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:
Oct. 29, 1991
Filed:
Aug. 10, 1990
Mazda Motor Corporation, , JP;
Abstract
An intake system having first, second and third intake ports connected to first, second and third air intake passages, respectively and up stream ends of three air intake passages are connected to a common air intake passage. The first air intake passage is set to supply air through the first intake port along an inner peripheral surface of the combustion chamber. The second and third air intake passages are set so that axial center lines thereof may intersect an axial center line of the first air intake passage and an intersecting point of the axial center lines of the third and first air intake passages are up stream of the intersection of the axial center lines of the second and first air intake passages. Thus, swirl of intake air in the combustion chamber from the third intake port is stronger than that generated by the intake air from the second intake port. Then, swirl around an ignition plug arranged almost in the center of the combustion chamber is strengthened. In addition, turbulent flow of intake air is generated by using the difference of velocities between the outside swirl and the swirl around the spark plug, resulting in improved combustability. In addition, cooling loss of the cylinder is prevented by relatively reducing the swirl around the outer periphery of the combustion chamber.