Part of Lesson Plan: **Development of Emissions Controls Devices
(updated) by Sergio Marquez Activity Overview / Details While
lecturing, students will follow along in the text book ( Thomson
Delmar Learning, "Automotive Technology: A Systems Approach,"
4th edition), pages 786-804. Start by explaining that in late
1959, California established the first standards for automotive
emissions, and in 1967, the Federal Clean Air Act was amended to
provide for federal standards that would apply to motor
vehicles. Positive Crankcase Ventilation System (PCV) The first
source of emissions to be brought under control was the blowby
in the crankcase, witch was called the Positive Crankcase
Ventilation System and designed to route crankcase vapors
(blowby) hydrocarbons (HC) and some carbon monoxide (CO) back to
the engine's intake manifold. This system was developed and
incorporated into the 1961 cars and light trucks sold in
California. These systems were installed on all cars nationwide,
beginning with the 1963 models. (