US 9,810,165 B2
Internal combustion engine
Masato Ikemoto, Susono (JP); Masayoshi Nakagawa, Mishima (JP); Takashi Matsumoto, Gotenba (JP); and Yoshio Yamashita, Susono (JP)
Assigned to Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken (JP)
Appl. No. 14/761,706
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, Aichi-ken (JP)
PCT Filed Jan. 15, 2014, PCT No. PCT/JP2014/050604
§ 371(c)(1), (2) Date Jul. 17, 2015,
PCT Pub. No. WO2014/112538, PCT Pub. Date Jul. 24, 2014.
Claims priority of application No. 2013-008208 (JP), filed on Jan. 21, 2013.
Prior Publication US 2015/0354475 A1, Dec. 10, 2015
Int. Cl. F02D 35/02 (2006.01); F02D 35/00 (2006.01); F01P 7/14 (2006.01); G01N 25/66 (2006.01); F02M 53/04 (2006.01); F02D 41/04 (2006.01)
CPC F02D 35/025 (2013.01) [F01P 7/14 (2013.01); F02D 35/0007 (2013.01); F02M 53/04 (2013.01); G01N 25/66 (2013.01); F02D 41/042 (2013.01); F02M 2200/05 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method of operating an internal combustion engine, the method comprising:
determining, via one or more sensors, a rotation speed, an injection timing, an injection amount, a water temperature, and a fuel temperature of the internal combustion engine;
determining a nozzle heat receiving amount of an injector and a nozzle tip temperature of the injector, based on the rotation speed, the injection timing, the injection amount, the water temperature, and the fuel temperature of the internal combustion engine, at a point in time when ignition is turned off; and
determining the occurrence or non-occurrence of dew condensation in a tip portion of a nozzle based on the nozzle heat receiving amount and the nozzle tip temperature of the injector at the point in time when ignition is turned off.