road conditions, personal driving habits, weather temperature and vehicle load, but also related to the working performance of the engine itself!

One is poor ignition. The spark plug gap is too large, and the ignition coil energy is not enough!

Second, the nozzle atomization is poor, the fuel pressure regulator is faulty, the fuel pressure is too high, and the nozzle leaks oil!

Third, there is too much carbon deposit in the engine, and some of the gasoline sprayed out is absorbed by the carbon deposit, resulting in waste!

Fourth, sensor failure, such as water temperature sensor failure, will cause the engine to mistakenly think that it is in a cold state, and will always send out fuel injection signals, resulting in high fuel consumption! If the oxygen sensor fails and the fuel correction is invalid, the computer will always send out the signal of fuel injection! Failure of air flow meter will lead to incorrect intake data!

Solution: Replace the spark plug! Clean up the oil circuit, clean up the carbon deposit! Check the data flow with a computer, confirm the sensor failure, and then replace it as appropriate! If there is something wrong with the car, ask the car master. 4S shop professional technician, 10 minutes to solve.

Question 5: What is the reason for the sudden increase in fuel consumption of automobiles? Oxygen sensors are the most likely, and fuel consumption will increase in cold weather. The engine power is good, but the fuel consumption has increased greatly. Sometimes when accelerating, the exhaust pipe emits black smoke, which should be an engine failure. There are many possible failure reasons, usually the following: 1) water temperature sensor failure; 2) The air flow meter or intake manifold pressure sensor fails; 3) The throttle position sensor is faulty; 4) The fuel pressure is too high; 5) For the engine equipped with cold start injector, it may be that the cold start injector leaks oil or the cold start control is abnormal; 6) The fuel injector leaks oil; 7) Spark plug aging or carbon deposition; 8) Ignition coil failure. According to the above possible fault points, the fault diagnosis and elimination are as follows: 1) Test the water temperature sensor, and its resistance values at different temperatures should meet the standards. If the resistance is too large, the computer will mistakenly think that the engine is in a low temperature state, thus controlling the enrichment of cold cars and increasing fuel consumption. It can also be detected by a computer fault detector, which can display the water temperature value represented by the signal sent by the water temperature sensor to the computer when the engine is running; Comparing this value with the actual water temperature of the engine can directly reflect whether the water temperature sensor works normally. 2) Check the absolute pressure sensor of air flow meter or intake manifold, and its value should meet the standard. The error of air flow meter or intake manifold pressure sensor will directly affect the fuel injection quantity. If the test result is abnormal, replace the absolute pressure sensor of the air flow meter or intake manifold. 3) Check the throttle position sensor. When the throttle valve is in the middle or small opening, the contact fire of the full load switch should be turned off. If the full-load switch contacts are always closed or the closing time is too early, the computer will always or prematurely fill the load, thus increasing fuel consumption. 4) Measure the fuel pressure. The fuel pressure at idle speed shall meet the specified value. With the opening of the throttle, the fuel pressure should gradually increase, and the fuel pressure at full throttle is about 50kPa higher than that at idle speed. If the fuel pressure can change with the change of throttle opening, but the pressure is always high, it means that the oil pressure regulator is faulty and should be replaced. If the fuel pressure cannot change with the throttle opening, it means that the vacuum hose of the oil pressure regulator is broken or has fallen off. If the solenoid valve of fuel pressure regulation control is faulty, the vacuum degree of the intake pipe does not act on the vacuum diaphragm chamber of the oil pressure regulator, resulting in high oil pressure. In this regard, the hose or solenoid valve should be replaced. 5) In order to facilitate cold start, some early EFI vehicles installed cold start injectors. For such vehicles, check whether the cold start injector control is normal. Connect the multimeter voltage block or test lamp to the wire harness plug of the cold start injector, and check whether the working duration of the cold start injector meets the standard value when the engine is started. If the working time is too long or it keeps working after starting, it means that the cold start fuel injection control is abnormal, and the cold start temperature time switch and control circuit should be checked. 6) Remove the fuel injectors and check whether each fuel injector leaks oil. If there is any abnormality, clean or replace the fuel injector. 7) Remove the spark plug and check whether the spark plug is in good condition. If it is abnormal, it can be cleaned, adjusted or replaced. 8) Check whether the ignition coil of each cylinder is normal, generally by detecting the resistance. If any abnormality is found, replace the ignition coil. It can be seen that a fault phenomenon of an automobile may be related to a variety of fault causes, but it is impossible to accurately judge the specific fault source according to the symptoms and phenomena. The vehicle must be carefully inspected to finally determine the cause of the fault, so as to finally repair the fault.

Question 6: What is the reason for the increase in vehicle fuel consumption? If you feel that the fuel consumption of the vehicle has increased, you should first go to the maintenance center to monitor the engine electronic data and detect the vehicle exhaust, and make a diagnosis according to the following ideas:

1), tire inflation: if the tire deflates, it will lead to increased driving resistance and fuel consumption; On the contrary, if the tire pressure is appropriately increased within the specified value, it will be beneficial to reduce fuel consumption.

2) Tire pattern: Different types of tires have different fuel consumption rates, so choosing serrated tires is helpful to save fuel.

3) Four-wheel alignment: Always keep the wheel alignment value correct, which can ensure a low fuel consumption rate.

4) Driving environment: The lower the time share of idle speed and low gear in the whole driving cycle, the more favorable it is to reduce fuel consumption. Therefore, the fuel consumption of congested roads in urban areas remains high.

5) Road conditions: The greater the road resistance, the more uphill and downhill road conditions, and the higher the fuel consumption rate. So try to choose a smooth road.

