Nissan KR engine#KR20DDET
{{more citations needed|date=March 2021}}
{{Use American English|date=March 2021}}
{{Infobox automobile engine
| name = Nissan KR engine
| image = KR20DDET.jpg
| caption = KR20DDET engine in a 2020 Infiniti QX50
| manufacturer = Nissan
| production = 2018–present
| configuration = {{unbulleted list
| I3 (KR15DDT and KH5T)
| I4 (KR20DDET)
}}
| block = Aluminum alloy
| head = Aluminum alloy
| displacement = {{unbulleted list
| {{convert|1461|cc|L cuin|1|abbr=on|lk=on}} (KH5T)
| {{convert|1497|cc|L cuin|1|abbr=on|lk=on}} (KR15DDT)
| {{convert|1997|cc|L cuin|1|abbr=on}} (KR20DDET)
}}
| bore = {{convert|84|mm|2|abbr=on|lk=on}} (permanent)
| stroke = {{unbulleted list
| {{convert|90.1|mm|2|abbr=on}} (8.0:1 compression)
| {{convert|88.9|mm|in|2|abbr=on}} (14.0:1 compression)
}}
| valvetrain = DOHC 4 valves per cylinder with VVT
| turbocharger = Yes
| coolingsystem = Water-cooled
| fuelsystem = {{unbulleted list
| Direct-injection (GDI) (KR15DDT)
| Combined GDI and multi-point indirect injection (KR20DDET)
}}
| fueltype = Gasoline
| compression = 8.0:1{{en dash}}14.0:1
| power = {{Plainlist|
- {{convert|157|hp|PS kW|0|abbr=on|lk=on}} (KH5T)
- {{convert|201|hp|PS kW|0|abbr=on}} (KR15DDT)
- {{convert|241|–|268|hp|PS kW|0|abbr=on}} (KR20DDET)
}}
| torque = {{Plainlist|
- {{convert|177|lbft|Nm|0|abbr=on|lk=on|order=flip}} (KH5T)
- {{convert|225|lbft|Nm|0|abbr=on|order=flip}} (KR15DDT)
- {{convert|260|–|286|lbft|Nm|0|abbr=on|order=flip}} (KR20DDET)
}}
| predecessor = {{Plainlist|
}}
}}
The Nissan KR engine family consists of three and four-cylinder all-aluminium turbocharged gasoline engines in both 12-valve and 16-valve versions with a variable compression ratio and variable valve timing developed by Nissan.
KH5T
{{Original research|date=February 2021|part=section}}
The KH5T is a {{convert|1461|cc|L|1|abbr=on|comma=5|order=flip}} DIG-T (Direct Injection Gasoline-Turbocharged) inline-3 12-valve engine, with a bore x stroke of {{convert|79.7x81.1|mm|2|abbr=on}}.{{Clarify|reason=Identical bore x stroke with the MR16DDT?|date=February 2021}}. Power output is {{cvt|160|PS|kW hp|0}} and {{cvt|240|Nm|lbft|0}} 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.{{Cite web |date=2024-03-14 |title=2024 Nissan Qashqai e-Power review |url=https://www.carexpert.com.au/car-reviews/2024-nissan-qashqai-e-power-review |access-date=2024-11-11 |website=CarExpert |language=en}}
Applications:
- 2022–present Nissan Qashqai e-Power {{cvt|190|PS|kW hp|0}}, {{cvt|330|Nm|lbft|0}}
KR15DDT
File:NISSAN KR15DDT E-POWER ENGINE.jpg
The KR15DDT VC-Turbo 3 cylinder engine was introduced in the fourth-generation X-Trail.{{Cite web|url=http://news.cheshi.com/dujia/20210415/3329076.shtml|title=东风日产全新奇骏首发！ 颜值更高-换新1.5T发动机_新车-网上车市}} The "VC" designation in the name indicates that the engine uses a variable compression ratio, allowing operating modes modes for both high power output and high fuel efficiency. The engine won Nissan its 19th trophy in the Wards 10 Best Engines and Propulsion systems awards of 2022; judge Drew Winter described it as “Very smooth, exceptionally quiet during idle, pleasant to drive in traffic or on the highway”, among other comments from judges such as “This engine inspires words that never have been uttered in the same sentence as 3-cylinder engine”.
