Advancements in Technology Elevate Car Engine Power Beyond Original Crown Restoration's Second Installment
In a remarkable feat of engineering, Toyota's Kamigo Plant/Shimoyama Plant Engine Manufacturing Engineering Division has successfully restored a first-generation Crown's engine in 2022, using cutting-edge honing techniques to overcome abnormal cylinder wear.
The honing team, led by Assistant Manager Takayuki Okada, includes skilled members such as Takuya Sato, Hiromu Nakabayashi, and Takayuki Miwa. The team's expertise and the use of state-of-the-art equipment have enabled them to bring the old engine back to life.
The restoration project faced a significant challenge due to abnormal cylinder wear. This issue was a result of poor engine cooling, leading to inadequate lubrication, and subsequent wear on the pistons and cylinders.
To address this challenge, the team employed the precision process of cylinder bore honing. This process, considered the heart of engine manufacturing, creates a micron-level precision finish on the cylindrical inner surface, ensuring the engine's optimal performance and durability.
The honing machine used in this restoration project is developed in-house at Toyota. It is equipped with a sensor serving as a torque meter, ensuring precise control during the honing process.
The honing team uses three different types of grindstones: diamond, CBN, and WA. These abrasives, combined with carefully designed patterns, allow for the removal of wear, restoration of surface finish, and optimization of the cylinder wall geometry.
Advanced engine honing techniques, such as those employed by the team, can correct uneven wear while maintaining tight dimensional tolerances. They also create a specific surface crosshatch pattern that enhances oil retention and ring sealing. Real-time measurement and feedback are used to achieve precise surface roughness and geometric accuracy.
By using modern honing technologies, older engines like the one in this restoration project can achieve previously unimaginable levels of performance, reliability, and durability. As a result, vintage cars can remain on the road, continuing to provide joy to their owners.
In this particular restoration, the restored Type R engine exceeded expectations in terms of power, demonstrating the effectiveness of Toyota's honing techniques. However, without explicit details from the search results, the specific methods used by the team at Kamigo/Shimoyama Plants in 2022 remain unclear.
This project marks another successful restoration by Toyota's honing team, further cementing their reputation as leaders in engine manufacturing and restoration. It also underscores the importance of preserving vintage vehicles through the application of modern technology and expertise.
As Toyota's Kamigo/Shimoyama Plant's honing team successfully restored a first-generation Crown's engine, they demonstrated their expertise in various industries, including automotive and technology. The team's precision honing techniques, aligned with finance, enabled them to overcome abnormal cylinder wear, enhancing the durability of the engine's transportation system.
