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Title: Crankshaft position sensing with combined starter alternator

Abstract

A crankshaft position sensing apparatus is described for use with an engine having a combined starter/alternator assembly. The crankshaft position sensing apparatus includes a tone ring with a sensor and bandpass filter, having a cylinder identification input from a camshaft sensor, and a gain limiter. The sensing apparatus mounts near the rotor of the combined starter/alternator assembly. The filtered crankshaft position signal can then be input into a vehicle system controller and an inner loop controller. The starter/alternator assembly in combination with an internal combustion engine is particularly useful for a hybrid electric vehicle system.

Authors:
;
Publication Date:
Sponsoring Org.:
US Department of Energy
OSTI Identifier:
20075860
Alternate Identifier(s):
OSTI ID: 20075860
DOE Contract Number:
AC36-83CH10093
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 13 Jun 2000
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; INTERNAL COMBUSTION ENGINES; IGNITION SYSTEMS; ALTERNATORS; MECHANICAL SHAFTS; ORIENTATION; MONITORS; DESIGN; HYBRID ELECTRIC-POWERED VEHICLES

Citation Formats

Brandenburg, L.R., and Miller, J.M. Crankshaft position sensing with combined starter alternator. United States: N. p., 2000. Web.
Brandenburg, L.R., & Miller, J.M. Crankshaft position sensing with combined starter alternator. United States.
Brandenburg, L.R., and Miller, J.M. Tue . "Crankshaft position sensing with combined starter alternator". United States. doi:.
@article{osti_20075860,
title = {Crankshaft position sensing with combined starter alternator},
author = {Brandenburg, L.R. and Miller, J.M.},
abstractNote = {A crankshaft position sensing apparatus is described for use with an engine having a combined starter/alternator assembly. The crankshaft position sensing apparatus includes a tone ring with a sensor and bandpass filter, having a cylinder identification input from a camshaft sensor, and a gain limiter. The sensing apparatus mounts near the rotor of the combined starter/alternator assembly. The filtered crankshaft position signal can then be input into a vehicle system controller and an inner loop controller. The starter/alternator assembly in combination with an internal combustion engine is particularly useful for a hybrid electric vehicle system.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jun 13 00:00:00 EDT 2000},
month = {Tue Jun 13 00:00:00 EDT 2000}
}
  • A crankshaft position sensing apparatus for use with an engine (16) having a combined starter/alternator assembly (18). The crankshaft position sensing apparatus includes a tone ring (38) with a sensor (36) and bandpass filter (46), having a cylinder identification input from a camshaft sensor (48), and a gain limiter (54). The sensing apparatus mounts near the rotor (30) of the combined starter/alternator assembly (18). The filtered crankshaft position signal can then be input into a vehicle system controller (58) and an inner loop controller (60). The starter/alternator assembly (18) in combination with an internal combustion engine is particularly useful formore » a hybrid electric vehicle system.« less
  • This patent describes an electronic ignition system for controlling as a function of at least one selected engine parameter the ignition instant of an internal combustion engine having at least one cylinder, the cylinder having a piston and a rotatable crankshaft coupled to the piston to be rotatably driven as combustions occur within the cylinder at the ignition instants, the crankshaft having at least one reference position defining a positional relationship of the crankshaft to the cylinder. The electronic ignition system comprising: (a) a rotor affixed to rotate with the crankshaft and having a plurality of reference indicia thereon positionallymore » related with respect to the reference position. The reference indicia being disposed at points equally spaced by a predetermined arc of crankshaft rotation from each other about the rotor, at least one of the points having a missing indicium and disposed in a predetermined relation to the reference position of the crankshaft; (b) a single sensor disposed at a point fixed in relation to the rotation of the crankshaft for providing a train of signals, each signal occurring in time when each of the plurality of reference indicia rotates past the fixed point (c) missing indicium means responsive to each sensor signal of the train for measuring an arc of crankshaft rotation from the corresponding, current indicium and if the measured arc of crankshaft rotation exceeds the predetermined arc of crankshaft rotation, for providing a missing indicium signal.« less
  • A pulse generator of the corona discharge type is described for sensing engine crankshaft angle in an engine control system having a rotor with a plurality of pulse generating elements angularly spaced about the rotor axis. In order to generate as many pulses for each revolution of the rotor as desired to permit accurate measurement of the angular displacement of the rotor axis from a reference point, the rotor is constructed of a disc having a plurality of angularly equally spaced apart segmented regions to act as the pulse generating elements, and at least one electrode is stationarily mounted withmore » respect to the disc to form an air gap to generate corona discharges thereacross in succession in cooperation with each one of the segmented regions upon rotation of the disc. An impedance element is provided to develop a voltage signal in response to the generation of the corona discharge.« less
  • This patent describes a motor vehicle including an engine and a starter/generator which is adapted to crank the engine during a starting mode before the engine has been started, and to be driven by the engine for generating electric current during a generating mode after the engine has been started, a system of electrical distribution comprising: a lower storage battery for supplying relatively low voltage operating current to low voltage vehicle electrical loads, and an upper storage battery operative with the lower storage battery to supply relatively high voltage electrical current to the starter/generator during starting mode and to othermore » high voltage vehicle electrical loads; charging control means connecting the starter/generator to the lower and upper storage batteries during the generating mode, such that the starter/generator supplies power solely to the lower battery when the engine speed is lower than a reference speed below which the output voltage of the starter/generators is limited, and to the serial combination of the upper and lower batteries when the engine speed is at least as great as the reference speed for battery charging; and charge equalizing means including an energy storage inductor connected to the junction of the upper and lower batteries, and converter means.« less
  • A switched reluctance machine based system, whether a motor drive or a starter/generator, requires the rotor position to be determined to commutate at the correct instants. This paper compares the performance of a high-speed switched reluctance starter/generator (SR S/G) system when operating with a resolver to the performance when operating resolverless, or sensorless, using an electronic position sensing (EPS) subsystem for rotor position estimation. A brief overview of the SR S/G system is given, followed by the approach for sensorless system operation. Test results are given, and system efficiency is compared, for both approaches when operating both as a startermore » and as a generator. Minimal difference is seen in system efficiency, with peaks at over 75% for start-mode and at over 79% for generate mode, for both resolver-based and sensorless operation.« less