US 6,283,093 B1 · Method and apparatus for determining the ignition angle for an internal combustion engine with adaptive knocking

Abstract

A method for determining the ignition angle for an internal combustion engine with adaptive knocking control, in which the occurrence of knocking is reduced by a controlled adjustment of the ignition angle in the retarded direction. The current values for the adjustment in the retarded direction are stored in a characteristic diagram in an operating parameter-dependent fashion. An average adjustment in the retarded direction is determined from these characteristic diagram values, and both a correction ignition angle and a control range limitation for the knocking control are determined therefrom. The fuel quality and ambient influences are automatically sensed with reference to a learned RON level and are also used to reduce the amount of energy expended to control engine knocking.

Claims12

Dependent claims

An apparatus for determining the ignition angle for an internal combustion engine with adaptive knocking control, comprising:

a non-volatile memory for storing a characteristic diagram and generating a learnt RON level;
a first device operatively coupled to the non-volatile memory for receiving a starting value of a RON level and the learnt RON level;
a second device operatively coupled to the non-volatile memory and the first device for determining a maximum control range;
a third device operatively coupled to the second device for continuously comparing the maximum control range with a control range;
a fourth device operatively coupled to the first device for determining a basic retarded-direction adjustment;
a fifth device operatively coupled to the fourth device for multiplying a correction factor by the basic retarded-direction adjustment;
and
a sixth device operatively coupled to the fifth device for determining the correction factor.

5 more elements

Dependencies are inferred from the claim text.

Method and apparatus for determining the ignition angle for an internal combustion engine with adaptive knocking

Life of this patent

Method and apparatus for determining the ignition angle for an internal combustion engine with adaptive knocking

Life of this patent

Abstract

Claims12