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Internal combustion engine with turbocharger

A technology of internal combustion engine and turbine, applied in the field of vehicles

Active Publication Date: 2022-07-15
OLSHAMMAR NEBULA AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Some general challenges associated with this arrangement are cost, reliability and control

Method used

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  • Internal combustion engine with turbocharger
  • Internal combustion engine with turbocharger
  • Internal combustion engine with turbocharger

Examples

Experimental program
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Embodiment Construction

[0101] Figures 10a to 10b Exhaust gas flow from a 4-stroke engine with 2 cylinders and 1 exhaust cylinder is shown schematically. No fuel is burning in the exhaust cylinder, and the cylinder is fully open toward the exhaust manifold, and there are no valves. The task of the exhaust cylinder is to first receive a part of the exhaust gas from one of the combustion cylinders (the other part of the exhaust gas goes directly to the exhaust manifold / pipe), then wait for the engine to rotate half a turn and the exhaust gas is contained by the exhaust piston. Part is sent to the exhaust pipe and turbocharger, which then receives part of the exhaust gas from another combustion cylinder, and repeats. This makes the exhaust manifold resonate at all revs.

[0102] A 4-stroke engine with 2 cylinders and 1 exhaust cylinder provides positive torque when the exhaust piston (away from the exhaust chamber) is depressed, which makes the torque curve more variable compared to a conventional 2-...

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Abstract

The invention relates to an internal combustion engine, comprising: a combustion cylinder provided with a piston and a combustion chamber; an intake valve; an exhaust valve; an exhaust pipe and a turbocharging device. The engine further includes an exhaust cylinder provided with an exhaust piston and an exhaust chamber, wherein the exhaust chamber is arranged to be in fluid communication with the combustion chamber through a passage or opening that can be closed by an exhaust valve, and wherein the exhaust chamber is Arranged in open fluid communication with the exhaust pipe to allow exhaust gas exiting the combustion chamber when the exhaust valve is open to be distributed between the exhaust chamber and the exhaust pipe.

Description

technical field [0001] The present invention relates to an internal combustion engine provided with a turbocharging device. The invention also relates to a method for operating such an engine and to a vehicle provided with such an engine to propel a vehicle. Background technique [0002] Exhaust gas from an internal combustion engine contains energy that can be used in a turbocharger, wherein the exhaust gas drives a turbine connected to a compressor that compresses intake air supplied to the engine. [0003] If the volume of air drawn in at normal air pressure is as large as the stroke volume, the volumetric efficiency (VE) of the combustion cylinder is 100%. A naturally aspirated engine is able to achieve VE of 100% when the intake and exhaust manifolds resonate. Turbocharged engines can achieve VE > 100%. [0004] Generally, small turbochargers are effective when the engine speed (revolutions per minute) is low, ie when the engine speed is low. At high revs, the vo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02B41/06F02B37/12
CPCF02B41/06F02B37/025F02B37/18Y02T10/12F02B37/12
Inventor 马茨·奥尔沙马尔
Owner OLSHAMMAR NEBULA AB
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