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Method for operating an internal combustion engine, and internal combustion engine for carrying out said method

An internal combustion engine and exhaust valve technology, applied to internal combustion piston engines, combustion engines, machines/engines, etc., can solve problems such as reducing the effective efficiency of the engine, and achieve the effects of improving fuel consumption, reducing ignition lag time, and reducing residual gas content.

Active Publication Date: 2011-12-28
AUDI AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So-called scavenging losses reduce the effective efficiency of the engine

Method used

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  • Method for operating an internal combustion engine, and internal combustion engine for carrying out said method
  • Method for operating an internal combustion engine, and internal combustion engine for carrying out said method
  • Method for operating an internal combustion engine, and internal combustion engine for carrying out said method

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Embodiment Construction

[0035] exist figure 1 A schematic diagram of a turbocharged four-cylinder internal combustion engine 1 according to the invention is shown in . Fuel can enter the combustion chamber 2 of the cylinder 3 via a fuel supply 4 , which is indicated by an arrow on the fuel supply 4 . Each cylinder has an intake valve 5a and an exhaust valve 5b.

[0036] The mixture supply takes place via a mixture supply device 6 . An air compressor 7 is located in the intake region of internal combustion engine 1 . The air supply is indicated by an arrow on the air compressor 7 . The exhaust system 8 has an exhaust gas turbine 9 that can be driven by exhaust gas. It goes without saying that the invention can also be realized in principle in internal combustion engines without exhaust gas supercharging. Furthermore, a catalytic converter 10 is arranged in the exhaust system 8 . The composition of the combustion mixture can be influenced by means of an exhaust gas recirculation device 11 . The ...

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Abstract

The invention relates to a method for operating an internal combustion engine comprising at least two cylinders respectively provided with admission valves and exhaust valves. According to the invention, in order to fill the cylinders with a larger amount of unburned gas during a gas exchange, the exhaust interval is reduced and the crossover phase of admission and exhaust intervals is extended, for at least one cylinder (3). The invention also relates to an internal combustion engine for carrying out said method.

Description

technical field [0001] The invention relates to a method for operating an internal combustion engine and an internal combustion engine for carrying out the method. Background technique [0002] An at least partially poor fresh-gas charging of the combustion chamber is contrary to the goal of high torque at low and very low rotational speeds in four-stroke engines. Especially in the case of engines with an exhaust gas supercharger (turbocharged engine), it is not possible to design the turbocharger optimally for the low mass flow of the exhaust gas flow in the low speed range. As is known per se, the charge of the combustion chamber before the start of compression consists of a part of the unburned air-fuel mixture and a part of the combusted mixture. Depending on the boundary conditions of the engine, the combusted mixture fraction can be of the order of magnitude up to 10% of the total charge of the combustion chamber. Due to the high temperature of the residual gas from ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D13/02F02M25/07
CPCF02D13/0257F02D13/0215Y02T10/121Y02T10/18F02D13/0261F02M25/0752F02M25/0715F02M26/13F02M26/01Y02T10/12
Inventor R·布达克M·库恩M·松纳S·登格勒
Owner AUDI AG
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