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VBOX Sport – New GNSS Engine

Racelogic are upgrading the GPS receiver in the VBOX Sport to be multi-constellation. The new receiver operates at 10 Hz and will be able to use GPS & GLONASS for positioning. No pricing or part numbers will be affected.

The external antenna suitable for use with VBOX Sport is now the RLACS215 GPS/GLONASS antenna. 

Performace Comparison

VBOX Sport 10 Hz gains an added benefit by using a dual constellation solution for signal processing (GPS and GLONASS). By using both constellations together we are able to calculate a much more accurate speed and position signal in challenging GNSS reception areas. Challenging areas include tree lined roads, tall buildings and large structures that can block and reflect GNSS signals.

Here is a scenario driving through town in a challenging GNSS signal reception area due to tall building close to the road. During the test we compared the new 10 Hz VBOX Sport against the older 20 Hz VBOX Sport. As you can see the speed and position signals on the blue trace (20 Hz GPS only VBOX) are heavily affected by multipath reflection. 

Speed (Red = 10 Hz GPS/GLONASS, Blue = 20 Hz GPS Only), as the vehicle moves into a poor GNSS signal reception area speed signal degrades for the GPS only VBOX (blue).

speed

Satellite lock during the recording (Red = 10 Hz GPS/GLONASS, Blue = 20 Hz GPS Only), note that 12 GNSS satellites are maintained on the 10 Hz VBOX. The VBOX 10 Hz can see and track more than 12 satellites, it chooses the best 12 satellites to use to produce the best speed and position signal possible.

lock

Even though the sample frequency has dropped from 20 Hz to 10 Hz the quality of the speed and position signals has significantly improved. Also note the drop in sample frequency does not impact acceleration, deceleration and lap timing results, this is due to interpolation within software. For most, if not all, motorsport and automotive applications the difference between 10 Hz and 20 Hz is negligible.

In poor GNSS reception areas we would actually expect to see an improvement on lap timing results due to better signal quality.

– The End –

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Power and Torque UNIT Converter

Racesolution is using ‘PS’ for horsepower unit and ‘Nm’ for torque which is commonly used in this field.

Horse power

  • PS = DIN = CV – Metric
  • KW – EU’s standard of measurement
  • HP = BHP – British
 1  KW = 1.341 HP
1 KW = 1.359 PS

http://www.statman.info/conversions/power.html

Torque

  • Nm
  • kgf.m
  • lb.tf
  1  Nm = 0.102 kgf.m
1 Nm = 0.737 lb.tf

http://www.statman.info/conversions/torque.html

-The End-

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4 steps dyno measurement for repeatability and accuracy

Ver 0.9_ racesolution.nl

INDEX

  1. Check the Vehicle
  2. Load and positioning the Vehicle
  3. Executing the Measurement
  4. Unloading

CONTENTS

1.   Check the Vehicle

  • Check previous log, if not exist vehicle identification data create into datebase by scanner
    1. VIN
    2. Model, Year, Manufacture, Engine, Trasnmission
    3. ECU Model
  • Scanning the digonosis through OBD port and printing the result
  • Check FR/RR
  • Check the condition of tire and trade wear – minimum 2mm
  • Check Tire Pressures – Using Fixed rate( 40psi ) or keep the data for next time 40psi
  • Engine oil level, coolants, oil leakage, Fuel remainning

2. Load and positioning the Vehicle

  1. Get the Key and load the vehicle on the dyno
  2. Basic STRAP
  3. Give some throttle to settle the car
  4. Place Tire BLOCK
  5. STRAP tight again
  6. Install exhaust extraction
  7. (Opt) Install RPM pick-up
  8. (Opt) Connect logging tool with OBD port, if it is needed
  9. (Opt) Install AFR Sensor, if it is needed
  10. Final check around the car
  11. Guide guests and audiance to avoid any risks

3.   Executing Measurement

  1. Turn on the cooling fan
  2. Turn on the engine
  3. Creating customer data on Dyno software
  4. If automatic
    • Find how kick down work
    • Max RPM to Hold same gear while full throttle
  5. Find which gear need to be used and maximun RPM
  6. Configure/Check Dashboard RPM Gauge is matched RPM gauge in the dyno s/w
  7. Check water temperaure ( 95 ~ )
  8. Full throttle/Measure the power, torque and etc until it relatively same result is shown repeatedly.
  9. Cooling down and turn off the fan
  10. Printing the result – A4 format

4.   Unloading

  1. All Laptop, Cable, Scanner and etc move away from the car
  2. Loosen the strap
  3. Vehicle Wheel is get out of dyno Roller *
  4. Remove the strap
  5. Erase error code by scanner if it is needed
  6. Hand over the key to customer with printed result – Digonosis result X 1, Dyno graph X 1

-The End-