An exhaust valve assembly includes a valve body supported on a shaft for
rotation within an exhaust component. The shaft is coupled to a solenoid
with a linkage assembly. A controller controls the solenoid to rotate the
shaft via the linkage assembly. The solenoid includes a plunger that
moves between an actuation position and a release position. The
controller utilizes pulse width modulation to control actuation and
release of the plunger. This significantly reduces operational noises
generated as the solenoid is moved between the actuation position and the
release position.