6) Vehicle load: Minimize unnecessary items in the car and trunk, which will help reduce fuel consumption.

7) Steady acceleration: The instantaneous fuel consumption rate during sudden acceleration is half higher than that during steady acceleration, and sudden acceleration and emergency braking should be avoided as much as possible.

8) Moderate vehicle speed: define economic vehicle speed. If the vehicle speed is too high or too low, the fuel economy of the vehicle will remain unchanged.

9) Technical condition of the engine: If the technical condition of the engine is not good, the engine power will drop, resulting in a lot of fuel waste.

10), automatic transmission: ensure the normal shift of automatic transmission.

1 1), transmission system: regularly check whether the rotation resistance of transmission shaft, differential, half shaft, tire bearing and other components is normal.

12), braking system: check to ensure that the braking system is not delayed.

13), gear oil viscosity: In low temperature environment, replacing gear oil in manual transmission and differential with lower viscosity label is helpful to save fuel.

14), drag coefficient: If the appearance of the vehicle is damaged, the window is opened, or it is enlarged due to improper modification.

Question 7: Find a repair shop to check the fuel injection quantity of the fuel injector, clean up the carbon deposit in the combustion chamber and so on. In addition, you need to maintain high quality oil products. Don't make do with the car, you will make do with the car and the car will do with you. In addition, the common fault of Chery car is that the fuel consumption of the new car is ok in the first two years, and once this time is over, the fuel consumption is amazing.

Question 8: Cars consume a lot of fuel. What is the main reason? The main reason is that the displacement plays a key role, followed by the usual driving habits (such as low-grade high throttle or untimely shifting), the poor condition of the car itself, water or impurities in the fuel, poor road conditions, insufficient tire pressure and other factors! Several key factors related to fuel consumption and measures: strive to reduce the self-weight of vehicles. The weight of the car is directly proportional to the fuel consumption. It is said that every 65,438+00% reduction in vehicle weight will reduce fuel consumption by several percentage points. If the drag coefficient of the improved car body is small, the fuel consumption will be obviously reduced. The relationship between the two is also proportional. Try to improve the thermal efficiency of the engine. At present, the thermal efficiency of general gasoline engines (that is, the ratio of fuel to useful work) has reached more than 30%, while the thermal efficiency of diesel engines has exceeded 40%, which is the main reason why diesel engines consume less fuel than gasoline engines. Good car condition is the basis of fuel saving. Wheel bearings should be oiled on time. If the wheel bearing is short of oil, the friction will increase and the fuel consumption will also increase. Some cars have poor brakes, and the brake pads and brake drums are rubbing, so the fuel consumption will naturally increase. Abnormal wheel alignment will cause abnormal tire wear, which is also a reason for the increase of fuel consumption. Abnormal ignition system of engine also has a great influence on fuel consumption, such as inaccurate ignition time, leakage of high-voltage lines, and weak ignition caused by carbon deposition in spark plugs, which will reduce combustion efficiency and increase engine fuel consumption. Driving road condition is an important factor affecting fuel consumption. Cars have their own "economic speed" and are generally designed in the area of 70 ~ 90 kilometers. If you can drive unimpeded in the city within this speed range, the fuel consumption should be close to the test value of the standard test site; There are few such unimpeded big cities in our country now. When "cars don't run as fast as bicycles", the increase in fuel consumption is great. Several bad driving habits that affect fuel consumption: 1, the driving habit of grabbing empty seats. In daily driving, especially when the traffic is not smooth, waiting for a red light and changing lanes, this phenomenon is more common: as soon as there is a space in the adjacent lane, a car here suddenly accelerates to squeeze past, and after passing, it is necessary to step on the brakes. 2. The habit of low-speed and high-speed long-distance driving mostly happens to novices, and it often happens to people who are easily distracted by driving. The fuel consumption of long-distance high-speed driving in the third gear will increase by 10% compared with normal driving in the fourth gear. If the third gear is changed into the second gear, the fuel consumption will increase. 3, unnecessary high-speed driving Any car has an economical speed, and driving at this speed is the most fuel-efficient. Below this speed or above this speed, the fuel consumption will increase, and after a certain speed, the fuel consumption will increase greatly. The speed limit of expressways in China is 1 10 km, and some sections are allowed to reach 120 km. However, many people driving on the highway will greatly exceed this speed, which is neither safe nor economical.

Question 9: What are the reasons for the high fuel consumption of automobiles? Hello, car owner, Che Fa Fa will answer this question for you online. The reasons for high fuel consumption are complicated. Common situations are: 1, poor oil circuit: too much carbon deposits lead to oil circuit blockage, resulting in high fuel consumption. 2. Abnormal braking: The brake pads do not return, resulting in the vehicle being in a braking state all the time. 3. Spark plug failure: General vehicles need to replace the spark plug when driving for 20,000-30,000 kilometers. If you feel that the fuel consumption of the vehicle is too high, you can check whether the spark plug is ignited abnormally. 4. The air filter is too dirty: the air filter needs to be replaced in time for vehicle maintenance, otherwise it may lead to poor air intake and increase fuel consumption. Solution: Check the oil circuit, electric circuit and braking system, confirm whether there is any fault, replace the air filter in time and maintain the vehicle in time. If you think my answer is helpful to you, please adopt it as the best answer. Thank you.

Question 10: What is the high fuel consumption? The tire pressure is too low and the car is expensive to drive. But can your 1.5L car only drive 350km with full gas? If the 45L mailbox is calculated by 5 liters of oil in 7 yuan, you are almost 1 yuan per kilometer. If you can only drive 250 kilometers, then your fuel consumption per 100 kilometers is 18 liters. Go and check if there is any water leakage. Mercedes doesn't use that much oil.