As shown in figure 8.1, cardiorespiratory endurance requires fitness of your heart, lungs, blood, blood vessels, and muscles. In this lesson, youâll learn how proper physical activity improves your cardiorespiratory endurance. Youâll also learn how to assess your cardiorespiratory endurance.
Exhaust gas recirculation (EGR) is a system that takes exhaust gas from a dieselâs exhaust manifold and reintroduces it into the intake of the engine to reduce the combustion chamber temperature.
EGT is an indication of how hot the combustion process is in the cylinders, and the amount of afterburning that is occurring in the exhaust manifold. EGT is also directly related to the air/fuel ratio. The richer the air/fuel ratio in a diesel, the higher the EGT will be. Two things can create a rich mixture under heavy loads or at full throttle: the first is too much fuel, and the second is not enough air.