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Method of operating a turbocharged automotive system

A technology for turbochargers and automobiles, applied in electrical control, combustion engines, machines/engines, etc., can solve problems such as adverse effects of power consumption, and achieve the effects of improving fuel consumption, reducing starting, and high and low end torque values

Inactive Publication Date: 2017-02-22
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, each start-up of the motor-compressor has a detrimental effect on power consumption and each start-up of the motor-compressor must be planned accordingly

Method used

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  • Method of operating a turbocharged automotive system
  • Method of operating a turbocharged automotive system
  • Method of operating a turbocharged automotive system

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Embodiment Construction

[0043] Exemplary embodiments are described with reference to the figures, rather than limiting application and use.

[0044] Some embodiments may include automotive systems 100 such as figure 1 and 2 As shown, it includes an internal combustion engine (ICE) 110 having an engine block 120 defining at least one cylinder 125 having a piston 140 coupled to rotate a crankshaft 145 . Cylinder head 130 cooperates with piston 140 to define combustion chamber 150 . A fuel and air mixture (not shown) is disposed in combustion chamber 150 and ignited, the resulting thermally expanding exhaust causes reciprocating motion of piston 140 . Fuel is provided through at least one fuel injector 160 and air is provided through at least one inlet port 210 . Fuel injector 160 is supplied fuel at high pressure from fuel rail 170 in fluid communication with high pressure fuel pump 180 which increases the pressure of fuel received from fuel source 190 . Each of the cylinders 125 has at least two v...

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Abstract

A method of operating an automotive system having an internal combustion engine equipped with an electric compressor and a turbocharger having a turbocharger compressor is disclosed. A surge threshold line and a pre-surge threshold line in a turbocharger compressor map are defined as a function of a turbocharger compressor pressure ratio and mass flow rate. The pre-surge threshold line is defined in terms of greater mass flow values for each corresponding pressure ratio value of the surge threshold line. The position of a turbocharger compressor working point in the turbocharger compressor map is monitored as a function of the turbocharger compressor pressure ratio and mass flow rate. When an increased torque request is detected, the electric compressor is activated to assist the turbocharger compressor in delivering the requested torque when the turbocharger compressor working point crosses the pre-surge threshold line in a direction towards the surge threshold line.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to United Kingdom Patent Application No. GB1514122.9 filed 11 August 2015, which application is hereby incorporated by reference in its entirety. technical field [0003] The invention relates to a method of operating an automotive system comprising an internal combustion engine equipped with a turbocharger and an electric compressor. Background technique [0004] Internal combustion engines are provided with forced air systems, such as turbochargers, to increase engine efficiency and power by forcing additional air into the combustion chambers of the cylinders. A turbocharger includes a compressor rotationally coupled to a turbine. A variable geometry turbine (VGT) is commonly used, ie a turbine equipped with a VGT actuator arranged to move the blade holders in different positions to vary the flow of exhaust gas through the turbine. When the blades are closed, the turbine tends to sp...

Claims

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Application Information

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IPC IPC(8): F02B37/14F02B37/04
CPCF02B37/04F02B37/14F02B39/10F02B2037/125F02D41/0007F02D41/10F02D2200/602F02D2250/18Y02T10/12F02B37/004F02B37/12F02D23/00
Inventor A.拉卡
Owner GM GLOBAL TECH OPERATIONS LLC
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