Dual lift actuation means

Details Dual lift actuation means Dual lift actuation means

1997-02-20

1997-12-16

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9041, 123198F, F01L 1300

Patent

active

056973330

ABSTRACT:
A valve control system for an internal combustion engine including a poppet valve (21) and high lift (15) and low lilt (31) cam lobes. A latchable rocker arm includes an outer rocker arm (33) and an inner rocker arm (35), and a slider mechanism (37) which is biased by a spring (67) to the high lilt mode (FIG. 1). An actuator assembly (27) includes and arm (103) biased by a spring (101) into engagement with the slider (37), biasing the slider toward the unlatched (low lift) mode (FIG. 2 ). The actuator (27) includes an electromagnetic coil (83) which moves an armature (87) into engagement with the arm (103), biasing the arm in opposition to the force of the actuator spring (101), but aided initially by the force of the slider spring (67).

REFERENCES:
patent: 5524580 (1996-06-01), Muir
patent: 5529033 (1996-06-01), Hampton
patent: 5584267 (1996-12-01), Muir
patent: 5619958 (1997-04-01), Hampton et al.
patent: 5623897 (1997-04-01), Hampton et al.

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