What is VVT-I? Technology VVT-I 1.8 VVT what engine

Vvti Toyota What is it and how is it arranged? VVT-I - so called the constructors of the autocontrace Toyota System The gas distribution phase controls that have come up with their system of increasing the efficiency of internal combustion engines.

This does not mean that such mechanisms are only at Toyota, but consider this principle on its example.

Let's start with the decryption.

For the first time on the market, this technology is represented by Toyota Ten years ago, in 1996. There are similar systems in all autocontracens and brands, which speaks of their benefits. They are called, however, everything is different, in full swing of ordinary motorists.

What brought VVT-I to the Motor Building? First of all, the increase in power is uniform in the entire range of revolutions. Motors have become more economical, and therefore more efficiently.

The gas distribution phase control or the moment of raising and lowering the valves occurs by turning to the desired angle.

How it is implemented technically, consider further.

Vvti Toyota What is this or how does the VVT-I gas distribution work?

The VVT-I Toyota system is what it is for what, we understood. Time to deepen in its inside.

The main elements of this engineering masterpiece:

• coupling VVT-I;
• solenoid valve (OCV - OIL CONTROL VALVE);
• control block.

The algorithm of all this design is simple. The coupling, which is a pulley with cavities inside and the rotor, fixed on the camshaft, is filled with oil under pressure.

The cavities are somewhat, and for this filling answers the VVT-I valve (OCV) acting by commands of the control unit.

Under the pressure of oil, the rotor together with the shaft can be rotated at a certain angle, and the shaft is already, in turn, determines when climbing and dropping valves.

In the start position, the position of the camshaft of the intake valves provides maximum cravings on low motor revolutions.

With an increase in the speed of rotation, the system turns the camshaft in such a way that the valves open earlier and closed later - it helps to increase the return on high revs.

As we see, the technology of VVT-I, the principle of which considered, is quite simple, but, nevertheless, effective.

Development of VVT-I technology: What else did the Japanese come up with?

There are other varieties of this technology. So, for example, Dual VVT-I manages work not only camshaft inlet valves, but also graduation.

This made it possible to achieve even higher engine parameters. Further development of the idea was called VVT-IE.

Here, the Toyota engineers have completely abandoned the hydraulic method of controlling the camshaft position, which had a number of disadvantages, because for turning the shaft it was necessary that the oil pressure rose to a certain level.

To eliminate this lack, it was possible to eliminate the electric motors - now they turn shafts. That's how.

Thank you for your attention, now you yourself can answer anyone to the question "VVT-I Toyota what it is and how it works."

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Long chose a car for my wife. I drove on Toyota for a long time. Corolla approached almost perfect. But honestly, it is nice to call it, the language did not turn. She resembled the face of unfortunate beauties after a plastic surgery, when the bandages just removed. When I saw the pictures of the updated - the desire was significantly increased. I put 5+ designers. It became at least clear what I meant that surgeon. Well, yes, not the essence. Taste and color, as you know ..

Honest 11.9% of the loan from Toyota Bank have tried to defeat doubts.

Now to the question of marketers.

The logic of these people apparently never can be understood. I can forgive the "paddle" in the rear doors, cheap full-time magnetol, etc. But the lack of a stabilization system in any grades to put it mildly angry. Of course, I understand that you need to disseminate cars in different segments, so that there is no internal competition from the manufacturer, etc. But Bossh sells it for $ 200 !!! And by the way she saves life. There is nothing worse than the frontal accident on the highway. And they often occur precisely because of the loss of clutch with the road. I personally do not blinking the eye to surcharge for it 10-15 tons. I am sure that I'm not alone.

And more about sad.

I mean boxes. They were never strong side Toyota. Not in terms of reliability. Here just full order. And in terms of advancement. Toyota in this matter is hopelessly conservative. It is generally recognized that the "robot" was originally equipped with this car failed. Of course, I am very glad that he was replaced by a classic machine.

But why a four-stage ?? All have long been five, or even six gears! Yes, hell with her with Corolo. How did your hand rose to equip a 4-mortar RAV4?

Well, finally the last spoon of tar.

Heated seats. Why only two positions on / off ?? Of course, I do not pretend to smooth adjustment as at Lexus. But Hi / Lo is that the doctor prescribed. Hi - heated, Lo - Ride all day. And then ON and in a couple of minutes - your omelet is ready, Seda! And to turn on / off all the way, these tiny buttons are inconvenient, and unsafe, since both of them are located on the right of the Koch gearbox and find them uncooked rarely. And on the left of this place the plug. But why ???

Here is probably all of the unpleasant.

Put the hand on the heart, I say - the car is excellent! What is not surprising. This is the "meat" of Toyota sales. Engineers are not entitled to an error in this model.

