Patent ID: 9109569
Filing Date: 2015-08-18
Classification: F02B,F02D,F02P,Y02T

Abstract:
1. A method for operating a working apparatus that includes an internal combustion engine which drives at least one tool via a clutch, wherein the clutch begins a clutch engagement process at an initial engagement speed when the internal combustion engine is accelerated, wherein the internal combustion engine includes a piston, an ignition device and an ignition control device controlling ignition timing to provide a first ignition timing for idling and a second ignition timing for full load operation, wherein the second ignition timing is earlier than the first ignition timing, wherein the method comprises operating the apparatus in a manner that results in a relatively sudden deceleration of the engine, and, in response to said sudden deceleration of the engine, adjusting ignition timing toward “late,” with respect to the first ignition timing, when the engine speed drops to a level in a first speed range above the idling speed and below the initial clutch engagement speed.