Week 1 Challenge

3.What is E – Point ?

Ans- E point refers left and right eye of the driver it’s vital thing to calculate eyellipse and there will be a 65 mm of gap between of both and this value will be match with 95% of population of the world then each eye will have the own representation.

4.What is P – Point ?Ans- This also used by oem’s to calculate the eyellipse so this point refers the pivot point of neck which is mark over the neck exactly from the between of e point 98 mm down. And it does have 4 varieties.

5.Correlation between E Point and P Point ?

Ans- Both these point helps to calculate the eyellipse of the occupant.The P-Point is generally 98mm behind the P-point(s).

6.Eyellipse calculation as per E – Point and P – Point ?

Ans- For a 95 percentile of the driver's population, the E-point are spaced at 65mm apart and the P point for the same is space below a normal line drawn from the middle centroid of the Points at a distance of 98 mm.

7.What is full form of “SgRP” ?

Ans- Seating reference point.

8.What is H – Point ?

Ans-The H-point (or hip-point) is the theoretical, relative location of an occupant's hip: specifically the pivot point between the torso and upper leg portions of the body — as used in vehicle design, automotive design and vehicle regulation as well as other disciplines including chair and furniture design.

9.Difference between “SgRP” and “ H – Point “ ?

Ans- The H-point is the theoretical, relative location of an occupant's hip. It is the pivot point between the torso and upper leg portions of the body.

SgRP point seating reference point means a design point defined by the vehicle manufacturer for each seating position and established with respect to the three-dimensional reference system. It is also called R-point.

10.What is heel point ?

Ans- A Heel point is a point of contact of the occupant's heel with the floor of the vehicle. A heel point for a driver is called an accelerator heel point or for a passenger is called a passenger heel point.

11.What is Oscar ?

Ans- Oscar is GM’s three-dimensional, mannequin-like simulation tool comfort engineers used early in the product development process of Malibu to determine the overall dimensional layout of the car’s interior. Before the interior was designed and engineered, Oscar first provided the key measurements engineering and design needed to create optimal interior space and comfort.

Technically known as a “Comfort Dimensioning System,” Oscar is assembled in 18 removable parts weighing up to 170 lbs., and is made of steel, plastic and aluminium.

12.Difference between Oscar and Oscar Templet?

Ans- Oscar is 3d machine and Oscar template is 2D device.

12.What is the purpose of Oscar?

Ans- It does give the designer idea of how the occupant will sit into the vehicle

From that approximation a point will determine that is pivot point of torso and thigh angle this is called design H point this value should be match with sgrp which is given by OEM.

And the seat can be adjusted fore and after up and down at any time through H- point so it can be done with in window this is called as H-point window.

Once the Oscar placed according to the O packaging drawing requirement the seat can be ready design around the Oscar.

13.What is Design H – Point and Actual H - Point?

Ans- It is pivot point of torso and thigh angle this is called design H point this value should be match with sgrp which is given by OEM.

Actual H-point can be recorded through the 3D Oscar machine.

14.What is H-Point Window?

Ans- the seat can be adjusted fore and after up and down at any time through H- point so it can be done with in window this is called as H-point window.

15.Type of Oscar?

Ans- There're two types of Oscars are there one is 2D Oscar template and other one is 3D Oscar machine.

Small woman 104 lbs. 5% of drivers

Midsized man 169 Lbs. 50% of drivers

Large sized man 226 Lbs.95% of drivers

16.What is the weight (in Kg) of 95 % Oscar?

Ans- 102.512 kgs

17.What is the Importance of H – Point?

Ans- Seating design is directly created effect to the occupant’s relationship to controls

And careful measurements should’ve taken while positioning the seats and adheres with specs of OEM.

And H-point might vary because of deterioration of seats notably the foams.

18.How the tolerance of H – Point Given ?

Ans- It is given as a 2D map showing the direction of the H-Point Movement over time.

19.What is D – Point regarding a Seat ?\

Ans-The bottom point of the buttocks on the seat.

20.What is the full form of AHP ? Define its usage for seats ?

Ans- AHP = Accelerator Heel Point. It is the point on Oscar’s shoe on the un-depressed accelerator pedal with foot angle at a minimum of 87-degrees. It is used in seats to establish adequate legroom for the driver.

21.What is Hand Reach Envelop ?

Ans- The reaching distance from the driver to controls, for a specific driver population, and with safety restraints employed.

22.Types of Hand Reach Envelop ? And how it is categories ?

Ans- Primary DHC -

• Steering Control
• Gearshift Control
• Turn Signal Control
• Ignition Control
• Audible Horn
• Headlamp Control
• Hand Break
• Wiper/Defroster Control

Secondary DHC

• Climate Control
• Radio Control
• Accessory Control

• 23.What is Back/Cushion Angle?

  Ans- The back angle is the angle of recline of torso line relative to vertical

  Then the cushion angle of incline for the cushion relative to horizontal this helps to find the amount of thigh support the occupant will have.

  24.What is Ischium?

  Ans- The ischium is a paired bone of the pelvis that forms the lower and back part of the hip bone, as well as the posterior and inferior boundary of the obturator foramen.

  25.What is Tail Burn?

  Ans- This condition will happen when driver sits on seat for long time so seat should be designed to prevent this condition.

  26.How lumber help driver?

  Ans- Lumber origin is lowest vertebrae in spinal column located between ribs and the pelvis

  27.During RFQ what is expected from OEM?

  Ans- Seat reference point

  Foot angle

  Knee angle

  Heel point

  Hip point

  Back angle.

  1.What is the function of a seat?

  Ans- Support the occupant

  Provide comfort to the occupant

  Protect the occupant

  Position the occupant

  2.How the seat Support the Occupant?

  Ans- Support the occupant is essential thing of seats because improper support will affect the comfort and safety of the occupant.

  3.How the seat Position the Occupant?

  Ans- There’re three essential key factors are there when it comes to seat design that are

  • Hand, arm, and leg room:

  Hand arm and leg room is vital for safety and control to the occupant

  • Field of vision:

  This one calculated by eyellipse driver should've minimal abstraction by steering wheel, instrument panel, roof line and he should be able to see clearly through the side mirrors as well.

  • Driver proximity to hand controls:

  Occupant must’ve been able to reach appropriate controls when the vehicle is moving condition.

  4.How seat provide comfort for the occupant?

  • Ans- Determine the amount of seat padding
  • Avoiding hard points on seat
  • Determine angle seat back and cushion
  • Deciding the lumber and thigh support
  • Establishing seat height and width

  5.What is the full form of ILD? And how it is defined?

  Ans- Indentation load defection (ILD)

  The load required to compress seat pad 50% of its original thickness so there’s a load which required to compress the foam is hardness of the foam.

  If a seat is too firm it will be uncomfortable and if it's too soft occupant will contact with hard point or fatigue.