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Automotive

Find the advantages of individual control valves

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The authors of the system say that it can help to upgrade already manufactured engines. Yes, you will have to change the head unit, but it is much easier than to design the entire engine from scratch.

About the benefits of change of phases of gas distribution of internal combustion engines intake and (or) issue we talked eleven years ago. Now these motors is very common. Sometimes they are complemented by the device, changing the height of the valve lift. And yet full freedom of regulation there. After all, “smart” actuators do not act on the valves, and move a few degrees camshafts, rotation of which is associated with the rotation of the crankshaft. Or such system transferred to the valve operation from one Cam to another with a different profile. To save the phase adjustment from any restrictions allows other technology: Intelligent Valve Actuation (IVA) from the British company Camcon Auto.

It looks like the IVA mechanism for one cylinder. On each valve (in this example four of them) — your mini camshaft pivoted to any desired angle by an electric motor, plus your mechanism when the Cam–valve.

In this intelligent actuator camshaft, each valve is not constantly spinning, and is rotated only at the time when the valve should open or close. And the rotation is first in one direction and then in another. Cam with valve connects desmodromic mechanism. That is, the reverse is not due to the spring, and, again, strictly controlled by the camshaft. The valve can be opened much faster than in the conventional engine, then leave almost motionless, then close. You can get it to open twice in one stroke. Or one software to change the firing order in the cylinders. Could I ask you a personal profile raising and lowering each cylinder at any time to change it.

The system works with motors whose working range is up to 6500 rpm Full valve lift occurs for five milliseconds.

Conventional engine technology, the IVA may, at the desire of programmers to realize any thermodynamic cycle — Otto even though Miller/Atkinson, even with compression-ignition HCCI, though it Mostovskoy version of SCCI. Such a motor is possible by simply replacing the program to translate from the four-stroke cycle two-stroke or even ultra-low-cost 12-stroke. The latter is a variation of the old ideas off some of its cylinders under low load. But in a conventional engine electronics deactivates, for example, half of the cylinders for a certain long time. And in the case of an IVA all the cylinders evenly. But only one of them gets the fuel and activates the ignition times in four beats, and each third their stroke (once per 12 cycles). So all the cylinders remain in the normal operating temperature.

In the case of in-line motor (for example, converted in the form of experience of the Quartet JLR Ingenium) each miniature camshaft IVA, oriented transversely to the common axis of the internal combustion engine (i.e. the axis of the crankshaft).

Of course, the Camcon is not the first firm, to reflect on the full system and a completely free control over valve timing. Such projects existed at GM and Ford, Ricardo and Lotus Engineering. Recent example of the need to remember system Qamfree no single camshaft. The development started in Koenigsegg, and continued in the firm FreeValve along with the Koros. In Camcon Auto, as you can see, I went the opposite way — put the personal on the camshaft for each valve.

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To demonstrate the actual work IVA the authors of the device have altered motor Jaguar and released such a car on road tests.

As the developers say, potentially IVA can reduce carbon dioxide emissions by 15-20%. To test a sample of engines (“turboservice” 2.0) were able to demonstrate fuel savings of 7.5%. In a series of IVA would be cheaper than the hybrid powerplant, think the British. And the cars with the petrol unit would be roughly comparable to diesel. Firm Camcon is ready to supply manufacturers sets their actuators and kits for the adaptation to engines or to cooperate with suppliers of components. Brits predict that production cars will appear in the IVA for five years.

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Automotive

SUV Mitsubishi Pajero Sport will soon change the appearance of

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mitsubishi pajero sport

Mitsubishi pajero sport. Решётка радиатора и бампер ощутимо преобразятся. А ещё, судя по прототипу, фронтальная оптика станет двухэтажной с крупными секциями по углам бампера, как на паркетнике Eclipse Cross.

Leonid Popov, 6 hours ago. Photo: Stefan Baldauf/SB-Medien

Grille and bumper significantly transformed. And yet, judging by the prototype, the front optics will be two-story with large sections in the corners of the bumper as the SUV Eclipse Cross.

Winter test of the car somewhere in the North of Sweden allowed photospin to take the first pictures of the updated SUV Mitsubishi Pajero Sport. The current generation of models appeared in the summer of 2015 and, of course, micro-updates, implements for a particular model year, a full facelift can not replace. So, this year we should see redrawn Sport.

Camouflaged machine does not allow to consider all details, even on a larger frame. And yet it seemed to us that the new lights not only adjusted the schedule, but he disappeared “flowing” down the section. It was one of the most memorable features of the model, although very controversial.

