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Unit for simulating the pressure and temperature conditions of the air drawn in by a reciprocating internal combustion engine

An internal combustion engine, reciprocating technology, applied in internal combustion engine testing, internal combustion piston engines, combustion air/combustion-air treatment, etc., can solve problems that do not include technical features

Active Publication Date: 2013-11-13
UNIV POLITECNICA DE VALENCIA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] So far, there is no invention in the prior art that contains the technical features defined by the system provided by the present invention

Method used

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  • Unit for simulating the pressure and temperature conditions of the air drawn in by a reciprocating internal combustion engine
  • Unit for simulating the pressure and temperature conditions of the air drawn in by a reciprocating internal combustion engine
  • Unit for simulating the pressure and temperature conditions of the air drawn in by a reciprocating internal combustion engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] In specific embodiment 1 of the present invention, such as figure 1 As shown, the unit includes:

[0065] (a) variable geometry radial flow radial turbine (2), the variable geometry radial flow radial turbine (2) includes an airflow adjustment or control valve (8), and the airflow adjustment or control valve (8) can be The stator of the radial flow radial turbine (2) with variable geometry. The gas flow expands in said radial flow centripetal turbine (2) from a first state of pressure p0 and temperature T0 to a second state of pressure p1 and temperature T1, where p0 and T0 correspond to said reciprocating internal combustion engine The pressure and temperature of the atmosphere A1 where it is located, and p1 and T1 correspond to the pressure and temperature of the airflow inhaled by the reciprocating internal combustion engine (1);

[0066] (b) The first container (4), which is located behind the radial-flow centripetal turbine (2) and at the air inlet of the recipro...

Embodiment 2

[0079] according to figure 2 , this second embodiment is characterized in that it comprises figure 1 The equipment of the unit shown and the second air-to-air heat exchanger (13) for utilizing the airflow at the discharge of the centrifugal compressor (3) to heat the airflow at the air inlet of the radial flow centripetal turbine (2), and if it is necessary to use the temperature regulation system (10) composed of electric resistance for heating, the required electricity can be reduced. .

[0080] This particular embodiment of the invention may also comprise a valve (14) as a branch of said second air-to-air heat exchanger (13) for cooling by means of the thermoregulation system (10) prevent heating of the airflow at the inlet of the radial flow centripetal turbine (2). In any case, the temperature regulation system ( 10 ) will be responsible for fine-tuning the temperature T1.

[0081] Another object of the present invention is to provide the method employed by the unit ...

Embodiment 3

[0085] Such as image 3As shown, in this particular embodiment, said unit may comprise said centrifugal compressor (3) located after said second container (5). The centrifugal compressor (3) sucks exhaust gas from the second container (5) and increases the pressure of the exhaust gas at the inlet port of the vacuum pump (6), saving energy for the vacuum pump (6). However, the pressure p2 can still be adjusted by means of a variable frequency drive of the electric motor of the vacuum pump ( 6 ).

[0086] Thus, this particular embodiment of the invention does not include said back pressure valve (9), since it is no longer needed.

[0087] The unit also comprises a third air-water heat exchanger (15) for cooling the exhaust gas to the temperature of the atmosphere A1 at the inlet of the centrifugal compressor (3).

[0088] The unit also comprises a gas flow one-way pipe or check valve (16) which in this particular embodiment 3 bypasses the centrifugal compressor (3). If the pr...

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Abstract

The invention relates to a unit for simulating the pressure and temperature conditions of an air flow drawn in by a reciprocating internal combustion engine (1) at a height above sea level, corresponding to the operating height of said reciprocating internal combustion engine (1). According to the invention, the unit comprises at least: (a) a radial inward-flow turbine (2) for expanding an air flow towards the pressure and temperature of the air drawn in by the reciprocating internal combustion engine; (b) a first container (4) and (c) a second container (5) connected to the first container (4) by means of at least one connection pipe (7) in order to balance the pressure between the two containers; (d) a centrifugal compressor (3); and (e) a vacuum pump (6) for maintaining pressure equal to the pressure of the air flow drawn in by the reciprocating internal combustion engine (1). The invention also relates to the use of said unit for simulating the pressure and temperature conditions of the air drawn in by a reciprocating internal combustion engine.

Description

technical field [0001] The present invention relates to a system and method for reproducing the pressure and temperature conditions of air taken in by a reciprocating internal combustion engine. In particular, the present invention relates to systems and methods that allow the simulation of pressure and temperature regimes of reciprocating internal combustion engines operating at different altitudes. Background technique [0002] In order to determine the fixed pressure and temperature at different altitudes in the atmosphere for the development and debugging of engines or other aircraft components, the International Civil Aviation Organization (ICAO) was established in 1952 and stipulated the International Standard Atmosphere (ISA). [0003] When designing equipment to operate at a specific altitude, it is important to account for changes in atmospheric pressure and temperature relative to the point of measurement with increasing altitude, which affect air composition and d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M15/04
CPCG01M15/04G01M15/02F02M35/10242Y02T10/12Y10T137/0379Y10T137/6416Y10T137/86002
Inventor 弗朗西斯科·佩里·冈萨雷斯何塞·玛丽亚·德桑蒂斯·费尔南德兹何塞·加林多·卢卡斯何塞·拉蒙·塞拉诺·克鲁兹
Owner UNIV POLITECNICA DE VALENCIA
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