HOSE AS 5043787 - Caterpillar

Illustration 1 g03780925
In-line engines
(1) Electrohydraulic actuator
(2) Air choke
Illustration 2 g03584721
Vee engines
(1) Electrohydraulic actuator
(2) Air choke Electrohydraulic actuator (1) receives an electronic command signal from the Electronic Control Module (ECM). The signal is based on the exhaust port temperatures. The signal causes electrohydraulic actuator (1) to move linkage (2) in order to operate the air choke. Movement of the air choke plate controls the flow of inlet air from the turbocharger to the aftercooler.At full load and full speed, the air choke is in the fully open position. The fully open position reduces the restriction of the air flow. The engine efficiency is improved.As engine load decreases, the air choke begins to restrict air flow. This maintains a sufficiently rich air/fuel mixture for combustion at lighter engine loads.