Intake-air cooling device for engine and method for cooling engine

Inactive Publication Date: 2016-01-07
CALSONIC KANSEI CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is a device that cools the air that enters an engine to improve its performance. The device helps to speed up the warming up of the engine and make it more efficient.

Problems solved by technology

In the case in which the low-temperature cooling water is introduced into the engine, especially when the engine is being warmed up, the cooling water temperature in the engine is decreased, and the warming up of the engine is delayed.
If the warming up of the engine is delayed, there is a problem in that a fuel consumption performance of the engine is deteriorated.

Method used

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  • Intake-air cooling device for engine and method for cooling engine
  • Intake-air cooling device for engine and method for cooling engine
  • Intake-air cooling device for engine and method for cooling engine

Examples

Experimental program
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first embodiment

[0014]FIG. 1 is an explanatory diagram of a cooling device 1 according to the present invention showing an engine 10 at the center thereof.

[0015]The cooling device 1 according to the first embodiment includes a supercharger (turbine) 18 and the engine 10 that is mounted on, for example, a vehicle so as to serve as a driving source of the vehicle, and uses cooling water (coolant) to suitably decrease a temperature of supercharged intake air.

[0016]In FIG. 1, thick arrows show a high-temperature-side cooling water circuit 31, narrow arrows show a low-temperature-side cooling water circuit 32, dotted lines show flows of exhaust gas in exhaust gas pipes 16, and one-dot chain lines show flows of intake air in intake-air pipes 14.

[0017]The cooling device 1 includes the engine 10 and a cooling water circuit 30 through which cooling water for the engine 10 flows.

[0018]Inside the engine 10, a cooling-water flow path 11 through which the cooling water flows is formed. The cooling-water flow pa...

second embodiment

[0045]Next, the present invention will be described.

[0046]FIG. 2 is an explanatory diagram of the cooling device 1 according to the second embodiment of the present invention showing the engine 10 at the center thereof. Components that are the same as those in the first embodiment are assigned the same reference signs, and a description thereof shall be omitted.

[0047]In the second embodiment, in the low-temperature-side cooling water circuit 32, a valve 85 is provided at the inlet side of the heat exchanger 76, and a bypass channel 86 bypassing the heat exchanger 76 is provided. By opening / closing the valve 85, the flow of the cooling water flowing through the heat exchanger 76 in the low-temperature-side cooling water circuit 32 is controlled.

[0048]In the second embodiment, the cooling device 1 includes a first water temperature gauge 81 that detects the water temperature of the cooling water flowing into the heat exchanger 76 from the high-temperature-side cooling water circuit 31...

third embodiment

[0062]Next, the present invention will be described.

[0063]FIG. 4 is an explanatory diagram of the cooling device 1 according to the third embodiment of the present invention showing the engine 10 at the center thereof. Components that are the same as those in the first and second embodiments are assigned the same reference signs, and a description thereof shall be omitted.

[0064]In the third embodiment, a low-temperature-side third EGR cooler 24 is provided instead of the high-temperature-side second EGR cooler 22 in the first or second embodiment, and the cooling device 1 is configured such that the cooling water in the low-temperature-side cooling water circuit 32 flows into the low-temperature-side third EGR cooler 24. The cooling device 1 includes a second heat exchanger 46 that performs the heat exchange between the cooling water in the high-temperature-side cooling water circuit 31 that flows into the high-temperature-side first EGR cooler 21 provided in the EGR circuit 20 and ...

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PUM

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Abstract

A first cooling water circuit is configured such that the cooling water that has come out from the engine passes through the first intake-air cooling device and returns to the engine again. A second cooling water circuit is configured such that the cooling water that has come out from the engine passes through the second intake-air cooling device and returns to the engine again. A heat exchanger is configured to perform heat exchange between the cooling water that has come out from the engine and flowing to the first intake-air cooling device and the cooling water that has come out from the second intake-air cooling device and that is flowing to the engine.

Description

TECHNICAL FIELD[0001]The invention relates to an intake-air cooling device provided on a supercharged engine.BACKGROUND ART[0002]An engine provided with a supercharger that supercharges intake air by using exhaust gas from the engine is generally used. As the intake air is supercharged by the supercharger, temperature of the intake air is increased to a high temperature. In a case where an EGR system in which the exhaust gas is recirculated to the intake air side is provided, the temperature of the intake air may be increased further to a higher temperature. If the temperature of the intake air is high, there is a risk that a fuel consumption efficiency is reduced.[0003]In order to prevent the fuel consumption efficiency from being reduced, a cooling device is provided for decreasing the temperature of the supercharged intake air. In the cooling device, for example, cooling water for an engine is allowed to flow into an intake air channel, and the temperature of the intake air is de...

Claims

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Application Information

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IPC IPC(8): F01P3/12F01P7/16
CPCF01P3/12F01P7/16F01P2003/182F01P2060/02F01P2060/16F02B29/0412F02B29/0443F02M26/05F02M26/28F02M26/24Y02T10/12
InventorSAKAGAWA, KONOMUYOKOSAMA, HIROKAZU
OwnerCALSONIC KANSEI CORP