Electric Boosting System for Light Truck/SUV Application

Abstract

It was shown that in order to make full use of additional capabilities of e-Turbo TM wide compressor flow range is required. Variable geometry compressor (VGC) technology developed under a separate project was evaluated for incorporation into e-Turbo TM designs. It was shown that the combination of these two technologies enables very high torque at low engine speeds. Designs and hardware combining VGC and e-Turbo TM are to be developed in a future project.There is concern about high power demands (even though momentary) of e-Turbo TM . Reducing the inertia of the turbocharger can reduce power demand and increase battery life. Low inertia turbocharger technology called IBT developed under a separate project was evaluated for synergy with e-Turbo TM designs. It was concluded that inertial reduction provided by IBT is very beneficial for e-Turbo TM . Designs and hardware combining IBT and e-Turbo TM are to be developed in a future project. e-Turbo TM provides several additional flexibilities including exhaust gas recirculation (EGR) for emissions reduction with minimum fuel economy penalty and exhaust temperature control for aftertreatment. In integrated multi-parameter control system is needed to realize the full potential of e-Turbo TM performance. Honeywell expertise in process control systems involving hundreds of sensors and actuators was applied to demonstrate the potential benefits of multi-parameter, model based control systems. e-TurboTM ON/OFF recording under road load conditions 19. Statistical analysis of e-Turbo TM duty cycle under representative road conditions 20. Finite Element Analysis of heat transfer in an e-Turbo TM 21. Rotor and stator temperature of e-Turbo TM under severe duty cycle conditions 22. Photograph of second generation e-Turbo TM hardware 23. Transient response of a diesel engine with e-Turbo TM under cold and hot conditions 24. Transient response of e-Turbo TM diesel engine powered passenger vehicle in second gear 25. Transient response of e-Turbo TM diesel engine powered passenger vehicle in third gear 26. Simulated response of a diesel engine powered vehicle with downsized engine with and without electrically assisted boost 27. Boost response of a baseline VNT diesel engine and e-Turbo TM diesel engine 28. Boost response of a high performance diesel engine, VNT diesel engine and e-Turbo TM diesel engine illustrating torque shaping potential 29. Electrical power generation and fuel economy improvement with e-Turbo TM 30. Illustrating that electrical power generation with e-Turbo TM is not possible under low load-speed conditions and showing 0.5 to 4.0% improvement in fuel economy over the load-speed range 31. Illustrating turbine efficiency drop-off with supplementary electrical power supply 32. Simulated baseline (no e-Turbo) torque characteristics of a 4.0 liter diesel engine equipped with bi-turbo and single turbo configurations 33. Simulated transient response characteristics of a 4.0 liter diesel engine at 800, 1000 and 1250 engine rpm in a bi-turbo configuration 34. Simulated...