JPS6231732U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is an overall system diagram showing an embodiment of the present invention.
Fig. 2 is a flowchart showing the control procedure for the nozzle vane in Fig. 1, Fig. 3 is a diagram showing the relationship between engine speed and torque in the engine shown in Fig. 1, and Fig. 4 is a flowchart showing the control procedure for the nozzle vane in Fig. 3. A diagram showing the relationship between the opening degrees, Figure 5 is a flowchart showing control of transient performance during gear shifting of the engine in Figure 1, and Figure 6 is a diagram showing the boost pressure and fuel injection in the transient operating state of Figure 5. Diagram showing the relationship with quantity,
FIG. 7 is a diagram showing fluctuations in the exhaust gas turbocharger rotation speed and boost pressure in the transient operating state of FIG. 5. 1...Rotation speed sensor, 2...Load sensor, 3...
Accelerator pedal, 4... Controller, 5... Vane drive ring, 6... Nozzle vane, 7... Rotation axis,
8... Slider, 9... Arm, 10... Step motor, 11... Worm, 12... Potentiometer.

Amendment October 29, 1980 The scope of claims for utility model registration is amended as follows.

[Scope of Claim for Utility Model Registration] In a control device for an exhaust gas turbocharged engine that controls the nozzle vane opening of an exhaust gas turbocharger through a controller and an actuator by inputting the engine rotation speed and load, A potentiometer that detects the nozzle vane opening, a low gear sensor that detects a relatively low speed gear shift, a set nozzle vane opening area determined by mapping depending on the engine operating condition, and a detected nozzle vane opening detected by the potentiometer. Compare the deviation from the area with its tolerance deviation,
When the above deviation is below the above tolerance deviation, the above nozzle vane opening degree is maintained as it is, and when the above deviation is above the above tolerance deviation, the above detected nozzle vane opening area is equal to or greater than the above set nozzle vane opening area.
If so, the nozzle vane is controlled in the closing direction, and if the detected nozzle vane opening area is less than or equal to the set nozzle vane opening area, the nozzle vane is controlled in the opening direction, and when the output of the gear position sensor is input, the nozzle vane is A control device for an exhaust gas turbocharged engine, comprising: a controller for controlling the opening to a minimum opening degree.

Claims (1)

[Scope of utility model registration request] In a control device for an exhaust gas turbocharged engine that inputs the engine speed and load and controls the nozzle vane opening of the exhaust gas turbocharger via a controller and an actuator, a potentiometer that detects the nozzle vane opening is used. The allowable deviation is the deviation between the set nozzle vane opening area determined by the meter, a low gear sensor that detects a relatively low gear shift, and mapping according to the engine operating condition and the detected nozzle vane opening area detected by the potentiometer. compared to
When the above deviation is below the above tolerance deviation, the above nozzle vane opening degree is maintained as is, and when the above deviation is above the above tolerance deviation, the above detection nozzle vane opening area is below the set nozzle vane opening area. The nozzle vane is controlled in the closing direction, and if the detected nozzle vane opening area is equal to or greater than the set nozzle vane opening area, the nozzle vane is controlled in the opening direction, and when the output of the gear position sensor is input, the nozzle vane is set to the minimum opening. A control device for an exhaust gas turbocharged engine, comprising a controller for controlling the exhaust gas turbocharged engine.