Automotive Safety Systems Flashcards
7 cards from real CAE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Automotive Safety Systems flashcards as text
What is the primary function of an Electronic Stability Control (ESC) system?
Answer: Detect and reduce loss of traction to prevent skidding
ESC detects loss of traction by comparing driver steering input to actual vehicle direction, then selectively applies brakes to individual wheels to correct oversteer or understeer.
Which sensor type is most commonly used in tire pressure monitoring systems (TPMS) to directly measure inflation pressure?
Answer: MEMS-based piezoresistive pressure sensor
Direct TPMS uses MEMS-based piezoresistive pressure sensors mounted inside the wheel that transmit pressure data wirelessly to the vehicle's ECU.
In a frontal collision, at what approximate deceleration threshold (in g) does a typical supplemental restraint system (SRS) airbag deploy?
Answer: 8–15 g
Airbag deployment is typically triggered when crash sensors detect decelerations of roughly 8–15 g sustained for a minimum duration, indicating a severe collision.
What does the 'time-to-collision' (TTC) metric measure in forward collision warning systems?
Answer: Estimated time before the host vehicle contacts the lead vehicle at current speeds
TTC is calculated as the gap distance divided by the closing speed, estimating how many seconds remain before a rear-end collision if no action is taken.
Which standard governs functional safety requirements for automotive electrical and electronic systems?
Answer: ISO 26262
ISO 26262 is the international standard for functional safety of road vehicle E/E systems, defining Automotive Safety Integrity Levels (ASILs) from A to D.
Lane Departure Warning (LDW) systems most commonly use which technology to detect lane markings?
Answer: Forward-facing camera with image processing algorithms
LDW systems rely on a forward-facing camera combined with image processing to identify painted lane markings and determine if the vehicle is drifting.
In crash testing, what does the Head Injury Criterion (HIC) quantify?
Answer: Risk of head injury based on resultant head acceleration over time
HIC is a biomechanical metric calculated from the integral of resultant head acceleration over the most critical 15 ms or 36 ms window during impact, with higher values indicating greater injury risk.