Method and Apparatus for Model Based Control of Electrical Boosting System

Patent metadata

Field	Value
Publication number	US-2018051638-A1
Application number	US-201615243869-A
Country	US
Kind code	A1
Filing date	Aug 22, 2016
Priority date	Aug 22, 2016
Publication date	Feb 22, 2018
Grant date	—

Abstract

A two-stage air boosting system for an internal combustion engine has a first air boosting system which is one of an electrical air boosting system or a turbocharger air boosting system. The two-stage air boosting system also includes a second air boosting system which is the other one of the electrical air boosting system or the turbocharger air boosting system and is positioned intermediate the first air boosting system and an air intake manifold of the internal combustion engine. A plurality of sensors provides information relating to operation of the two-stage air boosting system including inlet conditions of a compressor of the second air boosting system. A control module is configured to receive a plurality of inputs including the information relating to operation of the two-stage air boosting system, and is further configured to provide a system control command for the two-stage air boosting system responsive to the inputs.

First claim

1 . A two-stage air boosting system for an internal combustion engine, said apparatus comprising:
a first air boosting system comprising one of an electrical air boosting system and a turbocharger air boosting system; a second air boosting system positioned intermediate the first air boosting system and an air intake manifold of the internal combustion engine, the second air boosting system comprising the other of the electrical air boosting system and the turbocharger air boosting system; a plurality of sensors providing information relating to operation of said two-stage air boosting system including inlet conditions of a compressor of the second air boosting system; a control module configured to receive a plurality of inputs including the information relating to operation of the two-stage air boosting system, and configured to provide a system control command for the two-stage air boosting system responsive to said inputs.

2 . The apparatus of claim 1 wherein the plurality of sensors comprise:
at least one sensor positioned upstream of a compressor of the first air boosting system;
at least one sensor positioned downstream of the compressor of the first air boosting system and upstream of the compressor of the second air boosting system; and
at least one sensor positioned downstream of the compressor of the second air boosting system and upstream of the air intake manifold of the internal combustion engine;

3 . The apparatus of claim 1 wherein at least one of the plurality of sensors comprises a virtual sensor configured to estimate an inlet pressure and an inlet temperature of the compressor of the second air boosting system.

4 . The apparatus of claim 1 wherein the electrical air boosting system comprises a compressor, an electric torque machine configured to drive the compressor, and a power source configured to provide electrical power to the electric torque machine.

5 . The apparatus of claim 1 wherein the turbocharger air boosting system comprises a compressor positioned upstream of the internal combustion engine and a turbine positioned downstream of the internal combustion engine and configured to drive the compressor using an exhaust flow of the internal combustion engine.

6 . The apparatus of claim 4 wherein the electrical air boosting system further comprises a bypass valve configured to allow air flowing through the two-stage air boosting system to bypass the compressor of the electrical air boosting system.

7 . The apparatus of claim 5 wherein the turbine of the turbocharger air boosting system is a variable geometry turbine.

8 . The apparatus of claim 1 , wherein the control module is further configured to:
monitor a plurality of operating parameters of the two-stage air boosting system; determine a desired operating target command for one of said operating parameters corresponding to one stage of the two-stage air boosting system; determine an error between the desired operating target command and said one of said monitored operating parameters of the two-stage air boosting system; determine scheduled PID gains based on the determined error utilizing a PID controller; determine a system control command for the two-stage air boosting system based upon the modified scheduled PID gains; and control the two-stage air boosting system based upon the system control command for the air charging system.

9 . Method to control a two-stage air boosting system of an internal combustion engine, the method comprising:
monitoring a plurality of operating parameters of the two-stage air boosting system; determining a desired operating target command for one of said operating parameters corresponding to one stage of the two-stage air boosting system; determining an error between the desired operating target command and said one of said monitored operating parameters of the two-stage air boosting system; determining scheduled PID gains based on the determined error utilizing a PID controller; determining a system control command for the two-stage air boosting system based upon the scheduled PID gains; and controlling the two-stage air boosting system based upon the system control command for the air charging system.

10 . The method of claim 9 wherein determining the desired operating target command comprises:
determining a first desired pressure ratio across a first stage of the two-stage air boosting system and determining a second desired pressure ratio across a second stage of the two-stage air boosting system;
determining the desired operating target command based upon at least one of the first and second desired pressure ratios.

11 . The method of claim 10 wherein determining the first desired pressure ratio across the first stage of the two-stage air boosting system and determining the second desired pressure ratio across the second stage of the two-stage air boosting system comprises a two-stage power split method comprising:
determining the first desired pressure ratio across the first stage of the two-stage air boosting system and determining the second desired pressure ratio across the second stage of the two-stage air boosting system based upon achieving a total desired pressure ratio across both the first stage of the two-stage air boosting system and the second stage of the two-stage air boosting system.

12 . The method of claim 11 wherein the two-stage power split method comprises the following relationship:

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Assignees

• Gm Global Tech Operations Llc

Inventors

• Wang Yue Yun
• Hao Lei
• Brunetti Gianmarco

Classifications

• F02D2041/1409

  using at least a proportional, integral or derivative controller · CPC title

• F02D41/28

  Interface circuits · CPC title

• F02D41/1401

  characterised by the control or regulation method (F02D41/1473, F02D41/1477 take precedence) · CPC title

• F02B37/24

  by using pumps or turbines with adjustable guide vanes · CPC title

• F02B37/04

  Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump · CPC title