US 5,960,631 A · Supercharging pressure control device

Abstract

According to the supercharging pressure control device of the present invention, a supercharging pressure of a supercharged engine for an aircraft is controlled by adjusting an opening of a waste gate valve (WGV) of an exhaust gas turbocharger. The control device controls the opening of the WGV to the opening given as a sum of a feed forward amount determined from an atmospheric pressure and an engine speed, and a feedback amount set based on a deviation between a target supercharging pressure and an actual supercharging pressure detected by a sensor. Further, the control device corrects the feed forward amount in accordance with the deviation amount of the atmospheric temperature and an intake air pressure loss from the values in the standard condition and makes the range of fluctuation of the feedback amount smaller. By this, the lowering of a response of the supercharging pressure control due to an increase of the amount of the correction of the degree of opening of the WGV by the feedback amount caused by the deviation of the operating condition from the standard condition is prevented.

Claims12

Dependent claims

A supercharging pressure control device for a supercharger which raises a pressure of air and supplies the air to a device to be supercharged, said supercharging pressure control device comprising:

supercharger operating condition detecting means for intermittently detecting operating condition parameters of a supercharger during operation including at least an atmospheric pressure and an atmospheric temperature;
and
supercharging pressure controlling means for setting the supercharging pressure control amount based on the detected operating condition parameters and a predetermined target supercharging pressure;
control amount correcting means for correcting the supercharging pressure control amount set by said supercharging pressure controlling means based on the detected atmospheric pressure and atmospheric temperature;
and
supercharging pressure adjusting means for changing the supercharging pressure of the supercharger in accordance with the supercharging pressure control amount after the correction.

3 more elements

A supercharging pressure control device for a supercharger which raises a pressure of air and supplies the air to a device to be supercharged, said supercharging pressure control device comprising:

a supercharger operating condition detecting circuit that intermittently detects operating condition parameters of a supercharger during operation including at least an atmospheric pressure and an atmospheric temperature;
a supercharging pressure controlling circuit that sets the supercharging pressure control amount based on the detected operating condition parameters and a predetermined target supercharging pressure;
a control amount correcting circuit that corrects the supercharging pressure control amount set by the supercharging pressure controlling circuit based on the detected atmospheric pressure and atmospheric temperature;
and
a supercharging pressure adjusting circuit that changes the supercharging pressure of the supercharger in accordance with the supercharging pressure control amount after the correction.

2 more elements

Dependencies are inferred from the claim text.

Supercharging pressure control device

Life of this patent

Supercharging pressure control device

Life of this patent

Abstract

Claims12