Modern car terminology, explained clearly.

Transfer Case

4WD transfer case

The drivetrain unit that sends power to front and rear axles and can provide low range.

Low Range

4L / low-range gearing

A reduction gear that trades speed for greater wheel torque and slow-speed control.

Differential Lock

Front / rear / center lockers

Locks differential action so paired wheels or axles turn together for traction.

Auxiliary Switch Panel

Accessory electrical controls

Dedicated switches for safely controlling added lights, compressors and other equipment.

Accelerator Pedal

What happens when you press the accelerator?

Follow the pedal signal through a petrol engine to the wheels, then compare diesel.

CVT Transmission

Continuously Variable Transmission

How a CVT changes ratios, how it feels and why hybrid eCVTs can be different. Problem guide.

TIPM

Totally Integrated Power Module

What the TIPM does in certain Jeep, Dodge, Chrysler and Ram vehicles. Failure guide.

Turbocharger

Exhaust-driven forced induction

An exhaust-driven compressor that increases engine airflow and power potential.

Skid Plate / Underbody Protection

Underbody armor / bash plate

Rigid protection for vulnerable engine, transmission and drivetrain components.

Automatic Emergency Braking

AEB

A driver-assistance feature that can apply the brakes when a front collision risk becomes urgent.

Adaptive Cruise Control

ACC

Cruise control that adjusts speed to help maintain distance from traffic ahead.

Lane Keeping Assist

LKA

Camera-based lane support that can warn or assist steering when the car drifts from its lane.

Blind Spot Monitoring

BSM

Side-zone monitoring that warns when a vehicle is beside or slightly behind you.

Driver Monitoring System

DMS

Cabin monitoring that checks whether the driver is attentive and ready to supervise assistance features.

Supervised Autonomous Driving

Safety-driver / human-supervised AV operation

Automated driving with a trained human onboard or otherwise available to oversee and intervene during deployment.

Robotaxi

Autonomous ride-hailing vehicle

A passenger mobility service built around an automated driving system, typically targeting driverless Level 4 operation in a defined area.

Level 4 Autonomous Driving

SAE Level 4 / High driving automation

The system performs the complete driving task and fallback without requiring a human takeover inside its defined operational design domain.

SAE Driving Automation Levels

Levels 0–5 / SAE J3016

Who drives, who monitors the road and who performs fallback from Level 0 driver support through Level 5 full automation.

Autonomous-Driving Validation

AV testing, simulation & verification

How developers build evidence through road tests, replay, closed-loop simulation, scenario coverage and regression testing.

Autonomous-Vehicle Safety Case

Evidence-backed AV safety argument

The structured reasoning and evidence used to explain why an automated driving system is acceptably safe for its intended use.

Battery Management System

BMS

The EV battery control system that monitors charge, temperature, balancing, safety and usable limits.

State of Charge

SoC

The EV battery's current usable charge level, usually shown as a percentage.

EV Thermal Management System

Battery cooling and heating

The cooling and heating system that keeps EV batteries and power electronics in their safe temperature window.

Plug and Charge

ISO 15118

Automatic EV charging authorization after the cable is connected, when car, charger and account all support it.

CCS Charging

Combined Charging System

A widely used EV connector family that combines AC charging with DC fast-charging capability.

NACS Charging

North American Charging Standard

The Tesla-origin North American EV connector now standardized through SAE J3400.

Zonal Architecture

Zone controllers

A vehicle electronics layout built around physical zone controllers and centralized compute.

Over-the-Air Update

Remote vehicle software updates

Remote software updates that can fix bugs, improve features or change vehicle behavior after delivery.

Vehicle Domain Controller

Central controller for vehicle domains

A higher-performance ECU that manages related functions such as body, chassis, ADAS, cockpit or powertrain.

E/E Architecture

Electrical/electronic architecture

The electronics blueprint that connects ECUs, wiring, sensors, actuators, networks and software in a modern car.

Brake-by-Wire

Electronic braking control

Electronic braking control that helps blend friction braking, regenerative braking and driver-assistance braking.

Regenerative Braking

EV energy recovery while slowing

EV and hybrid braking that recovers some motion energy back into the battery during deceleration.

Onboard Charger

OBC

The EV component that converts AC charging power into DC battery power and limits AC charging speed.

Bidirectional Charging

Two-way EV charging

Two-way EV power flow that can support V2L, V2H, V2B or V2G when the vehicle and equipment allow it.

Vehicle-to-Load

V2L

An EV feature that powers external devices, tools or appliances from the vehicle battery.

OBD-II

On-board diagnostics II

The standardized diagnostics port and data system used by scan tools to read vehicle faults and readiness status.

