Reasons:
1. Driving style
The above factors are all objective reasons in automobile design and production. In fact, the key factor in automobile fuel consumption lies in people, and people’s driving habits And style determines the fuel consumption of the car to a large extent.
2. Vehicle's self-weight
Perhaps the most intuitive thing that affects vehicle fuel consumption is the vehicle's self-weight. A vehicle with a heavy self-weight will cost more fuel, while a vehicle with a small self-weight will save fuel.
3. Tire model
Generally speaking, the larger the tire model, the more fuel it consumes, while the smaller model tires are relatively fuel-efficient, so when changing tires, comprehensive considerations must be taken.
4. Wind resistance coefficient
The difference in wind resistance coefficient has a great impact on the fuel consumption of the vehicle while driving. For example, when a car is driving at high speed, the difference in fuel consumption between opening the windows and not opening the windows is very large, even greater than turning on the air conditioner with the windows closed. It's very simple. Opening the windows artificially increases the vehicle's drag coefficient.
5. Engine
Advanced or mature engines can achieve low fuel consumption. Therefore, we should not blindly favor new engines over aging engines.
6. Gearbox
Sometimes, even a good engine is not enough. Smooth and mature gearbox technology is necessary to enable the engine's power to be continuously output and evenly distributed. power thereby saving fuel.
What are the basic knowledge about cars?
The fuel consumption of the old Passat 2.0 is 10-12 liters per 100 kilometers. The so-called 100 kilometers fuel consumption refers to the amount of fuel consumed by a vehicle driving 100 kilometers at a certain speed on the road. It is also a theoretical indicator of the vehicle. In an objective environment, the generator set up on the vehicle chassis is measured, and the 100-kilometer fuel consumption data of the theoretical experiment of the vehicle model is calculated by converting the value into the main parameter of speed and driving at the specified speed. The main factors that affect a car's fuel consumption are as follows: The first is to reduce the weight of the vehicle itself. The relationship between vehicle weight and fuel consumption is proportional. Therefore, when the vehicle weight decreases by 10%, the fuel consumption may also be reduced by several percentage points. The second is the car model. The smaller the drag coefficient of the car body, the lower the fuel consumption. There is also a proportional relationship between the two. The last step is to improve the thermal efficiency of the engine. Now the thermal efficiency of most gasoline engines has reached more than 30%, while the thermal efficiency of diesel engines exceeds 40%. This is one of the reasons why diesel engines have lower fuel consumption than gasoline engines.
1. Common knowledge of vehicle structure
A car is mainly composed of an engine, chassis, body and electrical equipment. The power generated by the engine is transmitted to the drive wheels through the clutch, transmission, universal transmission shaft and differential, driving the car.
According to the position of the engine and drive wheels, it is divided into front-engine rear-wheel drive FR, FF, RR, and front-engine four-wheel drive 4WD.
According to engine fuel, there are gasoline engines, diesel engines, and gas fuel engines.
New energy vehiclesThere are pure electric vehicles, hybrid vehicles, and fuel cell vehicles.
The engine working cycle includes four processes: intake, compression, power generation and exhaust. In a four-stroke engine, the crankshaft rotates twice and the piston reciprocates four strokes to complete one working cycle.
Automobile chassis - wheels, transmission, drive shaft, steering system, brake system
Automobile electrical equipment - battery, generator, lighting and signaling device, wiper starter and washer, starting system
2, vehicle performance
During the braking process, there are three situations in which the car loses steering stability: braking deviation, braking side slip in a curve. Braking loses steering ability.
3. Main vehicle safety devices
Safety head restraints, seat belts, airbags, anti-lock braking systems (ABS), child safety seats, child safety locks, instruments Devices (speed and odometer, engine tachometer, water temperature gauge (coolant), fuel gauge, indicator lights and warning lights), lighting and signaling devices
4, driving operating mechanism
Steering wheel, clutch pedal, accelerator pedal, brake pedal, transmission lever, parking brake lever, various switches
5, vehicle operating materials
Gasoline, engine lubrication Oil, coolant, windshield washer fluid
6. Vehicle inspection and maintenance
Check wipers and washers, batteries, coolant, lubricants, fans before driving the vehicle Drive belts, lights, tires, brake fluid.
Replace tires if guaranteed