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Mechanical Regenerative Braking for Vehicles.
[Category : - DESIGN PATENTS- Biking- RENEWABLE ENERGY]
[Viewed 354 times]
Recovering braking energy loss and deploying it to do useful work
Specifically in stop and go conditions in light and heavy vehicles without using electrical regenerative processes. In light vehicles such as bicycles electrical regenerative process is in effective . Only Mechanical Regenerative provides upto 70% energy recovery.
The invention is a device that enables regenerative braking by using spring as energy storage device.
Distinction between Electrical and Mechanical Regenerative Braking:
In vehicles kinetic energy is dissipated as heat in conventional friction braking.
In electric braking the energy is recovered by using the motors as generators. This method requires movement and therefore does not work in Stop and Go traffic.
What problem it solves:
The current invention works with upto 70% energy recovery in Stop and Go traffic as opposed to nearly 2% energy recovery with electrical regenerative braking in similar traffic pattern.
How does it do this?
This is possible by using spring force to stop the vehicle as opposed to friction in conventional brakes. The constraint in using a spring is that upon discharge of the spring the vehicle will move in reverse direction, The patented transmission allows the energy release in forward direction. Since in Stop and Go traffic the energy that is stored is limited , a spring with limited storage is appropriate as it works with minimum losses. Alternate store and release in electrical process would require Super Capacitors that are expensive. Spring does this inexpensively and efficiently.
Benefit:
Electrical regenerative braking has a maximum efficiency of 20% that when there is a prolonged charging of batteries in minutes. Spring regenerative braking has maximum efficiency of 70% with instantaneous charge and discharge capability.
Mechanical regenerative braking provides benefit in fast start stop conditions. But it has limited storage.
Electrical regenerative braking provided benefit in prolonged braking situations and has greater energy storage.
Thus when both are applied in conjunction maximum energy recovery and efficiencies are possible.
The invention can increase time between charging battery and increase battery life when used in conjunction with electrical regenerative braking.
Structural explanation of the invention
Transmission that is a bridge between bicycle movement to a spring that is used to store the bicycle momentum as force in a spring. It employs disk brake to activate the bridge to provide the spring to create the braking force. The bicycle brakes concurrently deforms the spring. When the brake lever is released the disk brake is free to move under the influence of the spring. Conventionally the bicycle would move in the reverse direction as the spring returns to normal neutral position. The patented transmission bridge automatically reverses the discharge direction so that the bicycle moves forward.
The bridge through cam disconnects from the bicycle movement as the spring returns to it's normal neutral position allowing the bicycle to move forward free of influence of the spring. There is mechanism to allow the bicycle to move even after the spring is fully charged. At that point the excess energy is allowed to bleed under friction force. The transmission has modes that allows the user to store the energy without releasing on release of the brake lever through a ratchet latch arrangement. The user unlatches the spring through separate lever to accelerate the bicycle when he so intends.
Patent publications:
US 11852206
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