The Maserati Nettuno is a

twin-turbo Twin-turbo is a type of turbo layout in which two turbochargers are used to compress the intake fuel/air mixture (or intake air, in the case of a direct-injection engine). The most common layout features two identical or mirrored turbochargers in ...

port A port is a maritime facility comprising one or more wharves or loading areas, where ships load and discharge cargo and passengers. Although usually situated on a sea coast or estuary, ports can also be found far inland, such as Hamburg, Manch ...

and direct injected V6 petrol engine with prechamber ignition, designed and produced by

Maserati Maserati S.p.A. () is an Italian luxury vehicle manufacturer. Established on 1 December 1914 in Bologna, Italy, the company's headquarters are now in Modena, and its emblem is a trident. The company has been owned by Stellantis since 2021. Ma ...

in its Modena plant since 2020.

Development

The engine, an integral part of the renewal of the Modena brand, was born from the need to equip Maserati with a new generation engine, replacing the Ferrari-Maserati F136 V8 that previously equipped the cars of the

trident A trident (), () is a three- pronged spear. It is used for spear fishing and historically as a polearm. As compared to an ordinary spear, the three tines increase the chance that a fish will be struck and decrease the chance that a fish will b ...

. Starting with the MC20, the engine replaced the V8 F136 in Maserati's engine range. The new engine family is characterized by a displacement of 3.0liters, with a maximum power output ranging between in the versions approved for road use, and can reach in the configurations intended for track use.

Description

The engine represents a profound evolution of the Alfa Romeo 690T, in turn partly derived from the V8 Ferrari F154. The engine maintains the 6 cylinders with a 90-degree angle between the banks,

firing order The firing order of an internal combustion engine is the sequence of ignition for the cylinders. In a spark ignition (e.g. gasoline/petrol) engine, the firing order corresponds to the order in which the spark plugs are operated. In a diesel engi ...

of 1-6-3-4-2-5, and a

stroke Stroke is a medical condition in which poor cerebral circulation, blood flow to a part of the brain causes cell death. There are two main types of stroke: brain ischemia, ischemic, due to lack of blood flow, and intracranial hemorrhage, hemor ...

of 82 mm from the 690T. The bore, however, was increased to 88 mm, thus reaching a total displacement of 3.0liters. Similarly, the engine is equipped with two turbochargers mounted outside the banks, a configuration that realizes the so-called cold vee, as opposed to hot vee. Characterized by a high

compression ratio The compression ratio is the ratio between the maximum and minimum volume during the compression stage of the power cycle in a piston or Wankel engine. A fundamental specification for such engines, it can be measured in two different ways. Th ...

of 11 to 1, the engine is able to deliver specific powers of more than 200 hp/litre and maximum torque values above .

Combustion system

The engine is equipped with an innovative pre-chamber combustion system, called (TJI). In the pre-chamber takes place the injection and combustion of a small amount of mixture; from this combustion a turbulent jet is generated that, through special holes, reaches the main chamber, triggering the actual combustion. This process creates a very large number of ignition points in the main chamber, significantly increasing the speed of flame propagation. Thanks to this optimized and more homogeneous combustion, it is possible to use lean mixtures in the main chamber and high compression ratios, improving engine efficiency while reducing emissions. This engine is also equipped with a dual ignition spark plug system, called Maserati Twin Combustion (MTC). The first spark plug is placed inside the prechamber and is used to trigger the first combustion. The second spark plug, on the other hand, is placed sideways in the main chamber and intervenes at partial load, when the turbulent jet generated in the prechamber may find it difficult to reach the main chamber. This is the first application of this technology to a mass-produced engine. The engine is also equipped with a partial

cylinder deactivation Variable displacement is an automobile engine technology that allows the engine displacement to change, usually by deactivating cylinders, for improved fuel economy. The technology is primarily used in large multi-cylinder engines. Many automobil ...

system, which at low load allows the operation of only three cylinders, excluding the entire right bank. This system is particularly innovative, as it is not only interrupting the injection and ignition, but also deactivates the intake and exhaust cycles. In this way, the resistances associated with the movement of the pistons in cylinders where there is no combustion is significantly reduced.

Design and manufacturing

The engine was conceived and designed in Modena, between the workshops of the Tridente house, the Maserati Innovation Lab in Via Emilia Ovest, and the workshops in Via delle Nazioni, the historic headquarters of the . The development and production are instead entrusted to the Polo Motori of the Ciro Menotti plant in Viale Ciro Menotti, the same production complex where the Maserati MC20 is also assembled. The project was led by Matteo Valentini, supported by a dedicated team created specifically. The engine is composed of about 1,300 components, and its assembly, while being artisanal, follows strict parameters controlled by computerized systems.

Applications

Maserati

References

{{reflist Gasoline engines by model V6 engines Maserati engines