CN201110209Y

CN201110209Y - Enclosed respiratory system of 2.8L diesel engine

Info

Publication number: CN201110209Y
Application number: CNU2007200415630U
Authority: CN
Inventors: 刘凯; 杨志恒; 朱增怀
Original assignee: Anhui Jianghuai Automobile Group Corp
Current assignee: Anhui Jianghuai Automobile Group Corp
Priority date: 2007-11-22
Filing date: 2007-11-22
Publication date: 2008-09-03
Anticipated expiration: 2017-11-22

Abstract

The utility model relates to a closed respiratory system of a 2.8L diesel engine. The improvement is that a baffle plate is arranged on the top surface inside a cylinder head cover, three pieces of oil baffles are vertically and evenly distributed on the inner lateral surface of the baffle plate, three oil drain pipes are evenly distributed on the periphery of the outer lateral surface of the baffle plate, the oil drain pipes are hook-shaped angle pipes, and the structure design of the baffle plate forms a labyrinth type oil and gas separator to realize the separation of the oil and the gas. The respiratory system has good oil and gas separating effect, which maintains the crankcase pressure of the 2.8L diesel engine at a comparative constant negative pressure condition and lowers the oil consumption of the engine, and simultaneously the engine can satisfy the demands of 2.8 L Euro II, and Euro III diesel engines.

Description

A kind of rebreather of 2.8L diesel engine

Technical field

The utility model relates to technical field of internal combustion engines, relates in particular to a kind of rebreather of 2.8L diesel engine.

Background technique

Respiratory system is by the gas in the crankcase being drawn, be equal to or less than atmospheric pressure thereby keep crankcase pressure, being beneficial to the more system of good berth of motor.Respiratory system is divided into open type respiratory system and rebreather.The main distinction of the respiratory system of two kinds of patterns is as follows: (1) open type respiratory system: the gas in the crankcase, links to each other with atmosphere by the crankcase ventilation flexible pipe after the process diaphragm valve is drawn through after the Oil-gas Separation.The shortcoming of the respiratory system of this structure is to contain certain oil gas composition in the gas that comes out of crankcase ventilation flexible pipe, and after the time grown, oil gas gathered into oil droplet and drips, befouling environment; Simultaneously, because ambient air pressure is a standard atmospheric pressure, the crankcase pressure inside only can not have lower negative pressure near barometric pressure, can not make crankcase inside reach better state.(2) rebreather: the gas in the crankcase, links to each other with the air-strainer rear end by the crankcase ventilation flexible pipe after the process diaphragm valve is drawn through after the Oil-gas Separation.The respiratory system of this structure had both been avoided the pollution of a spot of oil gas to environment, can obtain the negative pressure low than the open type respiratory system (the air-strainer rear end is a negative pressure) again.

The model utility content

The purpose of this utility model is: a kind of rebreather that satisfies a kind of 2.8L diesel engine of arrangement space and Europe II, Europe III emission request is provided.

Concrete structural design scheme is as follows:

A kind of rebreather of 2.8L diesel engine comprises valve mechanism cover, diaphragm valve, crankcase ventilation flexible pipe, air-strainer;

The inboard end face of described valve mechanism cover is provided with dividing plate, vertical uniform three oil baffles in dividing plate inner side surface middle part, and dividing plate outer side surface periphery is uniform to be communicated with three oil exit pipes, and described oil exit pipe is the hook solid bend pipe;

Described oil baffle height is 23 millimeters, and width is 35 millimeters;

Described oil exit pipe diameter is

Millimeter,

Distance between the described oil extraction mouth of pipe and the dividing plate is 45 millimeters.

The crotch of described oil exit pipe is upwards curved.

The utility model is by the improvement to existing 2.8L diesel engine cylinder housing internal structure, make this respiratory system that good oil gas separation be arranged, make 2.8L diesel engine crankcase pressure maintain more constant negative pressure state, reduced the consumption of lubricating oil of this motor; Can satisfy simultaneously the needs of 2.8L Europe II, Europe III diesel engine.

Description of drawings

Fig. 1 is the utility model structural representation,

Fig. 2 is a valve mechanism cover internal structure schematic representation,

Fig. 3 is the diaphragm structure schematic representation,

Fig. 4 is the rear view of Fig. 3,

Fig. 5 is the side view of Fig. 3.

Embodiment

Below in conjunction with accompanying drawing, the utility model is done to describe further by embodiment.

Embodiment:

Referring to Fig. 1, the general arrangement of 2.8L diesel engine comprises body 6, and body 6 bottoms are oil sumps 7, and the top is a cylinder head 5, and its rebreather comprises valve mechanism cover 4, diaphragm valve 3, crankcase ventilation flexible pipe 2 and air-strainer 1.

Valve mechanism cover 4 inboard end faces are installed with dividing plate 8, see Fig. 2; Vertical uniform three oil baffles 9 in dividing plate 8 inner side surfaces middle parts, the oil baffle height is 23 millimeters, width is 35 millimeters; The uniform connection of dividing plate outer side surface periphery is installed with three oil exit pipes 10, and oil exit pipe 10 is the hook solid bend pipe, and the mouth of pipe is upwards curved, and oil exit pipe 10 diameters are

Millimeter, the distance between the oil extraction mouth of pipe and the dividing plate is 45 millimeters.

During diesel engine work, gas in the crankcase is through the dividing plate 8 on the valve mechanism cover 4, the structural design of dividing plate 8 forms mazy type oil gas separating mechanism oil gas is separated, oil after the separation is got back to oil sump downwards by oil exit pipe 10, and gas is higher than at crankcase pressure and upwards enters the pressurized machine suction tude by diaphragm valve, crankcase ventilation flexible pipe 2 under the situation of pressurized machine suction tude place pressure, in cold back enter combustion chambers burn by intake manifold.

Claims

1, a kind of rebreather of 2.8L diesel engine comprises valve mechanism cover, diaphragm valve, crankcase ventilation flexible pipe, air-strainer, it is characterized in that:

The inboard end face of described valve mechanism cover is provided with dividing plate, vertical uniform three oil baffles in dividing plate inner side surface middle part, dividing plate outer side surface periphery uniform three oil exit pipes, described oil exit pipe is the hook solid bend pipe;

Described oil baffle height is 23 millimeters, and width is 35 millimeters;

Described oil exit pipe diameter is

Millimeter,

2, the rebreather of a kind of 2.8L diesel engine according to claim 1 is characterized in that: the crotch of described oil exit pipe is upwards curved.