Microcontroller-Based Intelligence: At the heart of the device is a reliable microcontroller-driven electronic circuit, ensuring accurate speed monitoring, real-time response, and fail-safe operation under diverse driving conditions.

Fuel Flow Regulation Mechanism: The system integrates a high-precision fuel-regulating solenoid valve, installed seamlessly between the diesel fuel filter and the fuel injection pump. When the preset speed threshold is reached, the valve modulates fuel flow to prevent further acceleration—effectively capping vehicle speed without compromising engine performance or safety.

Digital Speed Sensing: A gearbox-mounted digital speed sensor provides highly accurate vehicle speed data, immune to slippage or external interference—ensuring consistent and tamper-resistant speed control.

Pre-Configured Speed Settings: The device comes with factory-calibrated, tamper-proof speed preset units, aligned with statutory limits mandated by transport authorities. These settings are securely locked to ensure compliance and prevent unauthorized overrides.

Purpose-Built for Compliance & Reliability: This solution is engineered to meet the Central Motor Vehicles Rules (CMVR) requirements for older-generation diesel vehicles that lack native electronic engine control units (ECUs). By retrofitting these vehicles with CTPL’s SLD, fleet operators and transport departments can achieve mandatory regulatory compliance while enhancing road safety across legacy fleets.

Backed by rigorous testing, AIS/BIS-aligned design, and nationwide service support, CTPL’s Advanced Speed Limiter delivers durability, accuracy, and peace of mind—one vehicle at a time.