Combustion chamber intake device

Abstract

In an intake arrangement for a combustion chamber in which a first intake duct produces a substantially rotational flow in the chamber, the flow from a second intake duct is divided into two components. The first component is an axial flow into the chamber and the second component is a rotational flow having the same sense of rotation as the first duct. The first and second components arise from the shaping of a junction region between branches of the second intake duct adjacent the chamber.

Description

technical field [0001] The present invention relates to an air intake device for a combustion chamber, and in particular to an air intake configuration for a combustion chamber of a direct-injection diesel engine. Background technique [0002] An important aspect when designing a combustion chamber or cylinder, and the ports associated with it, is the creation of an effective region of intra-chamber motion in the form of axial swirls known as "vortices". Efficient designs create a high degree of swirl to allow rapid distribution of air or air / fuel mixture within the combustion chamber which will produce efficient combustion. [0003] Another design criterion is the discharge coefficient, which is a measure of the mass flow from the port, or the permeability of the combustion chamber, which represents how efficiently the intake port fills the combustion chamber with air or an air / fuel mixture. This is also known as engine air intake. [0004] In known four-cylinder engines,...

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Problems solved by technology

However, the use of swirl sheets will inevitably cause a decline in volumetric efficiency

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