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supercharged internal combustion engine

A technology for internal combustion engines and superchargers, applied to internal combustion piston engines, combustion engines, gas turbine devices, etc., can solve the problems of increasing the manufacturing cost of internal combustion engines, increasing the installation space, and reducing the reliability of internal combustion engines

Active Publication Date: 2022-07-05
MAN TRUCK & BUS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, such a switchable valve mechanism results in a complicated control mechanism, thereby increasing the manufacturing cost of the internal combustion engine, increasing the installation space, and / or reducing the reliability of the internal combustion engine

Method used

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  • supercharged internal combustion engine
  • supercharged internal combustion engine
  • supercharged internal combustion engine

Examples

Experimental program
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Embodiment Construction

[0034] figure 1 A schematic block diagram of an embodiment of an internal combustion engine, generally designated by reference numeral 100, is shown. The internal combustion engine 100 includes a valve control device 102 that closes at least the intake valve 104 of the internal combustion engine 100 outside of UT (specifically, at Miller closing time or Atkinson closing time). Additionally, the internal combustion engine 100 includes an electrified exhaust gas turbocharger 106 having a turbine 108 , a compressor 110 and an electric machine 112 . The electric machine 112 of the electrified exhaust gas turbocharger 106 can selectively operate as an electric motor or a generator, and thus may also be referred to as a motor-generator unit (M / G). Additionally, the internal combustion engine 100 includes a control unit (SG) 114 for controlling the operation of the electric machine 112 of the electrified exhaust gas turbocharger 106 .

[0035] According to control unit 114 , in a f...

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Abstract

The present invention relates to an internal combustion engine (100). The internal combustion engine (100) includes a valve control device (102) for closing an intake valve (104) of the internal combustion engine (100) at Miller closing time or Atkinson closing time. The electrified exhaust gas turbocharger (106) of the internal combustion engine (100) includes an electric machine (112) selectively operable as an electric motor or a generator. The control unit (114) operates the electric machine (112) of the electrified exhaust gas turbocharger (106) as an electric motor in a first load range of the internal combustion engine (100) and turbocharges the electrified exhaust gas in a second load range The electric machine (112) of the engine (106) operates as a generator, wherein the second load range corresponds to a greater load of the internal combustion engine (100) than the first load range.

Description

technical field [0001] The present invention relates to an internal combustion engine, eg for driving a vehicle. In particular, the present invention describes an internal combustion engine with Miller off time or Atkinson off time. Background technique [0002] Only a few years after the basic invention of the four-stroke principle of A.E. Beau de Rochas and N.A. Otto was used a closing time of the intake valve that deviates significantly from bottom dead center (Totpunkt, UT), making Due to the longer expansion stroke compared to compression, the combustion gas expands further, cools better and thus makes better use of the energy contained in the gas. In particular, it has been known for a long time that due to earlier closing (before UT) or later closing (eg more than 40° after UT) of the intake valve according to Miller or Atkinson, in contrast to conventional control High unit load (ie, mechanical power output in relation to fuel consumption) can be achieved with lowe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02B39/10
CPCF02B39/10F02B37/10F02B37/18F02D13/0269F02D23/02F02D41/0007F01N5/04F01N2590/11B60K6/485B60W10/06B60W10/08B60W30/1882B60W20/10F02B37/14F02B37/005Y02T10/12Y02T10/62F02C5/00F02C6/14F05D2220/40F05D2220/60F05D2270/07H02K7/1823H02K11/0094
Inventor 约阿希姆·韦伯
Owner MAN TRUCK & BUS AG