WO2015038087A2

WO2015038087A2 - An engine cooling system

Info

Publication number: WO2015038087A2
Application number: PCT/TR2014/000345
Authority: WO
Inventors: Husnu Arda ODABASIOGLU; Hasan Ayarturk
Original assignee: Tofas Turk Otomobil Fabrikasi Anonim Sirketi
Priority date: 2013-09-16
Filing date: 2014-09-16
Publication date: 2015-03-19
Also published as: TR201310902A2; EP3047124A2; WO2015038087A3

Abstract

The present invention relates to an engine cooling system (1); which can be operated without using electrical fan motor, ventilator part, engine mounting equipments, electric cable, relay and support brackets; provides fuel saving as the required air flow is provided by the waste heats; and additionally which does not produce fan noise as it does not have a fan and which also does not require maintenance since it does not include any moveable parts.

Description

DESCRIPTION

AN ENGINE COOLING SYSTEM Field of the Invention

The present invention relates to an engine cooling system which is operated by means of recovery the waste heat of the engine. Background of the Invention

In automobiles working with internal combustion engines, the radiator is connected with the cooling channels that extend along the cylinder and engine block to which the coolant is pumped. This coolant is generally water mixed with ethylene glycol (antifreezing agent). The coolant travels from the radiator to the engine in a closed system and during this travel, carries the heat on the engine parts to the radiator. The radiator is generally mounted on the grill section on the front part of the vehicle. Cold water passes through these grills and cools the radiator. Even though sometimes cold air is formed due to the movement of the vehicle, in some cases it is provided by the cooling fan located in front of the radiator. This cooling fan is expensive and heavy. High amount of electric energy is required for operation thereof. Since complex moveable parts that are driven by electric motors are required for the cooling fan system, failure risk and maintenance cost are high. Furthermore, the fan system has a disturbing noise level and expensive insulation materials are needed for elimination of this noise. Additional volume is required for its installation.

The Russian patent document no. RU2355015 (CI), known in the state of the art, discloses enhancement of automatic regulators and systems for regulating temperature of cooling media (water, oil etc.) of thermal engines. Thermal engines have a cooling medium, an amplifier and a three-way bypass valve. The microprocessor connects the temperature regulators of the thermal engines. These regulators have a temperature sensor of the external cooling air, power sensor of the thermal engine and a flow sensor of the cooling medium flowing through the heat pump of the thermal engine. Four sensors are connected to a microprocessor. The microprocessor has a program for operation in accordance with a mathematical model of the cooling system of the thermal engine as an object of temperature regulation in static. Thus, for automatic variation of the transfer constant of the temperature regulator output signals of these four sensors are used. With this invention, fuel consumption decreases and efficiency of the thermal engine increases.

The International patent document no. W09717536(A1), an application in the state of the art, discloses a device which controls cooling and heating the fluids in vehicles. The compressed air is delivered to a vortex tube or air amplifier. Thus, the compressed air rapidly expands and cools. Cooling takes place at the first end of the vortex tube (14) and at the warmer second end (18). A first fuel inlet port (20) of a first heat exchanger (16) lies proximate the first end (16). This way the fuel flowing through the inlet port (20) is cooled by thermal contact with the first end (16) of the vortex tube (14). A cooled fuel outlet port (22) of the heat exchanger (16) lies proximate the first end. For this reason, the cooled fuel leaves the heat exchanger (16) for delivery to an engine. A valve with an upstream gate (26) and two downstream gates (28, 30) are located so that fuel is delivered to the first fuel inlet port (20) and one of the two downstream gates (28, 30). Summary of the Invention

An objective of the present invention is to provide an engine cooling system which can be operated without using electrical fan motor, ventilator part, engine mounting equipments, electric cable, relay and support brackets. Another objective of the present invention is to provide an engine cooling system which provides fuel saving as the required air flow is provided by the waste heats.

A further objective of the present invention is to provide an engine cooling system which does not produce fan noise as it does not have a fan and which also does not require maintenance since it does not include any moveable parts.

