초록 ▼

A system for controlling the boost pressure in a turbocharged internal combustion engine comprising 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)

A system for controlling the boost pressure in a turbocharged internal combustion engine comprising 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 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).

대표청구항 ▼

A system for controlling the boost pressure in a turbocharged internal combustion engine having an engine throttle valve, comprising: a control device (171); an operating device (11, 12, 13) connected to and controlled by said control device and so disposed as to control the speed of turbine (4) and

A system for controlling the boost pressure in a turbocharged internal combustion engine having an engine throttle valve, comprising: a control device (171); an operating device (11, 12, 13) connected to and controlled by said control device and so disposed as to control the speed of turbine (4) and a compressor (6) coupled thereto; and means (22) connected to the control device for feeding to the control device (171) signals which represent actual boost pressure at a location upstream of the engine throttle valve (9), said control device comprising a data processor (18-21) having stored therein data relating to predetermined operating device settings and values representative of boost-pressure control values as a function of engine speed; said control device having means for detecting engine load and being adapted to compare the actual boost-pressure with a given control value subsequent to an increase in engine load with a subsequent rise in pressure over an interval of time; and said data processor (18-21) being programmed to make a calculation in response to changes in a difference between the actual value and the control value and to write into a first memory control-setting correction data for regulating the operating device, said control device controlling said operating device in accordance with the correction data such that upon the occurrence of subsequent increase in engine load with subsequent rises in pressure, a lower pressure overshoot is obtained when adjusting to the control pressure if the change includes the occurrence of an overshoot, and a shorter adjustment time is obtained if the change includes the occurrence of an adjustment time exceeding a predetermined value.