Turbo engine
Turbocharger technology is a method of increasing the engine's intake capacity by using a dedicated compressor to pre-compress the gas entering the cylinder to increase the gas density into the cylinder, increase the intake air volume, and better meet the fuel Burning needs, so as to achieve the purpose of improving engine power.
Advantages: without increasing the engine displacement, based on the substantial increase in power and torque.
Disadvantages: Turbine work hysteresis, and high maintenance costs.
Representative models: Bora 1.8t Sagitar 1.8t Touran 1.8t Passat 1.8t Audi a41.8t / 2.0t Audi a62.0t
Supercharger
The supercharged compressor is directly driven by the crankshaft of the engine and has the advantage of good responsiveness, but it itself consumes a fraction of its energy, so that supercharging does not produce particularly powerful power, especially at high speeds, Increased engine speed.
Advantages: responsiveness There is no turbo hysteresis at all times, can output a steady stream of torque at any time.
Disadvantages: high speed will produce a lot of friction, thus affecting the speed increase, and noise.
Representative models: Beijing Benz e200 Range Rover Sport Edition
Direct injection gasoline technology
Turbocharger technology is a method of increasing the engine's intake capacity by using a dedicated compressor to pre-compress the gas entering the cylinder to increase the gas density into the cylinder, increase the intake air volume, and better meet the fuel Burning needs, so as to achieve the purpose of improving engine power.
Advantages: without increasing the engine displacement, based on the substantial increase in power and torque.
Disadvantages: Turbine work hysteresis, and high maintenance costs.
Representative models: Bora 1.8t Sagitar 1.8t Touran 1.8t Passat 1.8t Audi a41.8t / 2.0t Audi a62.0t
Supercharger
The supercharged compressor is directly driven by the crankshaft of the engine and has the advantage of good responsiveness, but it itself consumes a fraction of the energy so that supercharging does not produce particularly powerful power, especially at high speeds, Increased engine speed.
Advantages: responsiveness There is no turbo hysteresis at all times, can output a steady stream of torque at any time.
Disadvantages: high speed will produce a lot of friction, thus affecting the speed increase, and noise.
Representative models: Beijing Benz e200 Range Rover Sport Edition
Direct injection gasoline technology (fsi)
fsi is the abbreviation of fuelstratifiedinjection, which means that fuel stratified injection. Fuel stratified injection technology is a kind of engine lean burn technology. What is lean burn? As the name suggests is the engine mixture of low gasoline content, the ratio of gasoline to air Up to 1: 25. It is characterized by a variable vortex has been generated in the intake passage, the inlet flow to form the best form of eddy into the combustion chamber, the way to promote the layered filling, the mixed gas concentration in the center of the combustion chamber Around the spark plug.
Advantages: Increase engine power while significantly increasing fuel efficiency.
Disadvantages: the requirements of the oil is very harsh.
Representative models: Audi a42.0t Audi a62.0t
All aluminum engine
The biggest difference between the two materials is the weight of the engine, the whole aluminum alloy engine can be lighter than the cast iron engine half the weight of the original car is not high, but the proportion of the engine can not be ignored, the most direct result of weight loss is fuel consumption Reduce the weight of the engine also directly affects the driving performance of the vehicle, as most cars are mostly front-wheel drive, such as heavy weight in the previous cabin, the vehicle will cause excessive turning when cornering, and the braking distance will be longer.
Advantages: Reduce the weight of the cast iron engine in half, can effectively reduce fuel consumption and improve handling performance.
Disadvantages: Aluminum materials are expensive.
Representative models: Tiida Swift Audi a8
Variable Valve Timing Technology (vvt-ivect)
Engine variable valve timing technology (vvt, variablevalvetiming) is gradually being applied to modern cars in recent years, a new technology, the engine using variable valve timing technology can improve the intake charge, the charge coefficient Increase, the engine torque and power can be further improved.
Advantages: Increase engine power while significantly increasing fuel efficiency.
Disadvantages: the requirements of the oil is very harsh.
Representative models: Honda Accord Honda CR-V Toyota Corolla Mazda 6 new Outlander BMW 325
Continuous variable valve timing system (cvvt)
When the engine is switched from low speed to high speed, the computer automatically presses the oil toward the small turbine in the intake camshaft driving gear, and under the action of pressure, the small turbine rotates a certain angle relative to the gear casing so that Camshaft 60 degrees in the forward or backward rotation, thus changing the intake valve opening time, to achieve the purpose of continuous adjustment of valve timing.
Advantages: according to the actual working conditions of the engine at any time to control the valve opening and closing, so that fuel combustion more fully, so as to enhance the power and reduce fuel consumption purposes.
Disadvantages: only control the valve timing, there is no control valve lift function, so the engine will only change the suction and exhaust time difference, can not change the intake air volume.
Representative models: Elantra Cerato vision
