turbo technology has become the mainstream of current engine technology.Toyota is arguably as one of the world's largest automotive group, research and development of turbo technology should be no problem, but Toyota is does not have its own turbo engine, has for years been on naturally aspirated engine and turbo technology of popular brands such as counterweight.
today, in the face of increasingly fierce competition environment, Toyota is also determined in the turbo technology fluctuation kongfu.Recently, the Toyota in the Chinese media communication meeting, introduced to the public for the first time it will take on a feng corolla, GuangFeng models of 1.2 L turbocharged engine.
Toyota not turbocharged "latecomers"
in fact, Toyota has been naturally aspirated and turbocharged two fist techniques, but Toyota turbocharged not being known for long, especially Chinese consumers.
as a result, 2014 lexus 2.0 T when the turbo engine industry will only use the word "resurrection", in fact, Toyota developing turbo technology has 20 years of history, is the way Toyota found that hybrid technology can be close to zero emissions that goal, faster to transfer energy to the field of HEV, but this does not mean that the turbo technology, Toyota are latecomers.
to verify Toyota turbo technology is strong, have to take a look at this first keyword - thermal efficiency.The thermal efficiency is what?As we all know, gasoline and the air in the cylinder of motivation to do work.This work, the output power is 100%, but the final effect is not so much on the wheels, from combustion to the wheels, the discretion of the thermal efficiency and power, energy consumption of the vehicle are the most direct link.In simple terms, pressurization technology mainly is to realize the dynamic performance of ascension, but if the thermal efficiency is not high, the dynamic properties of again big also can't efficient conversion, no use.
currently accepted maximum thermal efficiency of the engine is the new prius carrying atkinson cycle naturally aspirated engine, thermal efficiency is as high as 40%, followed by Honda L15B7 1.5 T engine, thermal efficiency is 38%;Toyota 8 ar - FTS 2.0 T engine (200 T, the new crown lexus NX 2.0 T is this engine) thermal efficiency is 36.2%;And in years on Toyota 8 nr - 1.2 T FTS, thermal efficiency is 36.2%.
1.2 T maintenance cost is not high
at the Toyota 1.2 T but USES a lot of high-tech: the engine VVT - iW variable valve timing technology instead of solenoid switch (in motor oil), the structure of the single vortex tube low inertia of the turbocharger () with electronic control exhaust valve, water cooled cold, to optimize the design of the inlet and the piston top increase roll inlet flow, cylinder jacket detonation reduced new every piece in chance.
in fact, the past traditional turbo engine has a lot of problems, such as turbo lag, low turn weakness, poor durability, oil consumption big (commonly known as burning oil), higher maintenance cost.Toyota in research and development of this kind of 1.2 T engine does not avoid these problems, but to address one by one.
to burn oil mainly because turbo engine "channeling gas", Toyota will adopt a jet pump "channeling gas" forced back into the air intake, reduce the combustible mixture mixed with oil, prevent oil deterioration;And durability of ascension, the key is to promote cylinder, crank case, such as the basic structure of rigid, this is the development aims at the design stage is set;After improved durability, thus, the maintenance cost down.