Kathleen Ellen Bailey

Regenerative braking system for a hybrid electric vehicle

This paper discusses a regenerative braking system (RBS) for a parallel hybrid electric vehicle (PHEV) that performs regenerative energy recovery based on vehicle attributes, thereby providing improved performance, efficiency and reliability at minimal additional cost. A detailed description of the regenerative braking algorithm is presented along with simulation results from a dynamic model of the PHEV exhibiting the regenerative braking performance.

Vehicle system controller design for a hybrid electric vehicle

As a way to meet the challenge of developing more fuel efficient and lower emission producing vehicles, auto manufacturers are increasingly looking toward revolutionary changes to conventional powertrain technologies as a solution. One alternative under consideration is that of hybrid electric vehicles (HEV). An HEV combines some of the benefits of electric vehicles (efficient and clean motive power supplied by an electric motor, regenerative braking) with the features of a conventional vehicle that consumers expect (convenient refueling, long driving range). However, these benefits come with increased complexity in the powertrain design. Instead of having one motive power source, there are two that can each act independently or in combination. The complexity of an HEV powertrain together with the vehicles many operating modes demand that a supervisory or hybrid controller be developed at the vehicle level to guarantee stable and consistent operation. Inherent in this controller is a logical structure to guide the vehicle through its various operating modes and a dynamic control strategy associated with each operating mode to specify the vehicle demands to each subsystem controller. Capturing all possible operating modes and guaranteeing smooth dynamic control transitions from one operating mode to the next are significant challenges in the controller design. A formal method for designing this supervisory controller has been developed. A description of the method and its application to an HEV will be presented.

Parallel hybrid electric vehicle torque distribution method

The paper deals with the supervisory control used in a Vehicle System Controller (VSC) of a Parallel Hybrid Electric Vehicle (PHEV). A description of the torque distribution algorithm that determines the prorated amount of torque demanded of each of the tractive devices to meet the drivers demand and the energy management scheme is given. The PHEV hybrid operating modes and PHEV dynamic model are presented and simulation results are shown depicting the seamless transitions from one hybrid mode to another as coordinated by this supervisory controller.

Parallel hybrid electric vehicle dynamic model and powertrain control

Contains a description of mathematical modeling, analysis, and simulation in an iterative process including development of parallel hybrid electric vehicle (PHEV) hardware, system performance measures, computer control software, and complete PHEV powertrain system synthesis. A PHEV is synthesized using a conventional spark ignited (SI) internal combustion engine (ICE) power plant-alternator combination, a dry clutch, and manual transmission/differential with an AC induction traction motor attached after the differential. An operating strategy for this PHEV is presented.

Control system and dynamic model validation for a parallel hybrid electric vehicle

Contains a description of mathematical modeling, analysis, and simulation in an iterative process including development of parallel hybrid electric vehicle (PHEV) hardware, system performance measures, computer control software, and complete PHEV powertrain system synthesis. A PHEV is synthesized using a conventional spark ignited (SI) internal combustion engine (ICE) power plant-alternator combination, a dry clutch, and manual transmission/differential with an AC-induction traction motor attached after the differential. An operating strategy for this PHEV is presented. Simulations and test data are presented to demonstrate model validation.

Hardware-in-the-loop vehicle and powertrain analysis and control design issues

Powertrain and vehicle control systems are rapidly becoming extremely sophisticated. In order to maintain product technology competitiveness, minimize product and control system complexity, and contain development costs and timing, correspondingly more sophisticated control system development tools and methodologies are required. Hardware-in-the-loop simulation technology offers promise to bridge the challenging gap between system modeling and actual prototype system hardware implementation. This paper contains a discussion of some of the principal analytically related issues associated with a HIL powertrain laboratory.

Dynamic Model and Control of a Hybrid Electric Vehicle1

Abstract This paper describes the Low Storage Requirement (LSR) Hybrid Electric Vehicle configuration and discusses the advantages of this type of hybrid vehicle. A description of the LSR operating strategy and dynamic vehicle model are presented including simulation results.

Dynamic Model of a Pre-Transmission Parallel Hybrid Electric Vehicle

Abstract This paper describes mathematical modeling, analysis, and simulation in an iterative process including development of Parallel Hybrid Electric Vehicle (PHEV) hardware, system performance measures, control software, and complete PHEV powertrain system synthesis. A PHEV is synthesized using a conventional spark ignited (SI) internal combustion engine (ICE), a dry clutch between the ICE and an alternating current (AC) induction traction motor, a converterless automatic. transmission, and a differential and halfshafts that drive front wheels. An operating strategy is presented with simulations that demonstrate performance.