PI SHURLOK Ltd, WALLFLASK Ltd, PI GROUP Ltd and Pi Group Ltd | Date: 2000-01-25
ELECTRONIC APPARATUS, NAMELY AUTOMOTIVE POWER TRAIN SIMULATORS FOR USE IN THE TEST AND DEVELOPMENT OF AUTOMOTIVE ELECTRONIC CONTROL MODULES; COMPUTER PROGRAMS, NAMELY COMPUTER PROGRAMS FOR THE SIMULATION OF AUTOMOTIVE POWER TRAINS FOR THE TEST AND DEVELOPMENT OF AUTOMOTIVE ELECTRONIC CONTROL MODULES.
Pi Shurlok LLC | Date: 2008-11-28
Vehicle locating, tracking and security apparatus programmed to use global positioning systems and cellular telecommunications; electronic control apparatus for vehicles suspensions. Fittings and accessories for land vehicles, namely, motor vehicle alarm systems. Providing an on-line computer database for the reporting and tracking of vehicle movement and location for business purposes; tracking, locating and monitoring of vehicles for business purposes. Maintenance and updating of computer hardware relating to vehicle locating, tracing, tracking and security. Telecommunication services, namely, electronic transmission of communications, data, messages and documents, all for purposes of locating, tracking and security. Information technology and computer related services, namely, computer design, computer programming, and maintenance and updating of computer software, all relating to vehicle locating, tracing, tracking and security. Stolen vehicle tracking.
Nagar N.,Pi Shurlok LLC |
He X.,Pi Shurlok LLC |
Iyengar V.,Pi Shurlok LLC |
Acharya N.,Pi Shurlok LLC |
And 4 more authors.
SAE International Journal of Commercial Vehicles | Year: 2010
This paper describes the joint development by Tenneco and Pi Shurlok of a complete diesel engine aftertreatment system for controlling particulate matter emissions. The system consists of a DOC, DPF, sensors, controller and an exhaust fuel injection system to allow active DPF regeneration. The mechanical components were designed for flow uniformity, low backpressure and component durability. The overall package is intended as a complete PM control system solution for OEMs, which does not require any significant additions to the OEM's engine control strategies and minimizes integration complexity. Thus, to make it easier to adapt to different engine platforms, ranging from small off-road vehicle engines to large locomotive engines, model-based control algorithms were developed in preference to map-based controls. Pi's recently-developed general-purpose OpenECU electronic controller, based on the MPC-5534 processor core, was applied to run the advanced 1-D DOC and 0-D lumped DPF thermo-chemical models in real time to control the fuel injection system. The system was integrated with a Cummins 5.9 L engine in the engine dynamometer laboratory at Tenneco. The control algorithm and models were first calibrated offline using the experimental and baseline engine data using Hardware-In-the-Loop test environment. The control strategies were then tested in real time on the engine dynamometer. The models were able to predict DOC and DPF parameters such as temperatures, pressure drop, soot load and emissions in real time with good accuracy. These "virtual sensor" measurements provide great scope for advanced diagnostic strategies to detect component or sensor failures. During active regeneration, the control strategy was able to control the DOC outlet temperature within a range of +/-50 °C from the set target and effectively regenerate the DPF under engine transients. The HC slip measured was less than 60 PPM during active regeneration. These system performance results confirmed the feasibility of active DPF regeneration in the context of increasingly stringent regulations for emissions limits and increasingly complex diagnostic requirements. © 2009 SAE International. Source