CN2921303Y

CN2921303Y - Vehicle engine crankcase ventilating system

Info

Publication number: CN2921303Y
Application number: CN 200620074543
Authority: CN
Inventors: 冯武堂; 朱庆华; 吴泽荣; 汪旻浩
Original assignee: Chery Automobile Co Ltd
Current assignee: Chery Automobile Co Ltd
Priority date: 2006-06-27
Filing date: 2006-06-27
Publication date: 2007-07-11
Anticipated expiration: 2016-06-27

Abstract

The utility model discloses an automobile engine crankcase ventilation system, comprising an intake manifold pressure regulating cavity (1) and an intake manifold (4) interconnected with it. The intake manifold pressure regulating cavity (1) is communicated with the intake main (7) via an intake manifold main mounting surface (5), the intake manifold (4) is communicated with the cylinder head (9) via an intake manifold cylinder head mounting surface (3). An idling ventilation pipe (2) communicated with a crankcase (8) is provided on said intake manifold pressure regulating cavity (1), the aperture of said pipe is smaller than that of a crankcase air intake ventilation pipe (6). When the technical scheme of the utility model is adopted, the crankcase is ventilated using ventilation pipes mounted at different positions in the idling condition and other conditions, namely the idling ventilation pipe with a smaller inner diameter is used for ventilation in the idling condition, reducing the crankcase pressure in the idling condition and improving the working condition of the crankcase effectively.

Description

A kind of automobile engine crankshaft box ventilation system

Technical field

The utility model relates to motor car engine, and more particularly, the utility model relates to a kind of automobile engine crankshaft box ventilation system.

Background technique

At present, all shared ventilation duct of engine crankcase ventilation great majority is installed on suction port, promptly under any operating mode, all uses same admission line to carry air to crankcase, and crankcase is cooled off.But under idling operation, the air inflow of cylinder reduces, and suction port degree of vacuum is less than normal, and crankcase pressure is excessive, influences the important spare part such as bent axle, connecting rod, main bearing of crankcase and the proper functioning of lubricant oil.

The model utility content

Problem to be solved in the utility model provides a kind of automobile engine crankshaft box ventilation system, its objective is to reduce the excessive pressure of crankcase ventilation system under motor car engine idling situation.

To achieve these goals, technical conceive of the present utility model is under idling operation, and using the tubule that is installed in the intake manifold pressure stabilizing cavity is that the idling ventilation duct ventilates, and under other operating mode, uses the suction port ventilation duct to ventilate.

The corresponding technological scheme of taking is: this automobile engine crankshaft box ventilation system that is provided, comprise the intake manifold pressure stabilizing cavity and the intake manifold that interconnect, the intake manifold pressure stabilizing cavity is communicated with the intake manifold by intake manifold house steward attachment face, intake manifold is communicated with cylinder head by intake manifold cylinder cap attachment face, described intake manifold pressure stabilizing cavity is provided with an end and communicates with it, the idling ventilation duct that the other end communicates with crankcase, the aperture of its pipeline is less than the aperture of crankcase intake ventilation duct.

Described idling ventilation duct is connected with engine electric-controlled unit by automatically controlled circuit with the crankcase intake ventilation duct, by engine electric-controlled unit the keying of idling ventilation duct and crankcase intake ventilation duct is controlled.

Adopt technique scheme, make the crankcase ventilation of the utility model under idling operation and other operating modes use the ventilation duct that is installed in diverse location to carry out, promptly when idling operation, ventilate with the less idling ventilation duct of internal diameter of the pipeline, can effectively reduce the crankcase pressure under the idling operation, improve the working condition of crankcase.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is a suction tude profile schematic representation of the present utility model.

Number in the figure is: 1, intake manifold pressure stabilizing cavity, 2, idling ventilation duct, 3, intake manifold cylinder cap attachment face, 4, intake manifold, 5, intake manifold house steward attachment face, 6, crankcase intake ventilation duct, 7, the intake manifold, 8, crankcase, 9, cylinder cap, 10, cylinder body, 11, engine electric-controlled unit, 12, automatically controlled circuit.

Embodiment

The of the present utility model structural representation expressed as Fig. 1, shown in the expressed suction tude profile schematic representation of the present utility model of Fig. 2, the utility model is a kind of automobile engine crankshaft box ventilation system, comprise the intake manifold pressure stabilizing cavity 1 and the intake manifold 4 that interconnect, intake manifold pressure stabilizing cavity 1 is communicated with intake manifold 7 by intake manifold house steward attachment face 5, intake manifold 4 is communicated with cylinder head 9 by intake manifold cylinder cap attachment face 3 cylinder caps, air in the intake manifold 7, by intake manifold pressure stabilizing cavity 1, enter each intake manifold 4, enter cylinder then, burn with fuel oil, produce power, promote piston motion and then drive crankshaft rotating by connecting rod.

The utility model to the cooling means of crankcase 8 is: on intake manifold pressure stabilizing cavity 1, has additional an end and communicates with it, and the idling ventilation duct 2 that the other end communicates with crankcase 8, the aperture of its pipeline is less than the aperture of crankcase intake ventilation duct 6.When idling operation, ventilate with idling ventilation duct 2, practical function is for reducing its air output.During other operating mode, ventilate with crankcase intake ventilation duct 6.

Because idling operation adopts different ventilation ducts to ventilate with other operating mode, adopt engine electric-controlled unit (ECU) that the conversion of each pipe ventilated route is controlled.Idling ventilation duct 2 is connected with engine electric-controlled unit 12 by automatically controlled circuit 12 with crankcase intake ventilation duct 6, is controlled by the keying of 12 pairs of idling ventilation ducts 2 of engine electric-controlled unit and crankcase intake ventilation duct 6.

Under idling operation, using the tubule that is installed in intake manifold pressure stabilizing cavity 1 is that idling ventilation duct 2 ventilates, because this place's degree of vacuum is bigger than suction port place degree of vacuum, can effectively reduce the pressure of the crankcase 8 under the idling operation, improves the working condition of crankcase.Other operating modes use crankcase intake ventilation duct 6 to ventilate, and guarantee that this moment, ventilation promptly guaranteed the effect of ventilating.

In conjunction with the accompanying drawings the utility model has been carried out exemplary description above; obviously the utility model specific implementation is not subjected to the restriction of aforesaid way; as long as the various improvement of having adopted method design of the present utility model and technological scheme to carry out; or directly apply to other occasion without improvement, all within protection domain of the present utility model.

Claims

1, a kind of automobile engine crankshaft box ventilation system, comprise the intake manifold pressure stabilizing cavity (1) and the intake manifold (4) that interconnect, intake manifold pressure stabilizing cavity (1) is communicated with intake manifold (7) by intake manifold house steward attachment face (5), intake manifold (4) is communicated with cylinder head (9) by intake manifold cylinder cap attachment face (3), it is characterized in that: described intake manifold pressure stabilizing cavity (1) is provided with an end and communicates with it, the idling ventilation duct (2) that the other end communicates with crankcase (8), the aperture of its pipeline is less than the aperture of crankcase intake ventilation duct (6).

2, according to the described automobile engine crankshaft box ventilation system of claim 1, it is characterized in that: described idling ventilation duct (2) is connected with engine electric-controlled unit (12) by automatically controlled circuit (12) with crankcase intake ventilation duct (6), by engine electric-controlled unit (12) keying of idling ventilation duct (2) and crankcase intake ventilation duct (6) is controlled.