WASHINGTON (Reuters) - Volkswagen AG has agreed to pay more than $200 million into a fund created to cut diesel pollution, part of its agreement over about 80,000 3.0-liter diesel vehicles that emitted more than the U.S. legal limit, a person briefed on the settlement told Reuters.

A Volkswagen logo is pictured at the newly opened Volkswagen factory in Wrzesnia, Poland, September 9, 2016. REUTERS/Kacper Pempel/File Photo

The agreement is expected to be announced as early as Monday, and is in addition to $2.7 billion that VW previously agreed to pay to offset emissions from about 475,000 2.0-liter diesel vehicles.

On Friday, U.S. District Judge Charles Breyer, at a hearing that had been delayed for several hours for additional negotiations, said the parties have made “substantial progress and I am optimistic that there will be a resolution.”

Breyer gave the sides until Monday to report whether they can reach a final agreement on resolving the fate of the 3.0-liter vehicles.

A sticking point over a comprehensive deal has been how much VW will agree to offer owners in compensation for getting vehicles repaired or selling them back. Talks among Volkswagen, the U.S. Federal Trade Commission and lawyers for the suing owners have gone on for weeks.

Reuters reported on Nov. 15 that Volkswagen had reached agreement with U.S. regulators for a mix of buybacks and fixes for the 80,000 polluting Audi, Porsche and VW 3.0-liter vehicles. The agreement includes a buy-back offer for about 20,000 older Audi and VW SUVs and a software fix for 60,000 newer Porsche, Audi and VW cars and SUVs, the sources said.

A separate, more complex fix is expected to be offered for the older vehicles.

Volkswagen in June agreed to put $2.7 billion over three years into a trust fund created to cut diesel pollution. The additional $200 million will be added. States can use the money to replace and scrap or retrofit older vehicles with new models equipped with better exhaust cleaning technology.

For example, school systems driving buses 10 years old or older could get Volkswagen money to buy new models. Other eligible vehicles include tugboats, ferries, freight switchers, transit buses, medium and heavy duty trucks, airport ground support vehicles and ocean going vessels, according to settlement documents.

Older diesel engines emit air pollutants linked to a range of serious health problems including asthma, lung and heart disease, other respiratory ailments, and premature death, the Environmental Protection Agency said.

With the $200 million to offset 3.0-liter emissions, Volkswagen has agreed to spend up to $16.7 billion to resolve U.S. diesel emissions cheating allegations. Volkswagen is also expected to face billions in fines as part of a separate potential settlement with the Justice Department to resolve an ongoing criminal investigation and a civil suit alleging civil violations of the Clean Air Act.

In June, VW agreed spend up to $10.03 billion and offered to buy back 475,000 2.0-liter vehicles and offer compensation of $5,100 to $10,000 per owner. VW began buying back vehicles last month.

The 2.0-liter diesel vehicles have software that allowed them to evade emissions rules in testing and emit up to 40 times the legally allowable emissions in onroad driving. The 3.0-liter vehicles have an undeclared auxiliary emissions system that allowed them to emit up to nine times allowable limits.

VW has been barred since late 2015 from selling any U.S. diesels and has not said if it will resume diesel sales.