A、can’t be controlled very precisely
B、can’t be controlled as flexibly as the separate pump system
C、can be controlled as flexibly as the separate pump system
D、can be controlled more precisely and flexibly
更多“A common rail engine has only one or two high pressure pumps in operation at the same（）time, and the injection into each cylinder.”相关的问题
A、A common rail engine；conventional engines B、A conventional engine；common rail engines C、A marine diesel engine；most other engines D、A two-stroke engine；four-stroke engines
A、stored in a common fuel line B、pumped by the injection pump C、at low pressure D、already atomized
A、fluctuates with the engine speed to some extent, independent of the engine speed B、keeps constant at all engine speed, dependent on the engine speed to some extent C、keeps constant at all engine speed, independent of the engine speed D、is decided by the engine speed, constant at all engine speed
A、Between；more commonly B、Among；the most commonly C、Between；not more commonly D、Among；not the most commonly
A、at high speed and full load B、at low speed and part load C、when heavy fuel oil is used at sea D、when the ships run long distance
A、by injection pumps B、at a time decided by the injection pump timing C、by a signal opening the magnetic valves D、at a time decided by the cam directly
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