Automotive Glossary (EN)
Comprehensive glossary of technical, regulatory and industry terms in the automotive domain.
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Motor Vehicle
Any vehicle propelled by a motor and intended for road use. Defined by Directive 2007/46/EC and Regulation (EU) 2018/858 as any motor vehicle with at least four wheels. Classified in categories M (passenger), N (goods), O (trailers), L (two/three-wheelers).
Type Approval
Formal procedure by which a competent authority (e.g. UNECE/WP.29, EU Member State, Ministries of Transport) certifies that a vehicle or component meets applicable technical and regulatory requirements. The primary EU reference is Regulation (EU) 2018/858.
Vehicle Type
A set of vehicles sharing the same essential construction characteristics (chassis, body, engine, transmission, axle) and approved under the same "type" pursuant to Regulation (EU) 2018/858 Art. 3.
Category M1
Type approval category for motor vehicles designed for the carriage of passengers with not more than 8 seats in addition to the driver's seat. The most common category for private passenger cars. Defined in Annex II of Regulation (EU) 2018/858.
Category N1
Category for motor vehicles designed for the carriage of goods with a maximum technically permissible laden mass not exceeding 3,500 kg. Includes light commercial vans and pick-up trucks.
BEV (Battery Electric Vehicle)
A vehicle powered exclusively by electric drive using a rechargeable battery pack. Has no internal combustion engine. Direct CO2 tailpipe emissions are zero.
HEV (Hybrid Electric Vehicle)
A hybrid vehicle combining an internal combustion engine with one or more electric motors. The battery is recharged through regenerative braking without external grid charging.
PHEV (Plug-in Hybrid Electric Vehicle)
A plug-in hybrid with a larger battery that can be recharged from the electric grid. Travels a distance in pure electric mode (All-Electric Range, AER) before switching to hybrid mode.
FCEV (Fuel Cell Electric Vehicle)
A vehicle that generates electricity through the electrochemical reaction of hydrogen and oxygen in a fuel cell. The only exhaust emission is water vapour. Safety standard of reference: UNECE Reg. 134.
ICE (Internal Combustion Engine)
An engine that converts the chemical energy of a fuel (petrol, diesel, LPG, CNG) into mechanical energy through internal combustion. Emissions measurement standard: WLTP cycle (UNECE GTR 15).
WLTP (Worldwide Harmonised Light Vehicle Test Procedure)
A globally harmonised test procedure for measuring fuel consumption and CO2 emissions of light vehicles. Replaced the NEDC in the EU from 2017. Defined in UNECE GTR 15 (rev. 2014). Test phases: Low, Medium, High, Extra High.
NEDC (New European Driving Cycle)
The European test procedure for fuel consumption and emissions, used from 1970 to 2017, progressively superseded by WLTP. Less representative of real-world driving conditions.
RDE (Real Driving Emissions)
A regulation that measures NOx and particulate emissions under real-world on-road driving conditions using a PEMS (Portable Emission Measurement System). Introduced by the Euro 6d package (Regulation (EU) 2017/1151).
Euro 6
European emissions standard applicable to newly approved vehicles. Defines maximum limits for NOx, HC, CO, PM, PN. Source: Regulation (EU) 715/2007 and subsequent amendments (Regulation (EU) 2017/1154 for the Euro 6d-temp package).
Euro 7
Proposed EU emissions regulation that will update Euro 6, with tighter limits for NOx and particulate matter and extension to brakes and tyres. European Commission proposal: COM(2022)586.
Powertrain
The system of mechanical and electrical components that generate and transmit driving power to the wheels: engine (ICE, electric, or hybrid), transmission, differential, and drive shafts.
Traction Battery
An electric energy accumulator (typically lithium-ion, Li-ion) that powers the electric motor of a BEV or PHEV. Capacity is measured in kWh. Traction batteries are certified to UNECE Reg. 100 Rev.3 for safety.
State of Charge (SoC)
The current charge level of a battery expressed as a percentage of its total nominal capacity. SoC management is handled by the Battery Management System (BMS).
State of Health (SoH)
An indicator of the remaining capacity of a battery relative to its original nominal capacity. Decreases over time due to charge/discharge cycles. The industry commonly uses 80% as a significant degradation threshold (ref: UNECE GTR 22 on BEV battery durability).
BMS (Battery Management System)
An electronic system that monitors and manages the battery pack: measures voltage, current, temperature; calculates SoC and SoH; protects against overcharge, deep discharge and overheating.
Recall
A mandatory procedure by which a manufacturer recalls vehicles already sold to correct a defect that compromises safety or regulatory compliance. Governed in the EU by Regulation (EU) 2018/858 Arts. 11-12.
OBD (On-Board Diagnostics)
A standardised on-board diagnostic system that monitors emissions and powertrain functions. Mandatory in Europe for all vehicles from Euro 3 onwards. Standard connector: OBD-II (SAE J1962). Main protocol: ISO 15765 (CAN).
CAN Bus (Controller Area Network)
A serial communication protocol for the vehicle on-board network, standardised by ISO 11898. Allows ECU nodes to communicate without a central host computer.
ECU (Electronic Control Unit)
An electronic control unit that manages a specific vehicle function (e.g. engine, brakes, steering, transmission). A modern vehicle may contain between 50 and 150+ ECUs.
ADAS (Advanced Driver-Assistance Systems)
Advanced driving assistance systems: ACC (Adaptive Cruise Control), LDW (Lane Departure Warning), AEB (Autonomous Emergency Braking), BSD (Blind Spot Detection). EU Regulation 2019/2144 mandated several ADAS for new models from 2022.
