HONDA F1 New “RA621H” Skeleton, World Premiere Pullback Photos and New Technology Released | Sanei press release

“HONDA F1 Technology”

▶ Motorfan Illustrated Special Editing “Honda F1 Technology”

▶ Illustrated Motor Fan Official Site [ ]

  • Honda F1 completely elucidates the technological evolution of the power unit that has reached the “peak”

Honda supplied engines to McLaren, Toro Rosso/AlphaTauri and Red Bull from 2015 to 2021. Following the end of the 2021 season, the 2021 “RA621H” powertrain adopted a new skeleton ahead of schedule. This radical decision was successful and led to the acquisition of the title by Mr. Verstappen (Red Bull).

The illustrated Motor Fan special edition “Honda F1 Technology” summarizes the technological evolution of the powertrain during the seven seasons of Honda F1 (participation in the 4th season). With the full cooperation of HRD Sakura (at the time of the interview), where the Honda F1 development base is located, it is mainly composed of photographs taken for the first time in the world. Many technologies will be revealed for the first time in this magazine, and it is a coveted book not only for F1 fans but also for mecha enthusiasts.

What is a “new skeleton”? It’s obvious when you open this magazine. After all, ancient skeletons are compared side by side. For example, a cylinder block. The old skeleton until 2020 is a general aluminum casting for a racing engine, but the new skeleton is a fully machined high strength aluminum alloy. Just by looking at the photos, you can see that the texture is completely different and that it is compact. In addition, some parts from RA615H to RA620H are not RA621H, and it should be noted that there is none. Of course, I interviewed the engineers at HRD Sakura, Honda’s F1 power unit development base, and explained why it was turned into a new skeleton and completely machined.

  • 2021 evolved into quad VIS

It is also the culmination of “Honda F1 Technology” which revealed the whole picture of the variable intake system. Honda calls the Variable Intake System VIS, which is an acronym for Variable Intake System. The VIS was applied from RA615H in 2015, but at that time it was not possible to guarantee enough space for the intake system because it was summarized under the concept of “size zero”. How was the variable intake mechanism implemented in a tight space? I took a photo of the contents with the lid removed. The VIS was updated in the 2016 10 series and switched to a completely new mechanism in 2017. Based on this mechanism, in 2021 we developed a new system with the cooperation of the team to achieve a certain goal. This is called “Quad VIS”. Please check the magazine for the full picture.

The hallmark of the F1 powertrain is that it is fitted with an MGU-H assembly which incorporates a turbocharger and motor/generator. Honda’s power unit adopts the V-bank of the 1.6ℓ V6 engine, but is keen on adopting the sandwich type that sandwiches the motor/generator with the compressor at the front of the V bank and the turbine at the back. are a fan, you know. Even if I knew that, I should have asked myself “how is it stacked?”, and in this magazine, in order to answer the long-standing(?) question, I posted a picture of MGU-H alone . . . Please check the unique appearance which looks strange. From 2015 to 2021, MGU-H Assy released the whole story at once. Please feel the evolution process with the comment.

  • Regular measurements and tests that support the development of the power unit

For Honda F1 technology, we also conducted an undercover interview at HRD Sakura development site, which is the development base of Honda F1. When production improvement of more than 100 kW and high precision are required in 7 seasons, it is necessary to master the technology. We can say that it is a necessary condition to reach the top. From the new skeleton to the equipment and testing, if you take “Honda F1 technology”, how fierce technological competition is going on in F1. You should be able to see how Honda caught up to this tough world in a short time.

Illustrated special edition of the engine fan
[Technologie Honda F1]

HONDA F1 2015-2021 Power Unit Technology
─ 7 seasons of technological evolution in search of thermal efficiency and contribution to vehicle bodywork

RA621H ─ Fast and Powerful Combustion Technology ─
RA620H – RA619H – RA618H – RA617H – RA616H -RA615H

[Explication]Power supply
Achieve a production improvement of more than 100 kW in 7 seasons

[Nouveau squelette et ancien squelette]
Cylinder block / Cylinder head / Valve system / Ignition

[Mécanisme du système d’admission variable (VIS)]
2016 Rd.1〜/2016 Rd.10〜/2017 Rd.1〜/2021 Rd.1〜

Hydraulic system harness / fuel supply system / CB2 injector system / 3D printing

[Explication]Carbon neutral fuel
Introduction of a carbon neutral component in 2021

[Explication]MGU-H Assy / MGU-K
Required pressure ratio and airflow increases with greater ICE efficiency
MGU-H assembly 2021-2015

[Explication]Energy Storage System (ESS)
Honda internal cell introduced in 2021

[Explication]Energy management
A technology that makes optimal use of limited energy

Launch optimization mechanism (race start)

HRD Sakura
Regular measurements and tests that support the development of the power unit

  • Motorfan Illustrated Special Edition “Honda F1 Technology” Details

“HONDA F1 Technology”

Motorfan Illustrated Special Edition
“Honda F1 Technology”

Release date: Saturday, March 26, 2022
List price 1980 yen (main unit price 1800 yen)

*Available in bookstores and online bookstores nationwide.

【Product Details】


■ What is the motor fan shown?
A completely new type of automotive specialized news magazine with the concept “cars are more interesting when you understand technology” and the main theme is “automotive technology”. If you understand technology and engineering, you can understand engineers’ thoughts and manufacturer’s philosophy more deeply, and you can enjoy the car more. Each issue curtails themes that cannot be imitated in other magazines, and while delving into various automotive technologies, we use illustrations, photographs and perspective drawings to explore the basics and true pleasures of technology, the breath of engineers and the future. of the automotive industry. I will illustrate it in an easy to understand way.

▶ Illustrated Motor Fan Official Site [ ]

March 24, 2022
Sanei Co.,Ltd.

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