lost motion


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lost motion

[′lȯst ′mō·shən]
(mechanical engineering)
The delay between the movement of a driver and the movement of a follower.
References in periodicals archive ?
As a complete fast moving, lubricated system which operates at high temperatures, it is a must for the valvetrain to be tested number of times, especially when thinking of the behavior of the hydraulic lost motion mechanism during engine brake.
In (4), [J.sub.W] represents the weighted target function: W is a weights matrix that is composed from sizes of lost motion vectors.
When selected areas of the socket system are compressed to this degree, most of the lost motion between the limb bone and socket wall is eliminated.
"Lost motion springs, which are compressed by rocker arms in normal engine use, may bend or break over time resulting in abnormal engine noise and potentially causing engine stalling and problems in re-starting," the company said, adding that the replacement will be carried free of cost.
" The defective lost motion springs, which are compressed by rocker arms in normal engine use, may bend or break over time, resulting in abnormal engine noise and potentially causing engine stalling and problems in re- starting," a company statement said.
According to reports, in a statement, HSCI said it would carry out preventive part replacement of the lost motion spring in the valve train of the City sedans being recalled.
The phenomena may be bearing frictions, impacts, shocks within drive mechanisms and drive motors, lost motion inside gears, inaccurate alignments, unbalances, variable pressure determined by combustion processes, variable forces caused by machine's operating error, flow forces of fluids, too high tolerances.
The quality of materials and manufacturing are the best ways to eliminate backlash--the free-play that leads to lost motion.
It might be said that so far the cylinder has only taken up the lost motion or backlash in the system.
The designs eliminate backlash between the screw and the nut and also maximize system stiffness and minimize lost motion. Haydon offers five different nut styles, from freewheeling, non-anti-backlash nuts to a user-adjustable anti-backlash nut.
The papers are organized into sections on engine cycles with variable valve actuation, cam phasing systems, profile switching and lost motion systems, cylinder deactivation, mechanical variable valvetrain systems, and camless valve actuation.
As a result there is minimal friction and lost motion and adjustment is easy; the steering is perfect in feel, weight and speed.