1.6 DUAL VVTI engine - above all praise! Applauding motorists standing. Beautifully pulls both from below. It must be, to a large extent, smoothes long boxes. By the way, despite 4 steps, the box, oddly enough, still deserves at least 4+ marks. The lack of fifth transfer on the track and not a very big desire to jump down under overtakers, most likely only my fictional soldiers. Everything is quite expected to the automaton of the 20th century. But in the city, the box behaves unequivocally on firm 5! There are inadvertent unnecessary kikdaunov, when it's too late to squeeze the engine, the window in the neighboring row has already occupied.

Finish with the alliance engine the box would like on positive fuel consumption figures. On the highway comp. Showed 6.4, and judging by gas stations, it is not far from the truth. I will not write about the city consumption of fuel. All it will be different. Relying on your own experience, I can safely declare that it depends on two important factors: from the temperature of the driver and from its honesty. Besides the city city, the city is mounted. Someone has interpretations with traffic lights after 3 km. And someone in life stands in traffic jams

Now about the suspension.

In my opinion, almost the perfect balance of comfort and manageability. Traveled to Camry - too soft. Very roller in turns. But it is understandable. She was done under the fat rear of the darkens of hamburgers with Koloy. In fact, Russia is the only country, except the states where Camry is sold. Apparently no one tried to remake her under us.

Traveled to the test drive of the new Avensis. Very hard. Especially from behind. It's a pity. The previous "broom" was very pleasant.

So the Corolla is golden mean. In the measure of energy-intensive. Great ruling. Of course not BMW. But for its segment, manageability is very pleasant

In terms of ergonomics - everything is for me. Maybe because I have long been driving on Toyota. Or maybe just "Eurobill - 1 piece". In the cabin, nothing creaks, does not rattle. The plastic of course could be softer, but looking at the price tag you understand - ok. Seats are very comfortable. Pleasant side support. Behind, of course, three adults are closed. But gentlemen! Have a conscience. This is "C" class! The trunk deserves estimates 4. It is quite spacious, but the loop of the cover of course spoil the impression.

A little frustrating a budget option Restyling rear Lights. Of course, I understand that to redo the iron lid of the trunk is expensive. But this inserts from white "dashboats down on dark cars - like Belmo in the eye. That is why she is tritely silver. By the way restyling the American Corolla, all the same touched this very lid of the trunk. Lanterns there already. Again, the question for marketers - do you really cheaper to stamp different metal parts, for different markets ???

Managers claim that ground clearance One of the largest in class. We believe them for word. Of course, in comparison with my kruzak, believe it with difficulty. Therefore, the next car for the wife - without parckarter options. I am convinced that overlapping two wheels about the road - it is wrong :)

Good luck on the roads!

10.07.2006

Consider here the principle of functioning of the system of the VVT-I second generation, which is now applied on most Toyotov engines.

VVT-I system (VARIABLE VALVE TIMING INTELLIGENT - changing phases of gas distribution) allows you to smoothly change the gas distribution phases in accordance with the operating conditions of the engine. This is achieved by turning distribution Vala inlet valves relative to the graft shaft in the range of 40-60 ° (over the corner of the crankshaft rotation). As a result, the moment of the opening of the inlet valves and the time of the "overlapping" (that is, the time when the exhaust valve is not yet closed, and the intake is already open).

1. Design

The VVT-I actuator is placed in the camshaft pulley - the drive body is connected to an asterisk or gear pulley, a rotor - with a camshaft.
The oil is supplied from one or another side of each of the rod petals, forcing it and the shaft itself is turned. If the engine is muled, then the maximum delay angle is set (that is, an angle corresponding to the latest opening and closing of the inlet valves). To immediately after launch, when the pressure in the oil line is still not enough to effectively control the VVT-I, there were no shocks in the mechanism, the rotor is connected to the housing of the locking pin (then the pin is pressed by the oil pressure).

2. Functioning

For the turning of the camshaft, the oil under pressure using an spool is sent to one of the sides of the rotor petals, simultaneously opens to the plums of the cavity on the other side of the petal. After the control unit determines that the camshaft occupied the desired position, both channels to the pulley overlap and it is held in a fixed position.

The above 4-petal rotor allows you to change the phases within 40 ° (as, for example, on the engines of the ZZ and AZ series), but if you want to increase the angle of rotation (up to 60 ° in SZ) - 3-petal or workers cavities are applied.

The principle of operation and modes of operation of these mechanisms are absolutely similar, except due to the extended adjustment range it becomes possible to exclude overlapping valves at idle, at a low temperature or start.

Well, I was driving my first Tytoi! As at one time, it was driving his first and second deceze, old in 1998 mazda 323 (low-profile), new Accent, fresh Vase 1114 ... Well, of course, I immediately felt the difference between the quality of the very old Japanese, the new Korean and our edema. Car and relatively young Japanese. Automatic box Also not exploited to the village.

The car went from my parents. I did not want to first take the car, which is driving a lot of girls in our city. Yes, and I did not like the color - silver ... and even Hatch. I always liked the sedans. In general, leaving with him claims to the car, discharged a very pleasant price for him, I bought.

