Belt-in-oil technology – the development continues

Although some vehicle manufacturers (OEMs) prefer to use a traditional chain drive system, several, including Ford, PSA, VAG, and now GM, have embraced belt-in-oil (BIO) technology, and the benefits it delivers, particularly when it comes to weight saving, NVH performance and emissions reductions.

Dayco, the company that pioneered BIO development on behalf of the OEMs, is therefore announcing that, in recognition of Dayco’s deep technical capabilities, GM has approved Dayco as the OE/OES BIO supplier for its 1.0 and 1.2-litre gasoline engines produced for the LATAM region; the incumbent supplier is being replaced due to the superior performance and advanced technological level of the Dayco belt.

With emissions reduction, noise abatement and weight saving as key OEM goals, the BIO concept plays an important role in delivering these objectives. However, having to function in a chemically aggressive environment throughout the engine’s entire service life, and in contrasting climates across the globe, demands precise design and enhanced materials.

Accurately defining the real world conditions these belts have to cope with is therefore essential, and Dayco’s development of a superior formulation that is even more resistant to chemical attack from prolonged exposure to gasoline and additives, has resulted in this new supply agreement with GM.

Furthermore, Dayco engineers are presently working alongside those from GM to approve the supply of the BIO system for the oil pump drive on the same 1.0 and 1.2-litre units, further cementing Dayco’s relationship with GM Brazil.