In order to comply with the requirements, engine manufacturers must follow strict testing procedures to demonstrate or certify that their engine or vehicle meets the engine emissions standards while operating in a specific service class (test cycle and weight restriction). An engine cannot be placed in a vehicle and operated outside its service class designation. Emission standards are set for a variety of service classes including new passenger cars (PC), light-duty trucks (LDT), medium-duty vehicles (MDV), heavy-duty engines (HDE) and vehicles (HDV) including urban buses (UB), on- and off-road motorcycles (ONMC and OFMC), all-terrain vehicles (ATV), and electric golf carts (eGC).
Non-road spark ignited engines are regulated in two different classes; large spark ignited (LSI) and small spark ignited (SSI). Our team has complied some key certification topics for both sections below. However, if you want a deeper analysis of LSI engine certification requirements our staff has developed a wonderful post on that topic which you can read here.
Large Spark Ignited Engines:
Key Topics:
- Federal sliding scale standards vs. California standards.
- Certifying engines to operate on non-commercial fuels (§1048.625)
- Developing deterioration factors vs. assigned factors (§1048.240)
- Field test standards (§1048.101(c))
- Production line testing (§1048.301)
- Diagnostic monitoring (§1048.110)
- Adjustable parameters (§1048.115(e))
- Evaporative compliance (§1048.105)
- AECD auditing
- In use testing (§1048.401)
Small Spark Ignited Engines:
Key Topics:
- Unique California Standards
- Evaporative testing and certification (§1060)
