In the coming years, the automobile will undergo major changes. Automation and connectivity will completely transform vehicle architecture.Highly automated driving possible from 2020.
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The TXV stands for Thermostatic Expansion Valve. Above all, the control specs are unknown. However, that requires a separate sensor and ECU. It uses a control loop with a sensor that provides the right amount of refrigerant for the chiller. The EXV is the latest generation of expansion valves. The exchanger itself is also found with different part numbers: Type To be exact, they used three different block valves on the heat exchanger by Modine. Over the years Tesla used three different types of chillers. More details can be found in a separate blogpost. I have adopted another approach and use a more lightweight Benling AC compressor. Both later types are unfortunately CAN controlled and details unfortunately are unknown (so far). Both the pump and the mating connector are available at EVcreate. The pump has four inputs: 12V+, GND a PWM input for speed control and a PWM output for diagnostics.
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Full Tesla water pump parts number overview in “ Connector kit water pump Tesla Model S / Model X“. Not tested yet myself so curious to hear your findings if you did.
I have seen various water pumps in the Tesla Model S and I am not sure which pump type / part number is used where exactly. Once the 4-way valve separates the batteries loop from the rest, each loop has it’s own dedicated pump. At least early models had a backup pump in the battery cooling loop. Water pumpĭepending on the model year, Tesla used two or three electric water pumps in their cooling circuit. It will also have a feature to control the below Tesla pump. It will have some simple inputs either via CAN-BUS or analog to control these valve positions. The front high voltage junction box (FHVJB) (Tesla part number 1028843-00-B or 1028843-00-C) controls the battery heater and can reduce heating power/capacity via high voltage PWM.Ĭurrently I am working on developing a Tesla valve and pump controller. The model year indicates in what year a letter was first used.