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Mitsubishi reveals Twin Clutch SST gearbox

Lancer Proto X

Mitsubishi Motors has unveiled two of the technologies that will go into the upcoming 10th in it’s generation Mitsubishi Lancer Evolution, but let’s talk about them one at a time. We’ll have a look at Twin Clutch SST (Sport Shift Transmission) first – an automated manual transmission with twin clutches much like Volkswagen’s DSG, the current benchmark for dual clutch automated manual transmission.

Much like DSG, Mitsubishi has upt the odd gears (1st, 3rd and 5th) on one clutch and the even gears (2nd, 4th, and 6th) on the other clutch. Under precise system control, the gearbox swaps between gears much faster on the upshifts as the next gear is preselected.

The Twin Clutch SST system has three shift programs – Normal, Sport and S-Sport. Normal mode like it’s namesake is for normal driving around town and highways. It uses low shift points for better comfort and fuel economy.

The Sport mode is to be used in situations like mountain driving, or whenever you need lots of engine braking, keeping the gears in lower ones for longer than normal. Shift points are also higher for more power. S-Sport mode is the mad, rapid, rev to redline mode with the fastest possible shifting.

Mitsubishi did not release the shift times for the Twin Clutch SST so we don’t really know at this moment whether it is faster or slower or equal to Volkswagen’s DSG.

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Toyota develops Active Headrest system

Toyota Active Headrest

Toyota’s newly developed Active Headrest system promises to reduce the possibility of neck injury during low-speed, rear impacts. A sensor built into the seat’s backrest recognizes when the occupant’s lower back presses against the backrest, thus triggering the upper unit to activate the head restraint. The head restraint activates diagonally 30mm upwards and 25mm forwards to quickly catch the back of the head. This can reduce severity of whiplash injury by 10-20%.

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Bosch develops new solenoid valve injector

Piezo InjectorPiezo fuel injectors are all the rage for turbodiesel engines these days for the superior performance they have. Pieze injectors (graphic shown) can inject fuel using multiple jets and multiple injections per cycle, and is the key to reduce in-cylinder emissions, boost performance, and reduce noise. This comes at a cost however – piezo injectors are expensive as the piezo crystal that gives it it’s name is expensive to produce.

Robert Bosch GmbH says it has succeeded in developing a solenoid valve injector that can handle up to 29,000 pounds per square inch of pressure and will launch it later this year. This new solenoid valve injector comes very close to the performance of piezo injectors.

While high end manufacturers like Mercedes Benz would likely still go for piezo instead for benefits of better refinement and reduced engine noise, Bosch targets the mid-range customers for this new solenoid valve injector.

Source

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Fiat reveals new 188hp 1.9 liter JTD M turbodiesel

smallfiatlogo.jpgFiat Powertrain Technologies has unveiled the latest revision of it’s 1.9 litre JTD MultiJet 16 valve inline-4 turbodiesel engine, which uses twin stage turbocharging to produce high power and massive torque in a wide RPM range at the same time.

Low end torque has improved by 50% over current JTD MultiJet models, with 300Nm available from just 1,250rpm going up to peak torque of 400Nm at 2,000rpm. The new engine is available in two stages of tune – 177 horsepower and 188 horsepower at 4,000rpm. The higher 188 horses version is exclusively for Fiat and Fiat Group companies like Alfa Romeo and Lancia, while the 177 horsepower version will be made available for purchase to customers. Nanjing as one of the first customers comes to mind – they were reported to be sourcing a powerful turbodiesel for it’s MG 7 sedan from an European manufacturer.

The new engine uses a 16.5 compression ratio, low-voltage metallic glow plugs, an improved EGR cooler, and a new inlet port design. It complies with projected Euro 5 emission standards. It has a cast iron block and an aluminium alloy head.

The 177hp version will be available in July 2007 onwards, while the 188hp version is set to be launched in June 2008. The engines will be produced at Pratola Serra in Italy.

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Toyota reveals Valvematic technology

Toyota Valvematic

Toyota has something new up it’s sleeves – Valvematic, an evolution of the VVT-i mechanism which now incorporates continuous valve lift control together with VVT-i’s existing valve timing control. Valvematic also eliminates the need for a throttle valve, instead controlling the volume of intake air using valve lift instead.

According to Toyota, an improvement of 5% to 10% can be seen with fuel efficiency, as well as an improvement of 10% with the power output on a similiar engine displacement comparison. Toyota also mentions reduced CO2 emission as well as improved acceleration responsiveness.

The first Valvematic-equipped engine will be a 2.0 litre model, most likely a replacement for the 145 horsepower 1AZ-FE engine which has been pretty much slotted with different tune levels into all Toyota cars in the C-segment and above. The trademark “Valvematic” was registered by Toyota a few months ago, so alot of people have been expecting this. One of the first few cars to get the new Valvematic 2.0 litre engine are the 2.0 litre versions of the recently launched twin sedans Toyota Allion and Toyota Premio. The 2.0 litre variants are set to debut in Winter 2007.

The new Toyota Valvematic 2.0 litre engine will most likely be christened the 3ZR-FAE, and will put out 158 PS at 6,200rpm and 196Nm at 4,400rpm. Being part of the new ZR engine family, variable valve timing features will be the same as the 2ZR-FE’s Dual VVT-i system – valve timing on both intake and exhaust valves.

Honda also recently announced an engine with continuous valve lift control combined with variable valve timing, a technology it calls AVTEC.

Check out a patent application filed by Toyota in March 2007 by clicking here – I think it is the patent for Valvematic. Be warned though, it’s pretty long.

