The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 29, 2008
Filed:
Jul. 11, 2006
Jun Maemura, Aichi-ken, JP;
Masanao Idogawa, Toyota, JP;
Masahiko Teraoka, Toyota, JP;
Osamu Hosokawa, Toyota, JP;
Takeyasu Muraishi, Hamamatsu, JP;
Jun Maemura, Aichi-ken, JP;
Masanao Idogawa, Toyota, JP;
Masahiko Teraoka, Toyota, JP;
Osamu Hosokawa, Toyota, JP;
Takeyasu Muraishi, Hamamatsu, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Yamaha Hatsudoki Kabushiki Kaisha, Iwata-shi, JP;
Abstract
A requested injection amount of fuel necessary during ignition cut-off at the time of start at an extremely low temperature is calculated (step ST), injection start timing and injection end timing between which wetting of a spark plug by fuel is less likely are set (step ST), and the number of times of ignition cut-off is calculated based on the injection start timing and the injection end timing and the requested injection amount (step ST). The injection start timing and the injection end timing are thus restricted to timings between which plug wetting is less likely, and the number of times of ignition cut-off is calculated based on the injection start timing and the injection end timing and the requested injection amount, so that wetting of the spark plug by fuel at the extremely low temperature can be avoided even in an in-cylinder direct-injection engine.