RO117278B1 - Method and installation for surcharging the internal combustion engine - Google Patents

Abstract

The invention relates to a method and installation for surcharging the internal combustion engine used for propelling a road vehicle. The method comprises a first step of filtered air suction into a sealed compression chamber located in the lower crankcase of the motor, one such chamber being provided for each motor cylinder, the air being then compressed against the rear surface of the motor cylinder up to a quasi-constant value of 1.95 bars, irrespective of the motor speed, the compressed air being then discharged, through a self-controlled discharge valve, into a duct which stores it up to the moment of opening the internal combustion engine suction valve. The installation for surcharging the internal combustion engine, employed for applying the method, comprises a pressure chamber (A) for each cylinder separately, mounted in the lower crankcase of motor (1), with spherical inner walls, to allow the operation of the crank and connecting rod assembly. The pressure chamber (A) comprises two bodies (a, b) having an air suction inlet (c), an air outlet (d), a boring (e) of a diameter equal to that of the cylinder of the motor (1) and some through holes (f), a duct (11) being mounted in an orifice (g), having the role of providing a direct path for draining the oil from the lubricated area back into the oil sump.

Description

The invention relates to a method and a supercharger installation of the internal combustion engine, engine used to propel a road vehicle.

To increase the performance of internal combustion engines, a method of supercharging them is known with the help of compressors or turbochargers that compress the air or fuel mixture before it is introduced into the cylinders.

This leads to the increase of the effective average pressure, to all the speed regimes, which leads to the increase of the power developed by the engine.

The performance of the supercharger depends on the operating principle and the characteristic of the compressor.

The use of a mechanical compressor greatly raises the sale price of the vehicle.

An internal combustion engine supercharger is known to consist of compressing air in the oil bath (RO 108055).

This solution has a low cost price and a high reliability, but the value of the air pressure varies greatly, depending on the oil level in the oil bath, which means large variations in power and motor moment.

The method according to the invention eliminates the disadvantages of the aforementioned method in that, in a first phase, the suction of the filtered air takes place, in a sealed compression chamber, disposed in the lower casing of the engine, one for each cylinder, which then, it is compressed on the rear surface of the engine piston to a quasi-constant value of 1.95 bar, regardless of engine speed, after which the compressed air is discharged through a self-contained exhaust valve in a pipe where it is stored until now in which the inlet valve of the internal combustion engine opens.

The internal combustion engine supercharger, according to the invention, removes the disadvantages of the above solution by having a pressure chamber for each cylinder, mounted in the lower casing of the engine, spherical in the interior, so as to allow the assembly to operate. crank drive; the pressure chamber is composed of two bodies, which have made an inlet port, an outlet port, a bore, equal to the diameter of the engine cylinder and some passage holes, a pipe being mounted in a port and has the role of maintaining a direct way of draining the oil from the lubrication areas to the oil bath.

By applying the invention, the following advantages are obtained:

- low manufacturing cost price;

- increased reliability;

- the value of almost constant air pressure.

An example of embodiment of the invention is given below, in connection with FIG. 1 ... 5, which represents:

- fig. 1, cross section through the motor assembly;

- fig.2, axonometric diagram of the principle of the installation;

- Fig. 3, axonometric overview of the pressure chamber;

- Fig. 4, cross section according to plane B - B, through the pressure chamber;

- Fig. 5, longitudinal section according to plane A-A, through the pressure chamber.

RO 117278 Bl

The method of the invention consists of a first phase, in which the suction of the filtered air takes place, in a sealed compression chamber, disposed in the lower housing of the engine, one for each cylinder, air which is then compressed on the rear surface of the engine. of the engine piston up to a quasi-constant value of 1.95 bar, regardless of engine speed, after which compressed air is discharged through a self-contained exhaust valve 50 into a pipe in which it is stored until the valve is opened internal combustion engine intake.

