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Method of controlling the pressure of turbocharger

A technology of turbocharger and boost pressure, applied in electrical control, engine control, mechanical equipment, etc., can solve problems such as increased boost pressure

Inactive Publication Date: 2015-04-29
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the wastegate will close tighter and thus boost pressure will increase

Method used

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  • Method of controlling the pressure of turbocharger
  • Method of controlling the pressure of turbocharger
  • Method of controlling the pressure of turbocharger

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Experimental program
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Embodiment Construction

[0046] Some embodiments may include such as figure 1 and 2 The illustrated automotive system 100 includes an internal combustion engine (ICE) 110 having an engine block 120 defining at least one cylinder 125 having a piston 140 for rotating a crankshaft 145 . Cylinder head 130 cooperates with piston 140 to define combustion chamber 150 .

[0047] A fuel and air mixture (not shown) is input into combustion chamber 150 and ignited, the resulting hot expanding exhaust gases causing reciprocating motion of piston 140 . Fuel is provided through at least one fuel injector 160 and air is provided through at least one air intake 210 . Fuel is supplied to fuel injector 160 at high pressure from fuel rail 170 which is in fluid communication with high pressure fuel pump 180 to increase the pressure of fuel from fuel source 190 .

[0048] Each cylinder 125 has at least two valves 215 driven by a camshaft 135 that rotates simultaneously with the crankshaft 145 . Valve 215 selectively a...

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PUM

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Abstract

A method and apparatus for controlling a boost pressure of a turbocharger is provided. The turbocharger includes a waste gate valve and a waste gate actuator. When the internal combustion engine operates under cold temperature conditions, a steady state temperature of the waste gate actuator is determined and a corrected temperature of the waste gate actuator is estimated as a function of the thermal convection between ambient air and the waste gate actuator. A corrected value of the duty cycle of a pulse width modulated signal is estimated as a function of said corrected temperature and the duty cycle corrected value is used to control the boost pressure of the turbocharger.

Description

technical field [0001] The present invention relates to a method and apparatus for controlling the boost pressure of a turbocharger, especially a turbocharger having a vacuum or boost pressure actuated wastegate valve. The method and device are suitable for use in internal combustion engines, and in particular can use vacuum drives or boost pressure actuators, which are controlled by electropneumatic valves (or vacuum control valves, which can also be abbreviated as EPV), which are used in turbocharged gasoline engines and diesel engine. Background technique [0002] It is known that most internal combustion engines are turbocharged. A turbocharger is a supercharging device used to allow more power to be produced for a given size internal combustion engine. An advantage of a turbine is that it compresses a greater mass of intake air into the combustion chamber, thus resulting in an increase in energy and / or efficiency. Turbochargers are commonly used in internal combustio...

Claims

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Application Information

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IPC IPC(8): F02B37/12
CPCF02B37/16F02B37/186F02D41/0007F02D2041/2027F02D2041/2065Y02T10/12
Inventor N.卡拉希克N.奥思
Owner GM GLOBAL TECH OPERATIONS LLC