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Volkswagen’s TSI Engine

golf_tsi_enginebay.jpg

Volkswagen produced this infomercial for the Volkswagen TSI Series of engines. Volkswagen aimed to produce a motor that both offered fuel economy as well as performance, together with driving comfort in the sense that driving will not be a tiring process that requires you to rev your engine to high revs all the time to get decent pickup. Cruising around with city driving under 2,500rpm without feeling the engine is lacking in torque offers a more relaxing drive.

Recently, Volkswagen added a 1.4 litre turbocharged engine to it’s TSI family, joining the existing 1.4 litre twincharged engine. Interesting to note that the intercooler for this engine is water-cooled, and is integrated into the intake manifold. The use of a single turbocharger in this TSI-badged engine means TSI does not refer to the twincharging method of using both a turbocharger and supercharger for forced induction anymore, instead referring to small displacement, low fuel consumption, and high power Volkswagen engines.

This video focuses on the new 1.4 litre single turbocharger TSI engine, and differences with it’s twincharged sibling.

Check out the video after the jump.

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[Read more...]

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Volkswagen announces new 7-speed DSG gearbox

BorgWarner and Volkswagen has developed a new DSG (Direct Shift Gearbox) gearbox codenamed DQ200 which will succeed it’s current DG250 6-speed DSG gearbox from BorgWarner. One major difference relevant to the consumer would be it’s 7-gears compared to the first generation DSG’s 6-speeds.

The new 7-speed DSG now uses twin dry clutches, while the 6-speed DSG uses oil-submerged clutches. The new gearbox uses a pair of dry, organic bonded friction linings that do not require cooling, making the drivetrain more efficient through the extra ratio and the fact that less power is required for the gear selection and clutch servo system. The new 7-speed DSG weighs 79kg, compared to 75kg for the 6-speed unit, however despite being heavier, it is smaller. Oil volume has been reduced by 75% from 7 litres to 1.7 litres, thanks to the new dry clutches. This oil travels in two different circuits – one for the gear teeth, and the other feeds the gear actuators.

Since there are now more ratios to play with, the first gear of the new 7-speed DSG has had it’s ratio increased to provide stronger acceleration from a standstill, while the 7th gear acts as a high ratio overdrive to help ease on the fuel consumption on highway drives. Another feature would be the ability for the DSG gearbox to be mounted transversely. Thanks to it’s compact size, the DSG gearbox can now be mounted into smaller Volkswagens like the Polo as well as it’s larger siblings.

The new gearbox will first debut in 1.4 litre TSI and 1.9 litre TDI equipped Volkswagens. It only handles power outputs up to 170 PS and 250Nm of torque, so don’t expect it to appear in the more high performance models such as the Golf GTI.

In other Volkswagen news, the staple 1.6 litre FSI engine will be replaced by the recently announced 1.4 litre Turbo FSI engine. This is not the same as the 1.4 litre TSI engine – it only has a turbocharger without a supercharger and produces 122 PS maximum power and 200Nm of torque from as low as 1,500rpm, compared to the 1.4 litre TSI’s 140 PS and 170 PS ratings. All models using the 1.6 FSI engine will be replaced with a 1.4 Turbo FSI model, including the Golf, Golf Plus, Golf Estate, Jetta, Passat, and others.

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VW phases out automatics; makes way for DSG
[Read more...]

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Caparo T1 – an F1 car for the streets

Caparo T1

Ever heard of the Caparo T1? Well, now you have. It’s what you might consider calling a two-seater F1 car for the road. It’s powered by a 2.4 litre high revving V8 engine, similiar to an F1 car, and it makes up to 700 horsepower (only after some extra tuning though – some say only around 500hp at stock levels) at an astronomical 10,200rpm. Now that is a huge amount of horsepower for a car expected to weigh just under 470kg.

It can also corner almost like an F1 car – 3Gs of cornering force is achievable compared to an F1 car’s 4.5Gs. 0-100km/h takes only 2.5 seconds, but the most impressive feature is it’s braking ability – 0kmh to 160kmh and back to 0kmh in 8.5 seconds. That’s only 3.5 seconds to brake from 160kmh to a stand still, thanks to it’s 6-piston billet machined race calipers on steel brakes for the front, and 4-piston calipers for the rear.

The Caparo team consists of engineering legends like Gordon Murray, whom some of you might know as he is a columnist of Evo magazine. He was responsible for the McLaren F1. And that is enough to make you an engineering legend. The other team members are mostly ex-McLaren employees

A video after the jump.
[Read more...]

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International Engine Of The Year 2007 Results

The results of the 2007 International Engine Of The Year awards are out. The question everyone will be asking is – will the BMW 5.0 litre V10 be able to persevere and continue it’s reign as the award winner for the third time consecutively this year? Or will it be out-triumphed by a rival from another manufacturer, or perhaps another engine from BMW’s own stables? We find out what the results are after the jump!
[Read more...]

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9th International Engine of the Year results soon!

997 Twin Turbo

Come 9th May 2007, we’ll know the results of the 9th International Engine of the Year Awards. Last year BMW dominated the awards and won the main title for the second consecutive year with it’s 5.0 litre V10 found in the BMW M5 and M6.

This year’s contenders include Volkswagen’s 1.4 litre TSI engine which employs innovative use of both a supercharger and a turbocharger, Porsche’s 3.6 litre twin turbo which is the first petrol turbocharged engine to use a Variable Geometry Turbocharger, and Toyota’s 1.0 litre three-cylinder engine which is supposedly the lightest combustion engine on sale today. Of course, there’s Volkswagen’s 2.0 potent litre Turbo FSI.

For now, let’s recap the results for 2005 and 2006 in the posts linked below.

Related Posts:
2006 International Engine Of The Year Awards Results
BMW Dominates 2005 International Engine Of The Year Awards

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