US1756001A

US1756001A - Crank-case ventilation

Info

Publication number: US1756001A
Application number: US196839A
Authority: US
Inventors: William H Moyse
Original assignee: General Motors Research Corp
Current assignee: General Motors Research Corp
Priority date: 1927-06-06
Filing date: 1927-06-06
Publication date: 1930-04-22
Anticipated expiration: 1947-04-22

Description

April 22, 1930. 4W H, MOYSE 1,756,001

CRANK CASE VENTILATION Filed June 6, 1927 Patented Apr. 22, 1930 y UNITED STATES PATENT OFFICE WILLIAM H. MOYSE, F OSHAWA, ONTARIO, CANADA, ASSIG-NOR T0 GENERAL MOTORS Y RESEARCH CORPORATION, OF DETROIT, MICHIGAN, A CORPORATION OF DELAWARE CRANKfCASE VENTILATION Application filed .Tune 6, 1927. Serial No. 196,839.l

This invention relates to a crank case ventilator for an automobile engine.

It is the object oi the invention to provide an improved ventilator for the engine crank case, which will use suction obtained from 'part of the blast Jfrom the tan. More specically it is the objectof the invention to provide a Ventilating device which will conduct the oil fog from the crank case through the cover for the valve rocker arms. This is a simple method of Ventilating the crank case and has the advantage of utilizing the oil fog from the crank case for oiling the rocker arms.

Other objects and advantages of the invention will appear in the course of the following description, taken in connection with the acf companying drawing, and will be particularly pointed out in the appended claims.

In the drawing:

The figure is a side elevation of a conventional engine with parts broken away.

The numeral 10 indicates a conventional internal combustion motor and the numeral 12 the valve rocker arm cover. This cover is broken away at the left of the figure, disclosing the rocker arm mechanism. As the specific structure of the rocker arm mechanism is immaterial to this case, a detailed description thereof is unnecessary.

An oil filler inlet is indicated at 14 and connected to the side lot this inlet is a flexible tube 16 leading to the opening 18 in the side of the rocker arm cover. It desired, an ordinary bai-lie plate may be placed over the forvward side of the opening 18 to produce an aspirating elect. The cover is provided with an air inlet opening 20 at its front end. A similar opening 22 is provided at the rear end of the rocker arm cover and fixed in this open-4 ing is the flexible tube 24. This tube 24 extends down below the dustpan so that the fumes will not enter the car.

The operation of my device is as follows. Part of the air blast from the fan enters the opening 20 and passes along the cover through the opening 22 into the outlet tube 24, as indicated by the arrows. This creates a suction in the flexible tube 16 and a current of air is drawn from the crank case through the tube 16 into the cover l2. As-the oil within the crank case is kept well churned while the engineis running, the air conducted through the tube 16 to the cover 12 is laden with line particles of oil which keep the rocker armV mechanism well lubricated. In addition some fumes from the crank case enter the rocker arm cover through the usual tappet rod openings.

What I claim is:

1. In an internal combustion motor having a crank case and overhead mechanism, a cover for said mechanism, an outlet leading from the rear end vof said cover, an opening in the front end of said cover, and a conduit from said crank case to said cover.y

2. In an internal combustion motor having a crank vcase "and overhead mechanism, a cover for said mechanism, an outlet leading from the rear end of said cover, an opening in the front end of said cover, and a conduit leading from said crank case to a point on said cover adjacent the front end.

3. In an internal combustion motor having a crank case and overhead mechanism, al

cover for saidmechanism, an outlet leading from the rear end of said cover, an opening in the front end of said cover, a removable oil filling inlet inv said crank case, and a flexible conduit between said oil filling inlet and said cover.

4. In a structure as recited in claim 3, said conduit being connected to said cover adjacent the front end.

5. An internal combustion engine having a crankcase, an overhead valve mechanism, a cover for said mechanism forming a valve compartment, a passage establishing communication between the crankcase and the compartment for supplying oily vapors to the valve mechanism, said cover being provided with spaced air intake and discharge openings, and means for passing a stream of air into said compartment through said intake opening and out through. said discharge opening, said stream exerting an aspirating etiect on the passage to withdraw vapors from the crankcase.

6. An internal combustion engine having a cooling fan, a crankcase, and a valve compartment, a passage establishing communication between the crankcase and the compartment for supplying oily vapors to the valve mechanism, said compartment being prol vided with an opening adjacent its forward end arranged toY receive a yportion ofthe fan blast, and withan opening adjacent its rear end for the discharge of the air stream, said passage being arrangedso that it is subject to aspirating action-=of the air stream passing through the compartment to Withdraw vapors from the crankcase. l

' 7 An internal combustion engine for automobiles having a crank. case, an overhead A valve mechanism, and a cover for said mechanism forming a valve compartment, aY passage connecting the crankcase and the valve compartment for conducting oily vapors thereto, Vand a suction tube," mounted on said my; cover-and leading from saidcompartment toa pointbeneaththecar Where it is subject f `to the aspirating action ofthe passing air currents to apply suction to said compartment to remove vapors therefrom. n 25; v 8. An internal combustion engine forautomobiles having a crank case, an overhead valve mechanism, and a cover for saidmechanism forming a valve compartment,` a passage connecting the crankcase and the valve 30, compartment for conducting oily vapors thereto, anda suction tube mounted on said cover and leading from said compartment to a point beneath the car Where it is subjectfto the aspirating action ofthe passing air currents to apply suction to said compartment to` remove vapors therefrom, said engine being provided with the usual cooling fan and said cover being provided ,With an opening adja event. its forward end to receive a portion of the fan blastsaid blast assisting the aspirating action on the suction tube. v s

.In testimony whereof IaHiX my signature. WILLIAM Hi MOYSE.