Alfa Romeo S.p.a.

Alfa Romeo Auto S.p.a.

Alpha Romeo S.p.a.

Giampaolo Garcea

Filippo Surace

Edoardo Rogora

Angelo Ciccarone

Ambrogio Banfi

Edgardo Rogora

Gennaro Police

Michele L Di Stefano

The invention relates to an improvement in internal combustion engines equipped with a compressor for the feeding air, according to which the intake duct is equipped with a heat-exchanging element for cooling the air when the latter is compressed to a comparatively high pressure.

Supercharging system for internal combustion engines

This invention relates to a temperature-controlling system for the liquid coolant of an internal-combustion engine, which provides three sensing members for the temperature of said liquid in the outlet conduit from the cylinder block. Said sensors are intended to drive a valve which controls the flow of the liquid through a conduit which by-passes the radiator, a vane which controls the flow of air through a port formed through the car body, and a fan which cools said radiator respectively.

Temperature-controlling system for the liquid coolant of a motor car

This invention relates to a lubricating oil seal device for a rotating shaft support bearing, which is arranged to prevent the emergence of said oil from a collection chamber disposed at one end of the bearing, by means of a stream of air created in an annular meatus provided in the passage which communicates with said chamber.

Lubricating oil seal device for rotating shaft bearings

The invention relates to a motor vehicle driven by an internal-combustion engine housed in a compartment, the latter having at least one opening (24) through which the flow of air is controlled by a vane (22) which is operatively connected to means (25) sensing the temperature of the engine-cooling fluid.

Motor vehicle having an internal-combustion engine fitted with means for

This invention relates to a timing variator device for an internal combustion engine, comprising a coupling between the cam shaft and the drive gear, which is capable of making angular movements between the coupled parts according to the rotational speed, and in which said movement is actuated by the engine lubricating oil under the control of a valve element constituting the member sensitive to the engine speed.

Automatic timing variator for an internal combustion engine

This invention relates to a coolant circuit for internal combustion engines, specially for motor vehicles. In order to improve the engine operation after cold starting, there is provided a second valve which cooperates with the usual thermostatic valve so as to lower substantially to zero the flow rate of the coolant through the circulating pump and the engine when the engine and the coolant are still cold and limited power is requested.

Circuit of the coolant in internal combustion engines for improving

An internal combustion engine comprises a combustion chamber located between a spherical-cup bottom wall of the engine head and a crown top wall of the piston. The crown wall includes of five wall portions, of which first and second side portions are convex, third and fourth side portions are flat, and a fifth central portion is concave.

Combustion chamber for an internal combustion engine

A device is disclosed which detects the knocking phenomena in a controlled-ignition internal combustion engine, the device essentially comprising two ionization probes arranged in a zone of the explosion chamber remote from the sparking plug: the probes deliver signals when the state of ionization changes and the time interval between the signals of the two probes is measured and compared with an appropriate reference value.

Device for detecting the knocking phenomenon in controlled-ignition

A device is disclosed for refining the adjustment of the angle of ignition advance in an internal combustion engine. The angles of rotation of the crankshaft relative to the top dead center of an engine cylinder, relative to the start of ignition and the completion of combustion are detected electronically and signals are processed which are expressive of the magnitudes of said angles: these magnitudes are compared in a comparison circuit which is calibrated according to an optimum preselected ratio between the two angles. The electronic comparison circuit is capable of commanding the controlled-ignition system of the engine so as to modify the angle of advance of ignition continually, keeping it constantly to the desired optimum value.

Device for refining the adjustment of the ignition advance of a

In an internal combustion engine in which overheating phenomena in the explosion chamber are to be monitored and prevented, a temperature sensor is arranged in the region far from the sparking plug to send signals to a governing electronic circuitry which is arranged for modifying the ignition advance responsively to abnormal situations and for restoring normal running conditions as soon as the disturbing phenomena have ceased to occur.

Controlled-ignition I.C. engine with thermal detection system

In a controlled ignition internal combustion engine, two temperature sensors, one of which is placed in the farthest position relative to the spark plug and the other in the vicinity of the spark plug in a cylinder, generate signals the difference of which is significant for the detection of the knock phenomenon. As the temperature differential of the two sensors exceeds a preselected magnitude, a warning signal may be delivered on the dashboard, or the controlled ignition system of the engine may receive a command for reducing the angle of advance of ignition until ordinary, non-knock conditions are restored for the engine.

Device for detecting the knock phenomena in internal combustion engines

This invention relates to a timing variator for the timing system of a reciprocating internal combustion engine of the type having a camshaft for the intake valves and another camshaft for the exhaust valves. At least one of said camshafts is coupled to a driving gear through an annular piston housed in a cavity connected to the outside through a slide valve. The latter includes a valve element provided with an eccentric mass, which is able to overcome the force of a preloaded spring and to move the valve element from open to closed position when the rotational speed of the engine is higher than a predetermined value.

Timing variator for the timing system of a reciprocating internal

A regulation device is disclosed, for regulating a physical magnitude as a function of two independent parameters: the parameters can be, for example, parameters of interest in the operation of an internal-combustion engine. Instead of the conventional space cam, a surface is provided on which the third dimension is represented by different voltage so as to define on such a planar or curved surface a family of equipotential curves. The readings taken by a conductive follower are mechanically converted so as to govern the appropriate component parts of an engine so as to have an automatical adjustment of certain parameters. The device is dependable and reliable and cannot be prone to jamming or mechanical defects. The device is of the potentiometric class.

Potentiometric regulator of a physical magnitude which is a function

This invention relates to an automatic device for controlling the pressure of the intake air of an internal combustion engine as its operating altitude varies. The device according to the invention comprises first valve means adapted to keep the air pressure downstream of the said valve means substantially constant and equal to the external pressure corresponding to a predetermined altitude, first actuator means which control said first valve means as a function of an operating pressure which varies with the altitude and reaches at said predetermined altitude a value equal to the substantially constant value downstream of the first valve means, and second valve means controlled by second actuator means sensitive to an absolute pressure which is a function of the external atmospheric pressure, said second valve means being able to modulate said operating pressure.

Automatic device for controlling the pressure of the intake air of an

A catalytic muffler for internal combustion engines of cylindrical flattened construction having an inner casing containing the catalyst. Annular flow patterns are provided for gas entry and exit wherein the gas pressure and thus velocity remain substantially constant. The specific connections of the circular faces of the inner casing to the annular wall thereof are slip designed with the design of the outer half shells providing the holding force to keep the same in yieldable, contact throughout the various temperature changes undergone.

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Milan, Italy

Giampaolo Garcea