Applications:
- 2021–present Nissan Rogue/X-Trail (T33) {{Convert|201|hp|kW PS|abbr=unit}} @5600rpm, {{Convert|225|lbft|Nm|abbr=unit}} @2800rpm
KR20DDET
[[File:NISSAN VC-TURBO KR20DDET ENGINE (2).jpg|thumb|left|KR20DDET engine in a Nissan Pathfinder (R53) China Version
]]
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.{{Cite web|url=https://www.sae.org/news/2018/05/2019-infiniti-qx-50-w-vc-turbo-review|title = Nissan's new VCR engine: Worth the effort?}} It was touted as the world's first production-ready variable compression ratio engine.{{Cite web|title=Infiniti reveals world's first market-ready variable compression ratio engine |url=https://www.caradvice.com.au/470228/infiniti-reveals-worlds-first-market-ready-variable-compression-ratio-engine/|access-date=2021-04-10|website=CarAdvice.com|language=en}}
Applications:
- 2017–present Infiniti QX50 (J55) {{Convert|268|hp|kW PS|abbr=unit}} @5600rpm, {{Convert|268|hp|kW PS|abbr=unit}} @4400rpm
- 2021–present Infiniti QX55 (J55) {{Convert|268|hp|kW PS|abbr=unit}} @5600rpm, {{Convert|268|hp|kW PS|abbr=unit}} @4400rpm
- 2022–present Infiniti QX60 (L51) {{Convert|268|hp|kW PS|abbr=unit}}, {{Convert|286|lbft|Nm|abbr=unit}}{{Cite web|url=https://global.infinitinews.com/en/releases/release-df1635619cfc59661643976bfe0da8f8|title=All-new INFINITI QX60 makes global debut, exclusive China-assembled model coming later this year|date=24 June 2021}}{{cite news |last=Anderson |first=Brad |date=2024-07-19 |title=2025 Infiniti QX60 Ditches V6 For Turbo Four |url=https://www.carscoops.com/2024/07/2025-infiniti-qx60-gets-black-edition-and-variable-compression-2-0-liter/ |website=Carscoops |publisher=Carscoops |location=US |access-date=2024-07-19}}
- 2023–present Nissan Pathfinder (R53) (China)
- 2019–2024 Nissan Altima (L34) {{Convert|248|hp|kW PS|abbr=unit}} @5600rpm, {{Convert|280.|lbft|Nm|abbr=unit}} @1600rpm
- 2024–present Nissan Murano (Z53) {{Convert|241|hp|kW PS|abbr=unit}}, {{Convert|260.|lbft|Nm|abbr=unit}}
NHTSA investigation
On December 13, 2023, American agency NHTSA opened an investigation into customer complaints of engine failure in the Nissan's KR15DDT and KR20DDET engines, the former being used since the Nissan Rogue update in 2022. The complaints allege engine failure, loss of motive power, engine knock, or noise and/or metal chunks and shavings being found in the oil pan of vehicles with these engines.{{Cite web |title=Complete loss of motive power due to engine failure |url=https://www.nhtsa.gov/vehicle/2022/NISSAN/ROGUE/SUV/AWD#investigations/ |access-date=2024-01-08 |publisher=NHTSA |language=en}} The cause appears to be seizures and damages to the main bearings and L-links.{{Cite web |title=ODI Resume: PE23023 |url=https://static.nhtsa.gov/odi/inv/2023/INOA-PE23023-13019.pdf |access-date=2024-01-08 |publisher=NHTSA |language=en}} Nissan stated that they are attempting to address these failures by changing their manufacturing process.