Engine comprising a continuous braking device, particularly for

Details Engine comprising a continuous braking device, particularly for Engine comprising a continuous braking device, particularly for

1992-11-06

1994-08-09

Wolfe, Willis R.

Internal-combustion engines

Engine speed regulator

Responsive to deceleration mode

F02D 1304

Patent

active

053356365

ABSTRACT:
Endothermic engine for an industrial vehicle includes a continuous braking device capable of actuating a supplementary opening of the exhaust valves
so as to dissipate the compression energy produced inside the cylinders, in which the profile of the exhaust valves control cams consists of a first section with null lift, corresponding to one stage of the suction stroke of the relevant cylinders, a second section with a constant reduced lift, corresponding to the last stage of the suction stroke and to both compression and power stroke of the relevant cylinders, and a third lobe section corresponding to the exhaust stroke of the respective cylinder. The continuous braking device includes an actuator
capable of displacing rotation axis of control rocker arms of exhaust valves from a first normal work position, in correspondence to which valve clearance is large enough to cause second section
of the cams profile to be ineffective, and a second braking position, in correspondence of which the value of valve clearance is reduced in such a way, as to activate the second section.

REFERENCES:
patent: 3367312 (1968-02-01), Jonsson
patent: 3547087 (1970-12-01), Siegler
patent: 3572300 (1971-03-01), Stager et al.
patent: 3786792 (1974-01-01), Pelizzoni et al.
patent: 4440126 (1984-04-01), Abermeth et al.
patent: 4836162 (1989-06-01), Melde-Tuczai et al.
patent: 4909035 (1990-03-01), Tadokoro et al.
patent: 4932372 (1990-06-01), Meneely
patent: 5146890 (1992-09-01), Gobert et al.

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