Traction Control System for Extended-Range Electric Vehicles



Table of Contents

Introduction1

Traction Control System in Extended-Range Electric Vehicles2

Methodology4

Research approaches5

Sampling Techniques9

Non probability sampling method9

Probability sampling method11

Research design15

Reliability and validity17

Research Philosophy18

Approach of Philosophy19

Timetable19Traction Control System for Extended-Range Electric Vehicles

Introduction

Traction control system is a system that belongs to a group of systems whose main task is to prevent excessive slippage during acceleration of the vehicle wheel (wheel-spin reveals them). Indirectly, these systems may also affect the properties to improve vehicle traction during cornering motion. Most systems operate only at low vehicle speed (up to 40 km/h) but are also built versions for the entire operating speed range. It is next to the ABS-e active safety system (Teraoka, 1999). The system also affects the reduction of tire wear and fuel. This system uses the ABS system components.

This system is an automobile safety measure launched by Bosch in 1986 and designed to prevent loss of adhesion of the wheels spinning when the driver exceeds the acceleration of the vehicle or the firm is very slippery (e.g. on ice). In general it is also known as electrohydraulic systems. It works such using the same sensors and actuators which employs the ABS system; antilock braking, controls the acceleration of the wheels of the vehicle skidding shaft, i.e. rotates faster than it should, and in such case, the system acts to reduce the torque and thus recover strong adhesion between tire by the following measures;

Spark retard or suppress one or more cylinders.

Reducing fuel injection in one or more cylinders.

Applying brakes to the wheel that has lost grip.

Depending on the manufacturer of the car, such a system may have different names. One of the more common terms is ASR (Acceleration Slip Regulation). ASR is used in vehicles produced by the company i.e. Mercedes-Benz, Volkswagen, Fiat and Rover. Corporations such as Ford, Saab, Mazda and Chevrolet (Daewoo) also make use of TCS (Traction control system).

In road vehicles, traction control has traditionally been a safety issue for high performance cars, which need to be accelerated very significantly to prevent the wheels from slipping, especially in wet or snowy conditions. In recent years, traction control systems have rapidly become a system equipped in all types of vehicles due to their advantages in safety. In auto racing, it allows maximum traction when accelerating after a turn, without wheel slips (Vijayagopal, 2011).

In SUVs, traction control is used in place of or in addition to the limited sliding mechanics. This is often implemented with an electronic limit slip, as well as other computer engine controls transmission. The wheel slip is less with smaller brake performances, bypassing more torque to the wheels that are slipping. This form of traction control has an advantage over a locking differential in a fact that the direction and control of the vehicle is easier, so that these systems can be continuously activated. This creates less stress on the transmission which is very important in vehicles with an independent suspension (usually weaker than solid shafts). Moreover, only half of the turns are ...