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:
Mar. 26, 2013
Filed:
Nov. 11, 2008
Takao Kawabe, Osaka, JP;
Takashi Miyamoto, Osaka, JP;
Terumitsu Takahata, Osaka, JP;
Tetsuo Sakaki, Kanagawa, JP;
Isamu Kawashima, Kanagawa, JP;
Takao Kawabe, Osaka, JP;
Takashi Miyamoto, Osaka, JP;
Terumitsu Takahata, Osaka, JP;
Tetsuo Sakaki, Kanagawa, JP;
Isamu Kawashima, Kanagawa, JP;
Yanmar Co., Ltd., Osaka, JP;
Abstract
It is an object to provide an engine that makes it possible to constantly detect the number of rotations of a supercharger with a calculation load of an ECU reduced. An engineis provided with an engine basecomprised of a plurality of cylinders and a turbocharger, a crank angle sensor, a turbo sensorthat detects rotations of the turbochargeras pulses, an amplifierthat divides the pulses by an arbitrary division ratio and calculates the divided pulses, and an ECUthat judges a surge condition of the turbocharger, wherein the ECUsets a predetermined position of a piston of each cylinder in a crank angle of the engine baseto count start timing of the divided pulses, outputs the divided pulses counted from the count start timing to the number of predetermined rotations as a first output, and judges that, if a difference between the first outputs at every cylinder is more than a predetermined value, the turbochargeris in the surge condition.