Nissan QR engine
Nissan QR engine | |
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A Nissan QR25DE Engine | |
Overview | |
Manufacturer | Nissan (Nissan Machinery) |
Production | 2000–present |
Layout | |
Configuration | Inline-four |
Displacement | 2.0–2.5 L (1,998–2,488 cc) |
Cylinder bore | 89 mm (3.5 in) |
Piston stroke | 80.3 mm (3.16 in) 100 mm (3.94 in) |
Cylinder block material | Aluminum |
Cylinder head material | Aluminum |
Valvetrain | DOHC 4 valves x cyl. with VVT |
Compression ratio | 9.1:1-10.5:1 |
Combustion | |
Supercharger | On QR25DER only |
Fuel system | Port Fuel Injection or Direct Fuel Injection |
Fuel type | Gasoline |
Cooling system | Water-cooled |
Output | |
Power output | 103–186 kW (140–253 PS; 138–250 hp) |
Torque output | 200–330 N⋅m (148–243 lb⋅ft) |
Chronology | |
Predecessor | Nissan SR engine Nissan KA engine |
The QR family of inline-four piston engines by Nissan were introduced in 2000 and range from 2.0 to 2.5 L (1,998 to 2,488 cc) in displacement. These motors are aluminum, dual overhead camshaft (DOHC), four-valve designs with variable valve timing and optional direct injection. The engine shares much of its architecture with the YD diesel engine.
QR20DE
The 2.0 L (1,998 cc) QR20DE produces 140 PS (103 kW; 138 hp) at 6000 rpm and 200 N⋅m (148 lb⋅ft) at 4000 rpm. The bore and stroke is 89 mm × 80.3 mm (3.50 in × 3.16 in) and a compression ratio of 9.9:1.[1] The QR20DE was replaced with the MR20DE engine in most applications in early 2005.
Vehicle applications:
- 2001-2007 Nissan X-Trail T30, 140 PS (103 kW)
- 2001-2007 Nissan Primera P12
- 2002–present Nissan Serena C24, 145 PS (107 kW)
- 2003-2008 Nissan Teana J31, 145 PS (107 kW)
- 2001-2005 Nissan Wingroad Y11
- 2002-2005 Nissan Avenir W11
- 2001-2004 Nissan Prairie M12
- 2007-2020 Nissan Atlas F24
- 2014-present Nissan Urvan E26
QR20DD
The QR20DD is similar to the QR20DE but features NEO direct injection to improve fuel economy and to reduce emissions.[1] It produces 150 PS (110 kW; 148 hp) at 6000 rpm and 200 N⋅m (148 lb⋅ft) at 4400 rpm.[1]
Vehicle applications:
- 2000-2004 Nissan Bluebird Sylphy
QR25DE
The QR25DE is a 2.5 L (2,488 cc) variant built with cast steel connecting rods, a steel timing chain, counter-rotating balance shafts, and an aluminum intake manifold. The engine bore and stroke is 89 mm × 100 mm (3.50 in × 3.94 in) and a compression ratio ranging from 9.5:1 to 10.5:1 depending on the vehicle.[2]
Output is rated 175 hp (130 kW; 177 PS) at 6000 rpm with 244 N⋅m (180 lb⋅ft) of torque at 4000 rpm in the Altima 2.5 and Sentra SE-R models. The Sentra SE-R Spec V originally claimed 180 hp, but this was adjusted downward to 175 once production started in late 2001.[3] The redline is 6100 rpm.[3] Altimas that are PZEV compliant create 170 hp (127 kW; 172 PS) and 175 lb⋅ft (237 N⋅m) of torque.[2] In the 2005+ Nissan Frontier the QR25DE generates 152 hp (113 kW; 154 PS) and 171 lb⋅ft (232 N⋅m) of torque.[3]
2007+ QR25DE
The revised QR25DE found in the 2007+ Sentra, Altima, Rogue, etc. has a number of improvements over the older QR25DE. These include:
- A simpler, larger diameter single path resin intake manifold replaced the old dual path design. (Note: California emissions models do have a swirl control valve located in the intake)
- Revised piston crown shape to support a higher compression ratio of 9.6:1.(10.5:1 in Sentra SE-R Spec V.)
- The balancer system has been moved back slightly from the crank pulley to a more centric location in the block.
- Revised cam shaft profile.
- Reinforced connecting rods only available in the Sentra SE-R Spec V 2007-2012 .
- Reduced friction likely through Nissan's extensive use of coatings on pistons, journal bearings, etc.
- Additional engine mount on the top of the motor, pulley side.
- Higher rev limit and improved power output.
