2 Building Blocks Pyramid of Safety Complete Brake System Integration

Download 2 Building Blocks Pyramid of Safety Complete Brake System Integration

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<ul><li> Slide 1 </li> <li> Slide 2 </li> <li> 2 Building Blocks Pyramid of Safety Complete Brake System Integration </li> <li> Slide 3 </li> <li> Safety Systems On-Board Vehicles ABS, ATC, RSC, RSS, OnGuard </li> <li> Slide 4 </li> <li> . Anti-Lock Braking System (ABS) and Automatic Traction Control (ATC) </li> <li> Slide 5 </li> <li> Accelerometer Cab Frame Accelerometer ABS / ECU With RSC Accelerometer </li> <li> Slide 6 </li> <li> COLOR KEY Primary Secondary Park &amp; Emergency Blended Air Supply Electrical Wire Roll Stability Control </li> <li> Slide 7 </li> <li> Roll Stability Control (RSC) Platform RSC functionality integrated in power unit ABS / ATC ECU Accelerometer mounted directly to ECU Printed Circuit Board When roll thresholds are exceeded: SAE J1939 datalink used to de-throttle engine &amp; apply engine brake / retarder Solenoid valves can actuate steer, drive &amp; trailer axle brakes SAE J1587 and J1939 DataLink for driver communication &amp; diagnostics Stability / ATC indicator lamp </li> <li> Slide 8 </li> <li> Measurement &amp; processing of lateral acceleration Calculation of critical acceleration limit Rollover risk detection RSC intervention h cog CO G F lat G R G S Functional Elements of RSC Engine control Retarder control Brake control </li> <li> Slide 9 </li> <li> Closed loop control Type and magnitude of intervention determined by relationship of measured relevant lateral acceleration to control critical acceleration limit ATC/RSC light on in dash during event Intervention always includes engine torque reduction, followed by application of Engine brake (if equipped) Drive axle and trailer brakes RSC Intervention </li> <li> Slide 10 </li> <li> Warning Light on Dash </li> <li> Slide 11 </li> <li> RSC Indicator Lamp-ATC Lamp </li> <li> Slide 12 </li> <li> Roll Stability Intervention (Stage One- Throttle) </li> <li> Slide 13 </li> <li> Roll Stability Intervention (Stage 2 Engine Brake) </li> <li> Slide 14 </li> <li> Roll Stability Intervention (Stage 3, Apply Brakes </li> <li> Slide 15 </li> <li> OnGuard Collision Safety System Uses forward-looking 77 Ghz radar sensor technology to monitor distance to target vehicle Integrates collision safety system control with ABS and stability control. </li> <li> Slide 16 </li> <li> Screen background color Blue: standby mode no target vehicle detected Green: target vehicle detected Yellow: following distance alert Red: collision warning OnGuard Display </li> <li> Slide 17 </li> <li> Radar - 77 ghz Radar sensor transmitter broadcast high frequency radio signals Radio signals bounce off objects and return to receiver Determines speed and distance of target OnGuard Radar Sensor </li> <li> Slide 18 </li> <li> Fascia Connector Down Connector Up </li> <li> Slide 19 </li> <li> 19 Cruise Control NOT Set: CMS is always activated at speeds above 15 mph and will apply brakes and engine retarder control, as well as audible and visual alerts if the situation requires it. System on and Cruise Control not set. No lead vehicle detected. System on and Cruise Control not set. Lead vehicle detected. Following Distance Alert Lead vehicle is within safe following range. </li> <li> Slide 20 </li> <li> 20 Cruise Control Set: You activate the cruise control speed using factory cruise controls. When a vehicle is detected in front of you the system controls your speed to maintain a set distance between you and the detected vehicle. The CWS is on and will emit visual and audible collision warnings and if there is a collision event will APPLY BRAKING, ENGINE OR RETARDER CONTROL if needed. System on and Cruise Control set. No lead vehicle detected. System on and Cruise Control set. Lead vehicle detected. You may sense a decrease in power or vehicle speed in order to maintain a set distance between you and the detected vehicle. The braking, engine and retarder control may activate, and reduce the vehicle speed. The driver should also initiate braking if needed. </li> <li> Slide 21 </li> <li> 21 Fault Codes, OnGuard Disabled Diagnostics </li> <li> Slide 22 </li> <li> Adaptive Cruise Control (ACC) NO VEHICLE AHEAD 65 MPH 55 MPH VEHICLE DETECTED AHEAD 65 MPH to 55 MPH 55 MPH Driving at a Set Speed Vehicles Not in Lane Rejected 1. Constant Speed Driving 2. Deceleration Control Speed Reduced From 65 MPH to 55 MPH 3. Tracking Control Minimum Set Following Distance Maintained Set Following Distance </li> <li> Slide 23 </li> <li> 55 MPH to 65 MPH 55 MPH VEHICLE CHANGES LANES 55 MPH to 45 MPH 65 MPH to 45 MPH 45 MPH to 65 MPH 6. Changing Lanes 45 MPH Driver Changes Lanes &amp; Uses Turn Signal Speed Increased to 65 MPH 4. Acceleration Control Speed Increased from 55 MPH Back to 65 MPH 5. Deceleration Control Speed Reduced From 55 MPH to 45 MPH Using Throttle, Engine Brake and Tractor Foundation Brakes VEHICLE CUTS IN AND SLOWS 55 MPH New Lead Vehicle detected, significantly inside set following distance Vehicle ahead out of lane &amp; disregarded, no lead vehicle assigned </li> <li> Slide 24 </li> <li> 65 MPH to 55 MPH 9. Disengagement Driver Actuates Brake Pedal to Disengage 7. Roll Control 65 MPH to 50 MPH ACC Yaw Rate Sensor Senses Excessive Lateral G Forces and Throttles Engine Down 65 MPH to 50 MPH 8. Bend Adjustment Lead Vehicle Non-Lead Vehicle ACC Yaw Rate Sensor adjusts detection zone for turn </li> <li> Slide 25 </li> <li> Diagnostics Performed via the OnGuard display. (Active Faults Only). TOOLBOX Software 10.0 capable of diagnosing radar sensor faults and other data. </li> <li> Slide 26 </li> <li> Diagnostics: Fault Codes, OnGuard disabled </li> <li> Slide 27 </li> <li> Toolbox Software Diagnostics </li> <li> Slide 28 </li> <li> Slide 29 </li> <li> Slide 30 </li> <li> Slide 31 </li> <li> Diagnostic Fault Codes USO 2.XXXX SPN/FMI Displayed Description Repair Instructions 86110 / 12 Radar Init ErrorVerify no foreign objects on radar. 