Detailed Description of the Invention

An engine cooling system developed to fulfill the objectives of the present invention is illustrated in the accompanying figures, in which:

Figure 1 is the schematic view of the engine cooling system.

Figure 2 is the perspective view of the radiator group on which the engine cooling system is located.

Figure 3 is the side view of the radiator group on which the engine cooling system is located.

The components shown in the figures are each given reference numbers as follows:

1. Engine cooling system

2. Engine

3. Turbo unit

4. Fresh air inlet

5. Exhaust outlet

6. Compressed air outlet

7. Intercooler

8. By-pass outlet

9. Air amplifier

10. Radiator An engine cooling system (1); which can be operated by means of recovery of the engine waste heat and thus without using electrical fan motor, ventilator part, engine mounting equipments, electric cable, relay and support brackets; basically comprises

at least one internal combustion engine (2);

at least one turbo unit (3) which enables to compress the exhaust gas discharged from the engine (2),

at least one fresh air inlet (4) which is located in the turbo unit (3) and enables to intake air from the outer environment,

at least one exhaust outlet (5) which enables the exhaust gases coming from the engine (2) and entering the turbo unit (3) to be transferred to the outer environment,

at least one compressed air outlet (6) through which the air compressed in the turbo unit (3) is discharged,

at least one intercooler (7) wherein the air coming from the compressed air outlet (6) is cooled,

at least one by-pass outlet (8) which enables to separate a part of the air which is cooled in the intercooler (7) and which moves towards the engine (2), - at least one air amplifier (9) into which the air coming from the bypass outlet (8) enters and where high cooling process is carried out,

at least one radiator (10) which cools the hot water that it circulates therein via the air amplifier (9). Engine cooling systems used nowadays are comprised of fan - fan motor group, shroud, stator, fan frame and radiator - condenser - cooling group. The hot water which is heated with the warmth of the engine while traveling in the engine passes through the radiator group. When the temperature of the water reaches a certain value, the fan motor is activated by a signal received by the thermometer and the fan propeller rotates and sucks (or pumps) air over the radiator group and thereby the heat of the hot water is enabled to be transferred to the air and the water temperature starts to be reduced. When the water temperature decreases to a determined value, the fan and the fan propeller are disabled by the signal received by the thermometer and thereby overcooling is prevented. In the engine cooling system (1) of the present invention, the hot exhaust gases discharged from the exhaust outlet manifold located at the engine (2) pass through the turbo unit (3) of the vehicle and are delivered to the compressed air outlet (6). At the same time, the fresh air drawn by the turbo unit (3) from the fresh air inlet (4) is compressed and delivered via the compressed air outlet (6) to the intercooler (7) where it is cooled. The compressed and cooled air leaving the intercooler (7) is sent back to the engine (2) and thus a larger air mass is delivered to the engine (2) cylinder. This in turn increases efficiency and power of the engine (2). When an engine cooling system (1) is operational; in order to prevent the counter pressure, which is formed because the air intake to the engine (2) decreases when the driver releases the gas pedal, from slowing down the turbo unit (3) propeller and decreasing efficiency, a part of the hot exhaust gases are bypassed by a by-pass valve and without being delivered to the turbo unit (3), they are directly delivered to the exhaust outlet (5) and transferred to the outer environment. Additionally, when the engine (2) rpm is over a certain value, the turbo unit (3) is disabled and uncontrolled power increase of the engine (2) is prevented. For this purpose, in the engine cooling system (1), the turbo unit (3) is comprised of moveable flaps and upon movement of these flaps according to the exhaust pressure - hot gas flow, a controlled compressed air production is obtained. The reason for this is that the turbo unit (3) has a capacity of producing compressed air more than the requirement of the engine (2). However since the current capacity of the turbo unit (3) cannot be reduced to meet the pressure requirement at low rpms, an engine cooling system (1), where surplus compressed air can be used for medium or high rpms, is produced. Thus the turbo unit (3) will not have to be disabled at high rpms and the surplus compressed air that is produced is used by the engine cooling system (1). In addition, the surplus exhaust gases do not have to be bypassed and directly delivered to the exhaust outlet (5) in order to prevent the turbo unit (3) from slowing down and decreasing efficiency due to the counter pressure when the driver releases the gas pedal. This way, the surplus compressed air formed at the moment when the driver releases the gas pedal can be used at the time of operation corresponding to the heating of the engine (2).

