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:
Feb. 17, 2004
Filed:
Oct. 04, 2002
Chitoshi Saito, Shizuoka, JP;
Yamaha Marine Kabushiki Kaisha, Shizuoka, JP;
Abstract
A marine engine has an air intake device that includes an air regulator (e.g., a throttle valve) and fuel injectors. A control system controls an actuator of the air regulator. A first sensor detects an intake pressure in the intake device. A second sensor detects a state of the actuator. A third sensor detects an engine speed of the engine. A control device controls an amount of fuel sprayed by the fuel injectors relative to an amount of the intake air. The control device controls the amount of the fuel based upon a signal of the third sensor and a signal of the first sensor in a first actuation range of the actuator in which the intake pressure is variable. The control device controls the amount of the fuel based upon a signal of the third sensor and a signal of the second sensor in a second actuation range of the actuator in which the intake pressure is invariable.