I know how to adjust fuel injection timings of MC engines.
But, In CR(Common rail engine) I don't know how to adjust it.
The only thing that I know is it is controlled by solenoid valve.

and, It is possible to control fuel injection timing on engine side? Is there any cam shaft or fuel rack in high pressure pump?

The high-pressure pump on a common-rail system does only one thing ... pressurize the fuel in the fuel rail. It has nothing to do with injection timing, it just pressurizes the rail and holds the pressure at a regulated setting.

Injection timing on a common-rail engine is done purely by controlling the timing of the pulses to the injectors, and therefore, the only way to "adjust" it is to change the mapping in the computer. It is otherwise non-adjustable. Same situation as ignition timing in newer gasoline engines with no distributors.

Volkswagen "pumpe-duse" unit injector engines are still in production for areas in the world not subject to US EPA Tier 2 or Euro 5 emission standards. But, even in those, they are electronically-controlled unit injectors, and the injection timing is regulated by the solenoid pulse from the computer.

I don't think there are any production automotive or light truck diesel engines that use anything but some variation of common-rail any more, for any place subject to the more stringent emission standards (Tier 2 or Euro 5). They are generally using multiple injections per stroke to control noise and emissions, and they generally have an alternate operating mode with late injection to initiate a regeneration of the particulate filter. It's too hard (I reckon impossible) to do this with anything other than electronic control.

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