The port-and-helix metering pumps, used in diesel fuel injection systems, are usually designed to produce a constant beginning and a variable ending of fuel injection. These pumps are usually __________.
A
timed for port opening
B
timed for port closing
C
controlled by cam stroke
D
controlled by plunger stroke
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Question 1 / 205eccefa2bacbc34ba4d478a5
Question 1 of 205eccefa2bacbc34ba4d478a5
The port-and-helix metering pumps, used in diesel fuel injection systems, are usually designed to produce a constant beginning and a variable ending of fuel injection. These pumps are usually __________.
The port-and-helix metering pumps, used in diesel fuel injection systems, are usually designed to produce a constant beginning and a variable ending of fuel injection. These pumps are usually __________.