stringtranslate.com

Honda K engine

Honda K24A4 2.4L DOHC i-VTEC Engine installed in 2003 Honda Accord

The Honda K-series engine is a line of four-cylinder four-stroke car engine introduced in 2001. The K-series engines are equipped with DOHC valvetrains and use roller rockers on the cylinder head to reduce friction. The engines use a coil-on-plug, distributorless ignition system with a coil for each spark plug. This system forgoes the use of a conventional distributor-based ignition timing system in favor of a computer-controlled system that allows the ECU to control ignition timings based on various sensor inputs. The cylinders have cast iron sleeves similar to the B- and F-series engines, as opposed to the FRM cylinders found in the H- and newer F-series engines found only in the Honda S2000.

Similar to B series, the K-series car engines have two short blocks with the same design; the only difference between them being the deck height. K20 uses the short block with a deck height of 212 mm (8.3 in) where K23 and K24 block has a deck height of 231.5 mm (9.1 in).[1]

A cylinder head from a Honda K20Z3. Components of the i-VTEC system can be seen.

Two versions of the Honda i-VTEC system can be found on a K-series engine, and both versions can come with variable timing control (VTC) on the intake cam. The VTEC system on engines like the K20A3 only operate on the intake cam; at low rpm only one intake valve is fully opened, the other opening just slightly to create a swirl effect in the combustion chamber for improved fuel atomization. At high engine speeds, both intake valves open fully to improve engine breathing. In engines such as the K20A2 found in the Acura RSX Type-S, the VTEC system operates on both the intake and exhaust valves, allowing both to benefit from multiple cam profiles. A modified K20C engine is used in motorsport, as the Sports Car Club of America Formula 3 and 4 series that run in North America both use a K20C engine, with the Formula 4 engine not having a turbocharger. These are gaining a following in the import scene, but also among hot rodders and kit car enthusiasts, because they can be put in longitudinal rear wheel drive layouts.

Another significant difference between K-series engines is the alignment of the crankshaft to the center line of the bore. The K20C1 engine block has an offset alignment.[2] Engines that do not have their crank shaft aligned to the bore are known as Desaxe engines. On the K20C1 engine this allows the power stroke to have more leverage and less thrust waste on sidewalls.

K20

K20A (i-VTEC)

Applications
Additional notes

K20A Spec R engine (FD2 Civic Type R)

K20B (i-VTEC I)

K20Z (i-VTEC)

Applications
  1. ^ SAE BHP measurement changes from 2005 to 2006. Thus, reducing the 2006 Acura RSX Type S rating from 210 hp (160 kW) to 201 hp (150 kW) on paper.
  2. ^ a b c d SAE net Rev 8/04
  3. ^ The RBC is not a variable-length intake.
Additional notes

K20Z3 (as fitted to Ariel's Atom 3.5)

K20C (Earth Dreams VTEC Turbo)

Applications
Additional notes

Applications

K23

K23A (i-VTEC Turbo)

Applications
Additional notes

K24

K24A (i-VTEC)

  1. ^ a b c d
    Automatic: 7100 rpm
    Sequential Sportshift: 7300 rpm
    Manual: 7600 rpm
  2. ^ a b 2400 rpm While in fuel efficiency mode. 4500 rpm in performance mode.
Additional notes

K24A2 and K24A3 (2006-2008 Acura TSX)[26]

  • Increased intake flow:
    • Intake valve + 1 mm oversize (Intake valve head measures 36mm, but valve seat still measures 35mm)
    • Intake cam High lift lobe with 0.9 mm more lift and 12 degrees more duration
    • Throttle body increased from 60–64 mm
    • Radius on some intake pipes increased from 70–80 mm
  • Increased exhaust flow
    • Exhaust Head pipe increased from 60–65 mm
    • Higher flow catalytic converter
    • Main (single) exhaust pipe increased from 54–57 mm
    • Rear (twin) pipes increased in diameter from 42.5 to 45 mm
  • Block improvements:
    • Additional air passages in crankcase for reduced pumping losses
  • Others
    • Stronger connecting rods
    • Under-piston oil squirters

