Broken AC Compressor leading to possible complete engine damage
Lexus Test Driver
Joined: Sep 2007
Posts: 1,245
Likes: 9
From: Illinois
The original poster should've noticed the temp gauge getting hotter......
Electronic Power Steering System
SYSTEM DESCRIPTION
DESCRIPTION
The EPS system generates assist torque to assist steering effort through the operation of the motor installed on the power steering link assembly The direction and amount of power assistance are determined by signals from the torque sensor, and controlled in accordance with vehicle speed. As a result, steering effort is controlled to be light during low speed driving and moderately high during high speed driving.
FUNCTIONS OF COMPONENTS
OPERATION EXPLANATION
The torque sensors are mounted on the input shaft to the main shaft and on the output shaft to the pinion shaft. The input and output shafts are joined by a torsion bar.
If the steering wheel is turned, the torsion bar twists, resulting in a difference in the rotation angle detected by each torque sensor. The power steering ECU assembly calculates torque based on this difference.
The power steering ECU assembly calculates proper assisting torque, according to vehicle speed, based on the torque obtained in step (b). Then the ECU controls the motor drive circuit in order to cause it to generate assisting torque.
A ball screw nut is attached to the motor shaft. It converts the rotational motion of the motor into the rectilinear motion of the steering rack via the ball.
The assisting force generated in the above process will reduce the steering effort required by the driver.
Electronic Power Steering System
SYSTEM DESCRIPTION
DESCRIPTION
The EPS system generates assist torque to assist steering effort through the operation of the motor installed on the power steering link assembly The direction and amount of power assistance are determined by signals from the torque sensor, and controlled in accordance with vehicle speed. As a result, steering effort is controlled to be light during low speed driving and moderately high during high speed driving.
FUNCTIONS OF COMPONENTS
OPERATION EXPLANATION
The torque sensors are mounted on the input shaft to the main shaft and on the output shaft to the pinion shaft. The input and output shafts are joined by a torsion bar.
If the steering wheel is turned, the torsion bar twists, resulting in a difference in the rotation angle detected by each torque sensor. The power steering ECU assembly calculates torque based on this difference.
The power steering ECU assembly calculates proper assisting torque, according to vehicle speed, based on the torque obtained in step (b). Then the ECU controls the motor drive circuit in order to cause it to generate assisting torque.
A ball screw nut is attached to the motor shaft. It converts the rotational motion of the motor into the rectilinear motion of the steering rack via the ball.
The assisting force generated in the above process will reduce the steering effort required by the driver.
Thread Starter
Driver School Candidate
Joined: Mar 2012
Posts: 6
Likes: 0
From: ny
Just to give everyone an update -
Lexus decided it would fit the bill of any and all repairs related to this incidence (thank you!)
In the end, they replaced the AC compressor unit, clutch, cleaned the pulleys, recharged the AC system, replaced the expansion valve and maybe a little bit more. So, they covered several thousand dollars in repairs.
When they checked the engine in greater detail, there was no damage found...
Thanks for all of your input
Lexus decided it would fit the bill of any and all repairs related to this incidence (thank you!)
In the end, they replaced the AC compressor unit, clutch, cleaned the pulleys, recharged the AC system, replaced the expansion valve and maybe a little bit more. So, they covered several thousand dollars in repairs.
When they checked the engine in greater detail, there was no damage found...
Thanks for all of your input
Thread
Thread Starter
Forum
Replies
Last Post
