Heated and Electrical Thermostats

Thermal Management Solutions Group produces a range of electrical thermostats. Benefits include increased engine power, enhanced fuel economy, lower emissions, more control and greater passenger comfort.

Overview

HEATING PINS AND HOUSING

The core element is a heating pin which is powered by the ECU, depending on operating conditions of the engine. The heating pins are available in two diameters, 4mm (standard) and 5mm (for specific applications with high force), and 3 levels of electric resistance from 9.5 Ω to 15 Ω. They are integrated into the thermostat housing either as an assembly (clipped/crimped/bayonet), or potted with a pig-tail, or overmolded in the case of plastic housings.

By electrical power supply (pulse width modulated) the opening characteristic can be shifted to colder temperatures. In combination with the wax mixture designed for a high opening temperature, the Start-To-Open temperature can be actively controlled over a range of 20°C to 40°C.

Benefits

ADVANCED ENGINE MANAGEMENT

The benefits of electrically heated wax thermostats are that they offer an enlarged operating range through variable opening temperature, advanced engine management for better environment protection and increased compatibility compared to conventional thermostats. Electrical heating of the wax element is triggered when the engine is exposed to specific load conditions. Electrical heating opens the coolant circuit earlier in situations of increased performance requirements. Depending on the preset, the engine can be operated hotter than usual.

We support customers in the definition of the control strategy of electrical thermostats.

Their short response time gives advanced engine management for better environmental protection.