Spark plug electrode wearing rate estimating method and apparatus
AssigneeNgk Spark Plug Co., Ltd.
InventorTakahiro Karumi
Life of this patent
Estimating the term…
Abstract
A spark plug electrode wearing rate estimating method for a spark plug in which spark discharge occurs between two electrodes by application of voltage generated by an ignition coil, includes the step of estimating a wearing rate of a first electrode in one spark discharge based on a temperature of the first electrode, and a spark discharge voltage and supply energy from the ignition coil. The first electrode contains any one of Ir, Ru, W, and Ni as a main component.
Claims6
A spark plug electrode wearing rate estimating apparatus for a spark plug in which spark discharge occurs between two electrodes by application of voltage generated by an ignition coil, the apparatus comprising:
- a first electrode that is at least one of the two electrodes and that contains any one of Ir, Ru, W, and Ni as a main component;
- a first obtaining unit configured to obtain information on a temperature of the first electrode, and spark discharge voltage and supply energy from the ignition coil;
- and
- a first wearing rate estimation unit configured to estimate a wearing rate of the first electrode in one spark discharge based on the information.
A spark plug electrode wearing rate estimating apparatus for a spark plug in which spark discharge occurs between two electrodes by application of voltage generated by an ignition coil, the apparatus comprising:
- a second electrode that is at least one of the two electrodes and that contains Pt as a main component;
- a second obtaining unit configured to obtain information on a spark discharge voltage and supply energy from the ignition coil;
- and
- a second wearing rate estimation unit configured to estimate a wearing rate of the second electrode in one spark discharge based on the information.
A spark plug electrode wearing rate estimating method for a spark plug in which spark discharge occurs between two electrodes by application of voltage generated by an ignition coil, the method comprising the steps of:
- providing two electrodes, at least one of which is a first electrode that contains any one of Ir, Ru, W, and Ni as a main component, and
- estimating a wearing rate of the first electrode in one spark discharge, based on a temperature of the first electrode, and a spark discharge voltage and supply energy from the ignition coil.
A spark plug electrode wearing rate estimating method for a spark plug in which spark discharge occurs between two electrodes by application of voltage generated by an ignition coil, the method comprising the steps of:
- providing two electrodes, at least one of which is a second electrode that contains Pt as a main component, and
- estimating a wearing rate of the second electrode in one spark discharge based on a spark discharge voltage and supply energy from the ignition coil.
Dependencies are inferred from the claim text.