Showing posts with label ZF. Show all posts
Showing posts with label ZF. Show all posts

Saturday, June 15, 2019

ZF develops dual-lens camera for commercial vehicles; launches in 2020 with integrated ADAS technologies

ZF has developed the Dual-cam two-lens camera specifically designed for the commercial truck market and to be used in concert with other ZF ADAS technologies. The camera features ZF’s longitudinal and lateral vehicle control expertise combined with Mobileye’s advanced EyeQ4 processor.
Part of ZF’s S-Cam4 family of automotive-grade cameras, the Dual-cam is designed to help meet varying global regulatory requirements and delivers advanced functions such as Traffic Sign Recognition, Lane Keeping Assist and Centering and object and pedestrian detection to enable Automatic Emergency Braking (AEB).
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ZF dual-cam image
To help ensure these technologies work effectively on commercial trucks a second lens is necessary for some of these advanced functions. For example, for pedestrian AEB in some instances a standard mono-camera with a 52-degree field can limit the ability to detect pedestrians or other vulnerable road users with enough time to actuate the brakes and help avoid or mitigate accidents for larger trucks in complex environments.
—Dan Williams, head of ADAS and autonomy for ZF Commercial truck applications
Having a second lens also enables redundancy for Level2+ functions—if one lens becomes blinded or non-functional the second lens helps ensure the camera can still operate due to multiple optical paths.
ZF’s camera technologies feature best-in-class optical performance and an enhanced fusion envelope. When combined with a full suite of the company’s ADAS technologies such as forward looking and corner radar, automated functions such as lane change assist, and traffic jam assist are enabled. These functions can form the basis for technologies such as truck platooning to make long haul trucking safer and more efficient.
ZF has a long history of commercial truck ADAS supply for major European truck makers, and will launch an advanced ADAS system for a major Japanese manufacturer in 2020. The launch will include ZF’s first application for its Image Processing Module where camera images will be processed in a separate unit from the camera housing.

Thursday, July 16, 2015

2015 Jaguar XE 2.0d 180 Portfolio UK review

Beautiful poise and supple handling earns this smallest Jag a class-leading recommendation. It's not perfect, mind, but it's very good.

What is it?: 

One of two all-important four-cylinder diesel versions of the newJaguar XE. You’ll have seen the cringe-worthy, overcooked TV advertising campaign and you may even have seen one on the road - or perhaps on the back of a vehicle transporter. But will you be driving one?
The numbers in the brochure give the XE every chance. With the entry-level diesel version priced at under £30,000, emitting less than 100g/km of CO2 and getting an 8.0in touchscreen multimedia system, sat-nav, DAB radio and cruise control as standard, it’s got the makings of a popular fleet saloon.
But it’s the higher-output 2.0-litre ‘Ingenium’ turbodiesel that’s under scrutiny here, and it has some equally competitive power, torque, performance, economy and emissions figures. We’re testing the eight-speed automatic version, in higher-end Portfolio trim.

What's it like?: 

Many of the same observations we made of the 2.0-litre turbocharged petrol XE road-tested earlier this month also apply to the oil-burner. It’s a handsome design and recognisably a Jaguar, but it’s not as stylish or daring as its bigger four-door siblings.
Gaydon has played it a bit safe with this car, and understandably so given that it has ambitious volume targets for it. The sharply drawn front-end and fuselage profile are stand-out visual features, although the car is less distinctive from the rear, where it borrows more styling cues from the German opposition.
Inside the cabin, the XE adopts a similar position to those of the XF and XJ relative to their market rivals. It’s not quite as plush or as accommodating as some at the price, but it makes a virtue out of its simplicity and compactness.
Occupant space for the driver is adequate, but snug rather than generous. A slightly high-mounted seat combines with a typically graceful swooping Jaguar roofline to limit headroom for taller drivers. The closeness of the extremities of the footwell, meanwhile, and the raised centre console, support your knees and elbows rather than restrict your movement.
Second-row cabin space is broadly competitive although short of the standard of the most practical compact executive saloons, so full-sized adults may struggle a wee bit for knee and head room. The boot is a fair size but the Audi A4 and BMW 3 Series offer a little more cargo space.
Jaguar isn’t known for outstanding material cabin quality and won’t be changing its reputation by out-dazzling the likes of Audi and Mercedes with the XE. The car’s interior is nonetheless very pleasant, fairly luxurious and consistently well-finished.
The black plastics and leathers of our test car were a bit plain, but lighter and more visually appealing two-tone upholsteries are offered. The car’s switchgear is all either grained or rubberised, and its instruments are pleasingly conventional and clear.
For a brand new engine, Jaguar’s ‘Ingenium’ 2.0-litre turbodiesel doesn’t make the greatest of first impressions. Starting with some notable shake and shudder, its audible signature is a little more coarse than the most refined four-cylinders, and it remains so under load and at high revs.
It offers strong low and mid-range pulling power, though, and while you’d bet that its outright performance isn’t quite segment-leading, it’s well metered out by ZF’s excellent eight-speed automatic ’box.
The transmission’s natural bias is to upshift early and keep the engine spinning at fairly low revs, where it’s at its quietest and most economical. Throttle response at those crankspeeds is good, however, and power delivery is pleasingly muscular and elastic.
Cycle through Dynamic, S and manual paddleshift modes and you can make the gearbox hold a ratio for as long as you like, but the reward for doing so isn’t as compelling as it might be. While the engine revs more freely than some, it doesn’t do so all that willingly beyond 4000rpm.
Better, really, to settle for a more typical, torque-propelled turbodiesel driving style. The XE 2.0d 180 can certainly be spirited along quite quickly that way, and has grip and handling composure to spare on the road.
The car’s most laudable qualities are its fluent, consistent and uncorrupted steering, its balance and precision when cornering and its expertly judged blend of body control compromised against a supple and quiet ride. On all of those fronts, it’s king of the compact executive class.
Our test car had standard passive suspension, although firmer sports springs and adaptive dampers are available as an option. But the XE needs neither to feel athletic and involving, and to conjure an effortless and instant sense of poise that a BMW 3-series will only approach in perfect specification and dynamic setting.
The XE’s steering is quite quick just off-centre but is predictable and feelsome thereafter. Moreover, the suspension doesn’t seem to need to resort to overly firm springing or uncompromising anti-roll control in order to maintain good grip, body control or directional response.
Ultimately it handles cross-country roads with a dexterity unknown to most small saloons, and manages to feel at once stable, compliant and well-damped at motorway speeds.

