| 摘要 |
<p>The invention concerns a method for controlling a valve lift device, associated with an internal combustion engine. Said method is characterised in that it consists in: (a) determining the angular offset reference value α0 when the valve lift device is inactivated, each time the engine moves into stabilised idle speed and taking it into account for subsequent angular offset control; and it further consists of at least one of the following steps: (b) prior test stand mapping on an opening cycle ratio (RCO) of a hydraulic valve controlled valve lift device PID based on the engine water temperature, and adjusting the angular offset to be applied (by modifying the reference value α0 according to said water temperature; (c) determining the difference between the applied (RCO) control and the control computed at step (b) by observing term I of the valve lift control PID and by storing its value in an adaptive term; (d) determining the valve lift response time following a predetermined control level and on the basis of said response time, modifying the proportional term P of the PID; (e) verifying that the angular offset between the camshaft and the crankshaft does not oscillate when the set value is stable, and consequently modifying the term P of the PID to prevent said oscillation.</p> |
