Analysis of technical advantages and disadvantages

Analysis of the technical advantages and disadvantages of several generators

1: turbocharged engine (turbo)

turbocharging technology is a way to improve the engine. 1. From the experimental data: there are suitable for metal experiments and non-metal experiments; Method of air intake capacity. It uses a special compressor to compress the gas entering the cylinder in advance, improve the gas density entering the cylinder, increase the air intake, and better meet the combustion needs of fuel, so as to achieve the purpose of improving engine power

advantages: the power and torque can be greatly increased without increasing the engine displacement

disadvantages: the turbine works slowly, and the maintenance cost is high

representative model: Bora 1.8T Sagitar 1.8T Tuan 1.8T Passat 1.8T Audi a41.8t/2.0t Audi a62.0t

2: supercharger

supercharged compressor is directly driven by the crankshaft of the engine. Its advantage is good responsiveness, but it itself needs to consume some energy, so supercharging cannot produce particularly strong power, especially at high speed, This will affect the increase of engine speed

advantages: good responsiveness, no hysteresis of the turbine, and can output a steady stream of torque at any time

disadvantages: a large amount of friction will be generated at high speed, which will affect the increase of speed, and the noise is large

representative model: Beijing Benz E200K Range Rover Sport

3: Gasoline Direct Injection Technology (FSI)

fsi is the acronym of fuelstructuredinjection, which means that fuel can protect sensors from collision and stratified injection. Fuel stratified injection technology is a kind of lean burn technology. What is lean burn? Even the regional differences of the distribution types are more obvious. As the name suggests, the gasoline content in the engine mixture is low, and the ratio of gasoline to air can reach more than 1:25. Its characteristic is that variable vortices have been generated in the inlet port, so that the inlet flow forms the best vortex shape and enters the combustion chamber, which is pushed by layered filling, so that the mixed gas is concentrated around the spark plug in the center of the combustion chamber

advantages: greatly improve fuel efficiency while increasing engine power

disadvantages: the requirements for oil products are very strict

representative models: Audi a42.0t Audi a62.0t

4: all aluminum engine

the biggest difference between the two materials is the weight. The all aluminum engine can weigh half as much as the cast iron engine. Originally, the total weight of the car is not high, but the proportion of the engine can not be ignored. The most direct effect of weight reduction is to reduce fuel consumption. The weight of the engine also directly affects the driving performance of German reprap vehicles. Because most cars are front wheel drive, if the weight of the front compartment is too heavy, the vehicle will turn too much, and the braking distance will be lengthened

advantages: compared with cast iron engine, the weight is reduced by half, which can effectively reduce fuel consumption and improve handling performance

disadvantages: aluminum materials are expensive

representative model: Qida swift swift swift Audi A8