US 12,012,875 B2
Variable valve device
Hisashi Ozeki, Hamamatsu (JP)
Assigned to SUZUKI MOTOR CORPORATION, Hamamatsu (JP)
Filed by SUZUKI MOTOR CORPORATION, Hamamatsu (JP)
Filed on Mar. 30, 2023, as Appl. No. 18/193,181.
Claims priority of application No. 2022-063378 (JP), filed on Apr. 6, 2022.
Prior Publication US 2023/0323798 A1, Oct. 12, 2023
Int. Cl. F01L 1/344 (2006.01)
CPC F01L 1/344 (2013.01) 9 Claims
OG exemplary drawing
 
1. A variable valve device provided in a cylinder head and capable of changing a valve lift amount, comprising:
a camshaft on which a plurality of cams with different valve lift amounts are formed;
a switching mechanism configured to switch a cam for moving a valve among the plurality of cams; and
an oil control valve configured to control an oil pressure for the switching mechanism; and
an oil groove is formed in a part of an outer circumferential surface of the camshaft such that oil starts to be supplied from the oil control valve to the switching mechanism at an end timing of a valve lift or in a zero range in which no valve lift occurs.