From Wikipedia, the free encyclopedia
| Nissan VR engine | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 |
|||||||||||||||
| Overview | |||||||||||||||
| Manufacturer | Nissan | ||||||||||||||
| Production | 2007–present | ||||||||||||||
| Combustion chamber | |||||||||||||||
| Configuration | DOHC 60° V6 | ||||||||||||||
| Chronology | |||||||||||||||
| Predecessor | RB26DETT | ||||||||||||||
The VR is a 3.8 L twin-turbo DOHC V6 automobile engine from Nissan. An evolution of the widely successful VQ series, it draws on developments from the VRH JGTC and Nissan R390 GT1 Le Mans racing engines.
Designated the VR38DETT by Nissan, the engine is currently used in the 2007–present Nissan GT-Rand the limited production Nissan Juke-R.
The VR38DETT sports 24 valves controlled by dual overhead camshafts (the total 4 cams for the both overheads) with variable valve timing (intake only). The block is cast aluminum with 0.15 mm (0.006 in) plasma-sprayed cylinder liner bores. This coating provides a hard protective layer for the piston rings to slide on as the piston moves up and down during their cycles. The turbine housings for the two IHI turbochargers are integrated into the exhaust manifolds to decrease weight and bolster vehicle balance. The engine also sports a pressurized lubrication system controlled thermostatically. The VR38DETT is equipped with a feedback control system that changes air fuel ratio depending on the engine load which has a significant effect on reducing the fuel consumption.
The VR38DETT is hand assembled in a special clean-room environment at Nissan's Tochigi facility by specially trained technicians.
No comments:
Post a Comment