Automotive Expert

Expert guidance for automotive systems, connected vehicles, fleet management, telematics, advanced driver assistance systems (ADAS), and automotive software development.

Core Concepts

Automotive Systems

• Telematics and fleet management
• Connected car platforms
• Advanced Driver Assistance Systems (ADAS)
• Electric Vehicle (EV) management
• Vehicle-to-Everything (V2X) communication
• Infotainment systems
• Diagnostic systems (OBD-II)

Technologies

• CAN bus and automotive networks
• AUTOSAR architecture
• Over-the-air (OTA) updates
• Autonomous driving systems
• Battery management systems
• Computer vision for ADAS
• Edge computing in vehicles

Standards and Protocols

• ISO 26262 (functional safety)
• AUTOSAR (automotive software architecture)
• J1939 (heavy-duty vehicle communication)
• UDS (Unified Diagnostic Services)
• SOME/IP (service-oriented middleware)
• MQTT for telematics
• CAN, LIN, FlexRay protocols

Fleet Management System

from dataclasses import dataclass
from datetime import datetime, timedelta
from typing import List, Optional
from decimal import Decimal
from enum import Enum
import numpy as np

class VehicleStatus(Enum):
    ACTIVE = "active"
    IDLE = "idle"
    MAINTENANCE = "maintenance"
    OUT_OF_SERVICE = "out_of_service"

class FuelType(Enum):
    GASOLINE = "gasoline"
    DIESEL = "diesel"
    ELECTRIC = "electric"
    HYBRID = "hybrid"
    CNG = "cng"

@dataclass
class Vehicle:
    """Fleet vehicle information"""
    vehicle_id: str
    vin: str  # Vehicle Identification Number
    make: str
    model: str
    year: int
    license_plate: str
    fuel_type: FuelType
    status: VehicleStatus
    odometer_km: int
    last_service_km: int
    next_service_km: int
    assigned_driver_id: Optional[str]
    location: tuple  # (latitude, longitude)
    fuel_level_percent: float

@dataclass
class Trip:
    """Vehicle trip record"""
    trip_id: str
    vehicle_id: str
    driver_id: str
    start_time: datetime
    end_time: Optional[datetime]
    start_location: tuple
    end_location: Optional[tuple]
    distance_km: float
    fuel_consumed_liters: float
    average_speed_kmh: float
    max_speed_kmh: float
    harsh_braking_count: int
    harsh_acceleration_count: int

class FleetManagementSystem:
    """Fleet management and telematics system"""

    def __init__(self):
        self.vehicles = {}
        self.trips = []
        self.maintenance_schedules = []

    def track_vehicle_location(self, vehicle_id: str) -> dict:
        """Track real-time vehicle location"""
        vehicle = self.vehicles.get(vehicle_id)
        if not vehicle:
            return {'error': 'Vehicle not found'}

        # Get GPS data from telematics device
        location = self._get_gps_location(vehicle_id)
        speed = self._get_current_speed(vehicle_id)
        heading = self._get_heading(vehicle_id)

        vehicle.location = location

        return {
            'vehicle_id': vehicle_id,
            'location': {
                'latitude': location[0],
                'longitude': location[1]
            },
            'speed_kmh': speed,
            'heading': heading,
            'timestamp': datetime.now().isoformat(),
            'status': vehicle.status.value
        }

    def start_trip(self, vehicle_id: str, driver_id: str) -> Trip:
        """Start a new trip"""
        vehicle = self.vehicles.get(vehicle_id)
        if not vehicle:
            raise ValueError("Vehicle not found")

        trip = Trip(
            trip_id=self._generate_trip_id(),
            vehicle_id=vehicle_id,
            driver_id=driver_id,
            start_time=datetime.now(),
            end_time=None,
            start_location=vehicle.location,
            end_location=None,
            distance_km=0.0,
            fuel_consumed_liters=0.0,
            average_speed_kmh=0.0,
            max_speed_kmh=0.0,
            harsh_braking_count=0,
            harsh_acceleration_count=0
        )

        vehicle.status = VehicleStatus.ACTIVE
        self.trips.append(trip)

        return trip

    def end_trip(self, trip_id: str) -> dict:
        """End trip and calculate metrics"""
        trip = next((t for t in self.trips if t.trip_id == trip_id), None)
        if not trip:
            return {'error': 'Trip not found'}

        vehicle = self.vehicles.get(trip.vehicle_id)

        trip.end_time = datetime.now()
        trip.end_location = vehicle.location

        # Calculate trip metrics
        duration_hours = (trip.end_time - trip.start_time).total_seconds() / 3600
        trip.average_speed_kmh = trip.distance_km / duration_hours if duration_hours > 0 else 0

        # Calculate fuel efficiency
        fuel_efficiency = trip.distance_km / trip.fuel_consumed_liters if trip.fuel_consumed_liters > 0 else 0

        # Calculate driver score
        driver_score = self._calculate_driver_score(trip)

        vehicle.status = VehicleStatus.IDLE

        return {
            'trip_id'