Internal-combustion engines – Accessories – Covers – trays – vibrators – corrosion inhibitors – air filters
Patent
1981-03-18
1983-05-24
Lazarus, Ira S.
Internal-combustion engines
Accessories
Covers, trays, vibrators, corrosion inhibitors, air filters
123195C, 123468, 285 14, F02B 7700
Patent
active
043845576
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
1. Technical Field
This invention relates generally to apparatus for draining liquids from engines and more particularly to connector fittings and conduits that permit high pressure fuel lines to pass through engine walls.
2. BACKGROUND ART
In engines that have fuel injectors that are located inside of the valve covers, the high pressure fuel lines to the injectors must pass through either a wall of the engine or the valve cover. In most cases special fittings are used which seat in a bore through the wall so that the lubricating oil is sealed within the engine and does not leak out and so that the diesel fuel does not leak into the engine and contaminate the lubricating oil.
Prior work in this field of technology includes U.S. Pat. No. 3,402,703 entitled "Fuel Connection to Cylinder Head" issued to Dickerson et al. on Sept. 24, 1968 and U.S. Pat. No. 3,489,435 entitled "Fuel Line Fitting" issued to Weber et al. on Jan. 13, 1970 and assigned to the assignee of the present invention. These devices prevent any leakage of diesel fuel in the fitting from contaminating the lubricating oil in the engine by incorporating a drain passage within the body of the fitting. Any internal leakage within the fitting flows through the drain passage, out to the atmosphere, and down the side of the engine. A further feature of these devices is that any leakage in the fittings is signals to the operator by the flow of diesel fuel on the side of the engine.
Further work in the field of couplings and fuel fittings includes U.S. Pat. No. 1,664,125 entitled "Hose Coupling" issued to Lowrey on Mar. 27, 1928; U.S. Pat. No. 2,313,323 entitled "Injector Tube Coupling Means" issued to Cowles on Mar. 9, 1943; U.S. Pat. No. 2,326,171 entitled "Fuel Injection Device" issued to Reggio on Aug. 10, 1943; U.S. Pat. No. 2,463,707 entitled "Pipe Coupling" issued to Matousek on Mar. 8, 1949; U.S. Pat. No. 2,548,904 entitled "Jet Engine Fuel Nozzle Holder and Mounting" issued to Neal et al. on Apr. 17, 1951; and U.S. Pat. No. 3,125,078 entitled "Fuel Supply System" issued to Reiners on Mar. 17, 1964.
One problem with fittings that incorporate a drain passage leading to the outside of the fitting is that in some installations the side of the engine on which the fittings are located must be located against a wall or bulkhead. Thus, any leakage from the drain passage of a fitting down the side of the engine cannot be observed by the operator.
A further problem with providing a drain passage to the atmosphere through a fuel line fitting is that the leakage may run down the respective inlet fuel line instead of the engine wall. This could possibly mislead the operator into believing that the leakage is from the fuel injection pump.
The present invention is directed to overcoming one or more of the problems set forth above.
DISCLOSURE OF THE INVENTION
In one aspect of the present invention an apparatus for draining liquid from an engine, preferably for a fuel line of the engine, is contemplated that includes a valve cover base having a bore therethrough and drain passage connected to the bore; a valve cover connected to said valve cover base and defining therewith a drain channel having a remote drain point and communicating with the drain passage; and a connector fitting having a drain port therein and being received in said bore such that liquid can be communicatfed from the drain port to the remote drain point through the drain passage and drain channel.
The present invention solves the problem of having the internal leakage from a fuel line fitting drain at an inconvenient location on the engine by providing an improved fuel line fitting that drains into a drain passage located within the engine wall. This drain passage in the engine wall is routed to the most convenient location for monitoring.
One feature that is obtained by running the drain passage in the engine wall and by locating the drain point at a location remote from the fitting is that leakage from the fitting cannot be mistaken for leakage from the fuel pump or the fue
REFERENCES:
patent: 1664125 (1928-03-01), Lowrey
patent: 2313323 (1943-03-01), Cowles
patent: 2326171 (1943-08-01), Reggio
patent: 2463707 (1949-03-01), Matousek
patent: 2548904 (1951-04-01), Neal et al.
patent: 3125078 (1964-03-01), Reiners
patent: 3194221 (1965-07-01), Dinger et al.
patent: 3390830 (1968-07-01), Kahane
patent: 3402703 (1968-09-01), Dickerson et al.
patent: 3489435 (1970-01-01), Weber et al.
patent: 3612577 (1971-10-01), Pope
patent: 3783842 (1974-01-01), Kuhn et al.
patent: 3845748 (1974-11-01), Eisenberg
patent: 3929109 (1975-12-01), Chamberlain
patent: 4149568 (1979-04-01), Kuntz et al.
patent: 4168689 (1979-09-01), Pau
patent: 4185462 (1980-01-01), Morse et al.
Caterpillar Tractor Co.
Lazarus Ira S.
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