Mazda - 1.5 SkyActive-D

[Jack.Torrance]

molto compatto (vedi scelta dell'intercooler aria/liquido).

curioso di vedere la scheda tecnica completa.

Infatti pare bello compatto.

Ma è derivato dal 2.2?

[poliziottesco]

Nella scheda technica parlato di un turbo piccolo ed uno più grande...anche se in realta' potrebbe essere che stressors parlando skyActive in generale

[Matteo B.]

Infatti pare bello compatto.

Ma è derivato dal 2.2?

molto difficile. mi pare nettamente più compatto. dovrebbe essere vicino al 2.2 come concetti di base.

purtroppo hanno svelato poco o nula....per esempio, volevo vedere se aveva i contralberi, un dato ufficiale sull'R.D.C, alesaggio, corsa....

[owluca]

Mazda al salone di Ginevra 2014 - Autopareri

"Mechanics Porn"

[J-Gian]

Nella scheda technica parlato di un turbo piccolo ed uno più grande...anche se in realta' potrebbe essere che stressors parlando skyActive in generale

Credo di si, almeno che non sia prevista anche una versione biturbo... Ma non credo

[BrettSinclair]

Io potrei pensare ad una dieselizzazione del 1.5 Skyactive benzina...come x il 2.2 ......bohhh!!!

[J-Gian]

Io potrei pensare ad una dieselizzazione del 1.5 Skyactive benzina...come x il 2.2 ......bohhh!!!

Da quello che ho visto i benzina ed i diesel non sono così uguali

Piuttosto, fra i rispettivi carburanti si somigliano un sacco, vedi 1.5, 2.0 e 2.5... Sono praticamente tutti uguali a questo:

Mentre i diesel 1.5 e 2.2 a loro volta si somigliano a livello di basamento, supporti, disposizione accessori. Ad esempio nell'ordine abbiamo 1.5 D e 2.2 D:

[Matteo B.]

mazda stamattina ha diffuso qualche dato in più sul suo nuovo 1.5 diesel. confermato su Mazda2 (credo che qualche teaser sia dietro l'angolo....)

1 solo turbo, a geom variabile...meno giri del 2.2..il range di potenza e coppia è quello che mi aspettavo

HIROSHIMA, Japan—Mazda Motor Corporation has announced that the upcoming all-new Mazda2 (known as Demio in Japan) will feature the SKYACTIV-D 1.5, a newly developed 1.5-liter clean diesel engine making use of the company's next-generation SKYACTIV technology.

Similarly to the next generation SKYACTIV-D 2.2 clean diesel engine available in models such as the Mazda CX-5, the SKYACTIV-D 1.5 was developed in the pursuit of ideal combustion despite a very low compression ratio. As a result, the engine boasts outstanding dynamic performance, including torque equal to a 2.5-liter gasoline engine and linear acceleration all the way up the RPM range. It also features excellent environmental performance without resorting to expensive NOx aftertreatment systems.

Inheriting numerous innovative technologies from the SKYACTIV-D 2.2, additional advances were made to the SKYACTIV-D 1.5 to further enhance the engine and make it suitable for subcompact vehicles. Additional technologies include an expanded homogenous lean burn range, further reduction in mechanical resistance, and insulation technology to curb the increase in cooling loss associated with a smaller engine size.

The all-new Mazda2 featuring the SKYACTIV-D 1.5 clean diesel engine will be introduced to the Japanese market where it will meet Japan's Post New Long-term Emissions Regulations^*1 as a diesel-powered compact car. Combined with Mazda's i-stop idling stop technology, i-ELOOP brake energy regeneration system, and high-efficiency SKYACTIV-DRIVE automatic transmission or SKYACTIV-MT manual transmission, the SKYACTIV-D 1.5 will ensure the all-new Mazda2 achieve among the highest level test mode^*2 fuel economy figures for a vehicle powered solely by combustion engine in registered vehicles excluding hybrid and micro-mini vehicles in Japan, as well as drastically improved practical fuel economy. It is another example of how Mazda is implementing its long-term vision for technology development, Sustainable Zoom-Zoom, which promises to deliver all Mazda customers both driving pleasure and outstanding environmental and safety performance.

SKYACTIV-D 1.5 clean diesel engine

Key features of the SKYACTIV-D 1.5

• Development pursued ideal combustion efficiency despite the lowest compression ratio of any small displacement diesel engine—14.8:1^*3.
  
• Cooling loss is suppressed by combustion mode transition control technology, and high dispersion solenoid injectors^*4 which, along with stepped egg-shaped pistons^*4, help to reduce contact between the flame and chamber wall.
  
• The range of homogeneous lean burn is extended through the adoption of high-pressure EGR and low pressure EGR systems^*4, resulting in improved fuel economy, environmental performance and performance feel.
  
• Engine cooling system features cooling water control valves (CCV)^*4 and water jacket spacers^*4 for improved combustion efficiency and reduced mechanical resistance.
  
• Variable turbine geometry turbocharger with rotation sensor^*4 delivers plentiful boost pressure from low through to high engine speeds.
  
• Water-cooled intercooler integrated into the intake manifold^*4 improves acceleration response and turbocharger efficiency.
  
• Outstanding environmental performance to meet Japan's Post New Long-term regulations and Euro6 emission standards without an expensive NOx aftertreatment system.^*1
  

Key specifications of SKYACTIV-D 1.5 (Mazda in-house measurements)

In-line four-cylinder direct injection 1.5-liter diesel engine

[TABLE=class: noneborder_table]

[TR]

[TD]Engine displacement:[/TD]

[TD]1.497 Liters[/TD]

[/TR]

[TR]

[TD]Bore x Stroke:[/TD]

[TD]76.0mm x 82.5 mm[/TD]

[/TR]

[TR]

[TD]Compression ratio:[/TD]

[TD]14.8:1[/TD]

[/TR]

[TR]

[TD]Max. output (net):[/TD]

[TD]77kW [105PS]^*5/4,000rpm[/TD]

[/TR]

[TR]

[TD]Max. torque (net):[/TD]

[TD]250Nm [25.5kgf-m]^*5/1,500-2,500rpm[/TD]

[/TR]

[/TABLE]

• *1 Based on Mazda in-house measurements
  
• *2 Under Japan's JC08 test mode cycle
  
• *3 Among 2-liter engines or smaller, as of June 1, 2014, Mazda data
  
• *4 Technologies new with the SKYACTIV-D 1.5
  
• *5 Figures in brackets are the figures in old units
  

Modificato 10 Giugno 2014 da Matteo B.

[Beckervdo]

Non mi piace l'idea dell'EGR di alta e bassa pressione, ma d'altronde non si poteva fare altrimenti con uin singolo turbo.

[Matteo B.]

Non mi piace l'idea dell'EGR di alta e bassa pressione, ma d'altronde non si poteva fare altrimenti con uin singolo turbo.

il RDC è più alto che nel 2.2 (14.8:1 contro 14:1) avvalora il fatto che il 2.2 col monoturbo non funzionerebbe correttamente.