Magneti Marelli Powertrain SPA

Italy

Magneti Marelli Powertrain SPA

Italy
SEARCH FILTERS
Time filter
Source Type

A suction manifold (4) for an internal combustion engine (1) provided with a head (2) in which a number of cylinders (3) are obtained; the suction manifold (4) displays: a body (21) of the suction manifold (4) in which a suction chamber (22), which receives fresh air from the external environment, and a number of suction pipes (9), each of which connects the suction chamber (22) to a corresponding cylinder (3) of the internal combustion engine (1), are defined and which ends with an outlet mouth (23); and a choking system (15) for varying the geometry of the suction manifold (4) and comprising, for each suction pipe (9), a corresponding choking valve (16) provided with a choking element (17), which is arranged inside the suction pipe (9) and is fitted to a shaft (18) which is rotated about a rotation axis (20) by an actuator device (19); the shaft (18) of the choking system (15) is provided with a toothed wheel (46) arranged at one end of the shaft (18) itself; and the actuator device (19) displays a movable rod (47), which is linearly movable and provided with a rack (48) which meshes with the toothed wheel (46) of the shaft (18) of the choking system (15).


Patent
Magneti Marelli Powertrain S.p.A. | Date: 2010-04-28

A method of controlling an internal combustion engine (2) having at least one cylinder (3) defining a variable-volume combustion chamber; and a rotating crankshaft (15) powered by a piston (14) sliding inside the cylinder (3); the control method including the steps of: determining a recording window (W) expressed in engine angle degrees () and having a start engine angle (_(start)) and a stop engine angle (_(stop)); acquiring and memorizing the intensity (S) of sound pressure waves, generated by the internal combustion engine (2) as a function of an engine angle (), by means of at least one sound pressure sensor (21a) and within the recording window (W); and estimating the value of at least one operating parameter of a part of the internal combustion engine (2) by analysing the intensity (S) of the sound pressure waves in the recording window (W).


Patent
Magneti Marelli Powertrain S.p.A. | Date: 2010-04-21

A method for diagnosing a gaseous fuel feeding circuit (2) in an internal combustion engine (1); the feeding circuit (2) is provided with a gaseous fuel tank (5), a high-pressure branch (3) which is fed directly by the tank (5), a low-pressure branch (4), and a pressure reducer (8) interposed between the high-pressure branch (3) and the low-pressure branch (4); the diagnostic method includes the steps of reading the current value of a number of characteristic magnitudes of the gaseous fuel present in the feeding circuit (2) during the normal operation of the internal combustion engine (1); diagnosing the presence of a fault of the feeding circuit (2) by using the current value of the characteristic magnitudes of the gaseous fuel present in the feeding circuit (2) during the normal operation of the internal combustion engine (1); determining the expected value of at least one diagnostic parameter during a step of designing and developing; calculating the current value of the diagnostic parameter by using the current value of the characteristic magnitudes of the gaseous fuel present in the feeding circuit (2) during the normal operation of the internal combustion engine (1); comparing the expected value and the current value of the diagnostic parameter during the normal operation of the internal combustion engine (1); and diagnosing the presence of a fault in the feeding circuit (2) when the expected value of the diagnostic parameter is significantly different from the current value, during the normal operation of the internal combustion engine (1).


A method for determining the angular speed of a drive shaft of an internal combustion engine at each tooth event of a phonic wheel presenting a number N of teeth includes detecting the angular amplitude for each tooth; detecting the time of each tooth; and determining the raw angular speed of each tooth according to the corresponding angular amplitude and time. For each tooth a compensation value is determined which represents the difference between the actual angular amplitude of the tooth and the theoretic angular amplitude of the tooth; and determining the angular speed of each tooth by correcting the raw angular speed by means of the corresponding compensation value.


Patent
Magneti Marelli Powertrain S.p.A. | Date: 2016-05-25

Method to detect and control detonation phenomena in an internal combustion engine (1) provided with a number of cylinders (2) and with at least two detonation sensors (18); for each combustion cycle as a function of the cylinder (2) and of the engine point that is being explored, the method comprises processing the signal (S*, S**) coming from each detonation sensor (18) so as to determine a detonation energy (S_(el)*, S_(el)**) for each detonation sensor (18); calculating a detonation index (I*, I**) for each detonation sensor (18) and controlling the internal combustion engine (1) as a function of a total detonation index (I_(det)) through the algebraic sum of the detonation indexes (I*, I**) for each detonation sensor (18).


Patent
Magneti Marelli Powertrain S.p.A. | Date: 2010-02-17

A control method and unit (5) of an electric traction motorcycle (1); there are provided: an accelerator grip (7) pivotally mounted to rotate in a first rotation direction (9) and about a rotation axis (8) from a neutral position (N) towards a maximum acceleration position (A); an elastic member (11) which tends to keep the accelerator grip (7) in the neutral position (N); at least one position sensor (6) for detecting the angular position () of the accelerator grip (7) about the rotation axis (8); and a control device (12) which drives an electric machine (2) of the motorcycle (1) according to the angular position () of the accelerator grip (7); the accelerator grip (7) is mounted to rotate in a second rotation direction (10) opposite to the first rotation direction (9) and about the rotation axis (8) from the neutral position (N) towards a deceleration position (D) which is arranged in the direction opposite to the maximum acceleration position (A) with respect to the neutral position (N).


Described herein is a method for discharging a DC-link capacitance in an insulated DC-DC converter apparatus comprising a high-voltage side and a low-voltage side, the method comprising the operations of: making, in an initial step, a conversion of the energy from the high-voltage side to a low-voltage side, which comprises modulating the on times of diagonals of switches of a H-bridge for transferring the voltage at the input node onto a reactive circuit; and following upon said initial step, driving main switches and additional switches arranged so as to set selectively in electrical connection the respective first half-winding and second half-winding of a second winding of a transformer with an output node according to a first and another configuration state, in order to carry out a complete discharge of said DC-link capacitance.


Described herein is a method of DC-DC conversion with phase-shift modulation and zero-voltage switching, which envisages supplying an input voltage (Vin) to an H-bridge of switches (12), a primary winding (15) of the transformer (14) and a series-connected resonant inductance (17) being connected between the legs of the bridge (12), the switches being turned on off according to an alternating sequence, the sequence comprising a dead time during which the switches are turned off. According to the invention, said method envisages making a measurement of the current (i(t)) that flows in the transformer (14), calculating a correction of the dead-time value as a function of said measurement of the current (i(t)) for cancelling out a difference of magnetic flux in the transformer generated by a first diagonal (13a, 13d) of the bridge (12) with respect to a second diagonal (13b, 13c) of the bridge (12).


Patent
MAGNETI MARELLI POWERTRAIN S.p.A. | Date: 2013-06-12

A transformer comprising:- at least one primary winding (2);- at least one secondary winding (4); and- a magnetic core (6) designed to connect said primary winding magnetically to said secondary winding, wherein the primary winding is of the wire-type sort, whilst the secondary winding is formed by a planar element. The primary winding is formed by a wire wound in a spiral along said secondary winding.


A method and a system for determining the state of a vehicle equipped with a thermal engine and for controlling actuation of an on-board electronic device are described. An inertial sensor is arranged for detecting a variable representative of the vibrations of the thermal engine of the vehicle caused by its operation. An associated processing unit is arranged for determining a state of actuation of the engine depending on the values of the variable detected by the inertial sensor and issuing a command signal for activation or deactivation, respectively, of the on-board device depending on the determined state of actuation of the engine.

Loading Magneti Marelli Powertrain SPA collaborators
Loading Magneti Marelli Powertrain SPA collaborators