Combustion engine with fresh gas line to increase turbulence

Patent metadata

Field	Value
Publication number	US-10634097-B2
Application number	US-201514920141-A
Country	US
Kind code	B2
Filing date	Oct 22, 2015
Priority date	Nov 4, 2014
Publication date	Apr 28, 2020
Grant date	Apr 28, 2020

Abstract

A combustion engine has at least one cylinder with a gas exchange inlet valve and a gas exchange outlet valve. A fuel injection device injects fuel directly into the cylinder. A fresh air section can be connected intermittently for fresh gas transmission to the cylinder via the gas exchange inlet valve. An exhaust section can be connected intermittently for exhaust gas transmission to the cylinder via the gas exchange outlet valve. A throttle element is provided in the fresh air section ahead of the gas exchange inlet valve in the direction of flow of a fresh air. A fresh gas line is provided, which opens into the fresh air section after the throttle element, in the region of the at least one gas exchange inlet valve. The fresh gas line opens into the fresh air section via a nozzle, which has flow according to Bernoulli, Venturi or Coanda.

First claim

What is claimed is:

1. A combustion engine, comprising:
a cylinder having a gas exchange inlet duct, a gas exchange inlet valve associated with the gas exchange inlet duct, a gas exchange outlet duct, and a gas exchange outlet valve associated with the gas exchange outlet duct;
a fuel injection device that injects fuel directly into the cylinder;
a fresh air section connectable intermittently for gas transmission by the gas exchange inlet duct to the cylinder via the gas exchange inlet valve;
an exhaust section connectable intermittently for gas transmission from the cylinder via the gas exchange outlet valve;
an exhaust turbocharger having a turbine in the exhaust section and a compressor in the fresh air section;
a first throttle provided in the fresh air section downstream of the compressor but ahead of the gas exchange inlet valve in a flow direction of fresh air;
a fresh gas line, which is taken to a point in the gas exchange inlet duct ahead of the gas exchange inlet valve;
a second throttle in the fresh gas line setting a cooling rate of fresh air flowing through the fresh gas line; and
a nozzle communicating the fresh gas line with the gas exchange inlet duct at said point, the nozzle opening laterally through a wall of the gas exchange inlet duct into the gas exchange inlet duct, said point being closer to the gas exchange inlet valve than the cylinder;
wherein the nozzle has a flow according to Bernoulli, Venturi, or Coanda; and
wherein the nozzle is made of metal or plastic.

2. The combustion engine according to claim 1 , wherein fresh air injected into the gas exchange inlet duct via the nozzle is injected at an angle of 60° relative to a flow axis.

3. The combustion engine according to claim 1 , further comprising:
a pressure accumulator or a compressor feeding compressed or fresh air to the fresh gas line.

4. The combustion engine according to claim 2 , further comprising:
a pressure accumulator or a compressor feeding compressed or fresh air to the fresh gas line.

5. The combustion engine according to claim 1 , further comprising a vortex tube arranged in the fresh gas line receiving compressed fresh air from the second throttle.

6. The combustion engine according to claim 3 , further comprising a vortex tube arranged in the fresh gas line receiving compressed fresh air from the second throttle.

Assignees

• Bayerische Motoren Werke Ag
• Bayerische Motoren Erke Ag

Inventors

• Petz Roland

Classifications

• F02M2023/008

  by injecting compressed air directly into the combustion chamber · CPC title

• F02M23/003

  Particular shape of air intake · CPC title

• F02B29/0481

  Intake air cooling by means others than heat exchangers, e.g. by rotating drum regenerators, cooling by expansion or by electrical means · CPC title

• F02M23/006 Primary

  Valves specially shaped for supplying secondary air · CPC title

• Y02T10/146

  Cross-Sectional Technologies · mapped topic