Although some vehicle manufacturers (OEMs) still prefer to use a traditional chain drive system, several major manufacturers, including Ford, PSA, VAG, and now GM, have adopted belt-in-oil (BIO) technology. This system delivers several benefits, particularly in weight saving, NVH performance (Noise, Vibration, and Harshness), and emissions reductions.
Dayco, the company that pioneered the development of BIO technology on behalf of the OEMs, has announced a new supply agreement. In recognition of its technical capabilities, GM has approved Dayco as the OE/OES BIO supplier for its 1.0- and 1.2-litre petrol engines produced for the LATAM (Latin America) region. Dayco is replacing the incumbent supplier due to the advanced technological level and superior performance of its belt.
Why Belt-in-Oil Technology is Necessary
Emissions reduction, noise abatement, and weight saving are key goals for OEMs, and the BIO concept is important for meeting these objectives. However, belts used in this system must operate reliably throughout the engine’s entire service life within a chemically aggressive environment, which includes prolonged exposure to engine oil, gasoline, and additives, often under contrasting global climates.
Accurately defining the real-world conditions these belts have to cope with is essential. Dayco’s engineers have developed a superior formulation that is even more resistant to chemical attack from gasoline, which was key to securing this new supply agreement with GM.
Furthermore, Dayco engineers are currently working with GM to approve the supply of the BIO system for the oil pump drive on the same 1.0- and 1.2-litre units, which further strengthens Dayco’s relationship with GM Brazil.