@embedded32/sim

Multi-ECU J1939 vehicle simulator for the Embedded32 platform.

Overview

Comprehensive J1939 vehicle simulation with multiple ECUs for:

• Fleet management development
• Diagnostic tool testing
• Training data generation
• Hardware-in-the-loop testing

Installation

npm install @embedded32/sim

Supported ECUs

Engine Controller (SA: 0x00)

• PGN F004 (EEC1) - Engine speed, load, fuel rate, coolant temp
• PGN FEE9 (ET1) - Engine temperatures
• PGN FEF2 (FE) - Fuel economy

Transmission Controller (SA: 0x03)

• PGN F003 (ETC1) - Gear position, shaft speeds, fluid pressure
• PGN F00C (TF) - Transmission fluids
• PGN FE6C (TC1) - Transmission control

Brake Controller (SA: 0x0B)

• PGN FEEE (ABS) - Individual wheel speeds
• PGN FEAE - Brake pressure, ABS/traction status

Aftertreatment Controller (SA: 0x0F)

• PGN FEDF - DEF tank level
• PGN FEEF - NOx, EGR
• PGN FEE5 - DPF status and regeneration

Usage

Full Vehicle Simulation

import { VehicleSimulator, EngineSimulator } from "@embedded32/sim";

const vehicle = new VehicleSimulator({
  enabled: {
    engine: true,
    transmission: true,
    aftertreatment: true,
    brakes: true,
  },
  scenario: EngineSimulator.getAccelerationScenario(),
  broadcastInterval: 100
});

// Listen to J1939 messages
vehicle.on("message", (messages) => {
  messages.forEach(msg => {
    console.log(`[J1939] ${msg.name} (PGN: 0x${msg.pgn.toString(16)})`);
  });
});

// Listen to vehicle state
vehicle.on("tick", (state) => {
  console.log(`Engine: ${state.engine.rpm} RPM`);
  console.log(`Speed: ${state.vehicleSpeed} km/h`);
});

vehicle.start();

Engine Scenarios

// Idle - engine at idle RPM
EngineSimulator.getIdleScenario()

// Acceleration - 0-2500 RPM over 10 seconds
EngineSimulator.getAccelerationScenario()

// Cruise - steady 1800 RPM, 30% load
EngineSimulator.getCruiseScenario()

// Deceleration - 2500 RPM down to idle
EngineSimulator.getDecelerationScenario()

Individual ECU Control

import { 
  EngineSimulator,
  TransmissionSimulator,
  BrakeSimulator,
  AftertreatmentSimulator 
} from "@embedded32/sim";

const engine = new EngineSimulator();
engine.start();
engine.loadScenario(EngineSimulator.getCruiseScenario());

const engineState = engine.tick();
const eec1Data = engine.encodeEEC1();
const et1Data = engine.encodeET1();

Transmission Control

import { TransmissionSimulator, GearPosition } from "@embedded32/sim";

const transmission = new TransmissionSimulator();
transmission.setGearPosition(GearPosition.Drive);
transmission.tick(engineRpm, engineLoad);

const etc1Data = transmission.encodeETC1();

License

MIT © Mukesh Mani Tripathi