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INVENTION
Patent of the Russian Federation RU2083855
V-SHAPED TURBOCHARGING ENGINE OF INTERNAL COMBUSTION
Applicant's name: Joint Stock Company "KamAZ"
The name of the inventor: R. Zagidullin; Kustarev Yu.S.
The name of the patent owner: Joint-stock company "KamAZ"
Address for correspondence:
The effective date of the patent: 1993.03.26
Usage: in engine building, namely in charge-air cooling systems in internal combustion engines with gas turbine supercharging. SUMMARY OF THE INVENTION: A V-shaped turbocharged internal combustion engine, each cylinder bank of which is provided with a turbocharger with a charge-air cooling system comprising a charge air line consisting of an intake manifold, supply and discharge pipelines, a two-section charge air cooler, the sections of which are connected by a common manifold, and Its input and output are respectively communicated with the turbochargers and the engine intake manifold, in which the cooler sections are united by a common collector manifold and have separate manifolds each associated with a turbocharger of a respective row of cylinders, the heat transfer surface of the cooler on the charge air side has turbulators in the form of Cuttings in the fins of heat transfer surfaces, and each of the turbochargers is connected to its intake manifolds via a bypass valve.
DESCRIPTION OF THE INVENTION
The invention relates to engine building, in particular to systems for cooling charge air in an engine with gas turbine supercharging.
A device is known for adjusting the temperature of the air supplied by the compressor in the internal combustion engine, comprising a charge air cooler, supply and discharge pipelines, a bypass valve, and a bypass line (UK patent No. 1255956, class F 1B 2B1 2B13M 2B15 2B25, 1971) .
Such a device is difficult (there is a bypass line), as well as high losses of charge air pressure in the cooling channel due to their large extent.
The closest solution is the internal combustion engine for AS. USSR N 1546683 (class F 01 P 3/20, 1990) containing a charge-air cooling system including a charge air system consisting of an intake manifold, supply and discharge pipelines, a two-section charge air cooler, the sections of which are united by a common distributing collector, and Its input and output are respectively communicated with the turbochargers and with the intake manifold.
This solution significantly reduces the length of the charge air ducts in the cooler, thereby reducing the pressure loss, but it has a complex configuration of the supply and discharge pipelines (especially for V-engines with two turbochargers) due to the need to combine the charge air flows from the compressors for the supply In the cooler, which increases the hydraulic losses of the tract and complicates the layout in the engine compartment.
The technical goal of the invention is to increase the economy of the engine and reduce its cost.
The task is achieved due to the fact that in a known internal combustion engine each cylinder bank of which is equipped with a turbocharger and having a charge air cooling system including a charge air system consisting of an intake manifold, supply and discharge pipelines, a two-section charge air cooler, an inlet and The output of which is communicated respectively with the turbochargers and the engine intake manifold, the cooler sections are united by a common collector manifold and have separate distributing manifolds, each of which is connected to the turbocharger of the respective cylinder bank. In addition, the heat transfer surface of the cooler on the charge air side can have turbulators, for example in the form of cuts in the fins of the heat transfer surfaces, and each of the turbochargers can be connected to their intake manifolds via a bypass valve.
Additional new features are:
Supply of the heat transfer surface of the cooler from the charge air side with turbulators, for example, in the form of cuts in the fins of heat transfer surfaces;
The connection of each of the turbochargers with their intake manifolds via a bypass valve that allows the charge air to flow directly into the intake manifold, bypassing the cooler.
The combination of the cooler sections by the common collector allows simplifying the path through the charge air, which reduces pressure losses and reduces manufacturing costs.
Execution of distributing collectors by separate and connected to the turbocharger of the corresponding semi-block provides the shortest and simplest way of the charge air flow, and also allows to organize the possibility of supply of charge air, bypassing the cooler along the shortest path.
Supplying the heat transfer surface of the cooler from the charge air side with turbulators, for example, in the form of cuts in the fins of heat transfer surfaces, makes it possible to increase the thermal efficiency of the cooler, based on its low hydraulic resistance (thanks to a two-section design).
The connection of each of the turbochargers with their intake manifolds via a bypass valve allows the delivery of charge air directly to the intake manifold, bypassing the cooler.
 1 shows a diagram of a V-shaped internal combustion engine, top view |
 FIG. 2 two-section engine cooler |
The engine comprises a two-section cooler 1, sections 2 and 3 of which are combined by a collector 4 connected to the intake manifolds 5 and 6 of the respective semi-blocks by means of a discharge pipe 7. The cooler sections 2 and 3 have distributing manifolds 8 and 9 connected to respective turbochargers 10 and 11 by means of Feed pipes 12 and 13. At the end of each of the exhaust manifolds 5 and 6, the bypass valves 14 and 15 are installed on the side of the turbochargers.
The coolant channels 1 on the charge air side are provided with heat transfer ribs 16 with turbulators 17 in the form of punctures.
The engine works as follows. Atmospheric air enters the turbochargers 10 and 11, from where the charge air is supplied to the dispensers 8 and 9 of the cooler 1 through the supply pipes 12 and 13, then through the channels of the sections 2 and 3 of the cooler 1, the air is directed to the collection manifold 4 and from there to the intake manifolds 5 and 6 of the engine through the discharge pipe 7. The bypass valves 14 and 15 at idle, low engine loads and especially at low ambient temperatures switch the charge air from the turbochargers 10 and 11 directly to the intake manifolds 5 and 6, bypassing the cooler 1. The turbulators 17 of the heat transfer surfaces 16 swirl the charge air stream and thereby intensify the heat exchange process.
Thus, the proposed technical solution makes it possible to simplify the design of the charge air circuit, improve the thermal and hydraulic efficiency of the charge air cooler and optimize the engine operation mode depending on operating conditions.
CLAIM
1. A V-shaped turbocharged internal combustion engine, each cylinder bank of which is provided with a turbocharger and having a charge-air cooling system including a charge air line consisting of an intake manifold, supply and discharge pipelines, a two-section charge air cooler, the sections of which are connected by a common manifold, and Its input and output are respectively communicated with the turbochargers and the engine inlet manifold, characterized in that the cooler sections are united by a common collector manifold and have separate dispensing manifolds, each of which is connected to the turbocharger of the respective cylinder bank.
2. The engine according to claim 1, characterized in that the heat transfer surface of the cooler from the charge-air side has turbulators, for example, in the form of notches in the fins of the heat transfer surfaces.
3. The engine of claim 1, wherein each of the turbochargers is connected to its intake manifolds via a bypass valve.
print version
Date of publication 28.12.2006гг
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