- 1999–2003 Nissan Bassara- 165 hp (123 kW; 167 PS)
- 2001–2005 Nissan Serena C24- 158 hp (118 kW; 160 PS)
- 2001–2007 Nissan X-Trail T30 APEC export version- 178 hp (133 kW; 180 PS)
- 2002–2006 Nissan Sentra SE-R- 165 hp (123 kW; 167 PS) & SE-R Spec V- 175 hp (130 kW; 177 PS)
- 2002–2009 Nissan Presage- 165 hp (123 kW; 167 PS)
- 2002–2020 Nissan Altima 170 hp (127 kW; 172 PS) to 182 hp (136 kW; 185 PS)
- 2003–2005 Nissan Teana- 160 hp (119 kW; 162 PS)
- 2003–present Nissan Murano (Japan)
- 2005–2019 Nissan Frontier- 152 hp (113 kW; 154 PS)
- 2007–2012 Nissan Sentra SE-R- 177 hp (132 kW; 179 PS) & SE-R Spec V- 200 hp (149 kW; 203 PS)
- 2007–2011 Nissan Altima Hybrid 158 hp (118 kW; 160 PS), combined 198 hp (148 kW; 201 PS)
- 2007–present Nissan X-Trail T31- 169 hp (126 kW; 171 PS)
- 2007–present Renault Koleos TR25- 169 hp (126 kW; 171 PS)
- 2008–2020 Nissan Rogue- 170 hp (127 kW; 172 PS)
- 2009–2012 Suzuki Equator- 152 hp (113 kW; 154 PS)
- 2010–present Nissan Elgrand E52
- 2013–present Nissan Teana- 165 hp (123 kW; 167 PS)
- 2013–present Nissan X-Trail T32- 169 hp (126 kW; 171 PS)
- 2014-present Nissan Urvan E26
- 2018–present Nissan Terra- 180 hp (134 kW; 182 PS)165 hp (123 kW; 167 PS)
- 2020–present Nissan X-Terra-
QR25DD
The QR25DD is similar to the QR25DE but increases the compression ratio to 10.5:1 and includes direct injection. This engine is also the first QR to use DLC coating on the valve lifter buckets for reduced friction. It produces 125 kW (170 PS; 168 hp) at 5600 rpm and 245 N⋅m (181 lb⋅ft) at 4000 rpm.[1]
Vehicle applications:
- 2002-2006 Nissan Primera P12 (JDM)
QR25DER
The QR25DER is similar to the QR25DE but has a supercharger for increased power and is coupled with a 15 kW (20 hp) electric motor, Dual Clutch System, and lithium-ion battery for increased fuel efficiency. The engine has a compression ratio of 9.1:1 (10.0:1 in 2014 Infiniti QX70[4]) and produces a combined 250 hp (186 kW; 253 PS) at 5600 rpm and 243 lb⋅ft (329 N⋅m) at 3600 rpm.[5]
Vehicle applications:
- 2014 - 2015 Nissan Pathfinder Hybrid
- 2016 only Nissan Murano Hybrid
- 2014 - 2017 Infiniti QX60 Hybrid
See also
References
- ^ a b c Yamaguchi, Jack. "Two midsize Nissans for Japan and Europe". SAE International. Archived from the original on 2004-06-25.
- ^ "2006 Altima Specifications". NissanNewS. Nissan North America. Archived from the original on 2006-12-13.
- ^ a b Jacquot, Josh (December 2001). "Road Tests: 2002 Nissan Sentra SE-R Spec V: Round Two. Ding". SportCompactCar. Primedia. Archived from the original on 2006-12-29.
- ^ Infiniti QX70 (Electronic Service Manual), Nissan North America, 2014, p. EM-154
- ^ "2014 Nissan Pathfinder Hybrid Specifications". Nissan Online Newsroom. Nissan Canada. Archived from the original on 2014-04-26.
General references
- "2007 Nissan Altima overview"
- "2007 Nissan Altima specifications"
- "2006 Nissan Frontier specifications
- "2006 Nissan Sentra specifications"
- "NTB03070 Nissan technical service bulletin regarding engine precatalyst failure"
- "NTB06045 Nissan technical service bulletin regarding low oil levels"
- "NTB05058 Nissan technical service bulletin regarding power valve screws"
- "Technobabble: December 2001 by Dave Coleman, "SportCompactCar", December 2001, retrieved June 26, 2006
External links
- "B15U.com - A Nissan Sentra Forum"
- "B15sentra.net - Another Nissan Forum for both B15 and B16 Sentras."
- "AllSentra.com - A Forum for all Sentras"
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