And after a few days later I watched my Japanese on my Japanese: "How could I think about you, dear?" Silver color was very practical. Especially after the black Höndai of the Achtzent, when, after a trip from the car wash to the parking lot, the car was immediately covered with a visible layer of dust. In which alleys, I did not unfold on it when the girls took the girls. On the sedans it would be difficult!

The automatic transmission is just a fairy tale. Previously afraid of fire (stereotypes). The engine is smart, the speaker is excellent. And if you press the cherished button (it seems to be responsible for the fuel economy mode), then in general "fries" the machine Ida gone! Well, eats in this mode decently. Up to 17 liters. If you go quietly - you can put in 8ku. The suspension was just a little upset. Hard. But justified by excellent handling. Turns almost without roll. (Again I remember accent. When turning a strong roll and remnant of the ass is provided. But softer on the go - it's yes ...)

But I was sold to the machine with a problem. Could not for a long time to figure out why the strongest frost - the more difficult to get to her. Official dealers Mutozil me and my Japanese 4 times. Leaving at night, changing the blocks of alarm, relyushi ... it is useless. Until all ignition was changed under warranty. Just the previous owner often overtook the ignition key when the car has already started.

Traveling about 15,000 traveled on Tilah. It was late for 5000. Diagnosed: Replacing the healing, front brake discs, backs of lining and timing belt. For everything about all 18000r. The whole original. To be honest, do not even feel sorry to spend on such a car. Not to say, of course, that I am every morning as Romeo to Juliet run to Korolen, but the pleasure of driving and the faint of reliability does not take away, definitely. At the accent, the clutch bearings forever changed brake pads with enviable constancy.

By the way, in the new Corolla, I liked a softer suspension and noise insulation. But the interior decoration disappointed. It is interesting to ride on Auris.

Engine Toyota Corolla 1.6 Litra is one of the most popular and successful engines on Toyota Corolla. Motor model on the internal classification of the manufacturer - 1ZR-FE. This is a gasoline atmospheric, a 4-cylinder, 16 valve engine with a chain drive of the TRP and the aluminum block of cylinders. Toyota designers tried to do so that the consumer would not look under the hood at all. Motion and reliability power aggregate Very decent. This is the main thing on time to change the oil and pour high-quality fuel.

Engine device Toyota Corolla 1.6

The Toyota Corolla 1.6 engine has absorbed all the best developments of the previous generations of the Japanese manufacturer's motors. Motor has advanced systems for changing the phases of the DUAL VVT-I gas distribution phase, the valvematic valve lifting height system, in addition, the intake path has a special design that allows you to change the speed of the air flow. All these technologies made a motor as an efficient power unit.

Toyota Corolla Engine Cylinder Cylinder Head 1.6

The head of the cylinder block is a pastel for two camshafts with the "wells" in the center for the spark plugs. Valves are located V-figuratively. A feature of this engine is the presence of hydrocompensators. That is, once again adjust the valve clearance does not have to. The only problem is associated with the use of low-quality oil, in this case the channels can be clogged and the hydrocompensators will stop performing their function. In this case, from under valve cover A characteristic unpleasant sound will proceed.

Driver motor engine Toyota Corolla 1.6

The chain drive of the engine Designers and engineers Toyota decided to make the most simple as possible, without all sorts of intermediate shafts, additional tensioners, soothers. In the drive drive, only the tensioner shoe, the tensioner itself and the calm itself participate in the drive of the crankshaft and camshafts. Timing scheme is slightly lower.

For the correct combination of all TRG marks, there are links painted in yellow-orange color. Enough when installing, combine the labels on stars of camshafts and crankshafts with painted chain plates.

Technical characteristics of the engine Toyota Corolla 1.6

• Working volume - 1598 cm3
• Number of cylinders - 4
• Number of valves - 16
• Cylinder diameter - 80.5 mm
• Piston stroke - 78.5 mm
• GRM - chain
• Power L.S. (kW) - 122 (90) at 6000 vol. in min.
• Torque - 157 nm at 5,200 rf. in min.
• Maximum speed - 195 km / h
• Acceleration until the first hundred - 10.5 seconds
• Fuel type - gasoline AI-95
• Fuel consumption in the city - 8.7 liters
• Fuel consumption in a mixed cycle - 6.6 liters
• Fuel consumption on the highway - 5.4 liters

Besides timely replacement High-quality oil carefully follow the fact that you fill the car. If you do not pour into the engine that got, the engine will delight you for many years. In practice, the motor is up to 400 thousand kilometers. True repair sizes for piston group not provided. Perhaps one more weaknessThese are sharp temperature drops. If you overheat the motor, it is possible to deformation of the GBC or even the block, and these are essential financial losses. The 1ZR-FE engine was installed almost to all Corols 1.6 liters (and other models of Toyota) issued from 2006-2007.