Variable Shift Schedule Control for Integrated Starter Generator Equipped Hybrid Vehicles Visteon Corporation - Higher Voltage Vehicle Systems Technical Center - Dearborn

Format:

Conference/Event

Author/Creator:

Denton, Daniel S., author.

Conference Name:

Future Transportation Technology Conference and Exposition (2001-08-20 : Costa Mesa, California, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2001

Summary:

In this study, conducted during 42V product development by Visteon, a Variable Shift Schedule1 (VSS) control strategy was designed and tested on a vehicle equipped with an Integrated Starter Generator (ISG) and a step ratio automatic transmission. The strategy incorporates two ratio change points (a high point and a low point) for a given vehicle speed and driver demand torque (measured by throttle position). By evaluating battery state of charge (SOC) and torque boost available from the electric drive system, the strategy can interpolate the earliest point for a change in ratio. It can also choose to "lock" the torque converter elements within the automatic transmission (AT) while continuing to provide consistent vehicle performance. The result is the ability to operate the internal combustion (IC) engine in a range of greater efficiency during the up-shift sequence. In addition the automatic transmission is able to remain in higher ratio ranges for extended durations. This effectively creates a vehicle that operates at levels of greater fuel efficiency and lower emissions. Computer Aided Engineering (CAE) modeling experiments are carried out to prove the validity of the proposed transmission control strategy and support the claims

Notes:

Vendor supplied data

Publisher Number:

2001-01-2496

Access Restriction:

Restricted for use by site license