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The Nissan KR engine family consists of three and four-cylinder all-aluminum turbocharged gasoline engines in both 12-valve and 16-valve versions with a variable compression ratio and variable valve timing developed by Nissan.

Nissan KR engine
Overview
ManufacturerNissan
Production2018–present
Layout
Configuration
  • I3 (KR15DDT and KH5T)
  • I4 (KR20DDET)
Displacement
  • 1,461 cc (1.5 L; 89.2 cu in) (KH5T)
  • 1,497 cc (1.5 L; 91.4 cu in) (KR15DDT)
  • 1,997 cc (2.0 L; 121.9 cu in) (KR20DDET)
Cylinder bore84 mm (3.31 in) (permanent)
Piston stroke
  • 90.1 mm (3.55 in) (8.0:1 compression)
  • 88.9 mm (3.50 in) (14.0:1 compression)
Block materialAluminum alloy
Head materialAluminum alloy
ValvetrainDOHC 4 valves per cylinder with VVT
Compression ratio8.0:1~14.0:1
Combustion
TurbochargerYes
Fuel system
  • Direct-injection (GDI) (KR15DDT)
  • Combined GDI and multi-point indirect injection (KR20DDET)
Fuel typeGasoline
Cooling systemWater-cooled
Output
Power output
  • 157 hp (159 PS; 117 kW) (KH5T)
  • 201 hp (204 PS; 150 kW) (KR15DDT)
  • 248–268 hp (251–272 PS; 185–200 kW) at 5,600 rpm (KR20DDET)
Torque output
  • 240 N⋅m (177 lb⋅ft) (KH5T)
  • 305 N⋅m (225 lb⋅ft) (KR15DDT)
  • 370–380 N⋅m (273–280 lb⋅ft) at 1,600–4,800 rpm (KR20DDET)
Chronology
Predecessor
  • QR25DE (KR15DDT) (I4)
  • PR25DD ("KR15DDT") (I4)
  • VQ35DE (KR20DDET) (V6)

KH5T


The KH5T is a 1.5 L (1461 cc) DIG-T (Direct Injection Gasoline-Turbocharged) inline-3 12-valve engine, with a bore x stroke of 79.7 mm × 81.1 mm (3.14 in × 3.19 in).[clarification needed]. Power output is 157 bhp (159 PS; 117 kW) and 240 N⋅m (177 lb⋅ft) of torque.The variation in compression ratio ranges between 8:1 and 14:1. This is achieved by the movement of an actuator which changes the length of the piston stroke according to the demand for power.

Applications:


KR15DDT


The KR15DDT 3 cylinder engine is firstly introduced in the fourth-generation X-Trail.[1]

Applications:


KR20DDET


The KR20DDET was announced at the 2016 Paris Motor Show as the VC Turbo which had Nissan's new variable compression technology. The engine was introduced to Nissan's production cars in 2019 in the Infiniti QX50 and the Nissan Altima replacing the previous V6 options.[2] It was touted as the world’s first production-ready variable compression ratio engine.[3]

Applications:


See also



References





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