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OwnerJoachim Unger, Ralf Bindel +2inventors
InventorsJoachim Unger, Ralf Bindel, Ralf Haas, Dirk Wolf
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A device (10) serves to measure the injection quantity of injection systems (16), in particular for motor vehicles, and in particular in production testing. The device (10) includes a measuring chamber (14), and a coupling device by which at least one injection system (16) can be coupled to the measuring chamber (14) in pressureproof fashion. The device (10) further includes a piston (26), which is held displaceably in a guide device (18) and regionally defines the measuring chamber (14). Finally, a sensor (50) is also provided, which upon an injection by the injection system (16) detects a displacement of the piston (26). To increase the measurement precision, it is proposed that the piston (26) be at least essentially closed and be hollow in its interior.
A device for measuring the injection quantity of injection systems (16), in particular for motor vehicles and in particular in production testing, having a measuring chamber (14), a coupling device by which at least one injection system (16) can be coupled in pressureproof fashion to the measuring chamber (14), a piston (26), which is held displaceably in a guide device (18) and regionally defines the measuring chamber (14), and a sensor (50), which upon an injection by the injection system (16) detects a displacement of the piston (26), characterized in that the piston (26) is at least essentially closed and is hollow in its interior.
A device for measuring the injection quantity of injection systems (16), in particular for motor vehicles and in particular in production testing, having a measuring chamber (14), a coupling device by which at least one injection system (16) can be coupled in pressureproof fashion to the measuring chamber (14), a piston (26), which is held displaceably in a guide device (18) and regionally defines the measuring chamber (14), and a sensor (50), which upon an injection by the injection system (16) detects a displacement of the piston (26), characterized in that the piston (26) at least regionally includes an aluminum alloy and/or a titanium alloy.
The device of one of the foregoing claims, characterized in that the piston (26) at least regionally includes an alloy of the AlMgSi1 or TiAl6V4 type.
The device of one of the foregoing claims, characterized in that at least the jacket face of the piston (26), oriented toward the guide device (18), is treated in such a way that it is low-friction and/or low-wear, in particular by means of a hard coating or by the application of a C-coating.
The device of one of the foregoing claims, characterized in that the guide device (18) at least regionally includes an aluminum alloy, a steel alloy, or a titanium alloy, in particular AlMgSi1, 31CrMoV9, or TiAl6V4.
The device of one of the foregoing claims, characterized in that the piston (26) and the guide device (18) include an aluminum alloy, in particular AlMgSi1, or the piston includes a titanium alloy, in particular TiAl6V4, and the guide device includes a steel alloy, in particular 31CrMoV9, or a titanium alloy, in particular TiAl6V4.
A method for producing a device of one of the foregoing claims, characterized in that the piston (26) is produced by turning, grinding, subfinishing and hard coating or C-coating, and the guide device (18) is produced by turning, grinding, hard coating or plasma nitriding and honing.
Dependencies are inferred from the claim text.