Autonomous Driving Levels (SAE J3016)
SAE J3016 (rev. 2021) classification defining 6 levels of driving automation: L0 (no automation), L1 (driver assistance), L2 (partial automation), L3 (conditional automation), L4 (high automation), L5 (full automation).
V2X (Vehicle-to-Everything)
Communication between the vehicle and the outside world: other vehicles (V2V), infrastructure (V2I), pedestrians (V2P), network (V2N). Based on two technology families: DSRC/ITS-G5 (ETSI EN 302 663) and C-V2X (3GPP Rel. 14+).
ITS-G5
European V2X technology based on IEEE 802.11p/ETSI ITS-G5 (standard ETSI EN 302 663). Operates in the 5.9 GHz band (5855-5925 MHz). Used for cooperative active safety applications.
C-V2X (Cellular V2X)
Cellular-based V2X technology standardised by 3GPP. Includes LTE-V2X (Rel. 14, TS 36.885) and 5G-NR-V2X (Rel. 16, TS 38.885), both with low-latency sidelink communications.
WTA (Whole Type Approval)
EU Whole Type Approval: procedure by which an entire vehicle type is certified as complying with all applicable technical requirements before being placed on the EU market. Reference: Regulation (EU) 2018/858 Chapter IV.
COC (Certificate of Conformity)
A conformity certificate issued by the manufacturer for each individual vehicle produced, attesting compliance with the approved type. Required for vehicle registration in all EU Member States.
VIN (Vehicle Identification Number)
A unique vehicle identification number consisting of 17 alphanumeric characters. Structure defined by ISO 3779:2009. Enables traceability of the vehicle throughout its entire service life.
ELV (End of Life Vehicle)
A vehicle at end of life subject to Directive 2000/53/EC, which sets reuse and recycling targets for Member States (source: Directive 2000/53/EC Art. 7).
OEM (Original Equipment Manufacturer)
A company that designs, manufactures and markets vehicles under its own brand. Responsible for type approval and regulatory compliance of the vehicle.
Tier 1 Supplier
A direct supplier to the OEM that produces complete systems or modules (e.g. braking system, electronic cockpit). Distinct from Tier 2 and Tier 3 suppliers at lower levels of the supply chain.
Dealer / Dealership
An entity authorised by the manufacturer to sell and service vehicles of one or more brands. Operates under a selective distribution agreement compliant with Regulation (EU) 461/2010.
Homologation Authority
The technical and administrative authority competent to grant type approval. In EU countries this is typically the national Ministry of Transport or delegated technical service.
Well-to-Wheel (WtW)
An emissions analysis methodology that considers the full cycle from energy extraction/production to its use in the vehicle. Distinguishes "Well-to-Tank" (production) and "Tank-to-Wheel" (combustion).
LCA (Life Cycle Assessment)
Assessment of the environmental impact of a product along its entire life cycle. For vehicles, this includes manufacturing, use and end-of-life phases. Reference standards: ISO 14040/14044.
Predictive Maintenance
The use of telematics data, IoT sensors and machine learning algorithms to predict failures before they occur. Reduces unplanned downtime and corrective maintenance costs.
Telematics
Technologies combining telecommunications and informatics to collect and transmit operational vehicle data (GPS position, speed, consumption, OBD diagnostics). Used for fleet management, usage-based insurance (UBI) and predictive maintenance.
Fleet Management
The management of a vehicle fleet using digital tools to optimise utilisation, maintenance, operating costs and regulatory compliance.
OTA (Over-The-Air) Update
An update to on-board software transmitted wirelessly without a workshop visit. UNECE Regulation 156 (UN R156) governs the security requirements for a Software Update Management System (SUMS).
Automotive Cybersecurity (UN R155)
A set of measures to protect vehicle computing systems from attacks. UNECE Regulation 155 (UN R155) mandates a Cybersecurity Management System (CSMS) for all new types approved in the EU from July 2022.
ISO 26262
International standard for functional safety of electrical/electronic systems in road vehicles. Defines ASIL (Automotive Safety Integrity Level) levels: A, B, C, D, with ASIL D at the highest criticality.
AUTOSAR
Standard framework for automotive ECU software architecture. Comprises Classic AUTOSAR (traditional real-time embedded systems) and Adaptive AUTOSAR (high-compute systems, POSIX-based).
Regenerative Braking
A system that recovers kinetic energy during braking and converts it into electrical energy stored in the traction battery. A key efficiency feature of BEVs and HEVs.
Range (BEV)
The distance an BEV can travel on a single charge, measured under the WLTP test cycle. Depends on battery capacity (kWh) and vehicle energy efficiency (Wh/km).
Fast Charging
High-power DC fast charging. Main standards: CCS2 (IEC 62196-3, dominant in Europe), CHAdeMO. Regulation (EU) 2023/1804 (AFIR) promotes CCS2 deployment on the TEN-T network.
Infotainment
An integrated in-vehicle system combining navigation, entertainment, wireless connectivity and vehicle system control via a touchscreen interface.
Vehicle Segment
A commercial classification based on size and intended use: A (city car), B (supermini), C (compact), D (mid-size), E (executive), F (luxury), SUV, MPV, coupé.
IATF 16949
International standard for quality management systems in the automotive supply chain, issued by IATF (International Automotive Task Force). Complementary to ISO 9001.