Conditions for optimizing powertrain performance in a vehicle with an internal combustion engine
The paper analyzes vehicle structural solutions that are consistent with emission standards, modern energy efficiency norms, safety requirements and consumer expectations. Powertrain parameters in a vehicle with an internal combustion engine were selected based on the following criteria: fuel consumption, engine dynamics, and emission standards for harmful substances. A light-duty passenger vehicle with gross vehicle weight rating (GVWR) of 3.5 tons was modified by replacing a spark-ignition engine with a diesel engine. The gear ratio in the powertrain had to be modified accordingly to optimize the engine’s performance, enhance engine dynamics, minimize fuel consumption and toxic emissions. Selected powertrain parameters were optimized based on standard driving cycle requirements, speed profiles and the road gradient during tests conducted under real-world conditions.