Method for operating a quantity-regulated internal combustion engine and internal combustion engine

A quantity control, internal combustion engine technology, applied in the direction of internal combustion piston engine, engine control, combustion engine, etc., can solve the problem of insufficient efficiency improvement of internal combustion engine, and achieve favorable effects of fuel consumption

Active Publication Date: 2013-09-11
BAYERISCHE MOTOREN WERKE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The disadvantage of the method described above is that the increase in the efficiency of the quantity-controlled internal combustion engine is not yet sufficient, which is also significantly lower than that of a mass-controlled internal combustion engine, in which the load is controlled, for example, by means of a lean-burn method (λ>1)

Method used

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  • Method for operating a quantity-regulated internal combustion engine and internal combustion engine
  • Method for operating a quantity-regulated internal combustion engine and internal combustion engine
  • Method for operating a quantity-regulated internal combustion engine and internal combustion engine

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Embodiment Construction

[0031] In the following, the same reference numerals are used for the same structural elements in all figures.

[0032] figure 1 A schematic illustration of an internal combustion engine according to the prior art with load control via a throttle valve. Via the intake system 2 , an internal combustion engine 1 with cylinders symbolized by four circles draws in combustion air which first passes through an intake muffler 9 and then past a throttle element 12 , such as a throttle valve or cylinder slide valve. The inhaled combustion air is then combusted with the fuel in the cylinder and discharged again as exhaust gas through the exhaust line 3 in which an exhaust gas cleaning device 10 for cleaning the exhaust gas and Followed by a muffler 11.

[0033] The conventional load control of the quantity-controlled (λ=1) internal combustion engine 1 is achieved via the throttle element 12 by “dilution” of the intake air in the intake line upstream of the intake valves of the intern...

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Abstract

The invention relates to a method for operating a quantity-regulated internal combustion engine (1), having an intake system (2) and an exhaust train (3), wherein an expansion machine (4) is arranged in the intake system (2), upstream of an inlet valve of the internal combustion engine (1) in the direction of flow of combustion air, the output shaft (4') of which expansion machine (4) can be coupled to an output shaft (V) of the internal combustion engine (1), wherein a heat exchanger (5) which can be arranged on the exhaust train (3) is provided, and wherein combustion air is heated in the heat exchanger (5) by exhaust gas of the internal combustion engine (1) before said combustion air flows through the expansion machine (4). The method according to the invention brings about a significant improvement in the efficiency of an internal combustion engine with quantity-regulated load control in the partial load mode.

Description

technical field [0001] The invention relates to a method for operating a quantity-controlled internal combustion engine with the features of the preamble of claim 1 and to an internal combustion engine with the features of the preamble of claim 6 . Background technique [0002] German patent publication DE 10116264 A1 discloses a method for operating an internal combustion engine with supercharging and variable compression. In this method for operating an internal combustion engine with a mechanical compressor arranged in the intake system and which can be driven by the crankshaft via a coupling device, combustion air is fed into the engine intake. In addition, a device is provided for variably adjusting the compression ratio in the combustion chamber, by means of which a higher compression ratio is set in the part load range of the internal combustion engine and a lower compression ratio is set in the full load range. The air mass flow to be delivered by the compressor is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B33/36F02D9/02F02D9/08F02B33/44F02M31/087F02M31/08F02B37/04F02B39/04
CPCF02B29/0406F02B41/00F02D9/02F02D2009/0283F02M31/083F02M35/10255F01N5/02F02B33/44F02M26/13Y02T10/12
Inventor H·菲舍尔
Owner BAYERISCHE MOTOREN WERKE AG
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