Diagnosing method for brake system
A diagnostic method and braking system technology, applied in the direction of braking safety system, etc., can solve problems such as doubling
Active Publication Date: 2017-12-15
IPGATE
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[0003] A major disadvantage of the PDC is that the seals and the pressure generators with corresponding load cycles are additionally loaded, possibly doubled
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[0030] figure 1 shows a brake actuating device which essentially corresponds to that in DE 10 2014 111 594 image 3 brake actuating device, so that reference may also be made to the brake actuating device in this connection. There is provided: a first pressure source in the form of a piston-cylinder unit (master cylinder) 2; a second pressure source or a piston-cylinder unit 4 with a double-stroke piston (DHK) 6; and a third pressure source or a Piston-cylinder unit 8 with auxiliary piston 10 . The actuating device, in particular the brake pedal 1 , acts on the auxiliary piston 10 via a force-displacement sensor KWS with two pedal travel sensors 12 a , 12 b (described in more detail below). The movement of the auxiliary piston can be transmitted to the piston SK of the first piston-cylinder unit (master cylinder) 2 by means of the auxiliary piston pushrod 3 . The double-stroke piston (DHK) 6 of the second piston-cylinder unit is driven by means of an electromagnetic drive w...
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The invention relates to a diagnosing method for determining the sealing property of one or more sealing elements and / or valve functions in a brake system with at least two braking circuits. Each braking circuit is provided with a braking circuit hydraulic pipeline; one or more wheel brakes are respectively connected to each braking circuit hydraulic pipeline; the brake system is provided with one or more pressure sources which are used for forming pressure in the wheel brakes and can be adjusted, and one or more pressure sensors are used for determining the pressure of the braking circuits; and a control device is used for controlling a valve and the pressure sources which can be adjusted. The diagnosing method disclosed by the invention is characterized in that after the braking process is completed by the control device, the diagnosing method is executed through pressure A which still exists in the braking system and especially exists in or is caused by the working space of one or two braking circuits and / or a hydraulic pipeline, or a piston hydraulic cylinder system, or the pressure B lower than the pressure A, or is executed through the pressure of which the maximum value is 30bar and especially the pressure of which the optimal maximum value is 10-25bar.
Description
Background technique [0001] Diagnostic cycles are frequently introduced in safety-related systems in order to detect faults, also called incipient faults, for example in the event of leaking seals. This is called a PDC before driving. [0002] Additional expensive components are also used, for example a magnetic valve in DE 10 2011 080 312, in order to check the piston and the seal. [0003] A major disadvantage of the PDC is that the seal and the pressure generator with the corresponding load cycles are additionally loaded, possibly doubled. In braking systems, it is estimated that there are approximately 200,000 operations per year (corresponding to 250 operating hours) at different brake pressures, 80% of which are below 25 bar and only a few thousandths exceed 100 bar. [0004] The diagnostic cycle is significant for the failure probability AW. If, for example, the function is checked every time braking or after every braking, then the failure rate is only possible (1 / 2...
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IPC IPC(8): B60T17/22
CPCB60T17/22
Inventor 安东·万·赞滕海因茨·莱贝尔
Owner IPGATE