Method for optimizing the operation of a charged reciprocating internal combustion engine in the lower engine speed range

An internal combustion engine, piston type technology, applied in low pressure fuel injection, low pressure fuel injection, internal combustion piston engine, etc., can solve problems such as insufficient load bearing characteristics, and achieve the effect of improving the level of air consumption

Inactive Publication Date: 2006-11-15
FEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] It has now been shown that in the low speed range of a piston internal combustion engine and in the resulting low delivery rate of the supercharger (ie of the exhaust gas turbocharger and supercharger), during start-up operation and at low speeds When the load-carrying characteristics are insufficient

Method used

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  • Method for optimizing the operation of a charged reciprocating internal combustion engine in the lower engine speed range
  • Method for optimizing the operation of a charged reciprocating internal combustion engine in the lower engine speed range
  • Method for optimizing the operation of a charged reciprocating internal combustion engine in the lower engine speed range

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Embodiment Construction

[0027] exist figure 1 shows a piston internal combustion engine with four cylinders I, II, III, IV each having an intake valve 2 and an exhaust valve 3 . The intake valve 2 is connected to an intake system 4 and the exhaust valve 3 is connected to an exhaust system 5 .

[0028] Furthermore, the piston internal combustion engine shown has a direct fuel injection, for example in the form of a common injection system 6 . Fuel is sent to the common fuel injection system 6 via a pump 7 .

[0029] For actuating the intake valves, a camshaft 8 is provided, the cams of which are adjustable with respect to the opening process of the intake valves 2 and are adjustable via a cam adjuster 9 . The cam adjuster 9 is connected to a control unit 10 via which the fuel injection system, the ignition system, not shown in detail, etc., is actuated via a throttle pedal 11 as a function of a predetermined load.

[0030] In the exemplary embodiment shown in the figure, the exhaust valve 3 is actu...

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Abstract

The invention relates to a method for operating a fuel-injected, especially a directly fuel-injected, reciprocating internal combustion engine. Said engine comprises at least one outlet valve per cylinder, communicating with an exhaust gas installation, and at least one inlet valve, communicating with an air inlet installation, and means for increasing the boost pressure in the air inlet installation. The method is characterized in that a control device for variably adjusting at least the opening times of the inlet valves is provided and that in the lower engine speed range the inlet opening times of the inlet valves can be adjusted via the control device in such a manner that there is a valve overlap with the closing time of the corresponding outlet valves, thereby scavenging the cylinder with fresh charge air before charge exchange in the area of top dead center.

Description

Background technique [0001] In so-called supercharged internal combustion piston engines, the required combustion air is supplied to the cylinders at a pressure higher than ambient pressure via a supercharger. Boosting can then take place via a so-called exhaust gas turbocharger, in which a turbocompressor is driven via a turbine connected to the exhaust system, which is connected to the intake air on the pressure side. connected to the gas system. However, boosting can also take place via a so-called supercharger, the drive energy of which is extracted from the crankshaft of the piston internal combustion engine. Fuel is either injected into the intake channels of each cylinder individually by injecting the corresponding fuel quantity, or directly into the cylinders by injection. For gas exchange, each cylinder is provided with at least one exhaust valve and at least one intake valve, which are correspondingly connected to the exhaust system and the intake system. [0002]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/00F02B3/00F02B25/14F02B33/32F02B37/18F02D13/02F02D23/02F02M69/04
CPCF01L1/34F01L13/0015F02B3/00F02B25/145F02B33/32F02B37/18F02B2275/14F02D13/0215F02D13/0234F02D13/0253F02D13/0261F02D23/02F02D41/0002F02D41/0007F02D2041/001F02M69/044F01L9/20Y02T10/12Y02T10/40
Inventor 沃尔博格·赖纳马丁·霍普奥利弗·朗乔斯·盖格安德里斯·泽尔
Owner FEV
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