US4764729A
US4764729A US07/013,329 US1332987A US4764729A US 4764729 A US4764729 A US 4764729A US 1332987 A US1332987 A US 1332987A US 4764729 A US4764729 A US 4764729A Authority US United States Prior art keywords current electromagnetic valve value current flowing controller Prior art date 1986-02-14 Legal status (The legal status is an
Mitsubishi Motors Service Manual
This chart lists the diagnosis codes only which the PHEV-ECU stores related to the selector lever and the proportional valve (clutch). For diagnosis code procedures, refer to GROUP 54D -
54Da-DTC P10C5, P10C6: Electric current in
Is the check result normal? Go to Step 3. Repair the connector or wiring harness. Then go to Step 5. STEP 3. Check of open circuit in the ground line (proportional valve). Check the wiring harness between proportional valve connector
US4764729A
More particularly, the invention relates to a method of detecting an abnormality in the current controller of an electromagnetic valve used in controlling the amount of supplementary air...
Proportional Valves May be the Key to Improving EV Battery Pack
Improving the thermal management of the battery pack is an ongoing challenge for OEMs. Taking a more targeted approach to circulating coolant through the battery pack may improve its
Abnormal Pressure Analysis of Asymmestrical Proportional Valve
Abnormal Pressure Analysis of Asymmestrical Proportional Valve-controled Multi-stage Cylinder ZHU Song-tao, CHEN De-guo, LI Jun Chinese Hydraulics & Pneumatics ›› 2013, Vol. 0 ›› Issue (11) : 27-29.
SP Valves and Coil Operating Parameters
For proportional valves, performance depends on the current in the coil. Coil current is a function of applied voltage and resistance in the coil. Find out more!
In which way proportional valves are controlled solely by current?
Proportional valves are drived by current because we need a steady force and since resistance changes with temperature if they were driven by voltage this force wouldn''t be
Current Controlled Driver for 24-V DC Solenoid With Plunger
In short, voltage drive forces overdesign because current varies with variations in coil resistance, temperature, supply voltage, and so on. Using current drive is optimal for many devices with solenoids. 4 Current Controlled Driver for 24-V DC Solenoid With Plunger Fault Detection TIDU578–November 2014 Submit Documentation Feedback
Common errors of proportional valves and cause root analysis
When the regulating pressure of valve is too low, although the passing current of proportional electromagnet is the rated value, the pressure cannot rise. If the set pressure of valve is too
Lithium Battery Pressure Relief Valves | EB BLOG
Overcharging, over-discharging, short-circuiting or external impacts may produce abnormal heat that increases the internal pressure of these lithium batteries, causing
Battery Vent Relief Valve Testing
This overpressure simulates a situation in which the built-up gases in a battery must be released quickly at a specific pressure. Proportion-Air''s custom solutions provide accurate and repeatable battery vent relief valve testing every cycle.
US4764729A
current electromagnetic valve value current flowing controller Prior art date 1986-02-14 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US07/013,329 Other languages
Proper Control Current for Proportional Valves
What is the Proper Control Current for Proportional Valves? Proportional valve spool position is directly related to the applied current, not the applied voltage. This is because coil resistance
Automotive Proportional Solenoid Drive With Highly-Accurate Current
quiescent current of only 1 µA makes these devices ideal solutions for battery-powered, always-on systems that require very little idle-state power dissipation. These devices have thermal-shutdown, current-limit, and reverse-current protections for added safety. These regulators can be put into shutdown mode by pulling the EN pin low.
6 FAQs about [Proportional battery valve current abnormality]
How do proportional valves work?
For proportional valves, performance depends on the current in the coil. Coil current is a function of the applied voltage and the resistance in the coil. Increasing voltage will increase the current level while increasing resistance will decrease the current level.
What is the internal resistance of a proportional valve?
The internal resistance of the coil is a function of the material used in the coil winding, and the ambient temperature around the coil. As the temperature of the coil winding increases, the electrical resistance increases. This results in a decrease of the current in the coil, which can decrease the output of a proportional valve.
What is proportional valve spool position?
Proportional valve spool position is directly related to the applied current, not the applied voltage. This is because coil resistance is not constant, but rather it increases with temperature. Therefore, one should limit the maximum current to the rating of the coil as specified by the valve manufacturer.
What is the best voltage for a SP valve?
On battery-operated equipment, a coil rated at several volts below nominal voltage works best. In general, it is expected that in actual application, the current applied to the SP valve will vary. Sometimes the current applied may be close to maximum, while at other times it may be close to the threshold current.
What happens if the regulating pressure of valve is too low?
When the regulating pressure of valve is too low, although the passing current of proportional electromagnet is the rated value, the pressure cannot rise. If the set pressure of valve is too low, the pilot flow will flow back to the tank from valve, so that the pressure cannot rise.
What does controlled by current mean?
"Controlled by current" does not mean that no voltage is required (although that might be true in some specialized situations), it means that current is what determines the action of the valve. So you should adjust the voltage in order to maintain a certain current if you want the valve "position" to be relatively stable.