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問題一覧
1
DCV are opened centered, determine if it is opened or closed
opened centered systems
2
What uses fixed displacement pumps (gear or vane)
open centered
3
Flow is constant (changes with RPM’s, but have flow even when running)
opened centered
4
Pressure is variable
opened centered, Load Sense Closed centered systems
5
Pressure relief valve is required
open centered
6
Not as fuel efficient bc system is constantly flowing oil, even when not needed
opened centered
7
Load could briefly move opposite direction
opened centered
8
Load checks are required
Load Sense systems, Open Centered Systems
9
Simple, easy, cheap
open centered
10
Pressure is constant in ____
Pressure Compensated closed centered system
11
Fuel efficient, flow approaches ZERO gpm when not needed
Pressure Compensated closed centered system
12
What system is flow variable
closed centered systems
13
What system had constant pressure
Pressure Compensated closed centered systems
14
What systems don’t need PSI relief valves
Closed Centered Systems
15
Which system does require a little bit of energy to maintain high pressure stand by
Pressure Compensated Closed centered systems
16
Which systems if has internal leaks results in hot oil
Pressure Compensated closed centered systems
17
Response time is fast, zero to full in 1/60 of a second
Load Sense Closed Centered Systems
18
Most fuel efficient of all systems .35 HP at idle
Load Sense Closed centered systems
19
Flow is dictated by the area, dictated by how far the DCV lever is stroked
closed centered systems
20
What are the 2 types of closed centered systems
Load Sense, Pressure Compensated