Applications

Direct Injection, i-VTEC (intake camshaft & valvetrain)

Applications

Legacy

The Honda K-series engines have built a significant legacy, widely regarded as some of the most influential and celebrated four-cylinder engines in automotive history. The engine’s reliability and performance, coupled with its lightweight aluminium construction and chain-driven timing system, solidified its reputation as a benchmark in engine design. This engineering excellence made the K-series a revered engine amongst people, setting a new standard for four-cylinder engines. As a result, it gained widespread praise for being durable and tuneable, quickly becoming a favourite among car enthusiasts and professional tuners alike due to its potential to handle both everyday driving and high-performance applications.[36]

The K-series engine’s impact extends beyond factory specifications, with its wide adoption in the aftermarket scene. The K20 and K24 variants, in particular, are often used in engine swaps and high-performance builds due to their ability to handle and withstand significant power upgrades. This adaptability, coupled with their success in motorsports like time attack and drag racing, cemented the K-series as one of the greatest four-cylinder engines of all time.[37]

The engine remains a benchmark from its long production run to this day, continuing to influence modern engine design and tuning practices.

References

  1. ^ "Honda K-Series Engines". JDM Spec Engines. Archived from the original on 13 March 2014. Retrieved 20 May 2014.
  2. ^ "Civic Type R K20C1 Engine". Engine Builder Mag. Retrieved 23 June 2023.
  3. ^ "Honda｜ストリーム（2005年12月終了モデル）｜スペック". www.honda.co.jp. Archived from the original on 24 September 2016. Retrieved 30 March 2021.
  4. ^ "Honda｜インテグラ（2006年9月終了モデル）｜スペック". www.honda.co.jp. Archived from the original on 27 October 2017. Retrieved 30 March 2021.
  5. ^ "Honda｜ステップワゴン（2005年4月終了モデル）". www.honda.co.jp. Archived from the original on 21 June 2016. Retrieved 30 March 2021.
  6. ^ a b "Honda｜ステップワゴン スパーダ（2005年4月終了モデル）". www.honda.co.jp. Archived from the original on 23 September 2017. Retrieved 30 March 2021.
  7. ^ "Honda｜ステップ ワゴン（2006年4月終了モデル）｜スペック". www.honda.co.jp. Archived from the original on 27 December 2014. Retrieved 30 March 2021.
  8. ^ a b c d "Honda｜アコード（2008年11月終了モデル）｜スペック". www.honda.co.jp. Archived from the original on 22 June 2016. Retrieved 30 March 2021.
  9. ^ "Honda｜エディックス（2005年11月終了モデル）｜スペック". www.honda.co.jp. Archived from the original on 1 July 2016. Retrieved 30 March 2021.
  10. ^ "Honda｜シビック（2007年8月終了モデル）｜スペック". www.honda.co.jp. Archived from the original on 18 May 2017. Retrieved 30 March 2021.
  11. ^ "Technical Information RSX VTEC and VTC". Hondata. Archived from the original on 12 May 2018. Retrieved 21 April 2018.
  12. ^ "Honda K20A 2.0l DOHC i-VTEC SPEC R Engine for the new FD2 CIVIC TYPE R". Asia.vtec.net. Archived from the original on 6 February 2017. Retrieved 15 October 2018.
  13. ^ "Civic Type R K20C1 Engine". Engine Builder Mag. Retrieved 23 June 2023.
  14. ^ "Vehicle Specifications - 2018 Honda Civic Sedan - Honda Owners Site". Owners.honda.com. Archived from the original on 5 November 2018. Retrieved 15 October 2018.