The supercharger installation of the internal combustion engine, according to the invention, represented in FIG. 2, can be mounted on an existing motor 1, and consists of a pressure chamber A, composed of two bodies a, b, which are profiled at interior, 55 so that the crankshaft assembly of the engine allows operation.

Pressure chamber A has an inlet port c, wherein an inlet valve 2 and an outlet d are mounted, in which an outlet valve 3 is mounted.

Both valves 2 and 3 are self-controlled, known per se. 60

The pressure chamber A has also made a hole, which is equal to the diameter of the cylinder of the motor 1, as well as some passage holes f.

The air inlet port c is connected to an inlet pipe 4, provided with an air filter 5.

The outlet d is connected to an outlet pipe β, in which 65 there is a filter cartridge 7 and an oil separator 8, which have the role of filtering and separating the air from the oil. The separate oil is sent to the oil bath 9 through a fitting 10.

The pressure chamber A is connected to the oil bath 9, through a conduit 11, inserted into a hole g, which is intended to maintain a direct oil drainage path from the oiling areas to the oil bath. 70

Pressure chamber A ensures optimum pressure, because it determines a minimum and constant volume at the bottom of each cylinder.

When the piston 12 of the motor 1 executes the compression time, that is to say the stroke from the PMI to the PMS, the valve 2 opens, making the air intake on the route: the air filter 5 - the intake pipe 4 - the pressure chamber A. 75

When the piston 12 executes the burning time, respectively the stroke from PMS to the PMI, the inlet valve 2 closes, the air under the piston begins to be compressed, thus forcing the opening of the exhaust valve 3, which allows the pressurized air to enter the inlet pipe. evacuation 6.

When the plunger 12 executes the exhaust time, respectively the stroke from PMI to 80 PMS, the exhaust valve 3 is closed and the inlet valve 2 is opened, starting a new intake phase.

When the piston 12 executes the inlet time, respectively the stroke from the PMS to the PMI, and the inlet valve in the cylinder head opens, the air already under pressure in the pipe 6 enters the combustion chamber, due to the pressure differences, 85 and the fact that the air under the piston 12 begins to be compressed and discharged into the pipe 6, and exerts a new pressure.

At each cylinder, the piston performs a supercharger independently of the other cylinders, due to the fact that for one intake time, executed at the top of the piston, at the bottom two complete working cycles are executed. 90

RO 117278 Bl

Thus, while at the upper part the firing time is executed, at the lower part of the piston, the compressed air is discharged into the pipe connecting the pressure chamber with the combustion chamber of the respective cylinder.

When the inlet valve is opened, the entire amount of air under pressure enters the combustion chamber of the cylinder, thus supercharging.

claims

Claims (3)

1. Method for supercharging the internal combustion engine, characterized in that, in a first phase, the suction of the filtered air takes place, in a sealed compression chamber, disposed in the lower casing of the engine, one for each cylinder, air which , then, it is compressed on the rear surface of the engine piston to a quasi-constant value of 1.95 bar, regardless of the engine speed, after which the compressed air is discharged, through a self-controlled exhaust valve, into a pipe in which it is stored until the inlet valve of the internal combustion engine opens. 2. Internal combustion engine overload system, for the application of the method of claim 1, composed of an air inlet pipe, provided with an air filter, which is connected to the housing of an internal combustion engine, the housing. being connected also with an outlet pipe which contains a filter cartridge and an oil separator which transmits the oil to the oil bath, through a connection, characterized in that it comprises a pressure chamber (A), for each cylinder separately, mounted in the lower casing of the motor (1), spherical inside so as to allow the crank-crank assembly to operate. An installation according to claim 2, characterized in that the pressure chamber (A) is composed of two bodies (a, b), which have an inlet port (c), an outlet port (d), a bore (e), equal to the diameter of the engine cylinder (1) and some passage holes (f), a pipe (11) being mounted in a hole (gj, and has the role of maintaining a direct oil drain path from lubrication areas in the oil bath.