TESTING | cwuseniorproject2016

TESTING AND RESULTS

Parameters of Interest:

The Automotive Hub Stand will be tested on a pass or fail basis for its dimensional specifications. The device will be tested for fitment and load capacity by installing it on the intended vehicle and making sure it securely mounts to the hub.

Predicted Performance:

The predicted values for the Automotive Hub Stand will meet or exceed the stated requirements. The physical parameters of the device are predicted to be within the required height range of 18 in.-22 in., width of 11 in, weight of less than 21 lbs., and possess a center bore size of 77mm as well as 5x112/100 bolt patterns. The Automotive Hub Stand is predicted to be able to withstand a load of 3,000 lbs. or greater. The device is predicted to be pivot up to 3 degrees in all axes for suspension adjustments as well as be height adjustable. The Automotive Hub Stand is predicted to fit on an Audi/Volkswagen or Subaru vehicle using the factory lug bolts or nuts.

Data Acquisition:

The data will be collected using basic measurement tools such as a tape measure and scale. The angle of suspension adjustments will be measured using an electronic level. Fitment of the Hub Stand will be dependent on being able to securely mount the device to the vehicle hub.

Method/Approach:

Resources:

My colleague Derek Lamrache provided the test vehicle (2003 Subaru WRX) on Test Day 1. Carson Man provided the test vehicle (2002 Volkswagen Jetta) on Test Day 2. Jose B provided the hydraulic jack needed to lift the vehicle. The electronic level was downloaded from the app store for free and the tape measure and scale were already in my possession.

Data Capture:

An IPhone 6 was used to capture pictures and videos of the test. Data was collected using paper and pen and transferred to a Word Document.

Test Procedure Overview:

The test vehicle was lifted up and the rear wheel was removed. The Automotive Hub Stand was mounted onto the vehicle hub securing it with the factory bolts. The vehicle was lowered so it was resting on the hub stand. Before load and after load angle measurements were taken. The physical specifications were measured.

Operational Limitations:

The camber angle of the Automotive Hub Stand was measured using an electronic scale. However, the caster and toe angles could not be measured because not all four roller balls on the device contacted the ground. This was due to the roller balls not compensating enough of the camber angle.

Test Procedure:

Time/Duration: 1 hour

Place: Flat level ground - garage or driveway

Actions:

1. Put vehicle in Park and set the Parking Brake (E-brake).

2. Loosen wheel bolts or nuts.

3. Jack up vehicle using an automotive jack with the correct load rating.

4. Remove wheel bolts or nuts completely.

5. Remove wheel.

6. Install the Hub Stand by lining up the bolt holes and using the factory lug bolts or nuts to secure it to the hub of the vehicle.

7. Slowly lower the vehicle so it is solely supported by the hub stand.

8. Leave installed for 30 min.

9. Jack up vehicle.

10. Loosen wheel bolts or nuts.

11. Remove Hub Stand.

12. Install wheel and hand tighten wheel bolts or nuts.

13. Slowly lower the vehicle.

Risk/Safety:

Make sure the test location is flat and level. The jack used to raise and lower the vehicle must have the correct load rating (2.5 tons minimum). When jacking up the vehicle, make sure to place the jack directly under the frame or manufacturer specified jack point. Jacking the vehicle up on any other location can cause serious damage. There is a possibility that the Hub Stand could fail and not be able to support the 3000lb load requirement. To mitigate this risk, the jack will be set so that if the Hub Stand does fail, the jack act as a safety net and catch the vehicle.

Discussion:

The Automotive Hub Stand was designed and manufactured for use on vehicles with a 5x100 and 5x112 bolt patterns, which consist of various Subaru, Audi and Volkswagen models. Also, the Automotive Hub Stand is designed for factory suspension systems and not intended for lowered or raised vehicles.

Parameter Values:

The physical parameter values that were tested were height, width, weight, center bore diameter and bolt patterns. Other parameters tested were height adjustability.

Success Criteria Values:

The Automotive Hub Stand is considered to be successful if it mounts up to a 5x112 or 5x100 bolt pattern vehicle and supports it.

Conclusion:

In conclusion, the Automotive Hub Stand Design was a success because it met all the requirements set forth in the proposal.