Literature Review of Hybrid Vehicle

Braking Design System

By Nur Athirah Khairuddin

This literature review will analyze and interpret selected previous published

articles related to the “Braking Design System” in a hybrid & electric vehicle focusing on

regenerative braking. Regenerative braking system works when a vehicle brake, the

vehicle’s electric motor functions as a generator where it recovers as much kinetic

energy as possible and store it as electrical energy.

According to a research of “Regenerative Braking System” by Michael Resciniti,

Adi Peshkess and Peter Leonard, there are 15 design requirements that need to be met

to produce a product that is both feasible and optimal. First, the device must be able to

store energy while braking and innovative gear system that is simple enough should be

come up to release the energy back to the user. Next, the desired device must be able to

be fit in the tested vehicle and it is important that the device is to be a the right weight

to be driven by the tested vehicle because more power is needed to move the tested

vehicle if there is extra load present. By using dynamic analysis, the component can be

optimized for a good stopping range because this device shall be used in real life

situations. Furthermore, good spring features are also needed, as the force required to

stop is dependent on the stopping range as well as providing comfort for the drivers.

Finally, the material needed must be inexpensive and affordable to make the end

product desirable and at the same time the device is able to make a profit.

Based on a research report from “Challenge X: Regenerative Brake Pedal Design”

by Ryan Carnago, Samuel Koch, Brendan Pawlik and Paul Smith, the team has been

given a task to design a brake pedal positioning sensor which translates the brake pedal

position to the ECU in order to control the regenerative braking system. In order to

mover forward, the regenerative system reverses the direction of the flow going in the

pump that normally draw pressure from the high end accumulator to the low pressure

reservoir.