300 PSI boost-referenced fuel pressure regulator?

Use a N/O solenoid valve with a minimum spec pressure reg in series. Solenoid circuit fails, no harm done.

Why the question of longevity of a solenoid valve system?
 
I'm talking about dynamically controlling the pressure by hooking the solenoid to a PWM. Turn the solenoid on and off 20-30 times a second; leave it on longer each time to lower the pressure, leave it on shorter each time to increase the pressure. It's a method of ever-growing popularity, but most solenoid valves are all still rated for only so many cycles... Being modulated at 25 hertz, a solenoid valve will rack up 1,000,000 cycles in about 12 hours.

Putting one or several pressure regulators behind solenoid valves really wouldn't be any cheaper and it wouldn't let me adjust pressure on the fly, but it'd be easier to program and the valves would last forever.
 
Begle1 said:
I'm talking about dynamically controlling the pressure by hooking the solenoid to a PWM. Turn the solenoid on and off 20-30 times a second; leave it on longer each time to lower the pressure, leave it on shorter each time to increase the pressure. It's a method of ever-growing popularity, but most solenoid valves are all still rated for only so many cycles... Being modulated at 25 hertz, a solenoid valve will rack up 1,000,000 cycles in about 12 hours.

Putting one or several pressure regulators behind solenoid valves really wouldn't be any cheaper and it wouldn't let me adjust pressure on the fly, but it'd be easier to program and the valves would last forever.
Click to expand...




You don't quite have it right........PWM valves used in pressure control don't necessarily go from full on to full off, or cycle like and injector.

The PWM current profile can be set so that the valve "floats" at the required restriction to maintain the pressure.

Like the FCA's on our cp3 pumps, you can hear and feel them vibrate........at the PWM frequency but they are not going from full closed to full open.

The life cycle of these valves are very long.
 
I've never had much success dialing solenoid valves to work that way though.
 
^^Joe, would that not be considered an 'analog' type of valve? Or am I missing something.

I worked a brief period for a company that manufactured minature solenoid valves whose intended operation is just as Begle1 describes.
 
Hurley said:
^^Joe, would that not be considered an 'analog' type of valve? Or am I missing something.

I worked a brief period for a company that manufactured minature solenoid valves whose intended operation is just as Begle1 describes.
Click to expand...



"Proportional valve" is the word your looking for. Not a simple on/off.

This is were the spool can be accurately controlled by varying the input current to the solenoid.

Like the FCA on our common rails. Lots of examples in hydraulic applications.
 
thank you joe. I haven't been back in a few days to see begles post.

I think you should strongly consider the circuit I directed you to builld.
 
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