| 摘要 |
A system for controlling the boost pressure in a turbo-charged internal combustion engine. The system comprises a control device (171); an operating device (11, 12, 13) controlled by the control device and operative in controlling the speed of a turbine (4) and means (22) for feeding to the control device (171) signals which represent the true boost-pressure prevailing at a location upstream of the engine throttle valve (9). The control device includes a data processor (18, 21) in which there is stored data which relates to theoretic control-valve settings and values which, optionally subsequent to calculation, are intended to give boost-pressure control values as a function of engine speed. The control device is constructed to compare the true boost-pressure with the given control value subsequent to an increase in load with a subsequent rise in pressure over an interval of time. The data processor (18, 21) is programmed, in accordance with the character of a change in the difference between the true value and the control value, to calculate this data control-setting correction data for regulating the control valve (13), and to write this data into a first memory (20, 21) so that upon the occurence of subsequent increases in load with subsequent rises in pressure, a lower overshoot is obtained when adjusting to the control pressure when the character of the change includes the occurence of an overshoot, or a shorter adjustment time is obtained when the change character includes the occurence of an excessively long adjustment time. |
