EP1013901A1

EP1013901A1 - An independent system of lubrication

Info

Publication number: EP1013901A1
Application number: EP99123077A
Authority: EP
Inventors: Pierluigi Zanini; Salvatore Riccobene
Original assignee: Officine Lovato SpA
Current assignee: Officine Lovato SpA
Priority date: 1998-12-22
Filing date: 1999-11-22
Publication date: 2000-06-28
Also published as: CN1260444A; TR199903055A2; ITVI980241A1; BR9906255A; IT1302477B1; AR021726A1; ITVI980241A0

Abstract

The independent system of lubrication comprises essentially pump (3) which feeds the lubrication oil which is sucked by means of piping (4), reservoir (5) and is sent to motor (1) by means of piping (6), the latter being connected to the conduit of entry (7) of the combustible in the same motor. The system is characterized by the fact that it is applied and utilized for the lubrication of an internal combustion motor having a two-stroke engine, initially constructed and functioning with the liquid combustible called "mixture" and which subsequently is fed with the gaseous combustible (GPL) which is a gas from liquefied petroleum, methane and similar gases.

Description

FIELD OF THE INVENTION

The present invention relates to a system for the independent lubrication of an internal combustion motor having a two-stroke engine fed with a gaseous combustible such as GPL which is a liquefied petroleum gas, methane and similar gases.

BACKGROUND OF THE PRIOR ART

It is known that in internal combustion motors having a two-stroke engine with a liquid combustible, the lubrication of the cylinder is obtained by mixing with benzene a certain percentage of an oil and in this manner one prepares the so-called "mixture". More recently the use of a gaseous combustible such as GPL, methane and similar materials has met with substantial application also in internal combustion motors having a two-stroke engine. The main technical problem which must be solved in order to provide that a common internal combustion motor having a two-stroke engine planned for functioning with benzene must also function better with a gas, is the lubrication of the cylinder and other structures.

SUMMARY OF THE INVENTION

The first object of the invention is to apply a lubrication system of the cylinder to internal combustion motors having a two-stroke engine planned and constructed for functioning with feeding the mixture and subsequently is fed with a gas and to provide a system which in addition to providing for safe and accurate functioning is also of a simple construction, quick mounting and limited cost.
Another object of the invention is to provide a lubrication system adapted for installation in an internal combustion motor operating with a two-stroke engine fed with only benzene rather than with a mixture of benzene and oil.
Still another object of the invention is to provide a lubrication system for an internal combustion motor having a two-stroke engine which is applicable to motors planned to function with a mixture and with a gas alternatively.
A further object of the invention is to provide a lubrication system for an internal combustion motor having a two stroke engine applicable to motors which have been planned for functioning alternatively with a mixture and with a gas.
The system according to the present invention comprises a mechanical pump of normal production, a reservoir for the oil of lubrication provided with a level sensor, tubing for sucking which connects the reservoir with the pump and an injection tubing which connects the pump to the conduit which feeds the combustible into the motor. In particular, there is provided that the pump used for feeding the lubrication oil receives the motion of rotation directly from the motor by means of a transmission structure which connects the pump with the shaft of the motor.

BRIEF DESCRIPTION OF THE DRAWING

This and other features of the invention will become more evident by reference to Figure 1 which shows the main components of an internal combustion motor operating with a two stroke engine which can function alternatively with benzene or a gas.
As shown in Figure 1 the internal combustion motor (1) operating with a two-stroke engine puts in rotation by means of the transmission structure (2) keyed to the shaft of the motor or on another derived structure the pump (3) which feeds the sucked in lubrication oil by means of piping (4) from reservoir (5) and sent to the motor by means of a piping (6) which is connected to the entry conduit (7) of the combustible in the motor.
In order to avoid the damage of the structures of the motor which must be lubricated due to the lack of oil, the reservoir (5) is provided with an automatic breaker preferably of the floating type which provides by means of an electrical circuit to interrupt the electrical current supplied to the sparking plugs and therefore blocks the motor when the level of oil in the reservoir is less than the minimum level.
The system according to the present invention is mounted on a vehicle provided with a functioning circuit of the motor with liquid combustible and a functioning circuit of the same motor with a gaseous combustible, these devices being disposed parallel with respect to the entry conduit of the combustible and functioning alternatively. Circuit A for the functioning of the liquid combustible is composed essentially by the reservoir of the mixture (8), the air filter (9) and carburator (10).
Circuit B for the functioning of the gaseous combustible is composed essentially by the reservoir of gas (11), the pressure reducer (12) and a mixer (13) for the gas and air.
The quantity of oil necessary for the lubrication of the structures of the motor depends on the number of turns of the motor and the load of the same motor so that the pump (3) which feeds the oil is controlled by the shaft of the motor and also by the position of the manual accelerator (14) which is communicated to the pump through the cable (15).
Obviously in the functioning of the liquid combustible the position of the manual accelerator (14) obtained always by the same cable (15) regulates the functioning of the carburator.

Claims

An independent system of lubrication comprising essentially a pump (3) for feeding the lubrication oil which is sucked by means of piping (4) from the reservoir (5) and is sent to the motor (1) by means of piping (6), said piping (6) connecting with the conduit of entry (7) of the combustible into said motor, said lubrication system being applied and utilized for the lubrication of an internal combustion motor having a two-stroke engine, constructed initially and functioning with the liquid combustible "mixture" and subsequently being fed with a gaseous combustible, said gaseous combustible being (GPL) a gas from liquefied petroleum, methane and similar gases.
The independent system of lubrication according to claim 1 wherein the pump which feeds the oil receives the motion of rotation by means of transmission structures and return structures, said structures being joints, pulleys, gears and others connected with the shaft of the motor.
The lubrication system according to claims 1 and 2 wherein the quantity of oil necessary for the lubrication of the structures of the motor depends upon the number of turns of the motor and the load of the same motor whereby said pump (3) which feeds the oil is controlled by the shaft of the motor and also by the position of the manual accelerator (14) through cable (15), said manual accelerator during the functioning with a liquid combustible controls through the said cable (15) the functioning of the carburator.
The independent system of lubrication according to one or more of the preceding claims wherein for the purpose of avoiding the damage of the structures of the motor to be lubricated due to the lack of oil, said oil reservoir (5) is provided with an automatic breaker preferably of the floating type, said breaker providing by means of an electrical circuit for the interruption of the electrical current which is provided to sparking plugs and therefore providing for blocking the motor when the level of oil in the reservoir is less than the minimum level.
The system of lubrication according to one or more of the preceding claims characterized by the fact that it is mounted on a vehicle, said vehicle being provided with circuit A for functioning of the motor with a liquid combustible and circuit B for functioning of the same motor with a gaseous combustible, said circuits being disposed parallel with respect to the conduit of entry of the combustible and functioning alternatively, said circuit A for the functioning with a liquid combustible being composed essentially by the reservoir for the mixture (8), air filter (9) and carburator (10), said circuit B for the functioning with a gaseous combustible being composed essentially by reservoir of gas (11), pressure reducer (12) and a mixture of gas and air (13).
The system of lubrication according to one or more of the preceding claims characterized by the fact that it is mounted and functions on an internal combustion motor having a two-stroke engine fed only with benzene.