  15. ^ "The 2023 HR-V has shown up at a few dealers already. What we know so far". Temple of VTEC. 6 June 2022. Retrieved 26 June 2022.
  16. ^ "2023 Honda HR-V Specifications & Features". American Honda Motor Co., Inc. 7 June 2022. Retrieved 26 June 2022.
  17. ^ "Honda│アコード（2013年3月終了モデル）│スペック". www.honda.co.jp. Archived from the original on 13 September 2016. Retrieved 30 March 2021.
  18. ^ "Honda｜オデッセイ（2007年1月終了モデル）｜スペック". www.honda.co.jp. Archived from the original on 28 July 2016. Retrieved 30 March 2021.
  19. ^ "Honda│オデッセイ（2013年9月終了モデル）│スペック". www.honda.co.jp. Archived from the original on 7 July 2018. Retrieved 30 March 2021.
  20. ^ "Honda｜エレメント（2005年5月終了モデル）". www.honda.co.jp. Archived from the original on 12 June 2017. Retrieved 30 March 2021.
  21. ^ "Honda｜エリシオン（2005年8月終了モデル）". www.honda.co.jp. Archived from the original on 13 July 2018. Retrieved 30 March 2021.
  22. ^ "Honda｜エディックス（2009年8月終了モデル）│Webカタログ│スペック（諸元表）". www.honda.co.jp. Archived from the original on 13 November 2017. Retrieved 30 March 2021.
  23. ^ "Honda｜CR-V（2006年9月終了モデル）｜スペック". www.honda.co.jp. Archived from the original on 23 April 2021. Retrieved 30 March 2021.
  24. ^ "Honda｜CR-V（2007年8月終了モデル）｜スペック". www.honda.co.jp. Archived from the original on 23 April 2021. Retrieved 30 March 2021.
  25. ^ "性能 | CR-V（2016年8月終了モデル） | Honda". www.honda.co.jp. Archived from the original on 29 July 2019. Retrieved 30 March 2021.
  26. ^ a b "2008 Acura TSX - Powertrain". acuranews.com. Archived from the original on 15 October 2018. Retrieved 15 October 2018.
  27. ^ "2012 Honda Accord Specifications and Features". Honda Automobiles Newsroom. 17 August 2011. Archived from the original on 23 April 2021. Retrieved 3 October 2020.
  28. ^ "2009 Acura TSX - Powertrain" (Press release). Torrance, CA: Acura. 20 April 2008. Retrieved 1 September 2015.
  29. ^ "Odyssey Specification List" (PDF). Honda (in Japanese). Retrieved 9 June 2023.
  30. ^ "2016 Honda ACCORD (2.4L 4 -cyl Engine Code K24W1 7) Motor Oil, Filters and Lubricants - AMSOIL". Retrieved 9 June 2023.
  31. ^ "2019 Honda CR-V (2.4L 4 -cyl Engine Code K24W9 K) Motor Oil, Filters and Lubricants - AMSOIL". Retrieved 9 June 2023.
  32. ^ "ECO sticker - Honda CR-V 2.4 EL 4WD". ECO sticker - The Office of Industrial Economics, Ministry of Industry Thailand (in Thai). Archived from the original on 27 September 2020. Retrieved 18 January 2020.
  33. ^ "Honda CR-V Catalogue" (PDF). Honda Thailand (in Thai). Retrieved 18 January 2020.
  34. ^ "Acura Set to Launch More Powerful, Technologically Advanced and Luxuriously Equipped 2016 Acura ILX Sport Sedan" (Press release). Los Angeles, CA: Acura. 20 November 2014. Archived from the original on 27 September 2020. Retrieved 23 May 2016.
  35. ^ "2017 ILX Specifications & Features". Acura. 12 April 2016. Archived from the original on 27 September 2020. Retrieved 23 May 2016.
  36. ^ Team, The Drifted (29 March 2024). "Ultimate Honda K24 Guide – Everything You Need To Know". Drifted.com. Retrieved 11 September 2024.
  37. ^ "The Bulletproof Honda K-Series: A Legacy of Reliability and Performanc". Authentic Autoclub. Retrieved 11 September 2024.

External links