DIAGNOSTIC SYSTEMS AND METHODS FOR ENGINE KNOCK SENSORS
First Claim
Patent Images
1. An engine control system comprising:
- a digital signal processing (DSP) module that generates a fast Fourier transform (FFT) of an engine knock signal generated by an engine knock sensor;
an intensity determination module that determines an engine knock intensity based on one of a maximum of and an average of the FFT; and
a status determination module that determines a status of the engine knock sensor based on the engine knock intensity, a plurality of predetermined knock intensity thresholds, and a rotational speed of an engine crankshaft.
8 Assignments
0 Petitions
Accused Products
Abstract
An engine control system includes a digital signal processing (DSP) module that generates a fast Fourier transform (FFT) of an engine knock signal generated by an engine knock sensor. An intensity determination module determines an engine knock intensity based on one of a maximum of and an average of the FFT. A status determination module determines a status of the engine knock sensor based on the engine knock intensity, a plurality of predetermined knock intensity thresholds, and a rotational speed of an engine crankshaft.
-
Citations
20 Claims
-
1. An engine control system comprising:
-
a digital signal processing (DSP) module that generates a fast Fourier transform (FFT) of an engine knock signal generated by an engine knock sensor; an intensity determination module that determines an engine knock intensity based on one of a maximum of and an average of the FFT; and a status determination module that determines a status of the engine knock sensor based on the engine knock intensity, a plurality of predetermined knock intensity thresholds, and a rotational speed of an engine crankshaft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method comprising:
-
generating a fast Fourier transform (FFT) of an engine knock signal generated by an engine knock sensor; determining an engine knock intensity based on one of a maximum of and an average of the FFT; and determining a status of the engine knock sensor based on the engine knock intensity, a plurality of predetermined knock intensity thresholds, and a rotational speed of an engine crankshaft. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification