Tenneco’s Powertrain division has revealed its all-new Megabond cylinder liner technology. The liners provide robustness for high performance and durability on engines with cast aluminum cylinder blocks.
The newly-developed technology promises to offer twice the mechanical bond strength of existing state-of-the-art liners, combined with excellent thermal conductivity, to meet the increased mechanical and thermal loads in high efficiency engines. The system is suitable for light vehicle applications of all fuel-types.
“The improved bonding and thermal conductivity provided by Megabond liners enable a broad range of benefits including reduced oil consumption, lower CO₂ emissions, improved NVH and higher engine performance,” said Gian Maria Olivetti, VP global engineering, Tenneco Powertrain.
“But most important of all, Megabond liners support outstanding durability and reliability because they are more resistant to the stresses that can cause debonding or delamination during manufacture or operation.”
Tenneco´s Megabond liners use an evolution of the company´s proven Hybrid Liner technology, which employs an aluminum/silicon alloy deposited around a cast iron liner by wire arc spray, prior to casting the aluminum block around it. The unique design creates a strong intermetallic bond between the liner and the aluminum block.
Megabond cylinder liners were initially developed to meet the requirements of next-generation engines with ultra-close bore spacing, which can place high demand on liner stability and thermal performance but constrain liner thickness.
The new liner technology was developed at the company’s technical facilities in Friedberg and Burscheid, Germany. Production is planned to commence later this year in Germany and in China.
