Patent ID: 7365521
Filing Date: 2008-04-29
Classification: F02D,F02N,H02P

Abstract:
1. A method of operating an engine with permanent magnet generator (PMG) and power conversion unit (PCU) including the steps of: (1) initiating a start sequence; (2) monitoring PMG rotational speed to assist in proper execution of an engine start; (3) generating an AC excitation by use of a PCU, wherein the AC excitation is used to operate the PMG as a motor and cause an engine to rotate; (4) controlling speed of the PMG by controlling the AC excitation generated in the PCU during an engine start including at least one of: (5) controlling torque produced by the PMG during an engine start by controlling the AC excitation applied by the PCU including at least one of: (6) cutting of starter assist automatically at a predetermined PMG speed, monitoring for fault conditions prior to, during, and after the engine start to ensure that a proper action is taken including at least one of: (7) controlling the start sequence by executing a control logic algorithm including at least one of: