RU220697U1 - DEVICE FOR PROTECTING VEHICLE ENGINE AND TRANSMISSION COMPONENTS - Google Patents

Abstract

The utility model relates to the field of mechanical engineering, namely to engine crankcase protection elements for medium-duty vehicles. The engine crankcase protection serves to protect the engine from impact in the event of hitting an obstacle, to prevent dirt and dust from entering the engine compartment, and to reduce external noise.

The technical result achieved by the claimed solution is to reduce the temperature in the engine compartment of the vehicle.

This result is achieved by the fact that the device for protecting the engine and transmission units of a vehicle consists of a protective panel with technological holes, elements for fastening the protective panel to the vehicle frame, stiffeners, while the protective panel contains longitudinal and transverse intersecting stiffeners, ventilation holes, located in its inclined rear part, while at the location of the radiator of the cooling system, elements made in the form of parallelepipeds are installed in the transverse rib of the protective panel.

Description

The utility model relates to the field of mechanical engineering, namely to elements of car engine crankcase protection. The engine crankcase protection serves to protect the engine from impact in the event of hitting an obstacle, to prevent dirt and dust from entering the engine compartment, and to reduce external noise.

A known device for protecting low-lying units of the engine and transmission of a car from mechanical damage, containing a power protective panel with technological holes, elements for fastening the panel to the car, structural stiffeners and a longitudinal profile of the panel with a deflection away from the protected unit, made of a polymer composite material based on polyester resin reinforced with glass fiber with a thickness of 5 to 15 mm https://igrader.ru/komtrans/gaz-valdaj-next/ - prototype.

The disadvantages of this design are that the protection device is located behind the vehicle radiator and there is a large open gap between them, which leads to poor ventilation of the radiator due to recirculation of heated air through the existing gap, which leads to deterioration of heat removal and significant overheating of the engine during operation, especially at high ambient temperatures (Figure 5).

The technical result achieved by the claimed solution is to eliminate the above-mentioned disadvantages.

This result is achieved by the fact that the device for protecting the engine and transmission units of the vehicle consists of a protective panel of increased length, including longitudinal and transverse intersecting stiffeners, ventilation holes located in its inclined rear part, along the transverse stiffening ribs, technological holes, elements fastening the protective panel to the vehicle frame, and parallelepipeds installed in the transverse rib of the protective panel.

The claimed design solution is illustrated by drawings, where:

Fig. 1 - general view of the claimed design (isometry)

Fig. 2 - schematic movement of air flow (proposed option)

Fig. 3 - location of the claimed design on the vehicle frame

Fig. 4 - prototype

Fig. 5 - schematic movement of air flow (prototype)

The device for protecting the crankcase of a vehicle engine consists of a protective panel 1, including longitudinal 2 and transverse 3 intersecting stiffeners, side wings located at an angle to the plane of the panel, holes 4 for fastening to the car frame, a drain hole 5 and ventilation holes 6, and parallelepipeds 7 installed in the transverse rib of the protective panel at the location of the radiator of the cooling system (Figure 1).

The vehicle crankcase protection device operates as follows. The panel is attached to the car frame through mounting holes 4 using a bolted connection.

When the vehicle moves, the air flow enters the engine compartment and, dividing, part of it directly passes through the radiator, and the second, reflected from the front of the protective panel, is directed to the lower part of the radiator (Figure 2). As a result, the air flow passing through the radiator increases significantly, which helps to increase heat transfer. The air flow, most of it, passing through the radiator, flowing around the surface of the engine, falls down and, reflected from the protective panel 1, is divided into two parts. The first part of the flow returns to the engine compartment, which maintains a high temperature in the engine compartment, and the second part of the flow, passing along the lower inclined part of the panel, removes heat from the engine compartment through ventilation holes 6. A downward flow of heated air is formed in the left and right parts of the engine compartment , therefore, for optimal air flow into the ventilation holes 6, they are located in its inclined rear part of the panel 1. The air flow speed outside the crankcase protection device is greater than inside, due to this, vacuums are formed in the area of the ventilation holes 6 and most of the flow is drawn out of the area engine crankcase, preventing overheating of the oil in the sump. The dimensions and location of the ventilation holes are chosen experimentally, so that heat from the engine is effectively removed without forming turbulence, which does not allow air flows descending onto the inclined surface of the rear part of the panel 1 to overcome them and remove heat from the engine compartment (this effect occurs at large the size of the ventilation holes, and with smaller sizes, sufficient vacuum does not form for drainage). Parallelepipeds 7, installed in the transverse rib of the protective panel, prevent the return (recirculation) of heated air that has already passed through the radiator, which also helps to increase heat transfer.

The proposed design of a device for protecting engine and transmission units makes it possible to reduce the thermal load on the engine by reducing the temperature of air flows in the engine compartment.

Claims (1)

A device for protecting vehicle engine and transmission units, consisting of a protective panel with technological holes, elements for fastening the protective panel to the vehicle frame, stiffeners, characterized in that the protective panel contains longitudinal and transverse intersecting stiffeners, ventilation holes located in it inclined rear part, while at the location of the radiator of the cooling system, elements made in the form of parallelepipeds are installed in the transverse rib of the protective panel.