The engine cooling system (1) of the present invention comprises a fan - fan motor. An air amplifier (9) is placed where the fan motor is located and the cooling process is performed by means of this air amplifier (9). The cooled and compressed air is delivered from the by-pass outlet (8) to the air amplifier (9). The air supplied from here is blown or sucked by the air amplifier (9) towards the radiator (10). This way, the fluids in the radiator (10) are cooled to the preferred values. The engine (2) is supplied by preferably 95% part of the air cooled and compressed by the intercooler (7). No decrease takes place in the air supplied to the engine (2) at medium and high rpms. The entire surplus air drives the air amplifier (9). This way, although the same cooling process is being carried out, cooling equipments such as the radiator fan and propeller, cables, resistor and control system which are employed in the prior art, are not used. While a more lightweight and inexpensive cooling process is obtained with the engine cooling system (1) of the present invention, the energy required for operation of the radiator (10) is provided by the heat of the waste exhaust gases and the use of a high power electric motor is eliminated. Thus fuel saving is attained and the engine emission values are reduced. Furthermore, saving is enhanced as the need for the alternator or charging generator power used for electric production decreases as well.

Claims

1. An engine cooling system (1); which can be operated by means of recovery of the engine waste heat and thus without using electrical fan motor, ventilator part, engine mounting equipments, electric cable, relay and support brackets; basically characterized by

at least one internal combustion engine (2);

- at least one fresh air inlet (4) which is located in the turbo unit (3) and enables to intake air from the outer environment,

- at least one compressed air outlet (6) through which the air compressed in the turbo unit (3) is discharged,

at least one by-pass outlet (8) which enables to separate a part of the air which is cooled in the intercooler (7) and which moves towards the engine (2),

- at least one air amplifier (9) into which the air coming from the bypass outlet (8) enters and where high cooling process is carried out,

at least one radiator (10) which cools the hot water that it circulates therein via the air amplifier (9).

2. An engine cooling system (1) according to Claim 1, characterized by the compressed air outlet (6) to which the hot exhaust gases discharged from the exhaust outlet manifold located at the engine (2) are delivered after passing through the turbo unit (3) of the vehicle. An engine cooling system (1) according to any one of the preceding claims, characterized by the compressed air outlet (6) through which the fresh air that is drawn by the turbo unit (3) from the fresh air inlet (4) and compressed is delivered to the intercooler (7).

An engine cooling system (1) according to any one of the preceding claims, characterized by the intercooler (7) which is used for compressing and cooling the air, and which enables to deliver a larger air mass to the engine (2) cylinder by sending the air to the engine (2).

An engine cooling system (1) according to any one of the preceding claims, characterized by the turbo unit (3) which, when the engine (2) rpm is over a certain value, is disabled and thereby prevents uncontrolled power increase of the engine (2).

An engine cooling system (1) according to any one of the preceding claims, characterized by the turbo unit (3) which is comprised of moveable flaps and enables to obtain a controlled compressed air production upon movement of these flaps according to the exhaust pressure - hot gas flow.

An engine cooling system (1) according to any one of the preceding claims, characterized by the turbo unit (3) which does not have to be disabled at high rpms, and thereby enables the produced surplus compressed air to be used by the air amplifier (9).

An engine cooling system (1) according to any one of the preceding claims, characterized by the air amplifier (9) which is placed where the fan motor is located and which performs the radiator (10) cooling process. An engine cooling system (1) according to any one of the preceding claims, characterized by the air amplifier (9) which enables the air delivered through the by-pass outlet (8) to be blown or sucked towards the radiator (10).