Last week at the Dmitrov avtopoligone company Volkswagen has presented its new turbo engine of 1.4 liter capacity 140 hp and 170 hp, called TSI. In developing the new power unit was taken as a basis for motor 1,4 l and 1,6 l FSI with chain drive timing. The main feature of the TSI engine is the concept, dubbed Downsizing. It is a combination of direct injection and dual charging, due to which managed to surpass the power of engines with a large volume at a fairly impressive reduction in fuel consumption. In fact, the 1,4 TSI engine is the world's first gasoline engines with direct fuel injection and double depression. Double boost with the use of plug-compressor and turbocharger achieves torque 240 (220) Nm at 1750 (1500) rpm for in-line 4-cylinder engines of 1.6 and 1.4 liters respectively. Based on the provisions of the gas pedal, the boost pressure control system Volkswagen determines whether enough pressure created by the turbocharger, or to connect a mechanical compressor. Due to this, achieved almost perfect elasticity of the engine. Both engines achieve impressive torque over 200 Nm at speeds of 1250 rpm. Engine block 1.4 liter TSI is made of cast iron with lamellar graphite. Such a concept has increased the reliability of the engine under high pressure in the cylinders. Grey cast iron with lamellar graphite solid aluminum. In the cast-iron block, bolts are screwed into the body of the cylinder, while in the aluminum block stud goes through the entire block and ends with head mounting. Now it is time to consider the advantages and disadvantages of compressor and turbocharger, and the effectiveness of their combined work. The compressor is a mechanical supercharger, connected via a magnetic clutch. Its main advantages are the rapid creation of the necessary boost pressure and high torque at low revs. The compressor does not require any external lubrication and cooling, but it takes away power from the engine, as well as boost pressure is created, depending on engine speed and then adjusted, with the lost of energy produced. Turbocharger permanently driven by exhaust gases and through the use of their energy has a very good efficiency. Of the drawbacks of this design should provide a high thermal loading, as well as the lack of boost pressure generated in the lower rpm range with a small engine, resulting in a so-called turboyama. We are now the compressor and turbokompresoora in a series circuit could compensate for their weaknesses, as well as highlight the benefits. In the static mode, the compressor at high engine speeds created by the boost pressure is not enough, and therefore the mechanical compressor is running constantly. In the dynamic mode, the turbocharger mechanical compressor connected for a short time to compensate for turboyam and guarantees a so-called turbopodhvat at any engine speed. Up to 3,500 rpm, the engine compressor is connected as needed. This requires, for example, when the engine is constantly working in this range, followed by a strong acceleration. Due to inertia turbocharger, this would lead to a delay in acceleration (turboyama). So here connects the compressor quickly creates the necessary boost pressure. Depending on load and speed, the engine control unit determines whether the turbocharger alone or be connected compressor. TSI engines are installed on the model Golf, Touran, Jetta and Golf Plus. In addition, from June 2007 to start issuing the new Golf Variant with TSI. Volkswagen Golf TSI engine equipped with a power of 140 hp accelerates the car up to "hundreds" of 8.8 seconds., the maximum speed is 205 mph and fuel consumption at the same time is just over 7 liters. And when driving out of town this Golf consumes just 5.7 liters. 170-hp Golf GT with TSI engine takes the acceleration to 100 km / h in 7.9 seconds. A top speed of 220 km / h and the average rate - 7.3 liters. During the presentation, we were able to try to move Golf GT, as well as model Touran, equipped with a motor TSI with 140 hp More powerful bright red Golf GT, equipped with a 6-speed manual transmission only adjusts its views on the militant mood. Up to 120 km / h engine with 170 hp demonstrates the powerful acceleration. Due to the compressor, car show strong acceleration, but after 2400 rpm and the turbocharger is activated pickup. After 120 km / h militant zeal of a car going down a bit - probably beginning to affect a relatively small volume of 1.4 liters, which is simply no longer enough. Only after we managed to overclock a car on a flat road, you begin to understand the advantage of a double boost. Set speed is absolutely smooth, without gaps, which are peculiar to cars with a supercharger. With a calm and measured driving in the case comes only a mechanical compressor, thus achieving good fuel economy, but as soon as the gas pedal is recessed into the floor, Golf GT without the slightest delay rushes forward. Volkswagen Touran with a 140-horsepower engine and automatic transmission DSG has no such agility as a bright red Golf. However, the 1.4-liter TSI engine allows you to feel completely calm at the wheel of the family minivan. Branded DSG transmission paired with the power unit TSI demonstrated clarity of work. Calm, but at the same time, confident acceleration, combined with low fuel consumption make it a good family choice. In the Touran does not want to "light" as the Golf. Measured movement in the city or leave the city for the weekend, accompanied by the entire family is the main function of a minivan. The new engine from Volkswagen has demonstrated a good balance, and confirmed that it can be installed on a small hatchback and the family minivan. Golf TSI and represent a combination of turbo engine and dynamic sports car, while the Touran and TSI - a calm, balanced tandem which, in addition, substantial fuel savings. Time will tell on how reliable the engine, which is applied and the turbine and compressor at the same time, it's one of the most expensive repair kits, which is why the secondary market TSI engines can gain notoriety.
No comments:
Post a Comment