Improved fuel-air ratio controls and advanced spark timing enhance efficiency in spark-ignition engines.
Phase I of the study investigated the emission-criticality of original equipment installed by the engine or vehicle manufacturers. U.S. Environmental Protection Agency (.gov) ENGINES & TRANSMISSIONS V0.1.2.32S 1.46
Internal combustion engines generate power by burning a fuel-air mixture in an enclosed space, creating high pressure that pushes a piston down, which in turn rotates a crankshaft. Improved fuel-air ratio controls and advanced spark timing
Transfers power to the wheels.
Trends include reducing weight and installation space while increasing service life and reducing costs. Advanced Technology & Reliability Environmental Protection Agency (
These engines compress only air (or air combined with exhaust gases) during the intake stroke to achieve high efficiency and compression.
Two-speed final drives and computer-based controls are used to optimize drivetrain efficiency in real time.
