Title:
INTERNAL COMBUSTION ENGINE DEVICE, AND MISFIRE JUDGING METHOD FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2007/129657
Kind Code:
A1
Abstract:
The frequency characteristics of such influences of an output torque calculated
with a dynamic model and outputted from a motor as are applied to the rotational
fluctuations of a crankshaft, and the amplitude (P) and the phase (θ) at
the time of a damping control by the motor are used to calculate (at S110) an influence
component (N30m) based on a 30-degree speed (N30), as the time period needed for
the crankshaft of every 30 degrees to rotate by 30 degrees. An influence component
(T30m) as the inverse of the influence component (N30m) is subtracted from a 30-degree
required time period (T30) thereby to calculate a judging required time period
(T30j) (at S120 and S130). The deciding required time period (T30j) calculated
is compared with a threshold value (Tref) (at S140) to decide a misfire of the engine.
As a result, the misfire of the engine for outputting the power to an after stage
through a damper can be judged more reliably and precisely.
Inventors:
SUZUKI, Takashi (1 Toyota-cho,Toyota-sh, Aichi 71, 4718571, JP)
Application Number:
JP2007/059370
Publication Date:
November 15, 2007
Filing Date:
May 02, 2007
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA (1 Toyota-cho, Toyota-shi Aichi, 71, 4718571, JP)
トヨタ自動車株式会社 (〒71 愛知県豊田市トヨタ町１番地 Aichi, 4718571, JP)
トヨタ自動車株式会社 (〒71 愛知県豊田市トヨタ町１番地 Aichi, 4718571, JP)
International Classes:
F02D45/00; F02D29/02; F02D29/06
Attorney, Agent or Firm:
ITEC INTERNATIONAL PATENT FIRM (Uchisaiwaicho Dai Bldg, 3-3 Uchisaiwai-cho 1-chom, Chiyoda-ku Tokyo, 100-0011, JP)
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