Circuit arrangement for detecting a type for a solenoid valve

Patent metadata

Field	Value
Publication number	US-10145883-B2
Application number	US-201715689762-A
Country	US
Kind code	B2
Filing date	Aug 29, 2017
Priority date	Jul 26, 2012
Publication date	Dec 4, 2018
Grant date	Dec 4, 2018

Abstract

A circuit arrangement for detecting a solenoid valve type in vehicles, including at least one solenoid valve in the circuit arrangement for detecting the solenoid valve type and having at least one coil winding having a resistance of the typical order of magnitude for a predetermined vehicle electrical distribution system supply voltage, a constant current source, arranged to impress a predetermined measurement current into the one coil winding of the solenoid valve, a current mirror circuit, arranged to generate a second voltage on a detection section of the circuit arrangement from a first voltage produced as a result of the impressed measurement current on the at least one coil winding of the at least one solenoid valve, in which the second voltage produced on the detection section is passed out, on the detection section, directly to a microcontroller in a control device for determining the type of solenoid valve.

First claim

What is claimed is:

1. A circuit arrangement for detecting a type of solenoid valve in a vehicle, comprising:
at least one solenoid valve incorporated into the circuit arrangement to detect the type of the solenoid valve and having at least one coil winding having a resistance associated with a predetermined vehicle electrical distribution system supply voltage;
a current source arranged so as to impress a predetermined measurement current into the at least one coil winding of the at least one solenoid valve; and
a microcontroller in a control device for determining the type of solenoid valve based on the impressed measurement current by the current source.

2. The circuit arrangement of claim 1 , wherein a first voltage is produced as a result of the impressed measurement current on the at least one coil winding of the at least one solenoid valve.

3. The circuit arrangement of claim 1 , wherein the circuit arrangement forms part of an anti-lock braking system and/or part of a traction control system for a utility vehicle.

4. A circuit arrangement for detecting a type of solenoid valve in a vehicle comprising:
at least one solenoid valve incorporated into the circuit arrangement to detect the type of the solenoid valve and having at least one coil winding having a resistance associated with a predetermined vehicle electrical distribution system supply voltage;
a current source arranged so as to impress a predetermined measurement current into the at least one coil winding of the at least one solenoid valve; and
a microcontroller in a control device for determining the type of solenoid valve based on the impressed current source;
wherein a first voltage is produced as a result of the impressed measurement current on the at least one coil winding of the at least one solenoid valve; and
wherein the circuit arrangement further comprises a current mirror circuit arranged so as to generate a second voltage from the first voltage, wherein the second voltage is transmitted to the microcontroller.

5. The circuit arrangement of claim 4 , wherein the current mirror circuit includes an operational amplifier, a transistor and a second resistance, and the current mirror circuit transmits the first voltage to a first resistance, which is connected to the transistor towards the vehicle electrical distribution system supply voltage.

6. The circuit arrangement of claim 4 , wherein a sensitivity and/or a detection range of the circuit arrangement is adjustable, wherein the resistance of the solenoid coils is calculated via the transformation ratio of the first voltage to the second voltage and the impressed measurement current.

7. A circuit arrangement for detecting a type of solenoid valve in a vehicle comprising:
at least one solenoid valve incorporated into the circuit arrangement to detect the type of the solenoid valve and having at least one coil winding having a resistance associated with a predetermined vehicle electrical distribution system supply voltage;
a current source arranged so as to impress a predetermined measurement current into the at least one coil winding of the at least one solenoid valve; and
a microcontroller in a control device for determining the type of solenoid valve based on the impressed current source;
wherein the detected type of solenoid valve is a vehicle electrical distribution system supply voltage for which the solenoid valve is designed, wherein the vehicle electrical distribution system supply voltage includes rated voltages of 12 V and/or 24 V, and in that the solenoid valve is a pressure control solenoid valve for use in braking systems and/or traction control systems of a utility vehicle.

8. The circuit arrangement of claim 7 , wherein the resistance of the coil winding of the solenoid valve for a rated voltage of 12 V is within a single-digit resistance value range, and for a higher rated voltage, is within a two-digit to three-digit resistance value range.

9. A circuit arrangement for detecting a type of solenoid valve in a vehicle comprising:
at least one solenoid valve incorporated into the circuit arrangement to detect the type of the solenoid valve and having at least one coil winding having a resistance associated with a predetermined vehicle electrical distribution system supply voltage;
a current source arranged so as to impress a predetermined measurement current into the at least one coil winding of the at least one solenoid valve; and
a microcontroller in a control device for determining the type of solenoid valve based on the impressed current source;
wherein the current source includes a transistor, which is connected to a respective resistance at the emitter, base and collector, with a voltage signal which is 5 V in the measurement state of the circuit arrangement being applied to the base connection of said transistor.

10. A circuit arrangement for detecting a type of solenoid valve in a vehicle comprising:
at least one solenoid valve incorporated into the circuit arrangement to detect the type of the solenoid valve and having at least one coil winding having a resistance associated with a predetermined vehicle electrical distribution system supply voltage;
a current source arranged so as to impress a predetermined measurement current into the at least one coil winding of the at least one solenoid valve; and
a microcontroller in a control device for determining the type of solenoid valve based on the impressed current source;
wherein the measurement current impressed by the current source into the at least one coil winding of the at least one solenoid valve is configured so that solenoid valve type is detectable, but the flow of said measurement current does not yet result in functional activation of a respectively measured solenoid valve, and the measurement current is approximately 9 mA.

11. A circuit arrangement for detecting a type of solenoid valve in a vehicle comprising:
at least one solenoid valve incorporated into the circuit arrangement to detect the type of the solenoid valve and having at least one coil winding having a resistance associated with a predetermined vehicle electrical distribution system supply voltage;
a current source arranged so as to impress a predetermined measurement current into the at least one coil winding of the at least one solenoid valve; and
a microcontroller in a control device for determining the type of solenoid valve based on the impressed current source;
wherein at least one first high-side switch for activating the coil of the at least one solenoid valve is in series with the at least one solenoid valve, a second switch, which is common for the at least one solenoid valve, is in parallel with the current source to ground potential, wherein said second switch is closed in the normal operating state, and a third switch for switchably impressing the current is at the current source, and wherein, in a measurement operation state, the third switch is closed, the second switch is open, and the at least one first switch is closed.

12. A circuit arrangement for detecting a type of solenoid valve in a vehicle comprising:
at least one solenoid valve incorporated into the circuit arrangement to detect the type of the solenoid valve and having at least one coil winding having a resistance associated with a predetermined vehicle electrical distribution system supply voltage;
a current source arranged so as to impress a predetermined measurement current into the at least one coil winding of the at least one solenoid valve; and
a microcontroller in a control device for determining the type of solenoid valve based on the impressed current source;
wherein a battery is provided as a vehicle

Assignees

• Knorr Bremse Systeme Fuer Nutzfahrzeuge Gmbh

Inventors

• Scholl Frank
• Wieder Gerhard
• Winz Dieter

Classifications

• G05D1/00

  Control of position, course, altitude or attitude of land, water, air or space vehicles, e.g. using automatic pilots (drive control systems specially adapted for autonomous road vehicles B60W60/00) · CPC title

• G01R31/007 Primary

  using microprocessors or computers · CPC title

• F16K1/00

  Lift valves {or globe valves}, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces ({in combination with sliding valves F16K3/246, F16K3/267} ; diaphragm valves F16K7/00) · CPC title

• B60T8/36 Primary

  including a pilot valve responding to an electromagnetic force · CPC title

• B60T8/885

  using electrical circuitry · CPC title