The DYNA Products group of Barber-Colman Co. has introduced a new engine control unit, the model S-15G, designed for use on emission compliant industrial LP and gaseous engines primarily in lift truck applications. The S-15G, while providing full authority engine management, is designed specifically as a cost-effective system for use in gaseous-fueled material handling rod personnel lift equipment applications.
"This is a very cost sensitive market, and the S-15G was developed as a cost effective way to meet new emissions regulations," said, Thomas Hafele, product/market manager for the DYNA products group Loves Park, Ill. "It can be applied, with minimal changes to existing systems, minimizing installation time and costs for both engine and equipment manufacturers. It can also upgrade older trucks where drive-by-wire control is desired."
Hafele added that the S-15G base package will be the same for both the 2004 and 2007 emissions regulations, with enhancements available to meet specific needs The S-15G is designed for use on a range of four- and six-cylinder gas engines mostly in the 2.0 L and 4.3 L range. It is currently used on production engines in Mitsubishi-built forklifts. Features of the new ECU include drive-by-wire speed control, a proactive closed loop air/fuel control, an integral map sensor for load compensation, engine temperature compensation and complete engine diagnostics.
Inputs include: an rpm trigger input via a 12 V square wave or ignition coil signal; integral manifold absolute pressure sensor; pedal position sensor input; engine temperature compensation; rod Lambda sensor input. Outputs include an electronic governor control signal; air/fuel ratio control signal; optional LP injection control; LP lockout valve control; and a check engine light.
One of the key S-15G features is that the system can forward calculate the air/fuel control via speed and load, and thus anticipate changes in operation, as the engine is mapped, making the system much more responsive to changes in operation, said Mark Fisher, fuel systems engineering manager. This could also allow the equipment manufacturer to size a smaller catalyst.
Fisher added that the S-15G can also control the engine to deliver full torque up to the engine's full rated speed as the drive-by-wire feature eliminates pneumatic governing from the system. "In some applications it can make a 2.0 L engine operate like a 2.4 L," he said.
The user can input, via a data interface, a variety of operating parameters, including pedal responsiveness and unique diagnostic codes. As such, Fisher said the S-15G controller can be used by both hydrostatic or hydrokinetic lift trucks. The user can also specify over temperature protection and throttle limit shutdown allowing the vehicle to have "limp home" capability.
Other features include an engine temperature sensor that senses engine block temperature, not cooling temperature, allowing it to be installed without tapping into the cooling system. The system also senses hydraulic pump demand via engine load allowing the system to compensate for hydraulic or shock loads.
The automatic altitude compensation feature is seen as especially important for rental applications, as the engine does not have to be adjusted for the altitude. The S-15G also automatically compensates for differences in fuel composition, a consideration for equipment used in international markets. A Can-bus is an option, with interest coming from hydrostatic forklift manufacturers, mostly for European use
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment