Device and method for regulating a compressor for an internal combustion engine

Patent metadata

Field	Value
Publication number	US-10781744-B2
Application number	US-201916260799-A
Country	US
Kind code	B2
Filing date	Jan 29, 2019
Priority date	Jan 30, 2018
Publication date	Sep 22, 2020
Grant date	Sep 22, 2020

Abstract

A device and method for regulating a compressor for an internal combustion engine. At least one actual variable is detected that characterizes a property of an air column, which is situated at an outlet of the compressor in an induction tract of an internal combustion engine, the actual variable being compared in a comparison with a comparison value, the comparison value characterizing a limit for the property of the air column, a setpoint variable being determined as a function of the result of the comparison in order to shift the actual variable in the direction or opposite direction of the comparison value, and an actuator for influencing the actual variable being operated as a function of the setpoint variable.

First claim

What is claimed is:

1. A method for regulating a compressor for an internal combustion engine, comprising:
detecting at least one actual variable which describes a property of an air column situated on an outlet of the compressor in an induction tract of the internal combustion engine;
comparing the actual variable with a comparison value, the comparison value describing a limit for an oscillation of the actual variable;
determining a setpoint variable as a function of a result of the comparison to shift the actual variable in the direction or opposite direction of the comparison value;
operating an actuator for influencing the actual variable as a function of the setpoint variable;
wherein the actuator is a bypass valve, which is operated as a function of the setpoint variable, a setpoint valve cross section of the bypass valve being increased as a function of the setpoint variable when the actual variable exceeds the comparison value by a first specified value, and the setpoint valve cross section of the bypass valve being decreased as a function of the setpoint variable when the actual variable falls below the comparison value by a second specified value.

2. The method as recited in claim 1 , wherein the actual variable describes a supercharging pressure, or an air mass flow, or a rotational speed of the compressor, or a structure-borne noise in or on the compressor, or a structure-borne noise in or on the induction tract, or a current consumption of an electric machine coupled to the compressor, or current fluctuations of the electric machine coupled to the compressor.

3. The method as recited in claim 2 , wherein (i) the actual variable describes the supercharging pressure, and the comparison value is a setpoint value for an oscillation of the supercharging pressure in a range from 5 to 50 Hz, or (ii) the actual variable describes the air mass flow, and the comparison value is a setpoint value for an oscillation of the air mass flow in a range from 5 to 50 Hz.

4. The method as recited in claim 2 , wherein the actual variable describes the structure-borne noise in or on the compressor or the structure-borne noise in or on the induction tract, and the comparison value is a setpoint value for a sound level of the structure-borne noise.

5. The method as recited in claim 4 , wherein the structure-borne noise is detected using a microphone or using a pressure sensor.

6. The method as recited in claim 2 , wherein the actual variable describes the rotational speed of the compressor, and the comparison value is a setpoint value for an oscillation in a range from 5 to 50 Hz or less.

7. The method as recited in claim 2 , wherein the actual variable describes the current consumption of the electric machine coupled to the compressor or the current fluctuations in a range from 5 to 50 Hz of the electric machine coupled to the compressor, wherein the electric machine is an electric machine of an electrically assisted exhaust-gas turbocharger and the comparison value is a limit value for the current consumption or current fluctuations in a range from 5 to 50 Hz.

8. The method as recited in claim 1 , wherein a first setpoint variable is determined as a function of a characteristics map, which assigns setpoint variables to a pressure ratio between an inlet of the compressor and an outlet and a throughput variable of the compressor, the actual variable being determined, which sets in for the first setpoint variable, a second setpoint variable being determined as a function of the result of the comparison, until the actual variable reaches the comparison value or a specified range around the comparison value.

9. The method as recited in claim 8 , wherein when the actual variable with respect to the second setpoint variable reaches the comparison value or a specified range around the comparison value at least temporarily, the second setpoint variable being stored in the characteristics map together with the pressure ratio between the inlet of the compressor and the outlet of the compressor, a prevailing intake-air temperature and a prevailing pressure at the inlet of the compressor.

10. A method for regulating a compressor for an internal combustion engine, the method comprising:
detecting at least one actual variable which describes a property of an air column situated on an outlet of the compressor in an induction tract of the internal combustion engine;
comparing the actual variable with a comparison value, the comparison value describing a limit for an oscillation of the actual variable;
determining a setpoint variable as a function of a result of the comparison to shift the actual variable in the direction or opposite direction of the comparison value;
operating an actuator for influencing the actual variable as a function of the setpoint variable;
wherein the actuator is an electric machine of the compressor, which is operated as a function of the setpoint variable, a setpoint rotational speed of the compressor being reduced as a function of the setpoint variable when the actual variable exceeds the comparison value by a first specified value, and the setpoint rotational speed of the compressor being increased as a function of the setpoint variable when the actual variable falls below the comparison value by a second specified value.

11. A method for regulating a compressor for an internal combustion engine, the method comprising:
detecting at least one actual variable which describes a property of an air column situated on an outlet of the compressor in an induction tract of the internal combustion engine;
comparing the actual variable with a comparison value, the comparison value describing a limit for an oscillation of the actual variable;
determining a setpoint variable as a function of a result of the comparison to shift the actual variable in the direction or opposite direction of the comparison value;
operating an actuator for influencing the actual variable as a function of the setpoint variable;
wherein a torque, by which the compressor is driven, is throttled electromotively or braked in generator mode during a discharge cycle of the internal combustion engine, or when a reduction of a setpoint torque of the internal combustion engine or a load drop or a reduction of a driver input exceeds a threshold value.

12. A device for regulating a compressor for an internal combustion engine, the device comprising:
a processor;
a memory;
an input for information about at least one actual variable; and
an output for controlling an actuator of the internal combustion engine using a setpoint variable, instructions being stored in the memory, the execution of which on the part of the processor causes the processor to perform:
detecting the at least one actual variable which describes a property of an air column situated on an outlet of the compressor in an induction tract of the internal combustion engine;
comparing the actual variable with a comparison value, the comparison value describing a limit for an oscillation of the actual variable;
determining the setpoint variable as a function of a result of the comparison to shift the actual variable in the direction or opposite direction of the comparison value;
operating the actuator for influencing the actual variable as a function of the setpoint variable;
wherein the actuator is a bypass valve, which is operated as a function of the setpoint variable, a setpoint valve cross section of the bypass valve being increased as a function of the setpoint variable when the actual variable exceeds the comparison value by a first specified value, and the setpoint valve cross section of the bypass valve being decreased as a function of t

Assignees

• Bosch Gmbh Robert

Inventors

• Nau Michael
• Baeuerle Michael

Classifications

• F02B37/12 Primary

  Control of the pumps · CPC title

• Y02T10/12

  Improving ICE efficiencies · CPC title

• F02D2200/025

  Engine noise, e.g. determined by using an acoustic sensor · CPC title

• F02B39/10

  electric · CPC title

• F02D2200/0406

  Intake manifold pressure · CPC title