Title:
【発明の名称】内燃機関のノッキングを識別する方法と装置
Document Type and Number:
Japanese Patent JPH07505940
Kind Code:
A
Abstract:
PCT No. PCT/DE93/00254 Sec. 371 Date Aug. 4, 1994 Sec. 102(e) Date Aug. 4, 1994 PCT Filed Mar. 20, 1993 PCT Pub. No. WO93/20424 PCT Pub. Date Oct. 14, 1993.The method of detecting knocking of an internal combustion engine includes generating a sensor signal with a knock sensor provided with the internal combustion engine; digitizing the knock sensor signal to form a digitized signal; high-pass filtering the resulting digitized signal to form a high-frequency signal; counting amplitudes of oscillations the high-frequency signal which are greater than a first threshold value (P1) to form an amplitude count; integrating an absolute value of the high-frequency signal to obtain an integrated signal; comparing the integrated signal to a second threshold value (P2); and generating an output signal indicating that knocking is occurring when the amplitude count is at least one and when the integrated signal is greater than the second threshold value (P2).
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Inventors:
Philip, Matthias
Application Number:
JP51696093A
Publication Date:
June 29, 1995
Filing Date:
March 20, 1993
Export Citation:
Assignee:
ROBERT BOSCH GMBH
International Classes:
F02D45/00; F02P5/152; F02P5/153; G01L23/22; (IPC1-7): F02D45/00; F02P5/152; F02P5/153; G01L23/22
Attorney, Agent or Firm:
Toshio Yano (3 outside)