86416 / 13 Yaw Offset or H Align Error Check radar mounting and alignment. 86516 / 14 Radar Blocked or AlignVerify no foreign objects on radar. Check mounting &amp; align. 86517 / 14 Radar Blocked or AlignVerify no foreign objects on radar. Check mounting &amp; align. 86566 / 12 Engine Ignores ACC Control Usually a secondary fault. </li> <li> Slide 32 </li> <li> Radar Inspection Inspect the bumper, and fascia for any damage. Verify there is at least of clearance between the fascia and bumper. Remove fascia (either 7/16 bolts, or T-30), verify there is at least of clearance between the radar and the bumper. Verify connector is fully plugged in, and there is no damage to it, or the rubber boot. Inspect all three screws and clips, make sure not broken and screws are fully engaged. Hold both sides of radar and wiggle (should not be any play). </li> <li> Slide 33 </li> <li> Radar Inspection </li> <li> Slide 34 </li> <li> Radar Removal Remove fascia (either 7/16 bolts, or T-30). Press on the locking tabs, and remove the electrical connector. Use a T-20 torx bit and ratchet and carefully remove all three radar screws. Once radar is removed, inspect all three screws and clips. Inspect the three through hole adjusters. Make sure they are tight and not damaged. Inspect the radar harness and radar connector for damage and corrosion. Note: if there is any damage, or corrosion will have to be replaced. </li> <li> Slide 35 </li> <li> Radar Installation Line up all three screws with the through hole adjusters and hold the radar in place. Use a T-20 torx bit and ratchet and carefully install all three radar screws. Install so that about half of the threads are fully installed in the through hole adjusters. Plug in the electrical connector and make sure the rubber boot is fully covering the connector. Transition..Once the radar has been initially installed, it will have to be properly aligned. The alignment process consists of two steps, vertical and horizontal. Lets take a look at the vertical alignment process first. </li> <li> Slide 36 </li> <li> HORIZONTAL SCREW VERTICALSCREW Radar Alignment Procedure VERTICALSCREW Connector Up Connector Down </li> <li> Slide 37 </li> <li> Radar Vertical Alignment Take a digital level and place it on the shop floor directly in front of the truck and underneath the radar. Make sure the suspension is at normal ride height. Zero the level. Use the T-20 torx bit; adjust the vertical alignment screw accordingly to achieve a reading of 90 degrees. Radar needs to be perpendicular to the floor. TransitionOnce the vertical alignment has been set, the next step will be to road test the truck and perform the horizontal alignment. </li> <li> Slide 38 </li> <li> Radar Horizontal Alignment Have to drive the truck in order to perform. Start up the truck and press the mode button on the display twice to get to the radar alignment screen. Drive on a straight, flat road and track a vehicle. Screen will be blue when not tracking a vehicle; will turn green when tracking a vehicle and show distance. Start tracking a vehicle and monitor the bar graph on the display. Will start to settle in, but will not sit in one spot. Let lead vehicle increase distance to around 250 ft. </li> <li> Slide 39 </li> <li> Stop the truck and make the appropriate adjustment to the horizontal alignment screw with T-20 torx. Drive truck again after making the adjustment and track a vehicle again to verify proper alignment. Should be able to track 350 400 ft Return to the shop and re-install the fascia. Make sure the OnGuard logo is in the proper orientation. 39 Radar Horizontal Alignment </li> <li> Slide 40 </li> <li> SLIDING BAR Checking Radar Horizontal Alignment </li> <li> Slide 41 </li> <li> Radar Alignment Screen </li> <li> Slide 42 </li> <li> Parts.. Check Part Number on Tag </li> <li> Slide 43 </li> <li> Slide 44 </li> <li> Explanation of Radar Data Example The Haptic Warning occurred with a lead vehicle decelerating at about 0.1 g (fairly typical of a car approaching a stop sign or red traffic light) and was slowed to 16 mph when the Haptic Warning activated. The vehicle with the radar was still travelling 54 mph, decelerating at only 0.02 g (maybe off-accelerator for a loaded truck, accelerator lifting but not at zero position for an empty or bobtail truck); the drivers brake pedal was released. The lead vehicle was 190 feet away when the Haptic Warning became active, but if both vehicles continued at constant deceleration in a straight line, collision would have occurred within 3.2 seconds. The radar had been locked onto the lead vehicle for over 4 seconds, so there is high confidence in the accuracy of the target. </li> <li> Slide 45 </li> <li> Literature: www.meritorwabco.com SP-0818 OnGuard Driver Tips. TP-08122 OnGuard Display Operating Instructions. MM-0951 OnGuard Maintenance Manual. SP-0853 OnGuard Information. </li> <li> Slide 46 </li> <li> Driver Tips Video </li> </ul>