Should I buy one?: 

Do you care more about the dynamic performance of your business saloon than anything else? Since you’re reading this, we’ll assume that you do, and if you do, the XE makes a strong case for itself. Narrowly – and perhaps only for the likes of us – a winning one.
The XE doesn’t dominate its rivals like the current BMW 3 Series did at launch, leaving at least a bit to be desired on practicality, material quality and mechanical refinement. But it’s a competitive prospect even where’s it's relatively weak: something you’d never have said of the old X-type.
Moreover, Jaguar has evidently concentrated its budget and effort where it knows it can create a real selling point for the XE: on driver appeal. And, as ever, we’re a sucker for it.

Sunday, January 18, 2015

ZF showcasing second-generation 8HP 8-speed transmission at NAIAS; additional 3% boost in fuel savings

At the North American International Auto Show (NAIAS) in Detroit, ZF is presentingits broad technology portfolio including the second generation of the 8HP 8-speed transmission. The new generation offers further developments ranging from lower drag torques and higher spread to an improved torsional vibration absorption.
Compared to the already highly energy-efficient first generation of the 8HP (earlier post), the second-generation unit achieves an additional three percent of fuel savings. The first generation of the eight speed 8HP saved up to 6% more fuel—and its stop-start variant up to 11% more—that the second-generation ZF 6-speed automatic transmission. With its flexible modular construction system, ZF’s 8HP covers a broad torque range between 300 and 1,000 N·m (221 to 738 lb-ft) and can be adapted to fit hybrid or all-wheel drive applications.


The transmission comprises 8 gears, four gear sets and five shift elements. ZF has further optimized the new transmission generation for the requirements of modern engine technology. In order to meet the forthcoming CO2 emission specifications without losses in terms of torque and performance, there are two central trends when it comes to combustion units: downsizing (which means turbocharged engines with fewer cylinders and less engine displacement); and downspeeding, which is the reduction of the engine speeds combined with a maximum torque that is applied at a very early stage.
The reduction of the speeds in particular demands transmissions with a higher spread; accordingly, ZF has increased it from 7.0 to 7.8 on the new 8HP by means of optimized gearsets.
This measure alone reduces the speed across all gears by 50 revolutions per minute on average and reduces fuel consumption by almost one percent.
—Dr. Jürgen Greiner, head of Passenger Car Transmission Development at ZF Friedrichshafen AG
Furthermore, the ZF developers have succeeded in once again reducing the internal transmission losses. This is primarily ensured by the new multidisk separation. Additional springs integrated into the multidisk packages of the shift elements ensure that the friction shift elements are almost fully opened and, consequently, cause less drag torque.
Compared to the first 8HP model range, we have reduced the power losses by more than two-thirds with the new generation.
—Dr. Greiner
Meanwhile, a further innovative function minimizes the creeping torques: A clutch is now fully opened during deceleration and when the vehicle is stationary; it is no longer necessary to brake against the drive, explained Greiner. Another positive effect is that the oil pump belonging to the ZF automatic transmission works with a system pressure that has been reduced from 5 to 3.5 bar and, as a result, requires less energy overall.
Furthermore, the objective was to take the changing vibration behavior of the increasingly economical yet, at the same time, more powerful downsizing units into account. Therefore, all 8HP automatic transmissions feature particularly advanced torsional vibration dampers.
These dampers eliminate the vibrations that occur on the engine side so that they are unable to move further along and into the driveline and the body. The newly developed torque converter contributes to downspeeding because the hydrodynamic transmission of power can be bridged even more quickly—this enables traveling with a closed lock-up clutch at an early stage and at an extremely low engine speed.
The tailored, fuel-efficient uncoupling of the transmission in connection with a temporary engine stop, the so-called coasting function, is now possible at speeds up to 160 km/h (99 mph). At the other end of the speed scale, ZF has further optimized the optional start/stop function of the 8HP: After the vehicle has come to a stop, it stops the engine without any discernible delay, instead of after 1.5 seconds as was previously the case.
ZF did not neglect dynamics; among other things, the new transmission control unit enables nested multiple downshifts which permits the 8HP to respond in an even more spontaneous and dynamic manner where necessary.
The new 8HP entered volume production at the start of July 2014 in the BMW 520d as the 8HP50 version that is designed for torques of up to 500 N·m. The 8HP75 will be part of the ZF portfolio for drives with even higher torque of up to 750 N·m.
Gradually, all further automotive manufacturers to whom ZF has already supplied the 8HP in more than 1,000 vehicle applications will utilize the latest generation of the 8-speed automatic transmission.