Engine makers worked on reducing diesel emissions well before the government mandated lower emission standards for heavy-duty trucks. Under “Equipment Innovations,” on OverdriveRetro, read John Baxter’s account of the 1985 innovation that Detroit Diesel undertook with its electronically controlled unit injector.
You can read about the difference it made in engine making in that piece and many other inventions that shaped the evolution of contemporary Class 8 engines and trucks.
