Good morning.
I have posted here before and have gotten AMAZING advise (thank you!). I'm back for more. This BCaps Sub Forum is so well attended I thought I would post here.
This question is for an automotive application but has to do with what are essentially electrical questions and problem solving... If this is inappropriate I get it. Feel free to delete it or move the question.
The V 12 Jaguar XJS is notorious for overheating in stop and go traffic in hot weather... Y'all will be potentially helpinh a LOT of people. The solutions and directions here will be shared on Jaguar Forums, a global jag forum.
The 1990 Jaguar XJS uses a signal from a coolant temp sensor (a thermistor style sensor) to control spark and fueling. The sensor is supplied 5v by the ECU which reports a varying signal based on temperature . The sensors resistance decreases as temperature increases and visa versa. It then uses these values to determine spark duration, timing and fueling amounts.
The idea is to take this varying V+ value (which newer jaguars do) and convert the varying voltage to a useable Hz value that can be used to run an OE electric PWModulation style cooling fan from a newer jaguar... On the newer cars, the fan units (LOTS and readily available) HAVE the PWM module built into the fan unit in various designs. It is really just a 2 wire connector with a signal (Hz?) coming from the ECU.
One question is whether or not the ECU signal is ALREADY in a Hz form,,, OR whether the signal itself is in V and the module in the fan shroud makes the conversion. Many of the folks on the Jaguar Forum believe that the conversion from V to a useable Hz to PWM signal happens in the ECU. But that is not known.
Is there a device similar to this one that can be used?
The idea (SOMEHOW) is to use a thermistor sensor (or the OE signal from the one already on the car) and convert it's signal to drive the OE PWM cooling fan from a new vehicle.
Heeeelp... What do y'all say?
I have posted here before and have gotten AMAZING advise (thank you!). I'm back for more. This BCaps Sub Forum is so well attended I thought I would post here.
This question is for an automotive application but has to do with what are essentially electrical questions and problem solving... If this is inappropriate I get it. Feel free to delete it or move the question.
The V 12 Jaguar XJS is notorious for overheating in stop and go traffic in hot weather... Y'all will be potentially helpinh a LOT of people. The solutions and directions here will be shared on Jaguar Forums, a global jag forum.
The 1990 Jaguar XJS uses a signal from a coolant temp sensor (a thermistor style sensor) to control spark and fueling. The sensor is supplied 5v by the ECU which reports a varying signal based on temperature . The sensors resistance decreases as temperature increases and visa versa. It then uses these values to determine spark duration, timing and fueling amounts.
The idea is to take this varying V+ value (which newer jaguars do) and convert the varying voltage to a useable Hz value that can be used to run an OE electric PWModulation style cooling fan from a newer jaguar... On the newer cars, the fan units (LOTS and readily available) HAVE the PWM module built into the fan unit in various designs. It is really just a 2 wire connector with a signal (Hz?) coming from the ECU.
One question is whether or not the ECU signal is ALREADY in a Hz form,,, OR whether the signal itself is in V and the module in the fan shroud makes the conversion. Many of the folks on the Jaguar Forum believe that the conversion from V to a useable Hz to PWM signal happens in the ECU. But that is not known.
Is there a device similar to this one that can be used?
The idea (SOMEHOW) is to use a thermistor sensor (or the OE signal from the one already on the car) and convert it's signal to drive the OE PWM cooling fan from a new vehicle.
Heeeelp... What do y'all say?
Comment