Diagnostic Trouble Code

DTC

A fault code stored by a vehicle module when it detects a problem or failed diagnostic test.

TPMS

Tire Pressure Monitoring System

A tire-safety system that warns when tire pressure is significantly low or the monitoring system has a fault.

Tire Load Index

Tire load rating

The sidewall number that maps to a tire's maximum load capacity at its specified pressure.

Physical AI

AI that perceives, reasons and acts through robots, vehicles and other physical machines.

Whole-body control

How humanoids coordinate locomotion, balance, posture and manipulation.

Zero-shot generalization

Using learned physical skills in unseen environments without target-environment retraining.

EV battery swapping

How automated battery-swap stations work and how swapping differs from fast charging.

Charger power vs car power

Why station kW ≠ vehicle charging kW

Why a high-power station does not make every connected EV charge at its headline rating.

Huawei Qiankun ADS 5

Huawei intelligent-driving system

WEWA 2.0, multi-sensor fusion, CAS 5.0, NCA and what the system does — and does not — mean for autonomy.

End-to-End Driving AI

E2E driving & embodied AI

How learned AI connects perception to driving behaviour and how it differs from a traditional modular ADAS stack.

V2X

Vehicle-to-Everything

Vehicle communication with other vehicles, infrastructure, road users and networks.

C-V2X

Cellular Vehicle-to-Everything

3GPP cellular-based V2X using direct PC5 and network Uu communication.

CMA platform

Compact Modular Architecture

A modular vehicle architecture used across Geely, Volvo and related brands for multiple vehicle types and powertrains.

5G / NR-V2X

New Radio V2X

The newer 5G New Radio generation of cellular V2X capabilities.

V2N2X

Vehicle-to-Network-to-Everything

Network-assisted V2X where backend and mobile networks help connect vehicles to the wider road ecosystem.

V2V

Vehicle-to-Vehicle

Communication between equipped vehicles for awareness and cooperative applications.

V2I

Vehicle-to-Infrastructure

Communication between vehicles and roadside or traffic infrastructure.

V2P

Vehicle-to-Pedestrian

V2X communication involving vehicles and vulnerable road users.

V2N

Vehicle-to-Network

Communication between a vehicle and network, cloud or backend services.

SDV

Software-Defined Vehicle

A vehicle whose functions increasingly depend on centralized software, compute and updates.

AIDV

AI-Defined Vehicle

An emerging term for vehicles where AI models and agents increasingly shape features and interactions.

VLA

Vision-Language-Action

An AI approach connecting visual perception, semantic reasoning and actions in intelligent driving.

All-solid-state battery

All-solid-state vs semi-solid-state battery

How true all-solid-state batteries differ from semi-solid or hybrid battery designs.

800V architecture

800-volt EV architecture

High-voltage EV architecture that can reduce current for a given power and support high charging power.

EREV

Extended-Range Electric Vehicle

An electric-motor-driven vehicle with an onboard range extender that can generate electricity.

C-rate charging

5C / 6C / 10C charging

Charging rate expressed relative to battery capacity, increasingly used in fast-charging claims.

Megawatt EV charging

1 MW, 1.5 MW and 2.25 MW charging

What megawatt-class EV charging means, and why charger output is not the same as vehicle charging power.

Dynamic Wireless Power Transfer

DWPT · In-motion wireless EV charging

Road-embedded wireless power transfer that can charge a compatible EV while it is moving.

Steer-by-Wire

SbW

Electronic steering control without a fixed mechanical link from steering wheel to road wheels.

ADAS

Advanced Driver Assistance Systems

Driver-assistance technologies for warning, braking, steering support, speed control and parking.

Car radar sensor

Automotive radar sensor

How front and corner radar measure distance and relative speed for ACC, blind-spot detection and other ADAS functions.

LiDAR

Light Detection and Ranging

Laser-based sensing that measures distance and builds a 3D representation around a vehicle.

PPV

Pre-Production / Product-Process Validation Vehicle

A near-production vehicle used to validate the car, manufacturing process, testing or launch readiness before regular production.

Tri-Motor

Three-motor electric drivetrain

How three electric motors can provide AWD, high power and more precise torque control.

Torque Vectoring

Active torque distribution

How cars vary drive torque between wheels to improve traction, cornering and stability.

Dual vs Tri vs Quad Motor

EV motor-count comparison

What changes when an EV uses two, three or four propulsion motors.

Axial-Flux Motor

High power-density electric motor topology

Why axial-flux motors are flatter than radial motors and why EV makers are interested in them.

V2G

Vehicle-to-Grid

Bidirectional EV charging that can send stored vehicle energy back to the electricity grid.