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student_documentation:intro:lfm [2018/06/27 13:38]
Corina Steffen
student_documentation:intro:lfm [2019/04/02 02:19] (current)
Christoph Zingg
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 {{:​student_documentation:​lfm.png?​direct&​600|}} {{:​student_documentation:​lfm.png?​direct&​600|}}
  
-Prototype vehicles are not required to fit a liquid flowmeter during the 2018 season.+Prototype vehicles are not required to install ​a liquid flowmeter during the 2019 season.
 Flow Meter Installation Area with Fittings Flow Meter Installation Area with Fittings
  
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 ==== Characteristics ==== ==== Characteristics ====
  
-|Weight (LFM only) | 900g ​ |+|Weight (LFM only) | 900g ​(2lbs) ​|
 |Dimensions (LFM only) | Ø 57mm x 105mm tall (Ø 2.3” x 4.125” tall)  | |Dimensions (LFM only) | Ø 57mm x 105mm tall (Ø 2.3” x 4.125” tall)  |
 |Assembled Dimensions | Ø 57mm x 130mm tall x 206mm wide \\ (Ø 2.3” x 5.1” tall x 8.1” wide)  | |Assembled Dimensions | Ø 57mm x 130mm tall x 206mm wide \\ (Ø 2.3” x 5.1” tall x 8.1” wide)  |
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 ==== Installation before event ==== ==== Installation before event ====
 Prior to arrival at the event, teams should: Prior to arrival at the event, teams should:
-  * Locate an area to accommodate the Liquid Flow Meter (LFM)in a vertical positionwith the electrical connector at the top. +  * Locate an area to accommodate the Liquid Flow Meter (LFM) in a vertical position with the electrical connector at the top. 
-  * This location ​should ​be below the fuel injector and fuel tank.+  * This location ​must be below the fuel injector and the fuel tank, preventing air from flowing through the LFM.
   * The LFM may be secured with cable ties or the two ¼” - 20 NC threaded holes on the bottom.   * The LFM may be secured with cable ties or the two ¼” - 20 NC threaded holes on the bottom.
   * The fuel line (6 mm internal diameter) should be safely routed (away from hot exhaust and rotating parts/pinch points) to the pre-determined LFM location with one union and two tube adapters, as shown in Figure below, in place of the LFM.   * The fuel line (6 mm internal diameter) should be safely routed (away from hot exhaust and rotating parts/pinch points) to the pre-determined LFM location with one union and two tube adapters, as shown in Figure below, in place of the LFM.
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 ==== Installation at the event ==== ==== Installation at the event ====
-  - Remove union from fuel  line at location of desired flow meter location +  - Remove union from fuel line at location of desired flow meter location 
-  - Connect fuel line from fuel tank to the inlet of fuel filter ​on the flow meter+  - Connect fuel line from fuel tank to the inlet of the fuel filter ​of the flow meter
   - Connect fuel line from the injector to flow meter outlet ​   - Connect fuel line from the injector to flow meter outlet ​
-  - Open fuel tank valve slowly to allow fuel to fill the lines all the way to the injector (opening fuel line at injector might be required) +  - Open the fuel tank valve slowly to allow fuel to fill the lines all the way to the injector (opening fuel line at injector might be required) 
-  - Reconnect fuel line at injector once the majority ​of air is evacuated+  - Reconnect ​the fuel line at the injector when most of the air is out of the system
   - Turn on fuel pressure   - Turn on fuel pressure
-  - Ordered List ItemMove fuel meter to different orientations with slight agitation to ensure ​air is out of flow meter (Shell Eco-marathon representatives will vacuum ​fuel system at tech inspection to ensure all air is out of the fuel system) +  - Tilt and shake the LFM gently in order to remove remaining ​air bubbles. ​(Shell Eco-marathon representatives will finally evacuate the fuel system at tech inspection to ensure all air is out of the fuel system) 
-  - Mount flow meter to frame with the 1 ¾” spaced ​ ¼”x 20 bolts on the bottom, or zip tie to frame+  - Mount the LFM to the frame with the 1 ¾” spaced ​ ¼”x 20 bolts on the bottom, or zip tie it to the frame
   - Check for leaks at all connections!  ​   - Check for leaks at all connections!  ​
-  - Route cable to the predefined area agreed upon by the team and Shell Eco-marathon ​Organisers+  - Route cable to the predefined area agreed upon by the team and Shell Eco-marathon ​representatives.
   - Plug LFM cable into the Sensor port on the OBC   - Plug LFM cable into the Sensor port on the OBC
  
  
student_documentation/intro/lfm.txt · Last modified: 2019/04/02 02:19 by Christoph Zingg