GAR | ACSF-04-04

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Document Title	Protective Braking for ACSF
Reference Number	ACSF-04-04
Date	19 Nov 2015
Summary	Presentation proposing a requirement for defensive braking on vehicles equipped with ACSF because automated steering may result in driver inattention and therefore require compensating environment monitoring and automatic braking. This type of "protective braking" is viewed as a different order of braking than AEBS given that the principle involves maintaining of distances and avoiding accidents at speed rather than as an emergency or abrupt braking.
Source(s)	BMDV
Rulemaking Area(s)	UN R79 Steering Equipment and UN R131 Advanced Emergency Braking
Meeting(s)	ACSF \| Session 4 \| 25-27 Nov 2015 5.6. Document ACSF-04-04
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Excerpts from session reports related to this document
ACSF \| Session 4 \| 25-27 Nov 2015		Main content of document from (D): Purpose of this document is to describe the necessities of the braking system when using the ACSF system. (OICA): Overriding of the driver should always be possible. (D): Group should decide this (Chair): At least brake apply should be always possible (D): Target is, that a wrong intervention of the driver may not lead to a false reaction of the system (Chair): Overriding of the system could be “made difficult” for a certain time (OICA): IS EM1B really necessary, as EM1A and EM2 should be sufficient (EC): EM1B-Test: Are the systems be able to perform the test without a need to hand over to the driver? (OICA/CLEPA): Yes (ROK): Are the three tests because of safety? (D): Yes, to cover the complete speed range (J): Is there experience with regard to the EM1A test (D): Yes, but a test track of ≥ 400m is necessary