Products Hydraulics & pneumatics
Variable hydraulic valve control system reduces vehicle fuel consumption and CO2
The Schaeffler Group and Fiat Powertrain have developed what is believed to be the world’s first fully variable hydraulic valve control system. Designed for automotive power transmission systems, UniAir is said to reduce vehicle fuel consumption and cut
engines and in its small volume two-cylinder engines that are currently being developed. UniAir is a cam-actuated, electro-hydraulic
CO2 emissions by up to 25%. It provides improvements in start-up, part
load and acceleration behaviour of the vehicle. During the engine warm-up phase, for exam- ple, hydrocarbon (HC) emissions are up to 40% less, and nitrogen oxide (NOx) is reduced by up to 60%. In addition, UniAir offers a greatly improved driving experience through more power, higher engine torques and optimised engine response. This fully variable hydraulic valve control
system will make its debut on Fiat’s new Alfa MiTo 1.4 MultiAir. For manufacturers, it enables car engines to be downsized – Fiat uses UniAir in its four-cylinder FIRE series of
valve train system. The fully variable valve control can be used for petrol and diesel engines and is supplied via the existing engine oil circulation system. For petrol engines, it enables throttle-free, continuously variable, software-based load control across the entire engine map. With diesel, regulation of the temperature of the combustion chamber is achieved due to the precise control of exhaust gas recirculation rates. The effective compres- sion ratio in the cylinder can also be varied and a homogeneous combustion ensured. It also allows variations in the valve
stroke, and in the opening and closing of valves several times during one cycle, at different points in time. Therefore, the system significantly expands the potential of traditional valve train mechanisms.
Positive displacement internal gear pumps
Larger pumps and more drive options have been added to Michael Smith Engineers’ HNP range of positive displacement internal gear pumps. These are suited to liquids transfer duties in chemical processing, pharmaceutical and industrial applications. The HNP 11500 Series provide a performance output of flows between 0.2 to
1150 ml/min and differential pressures between 0-60 Bar or 0-150 Bar, depending on the viscosity of the process fluid. Designed to deliver smooth, precise pulse-less flows with high differential pressures,
these rotary pumps feature an externally toothed internal rotor and an annular tooth external rotor. These are slightly eccentric to each other and, during rotation of the rotors around their offset axis, the pumping chambers simultaneously increase on the suction side and decrease on the delivery side of the pump. This results in a homogeneous flow rate being generated between the kidney-shaped inlet and outlet. AC, DC and an ATEX rated explosion proof AC motor versions are available.
Michael Smith Engineers
T: 0800 316 7891 Enter 263
According to the company, UniAir can
provide full coverage of every conceivable air- flow possibility, from zero lift to maximum lift, dictated by the camshaft lobe for each individ- ual cylinder or valve. With the de-throttling of the engine, it can provide early intake-valve closing or late intake-valve opening in order to maximise engine breathing relative to certain engine speed and load conditions.
Schaeffler
Enter 262 T: 0121 313 5870
Pressure valve
A high-flow proportional pressure relief valve with integrated control electronics has been launched by Eaton Corporation. This plug and play unit – the KBCG5-3 – has seven-pin connector hook-up. It complements the KB proportional valve series by extending flow capability up 40 litre/min. Features include on-board digi-
tal electronics with ramp adjust- ment; IP65/67 protection etc.
Eaton Hydraulics Group www.eaton.com
Enter 264
World’s first UV ink pump has been developed
UV inks crystallise easily, therefore efficient ink transfer can be difficult. As a solution, the ARO
Fluid Technologies busi- ness of Ingersoll Rand Industrial Technologies has released what it claims is the world’s first
UV ink pump. The pump is designed
specifically to keep shear and thermal energy at a minimum, allowing for the success-
ful transfer of UV materi- als. According to the company, it is designed
to drastically reduce operating costs in the chemical process- ing, printing and packaging industries while allowing for the automation of UV ink and liquid transfers.
Ingersoll Rand T: 01942 257171
Enter 265 www.ingersollrandproducts.com
New range of hydro-pneumatically operated pallet stoppers
Hydro-pneumatically operated pallet stoppers have been launched by Weforma Dämpfungstechnik. With the WPS 320 and WPS 500, the damping is carried out hydraulically, only the lowering of the pallet stopper for the release of the
pallet and resetting to the initial position are pneumatic. Because the damping is only pneumatic, the energy is simply stored, while during hydraulic damping the stroke is transferred to heat. As a result, the supporting forces are minimal. For example, with the WPS 500 at a speed of 40m/min, masses of up to 300kg can be decelerated, at a speed of 6m/min even up to 1200kg. The pallet stoppers are also adjustable through a scale of 0-8. During the assembly of industrial and household goods on pallet circulation systems, the pallet stoppers
fulfil two functions. They provide smooth deceleration of one or more pallets that, during the production process, are stored at determined positions on the belt and then released individually. There, the pallet stopper provides smooth deceleration to prevent damage to the manufactured parts through hard impact. It simultaneously ensures positional accuracy when reaching the end position.
Weforma Dämpfungstechnik
www.weforma.com
48
Enter 266
MARCH 2010 Design Solutions
www.schaeffler.co.uk
Compact gauge valve developed
Small and lightweight, the stain- less steel Swagelok compact gauge valve provides quick access for the isolation and venting of pressure gauges. These are suitable for use with
the company’s pressure gauges. The streamlined body features Swagelok tube fitting end connec- tions for leak-tight performance, and robust tube grip and vibration resistance. A purge valve is machined directly onto the body for easy bleeding of trapped fluid pressure between the valve seat and gauge upon shutoff, while a permanently assembled purge cap is crimped to the valve body for operator safety and to prevent accidental disassembly. The valve is rated for temper-
atures up to (232°C), depending on stem and packing, and for pressures up to 4000 psig (275 bar).
Swagelok www.swagelok.com Enter 267
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