Assumptions

Case - 1 : A car is in neutral gear and at rest

If a heavy vehicle collides with the car which is ifi neutral position due to the collision the car will also move in the same direction of the heavy vehicle with slight damage.

Case - 2 : A car is in gear and at rest

If an accident, same as above case happens with a car at rest and in any gear, the car may not be able to move. So after collisiori damage to car will be more

Case - 3 : A car is in gear and moving

If a heavy vehicle collides with a car which is coming in the opposite direction in same line, the car may not be able to move against the impulsive force, so the damage to the car will be very high.

With the aid of the CPA attachment the case (iii) can be converted to case (i) and heavier damages can be avoided and the life of the passengers will also be saved.

l DESCRIPTION

CONSTRUCTION

4 double Acting Cylinders are attached perpendicular to the chassis of the car (Two near the front wheel and two near the back wheel) and 8 super power system cylinders are attached between the chassis arid the leaf springs of the car, some cars have only compression helical springs, in such cars four SPS cylinders are fitted between the chassis and the helical spring of the cars. The top of the single acting cylinder spring returns will be attached to the chassis of the car and crash prevention wheels will be attached to the bottom of the single acting cylinder spring returns. The control switches of the CPA will be fixed in the front and back bumpers of the car.

WORKING PRINCIPLE

The CPA will work n the following three principles—

1. Hydraulic Principle

2. Pneumatic principle and

3. Detonator principle

Hydraulic Principle _. :

Applying Pascal's Hydraulics Law, when the control switches are hit, due to the collision, the CPA piston will be pushed down due to the hydraulic pressure. When the CPA unit is activated because of the collision the fluid present gets into the CPA piston and pushes it down when the piston reaches the bottom extreme position the fluid enters the SPS cylinder and pushes the SPS piston up within a fraction of second. Due to this the actual wheels of the car gets lifted and the small wheels of the CPA move in the direction of the force. As a result, the CPA wheels are pushed down to the ground and the car gets lifted to about 10 inches from the ground and the actual wheel of the car will be rotating floatingly. Due to the momentum force of the impact, the CPA wheels are pushed downwards on the road and move the car in the reverse direction thus preventing further damage and casualty. PNEUMATICS PRINCIPLE:

Applying the principle of compression (a compressor will be fixed in any appropriate place), at the time of collision, the control switches will be activated and the compressed air pushes the CPA piston down. When the CPA unit is activated because of the collision the gas/compressed air present gets into the CPA piston and pushes it down when the piston reaches the bottom extreme position the gas/eompressed.air enters the SPS cylinder and pushes the SPS piston up within a fraction of second. Due to this the actual wheels of the car gets lifted and the small wheels of the CPA move in the direction of the force. As a result, the CPA wheels are pushed down to the ground and the car gets lifted to about 10 inches from the ground and the actual wheel of the car will be rotating fioatingly. Due to the momentum force of the impact, the CPA wheels are pushed downwards on the road and move the car in the reverse direction thus preventing further damage and casualty.

DETONATOR PRINCIPLE:

A measured amount of gun powder will be kept inside the single acting cylinders above the pis ^' tons of the single acting cylinder spring return. In the event of collision, due to the impact, a spark is generated in the gun powder which pushes the piston down with force, resulting in the CPA wheels being pushed down to the ground. When the CPA unit is activated because of the collision the pressure of detonation present gets into the CPA piston and pushes it down when the piston reaches the bottom extreme position the pressure of detonation enters the SPS cylinder and pushes the SPS piston u within a fraction of second. Due to this the actual wheels of the car gets lifted and the small wheels of the CPA move in the direction of the force As a result, the CPA wheels are pushed down to the ground and the car gets lifted to about 10 inches from the ground and the actual wheel of the car will be rotating fioatingly. Due to the momentum force of the impact, the CPA wheels are pushed downwards on the road and move the car in the reverse direction thus preventing further damage and casualty. The force calculation to prevent the collision of two vehicles moving in the opposite direction with the help of CPA and SPS

Consider a body of mass Ml (Heavy vehicle) moving with a velocity Ul, it under goes a perfectly elastic head on collision with another vehicle of mass M2 initi ly at rest (made by CPA and SPS)

Let the velocity of two vehicle after collision VI and V2 in the same direction, by the law of conservation of linear momentum,

mlul=mlvl +m2v2 (1)

Since the collision is perfectly elastic, the total kinetic energy of the two vehicles before the collision is equal to their total kinetic energy after collision l/2mlul ² =l/2mlvl ² +l/2m2v2 ²

mlul ² =mlvl ² +m2v2 ²

mlul ² -mlvl ² =m2v2 ²

ml (ul ² -vl ² ) =m2v2 ²

From equation (1)

mlul=mlvl+m2v2

m 1 u 1 -m 1 v 1 ^xa2 v2

ml (ul-vl) =m2v2

Dividing equation (2) by equation (3)

ml (ul ² -vl ² )/ ml (ul-vl) = m2v2 ² /m2v2

ul+vl=v2

Therefore U1=V2-V1

Multiplying equation (4) by Ml

mlul=mlv2-mlvl

Adding equation (1) and (5)

2mlul= (ml+m2) v2

v2=2mlul/ (ml+m2)

Substituting in equation (4)

vl= (ml-m2) ul/ (ml+m2)

Casel : If ml=m2, vl=0&v2=ul

In a perfectly elastic collision between vehicles of equal mass velocities interchange as a result of collision

Case 2: If ml«m2, vl=-ul&v2=0

The lighter vehicle rebounds from a heavier vehicle with t he same velocity.