Modern Pajero Sport sold in Australia, Indonesia, the Philippines (as Montero Sport) and Thailand, several countries in the Far and Middle East and, of course, we have. But in Western Europe (except Britain) and the United States, for example, a model no. But the situation may change after the facelift. In any case, Europe is more likely. Edition Motor1.com even calls potential name for the model in this region — Shogun Sport (designation SUV is now present in Britain). And if the car reaches the US, it could be called half-forgotten there, the name Montero (or Montero Sport).

Probably, the designers intervened in the design of the rear rack, but in the interior of the radical innovations are not expected.

Recall that the current Pajero Sport is equipped with gasoline “aspirated” V6 3.0 MIVEC 6B31 (209 HP, 279 N•m, in some markets 220 HP) and a modern diesel engine 4N15 2.4 MIVEC (181 HP, 430 N•m) with variable turbine geometry. In addition, in Indonesia there is a modification with the old 2.5 diesel 4D56 136 “horses” (314 N•m). In any of these aggregates may be correct. And if you look at market trends can dream about adding in the range of a hybrid version of the Sport tailored to the experience of the creation and evolution benzoelektrosila Outlander.

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Automotive

Ready for any winter: 5 new SUV with highest ground clearance

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In your town had a three-month norm of precipitation, and snow removal equipment not delivered? For the last three days you are stuck 6 times and wiped his bottom all the snow gauge in the yard? Let’s see how much money you need to buy a car with such ground clearance, which is enough to forget about these problems forever. At least in the city.

Te who are waiting to see the list of the best hardcore exclusively body-on-frame SUVs, badly wrong. Those who hope that most will be luxury crossovers with air suspension, is also only partly right – because pnevmologika raises only the body, but does not affect the actual clearance. In General, let’s move from speculation to actual facts.

Infiniti QX80

  • Clearance: 234 mm
  • Price: from 4 790 000 rubles

Sunset in the class the tallest looks a little discouraging: just take a swing at a decent ground clearance and 5 million. But in General Infiniti QX80 update was a little lower – if used under the bottom was more than 250 mm, in its present form the ground clearance is claimed at around 234. And yet, despite this, he bypassed colleagues from Toyota and Lexus: Land Cruiser 200 LX570 and have a ground clearance of 230 and 225 mm, respectively.

Infiniti QX80 5.6 '2017–н.в.j infiniti_qx80_5.6_35

High price, however, is not the only feature of QX80. He is ready to surprise and age technical base, which is built – because the update looks in 2017 does not affect the internal filling, even the engine power remained the same. At the core of the design is the frame and four-wheel drive, despite the presence of pangani, implemented via the electromagnetic clutch, causing the front wheels – that is, the scheme here is closer to the crossover. The movement of the machine causes all the same a 5.6-liter V8 with a capacity of 405 HP, docked with a 7-speed automatic. Given the fact that the total mass of the car is almost end-to-end fit within the scope of category B, accounting for 3.4 tons, the maximum speed should be considered for the benefit. But in favor of the clearance, and in favor of comfort is the fact that there are no bridges at the front and rear multi-link suspension here.

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Automotive

600LT Roadster McLaren coupe Spider lost only a little

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Konstantin Bolotov, 1 hour ago. Photo: McLaren

Of course, the couple has the same engine 3.8 V8 Twin Turbo (600 HP, 620 N•m), mated with seven-step “robot” SSG with two wet clutches. However, the dry weight of the Roadster due to the sliding mechanism of the roof is 50 kg more than the coupe (1297 kilo), hence “losing”.

In acceleration to 200 km/h version behind Spider coupe McLaren 600LT only 0.2 C (8,4), however, a set of hundreds supercar with an open top similarly quick and 2.9 s, the speed of the Spider just below (323 vs 328 km/h), and the initial price is higher — $500 vs 256. $240 000. However, the circulation of “long tails” of the younger family Sport Series is limited, and if buyers do not snatch them for a few weeks, blame it on the only possible Brexit.

“I am pleased to report that when retracted the roof exhaust system sounds and looks even better!” — urged on by Executive Director Mike Flewitt. At the client’s request, McLaren will be removed from the interior excess weight in the form of audio system and climate control.

Three-piece hard top, made of composite materials, at the push of a button extends the actuator 15 at speeds up to 40 km/h. a wind screen over the heads of the riders is activated independently of the roof. The developers are proud that they, unlike the makers of the cabriolet, not had to further strengthen the structure for greater rigidity. Besides, the downforce was not injured, aerodynamic losses no.

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