公开(公告)号：US20210239016A1

公开(公告)日：2021-08-05

申请号：US17157420

申请日：2021-01-25

Applicant: Tula Technology, Inc.

Inventor： Paul R. Van Heyningen

IPC: F01L1/18 ,  F01L1/46

Abstract: A compact switchable roller finger follower having an inner arm and outer arm for a Type II valve train is described. The compact switchable roller finger follower has its widest portion at a mid-arm position. One or more torsion springs provide a restoring force to urge the inner arm into a nested position in the upper arm in which position the inner arm may be locked to the outer arm so that a cam lobe profile is transferred into valve motion. At least one of the torsion springs is located at a mid-arm position.

公开(公告)号：US20210189921A1

公开(公告)日：2021-06-24

申请号：US17119313

申请日：2020-12-11

Applicant: Tula Technology, Inc.

Inventor： Paul R. Van Heyningen

IPC: F01L13/00 ,  F02B75/20 ,  F01L1/24 ,  F01L1/18 ,  F01L1/047 ,  F01L1/46 ,  F02D41/00

Abstract: A control valve for a valve train in an internal combustion engine using four-way control logic for dynamic skip fire control of a pair of cylinders is described. A four cylinder engine can be controlled using two control valves, with each control valve controlling a pair of cylinders. Each control valve has four ports: one control port for each cylinder, a pressure inlet port, and a tank port. The control valve is used to activate or deactivate a cylinder's intake and/or exhaust valves.