(19)
(11) EP 1 369 572 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
03.05.2006 Bulletin 2006/18

(43) Date of publication A2:
10.12.2003 Bulletin 2003/50

(21) Application number: 03011170.2

(22) Date of filing: 27.05.2003
(51) International Patent Classification (IPC): 
F02D 41/32(2006.01)
 F02B 61/02(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
Designated Extension States:
AL LT LV MK

(30) Priority: 05.06.2002 JP 2002163881

(71) Applicant: MIKUNI CORPORATION
Chiyoda-ku, Tokyo 101-0021 (JP)

(72) Inventor:
  • Yamazaki, Shigeru
    Odawara-shi, Kanagawa 250-0055 (JP)

(74) Representative: Beyer, Andreas 
Wuesthoff & Wuesthoff, Patent- und Rechtsanwälte, Schweigerstrasse 2
81541 München
81541 München (DE)

   


(54) Engine control apparatus


(57) In an air-cooled engine, the temperature of the engine is detected with high accuracy to control fuel injection in optimal conditions. In order to detect the temperature of the engine, a first temperature sensor (21) and second temperature sensor (22) are provided at two spaced portions respectively on a cylinder block (11), and based on the function of a temperature difference between temperatures T1 and T2 respectively detected by the first temperature sensor (21) and second temperature sensor (22) and the thermal resistance specific to the engine, a calculating circuit (34) calculates the engine temperature T0 inside the engine. In this way, the detection (estimation) accuracy of the engine temperature is improved and the optimal engine control is performed.







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