IEEE Consumer Electronics Magazine - March/April 2023 - 124

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FIGURE 3. Acceleration test at a ¼ 60%.
FIGURE 1. Engine dynamic loading and deloading
performance test process. (a) Throttle rate of
change, (b) speed.
The engine speed increase step is 25 r/min, the
throttle opening change rate is 25%/s, 50%/s, 100%/
s, 150%/s, and 200%/s, using the system dynamic
test mode, setting the sampling frequency of the
throttle opening and turn OFF 100 Hz or more, and
measure the speed and torque of the sampling frequency
above 100 Hz. The three frequencies are
preferably equal, which is good for data processing.
The dynamic throttle valve and load rejection
performance test when the engine throttle opening
change rate is 100%/s are shown in Figure 1.
The engine throttle valve opening rate change
rate and the different speed torque output test
can be tested.
Experimental Analysis of Dynamic Acceleration
and Deceleration Performance of Intelligent
Vehicle Engine
Accelerated Performance Test In one test,
the engine dynamic acceleration/deceleration
performance test at a certain variable rate can be
completed at the same time, and the engine
throttle opening is increased from 10% to 90% in
10% steps. The acceleration performance test is
the torque output when the engine maintains the
throttle opening and increases the speed at different
variable speeds. During the test, the throttle
opening of the engine was controlled, and the
engine speed controlled by the dynamometer
was linearly increased from 1500 to 4000 r/min in
a certain period of time, as shown in Figure 2 and
Figure 3. Acceleration test results for engine
throttle opening at 30% and 60%, respectively.
It can be seen from the test results that when
the throttle opening degree is a ¼ 30%, the torque
output value of the same working condition
point of the engine is lower than the steady-state
torque output value; when the throttle opening
degree a > 30%, the engine speed change rate is
at 100 and 200 rpm/s, the torque output value is
higher than the steady-state torque output value
or has little difference from the steady-state torque
output value.
Deceleration Performance Test The deceleration
performance test is to maintain the
engine throttle opening and reduce the torque
output of the engine at different speeds. During
the test, the engine controls the throttle
FIGURE 2. Acceleration test at a ¼ 30%.
FIGURE 4. Deceleration test at a ¼ 30%.
124
IEEE Consumer Electronics Magazine

IEEE Consumer Electronics Magazine - March/April 2023

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