Crank angle detection device
AssigneeHonda Motor Co., Ltd.
InventorsToru Kisaichi, Nozomi Okada, Satoru Okada
Life of this patent
Estimating the term…
Abstract
Provided is a crank angle detection device that includes an ACG rotor supported by an end of a crank shaft and configured to rotate integrally with the crank shaft, a metal-plate-made pulsar ring including a ring-shaped plate portion and a detected portion that includes a plurality of convex portions formed at an outer circumference of the ring-shaped plate portion, and being configured to rotate integrally with the ACG rotor with the ring-shaped plate portion fixed to the ACG rotor, and a magnetic sensor arranged at an outer circumference of the pulsar ring and configured to detect the detected portion. Such a crank angle detection device is capable of detecting a crank angle with high accuracy.
Claims14
A crank angle detection device, comprising:
- an ACG rotor supported by an end of a crank shaft and configured to rotate integrally with the crank shaft;
- a metal-plate-made pulsar ring formed as a separate component from the AGC rotor and operatively attached thereto, the pulsar ring having an outer diameter larger than an outer diameter of the ACG rotor, the pulsar ring including
- a ring-shaped plate portion fixed to a side face of the ACG rotor, and
- a detected portion comprising a plurality of convex portions formed at an outer circumference of the ring-shaped plate portion, wherein the detected portion is bent toward the outer circumferential face of the ACG rotor in an axial direction of the crank shaft, the detected portion defining a predetermined clearance between outer end portions of the convex portions and an outer circumferential face of the ACG rotor, the pulsar ring configured to rotate integrally with the ACG rotor;
- and
- a magnetic sensor arranged at an outer circumference of the pulsar ring and configured to detect the detected portion.
A crank angle detection device, comprising:
- an ACG rotor supported by an end of a crank shaft and configured to rotate integrally therewith, the ACG rotor having a side face with a plurality of arcuate ribs integrally attached to and thereon, each of the arcuate ribs having an outer circumferential face, wherein one of the arcuate ribs has an open notch formed therein;
- a metal-plate-made pulsar ring formed as a separate component from the AGC rotor and being operatively attached thereto, the pulsar ring having an outer diameter larger than an outer diameter of the ACG rotor, the pulsar ring including a ring-shaped plate portion having a circular opening formed therein with an inner circumferential face, and a tooth extending radially inward beyond the inner circumferential face, wherein the inner circumferential face is in contact with each of the outer circumferential faces of the arcuate ribs, and wherein the tooth fits into the open notch of said one of the arcuate ribs;
- the pulsar ring further comprising a detected portion that includes a plurality of convex portions formed at an outer circumference of the ring-shaped plate portion, each of the convex portions being bent toward an outer circumferential face of the ACG rotor in an axial direction of the crank shaft, the pulsar ring configured to rotate integrally with the ACG rotor with the ring-shaped plate portion fixed to a side face of the ACG rotor;
- and
- a magnetic sensor arranged at an outer circumference of the pulsar ring and configured to detect the detected portion.
Dependencies are inferred from the claim text.