Tesla Inc (TSLA)

[Scumbag Fraudsters]

NHTSA petition claims Tesla Sudden Unintended Acceleration is real

For quite some time, Tesla electric vehicles have been accused by drivers of accelerating out of control without anyone touching the accelerator pedal. Still, investigations have concluded that almost every single case was caused by the drivers inadvertently pressing the accelerator pedal instead of the brake. Chinese Tesla owners have got so far that they installed cameras in the foot area of their cars to prove they did not press the accelerator should a sudden unintended acceleration (SUA) event occur.

However, on June 29, 2023, ODI received a new petition requesting a reevaluation of the decision to deny DP20-001. The document explains that intermittent high electrical current demands on the vehicles' 12VDC systems may have caused some or all of the incidents examined by ODI in DP20-001. The petitioner based their information on a review of open-source research analyzing the Tesla Model 3 inverter design.
ODI petition: All Teslas are prone to sudden unintended acceleration (SUA)

Based on this, a faulty inverter design creates conditions where negative spikes in Tesla's low-voltage system can be interpreted as a full acceleration command even though the driver did not touch the accelerator. This is possible because the inverter uses a voltage reference derived from the 12-volt system to calibrate the accelerator pedal position (APP) sensor. It also explains why the logs show the accelerator was pressed all the way down, even though drivers claimed it didn't touch the accelerator.

If you were wondering what causes the negative spikes in the low-voltage system, the petition (attached below) is very detailed in engineering data. Apparently, the steering assist system uses a very high current motor powered by the 12-volt system. Because Teslas are heavy vehicles, the driver assist motor needs in excess of 100 amps to turn the wheels when the car is stationary. This causes the 12-volt system to drop voltage to near zero volts for several hundred microseconds.

This in itself does not cause sudden unintended acceleration. However, if a recalibration is initiated during this interval, then an incorrect calibration voltage will be produced that is very close to zero volts. Based on the researcher's findings, it will last until another ADC calibration is performed, which may be minutes later. Once the calibration is performed with faulty data, it can cause a spike equivalent to pressing the accelerator pedal all the way down.

What's worse is that the incorrectly increased sensor signals will be sent via the CAN bus to the vehicle logs, causing Tesla and NHTSA to conclude that the driver caused the sudden increase in torque by stepping on the accelerator pedal. But in this case, the sudden acceleration was caused not by the driver stepping on the accelerator pedal but by a random superposition of a negative-going voltage spike (which is about 100 microseconds long), and the sampling time of the analog-to-digital converter (which is about 10 microseconds long). This random superposition explains the low occurrence rate of sudden acceleration in Tesla vehicles.

https://is.gd/yJAY7S

Researcher claims faulty inverter design causes sudden unintended acceleration in Tesla vehicles

A new petition has been filed with the Office of Defects Investigation (ODI) requesting a reevaluation of the denial to investigate sudden unintended acceleration (SUA) in Tesla vehicles. The petition suggests that a faulty inverter design could be causing negative spikes in the low-voltage system, which can be misinterpreted as a full acceleration command.

The person behind the new petition, Ronald A. Belt from Plymouth, Minnesota, suggests this design flaw could explain the reports of Tesla vehicles accelerating without the driver touching the accelerator pedal.

https://is.gd/9ndUn0

READ THE PETITION HERE: https://driveteslacanada.ca/wp-content/uploads/2023/07/breaking-nhtsa-petition-shows-tesla-s-sudden-unintended-acceleration-is-real-and-curable-217525.pdf