Sistemi Sospensioni S.p.a.

Magneti Marelli

Magneti Marelli Powertrain, S.p.a.

Marelli Autronica

Magneti Mirelli S.p.a.

Marelli Autornica S.p.a.

Marelli Europe S.p.a.

Marelli Suspension Systems Italy S.p.a.

Andrea Nepote

Giordano Greco

Piero Antonio Conti

Luca Poggio

Piero Maria Carbonaro

Paolo Marceca

Michele Cagnoni

Cesare Stefanini

Andrea Tonoli

Renato Galluzzi

Nicola Amati

Marcello Boella

Francesco Inglese

Mario Milazzo

Gabriele Giraudo

Giuseppe Lorusso

Dario Decurti

Milena Federico

Davide Fantino

Gianpiero Cabodi

Piero De La Pierre

Daniele Campinoti

A suspension including a spring interposed between the body (B) of the vehicle and the wheel (W); a regenerative hydraulic shock-absorbing unit comprising a hydraulic shock-absorber arranged parallel to the spring, a motor and pump unit with a volumetric hydraulic machine and an electric machine coupled to the hydraulic machine), and an electronic control unit arranged to control the torque of the electric machine. A hydraulic actuator is arranged in series with the spring. A reservoir and a hydraulic circuit are connected to each other, the hydraulic shock-absorber, the hydraulic machine the hydraulic actuator and the reservoir. The hydraulic circuit includes a valve assembly for controlling the flow of a working fluid between the hydraulic shock-absorber, the hydraulic machine, the hydraulic actuator and the reservoir.

Vehicle suspension with a regenerative hydraulic shock-absorber and with a system for adjusting the attitude of the vehicle

An apparatus and a method for managing the energy supplied to a low-voltage system of a vehicle. The low-voltage system includes a battery, which supplies the first voltage on a low-voltage bus. A system for charging the battery includes an alternator for supplying a charging voltage to the battery, and motor-vehicle loads supplied by the battery and/or by the alternator. A high-voltage system operates at a second voltage higher than said first voltage. The high-voltage system includes the vehicle energy-recovery stage. The second voltage is supplied through an intermediate energy-storage system and a DC-DC converter. A control module that carries out energy-management operations at least by the alternator. The second voltage of the DC-DC converter is regulated via a control procedure of a hysteretic type.

Apparatus for managing the energy supplied to a low-voltage system of a motor vehicle that comprises an energy-recovery stage, and corresponding method

An apparatus and a method for managing the energy supplied to a low-voltage system of a motor vehicle that comprises an energy-recovery stage. The low-voltage system, operating at a first voltage, comprises a battery, a system for charging the battery, and motor-vehicle loads supplied by the battery and/or by the alternator. A high-voltage system operates at a second voltage higher than the first voltage. The high-voltage system includes the vehicle energy-recovery stage, which supplies the second voltage. The second voltage is supplied through an intermediate energy-storage system and a DC-DC converter, which converts the second voltage into the first voltage on the low-voltage bus. A module regulates the alternator, that activates at least one first operating mode in which the alternator regulates a voltage of the battery at a nominal operating value.

The shock-absorber comprises: a cylinder containing a hydraulic working fluid; a piston slidably arranged in the cylinder so as to split the cylinder into two variable-volume working chambers, namely a first working chamber, or extension chamber, and a second working chamber, or compression chamber; an auxiliary conduit in fluid communication on one side with the first working chamber and on the other with the second working chamber; a train of permanent magnets slidably arranged in the auxiliary conduit so as to reciprocally move along the auxiliary conduit, dragged by the working fluid flowing between the first and second working chambers through the auxiliary conduit as a result of the reciprocating motion of the piston in the cylinder; and electric energy generating device for generating electric energy by exploiting the movement of the train of permanent magnets along the auxiliary conduit.

Regenerative hydraulic shock-absorber for vehicle suspension

A method for control of an injector in an internal combustion engine in which for a specific engine cycle, a control unit calculates a desired value of the opening time of the injector and forwards this desired value to a drive circuit of the injector, a supervision device calculates an actual value of the opening time of the injector during the injection phase, compares this actual value with the desired value and generates an error signal if the difference between the desired value and the actual value is outside a predetermined acceptability range.

Method for the control of an injector in an internal combustion engine

A method and device for driving an injector in an internal combustion engine in which a current wave which is variable over time, which comprises an initial section substantially of a pulse type and having a relatively high current intensity, an intermediate section during which the current intensity is rapidly reduced to substantially zero values and a final section having a substantially constant and relatively low current intensity, is caused to circulate through a control circuit of the injector.

Method and device for driving an injector in an internal combustion engine

The circuit comprises a switched dc/dc converter of the 'fly-back' type, a second switched dc/dc converter of the 'feed-forward' type, an H-shaped bridge switching circuit which is connected to the dc/dc converters and in the central branch of which the discharge lamp and an associated reactive starter device are disposed, and a control circuit which can drive the dc/dc converters and the bridge switching circuit in a manner such that, each time the lamp is switched on, a very high voltage is applied initially, in particular, in order to start the lamp, and subsequently a low voltage is applied, but with a high electrical power, in order to support the passage of a large current through the lamp during the heating (warming-up) of the lamp and during the subsequent steady operation of the lamp.

Ballast for a gas-discharge lamp, particularly for motor vehicles

The circuit including a capacitor which is alternately discharged and charged in synchronism with the signal which develops across the terminals of a resistor operating to detect the current in the lamp. A sawtooth wave form is thus obtained, which is compared with a threshold level which is varied in dependence on the current which it is necessary to provide to the lamp. On the basis of this comparison logic signals are produced which are utilized to control the power switches of the inverter which controls the lamp.

Self-oscillating circuit for driving a gas discharge lamp, particularly

The device includes a circuit for generating signals indicative of a reference current which is variable in steps and, during successive time intervals defined by a clock-signal generator, decreases according to respective predetermined functions as the voltage detected across the lamp increases, these functions corresponding substantially to respective predefined constant values of the power supplied to the lamp, and a differential comparator circuit which compares the values of the reference current generated with the current detected in the lamp and generates an error signal in dependence on the difference between them. The error signal can be used to control the device for supplying the lamp.

Device for controlling a gas-discharge lamp for use in a motor vehicle

Growing community of inventors

Turin, Italy

Andrea Nepote