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8 things you should know about the Lexus LC 500h powertrain

Lexus unveiled the LC 500h today in The Netherlands, and I got to take a look inside its new hybrid system. On one hand it seems like a box of magic – it combines two seemingly incompatible transmission types into one package. But that's also the ingenious simplicity of the thing. We don't have all of the details on how it all works yet, but here's a rundown of the high points.Efficient business in front, low-key party in the back. What makes it all work is the mullet of transmissions. For the new hybrid transmission, Lexus used the Toyota Hybrid Synergy Drive/Lexus Hybrid System – which consists of an e-CVT with a planetary gearset and two electric motors (one for charging the battery, the other for motivation and regen) – and grafted a conventional four-speed automatic onto the back. The two units actually coexist in one package, with the e-CVT making things efficient and the automatic expanding the capabilities. So at the low end, the system can deliver more torque, and the engine can also run at lower rpm on the highway. It's all thanks to those fixed gear ratios, and it's surprisingly simple.Except it's not that simple. This is where the virtual gear ratios come in. Like current Lexus hybrids, the system has ratios it can call up with the e-CVT. In this case, there are six virtual ratios to complement the four real physical ratios, for a total of 10 "gears" at the transmission's disposal. (Not coincidentally, the V8 LC 500 coupe has a 10-speed automatic.) One of the four fixed gears is always engaged when the car is moving, so the 10 ratios come about from combinations of what the e-CVT in front and the automatic in the back are doing. In other words, all 10 ratios are variations on the four fixed gear ratios, which means that all 10 gears could be considered virtual.It won't use all the gears all the time. In Eco mode, the car will start off on electric power and skip the first couple of "gears." When it's set to Sport or Sport +, the engine will be engaged from a stop and the transmission will select the lowest ratio. The sportier modes will also ignore the top couple of gear ratios.It can drive faster with the engine off. In a Lexus GS 450h with the Lexus Hybrid System, for example, at speeds above 62 mph or so the engine has to start up. This is because something needs to take up some slack from the battery-charging motor-generator or else it will start spinning too quickly.

Lexus rounds out the LS line with 500h hybrid

The 2018 Lexus LS range will feature a full hybrid LS 500h version, which will be presented to the public at the Geneva Motor Show in March. The LS 500h is expected to use a 3.5-liter naturally aspirated V6, also seen in the LC 500h coupe. The platform sibling LC 500 coupe does have an available V8 version in its non-hybrid guise, but perhaps Lexus has seen fit to equip only the sportier coupe with an eight-cylinder – a major deviation from the previous V8-only LS series bloodline. The earlier LS 600h was the first production full hybrid vehicle with a V8 engine, producing 439 horsepower; since the LC 500h's hybrid powertrain only produces 354 hp, the earlier car is likely to remain the horsepower king. The coupe still hits 60 mph under five seconds, so the big sedan should also be able to move briskly. Almost 30 years have passed since Toyota unveiled its Lexus luxury brand and the LS 400 flagship, as the UCF10 body LS 400's design was locked in spring 1987 and the wraps came off in January 1989. The LS 400 of those days was often deservedly revered, and in the following decades it has spawned numerous new generations of high-end Lexus LS sedans. But in case the latter-day LS models have become just a touch too Camry- or Avalon-like, the 2018 version should bring a new edge. Related Video: News Source: LexusImage Credit: Lexus Green Geneva Motor Show Lexus Hybrid Luxury lexus ls