AUTOTRONICS:IMPROVING VEHICLE PERFORMANCE

PALKAR OMKAR SANTOSH

TE MECHANICAL

ROLL NO 10ME032

Guided By

Prof. R.R.Mane

AUTRONICS IN A VIEW

INTRODUCTIONAUTOTRONICS= AUTOMOBILE + ELECTRONICSfirst electronic part in an automobile was called an ECU

(Engine control unit)Analysts estimate that more than 80 percent of all automotive

innovation now stems from electronics

HISTORY:

TIMELINE:1970’s: Introduction of electronics for engine controls1980’s: Anti-lock braking introduced Early 1990’s: Airbags become standard Late 1990’s: Rapid expansion of body electronics – seat

motors (bodyComputers), instrument panel lighting, auto locking

systems and keyless entry Early 2000’s to date: infotainment, including sophisticated

audio and video ; Signals sent via satellite (such as the OnStar System); GPS and mapping Capabilities; satellite radio

Late 2000’s: Steer-by-wire, wireless connectivity

This seminar describes automobile applications of autotronics in following domains:

• Braking system

Steering system

Suspension system

Transmission system

Engine (fuel intake)

Braking system

EBS increases traffic safety through

reduced stopping distance and improved

brake stability.Functions In ECB:

Anti-lock braking system (ABS):Traction control system (TCS)Brake lining wear control

ABS:ABS is an acronym for anti-lock braking system. First

developed and patented in 1936, ABS is actually derived from the German term "anti blockier system."

Anti-lock brakes are designed to prevent skidding and help drivers maintain steering control during an emergency stopping situation

Difference between ABS & Traction ControlABS

manage the grip of the tires for braking maneuverTraction Control

manage the grip of the tires for accelerating maneuver

STEERING SYSTEM

The self-alignment estimation

control uses both the EPS sensor

information and internally

programmed EPS control Speed sensitive steering system:

Speed sensitive steering system is used to control the power steering pump pressure in relation to vehicle speed. Below 10mph (16km/h) the computer operates the steeringThis action reduces the steering effort during low speed

maneuver and parking.

Electrically powered steering

uses an electric motor to drive

either the power steering

hydraulic pump or the steering

 directly.steering sensor" is located on the input shaft where it enters the gearbox housing.An interface circuit that same housing converts the signals from the torque sensor and rotation sensor into signals.The vehicle motion estimation control uses the steering angular

velocity information internally programmed in the EPS system.This control helps improve yaw damping of the vehicle at higher

speeds on the road.SensorsAccelerating sensor ,displacement sensors, Steering wheel position

SUSPENSION SYSTEM

suspension systems in most vehicles on the road today are passive.Shock absorbers help to dissipate the energy applied to the springs and

damp the oscillations .Active Roll Control Systems :Vehicles lean when cornering due to the weight transfer

imposed by lateral acceleration. Factors contributing to the roll angle of the vehicle include vehicle height and suspension stiffness.

ARC system uses hydraulic and electronic technology to the vehicle roll angle in cornering, which improves handling.

The active roll control system containsControl module, Accelerometer, Speed sensor, Fluid reservoir, Electrohydraulic pump, Pressure control valve, Directional control valve, A hydraulic actuator in both the

front and rear stabilizer bars .

TRANSMISSION SYSTEMMainly it controls the shifting process of the gears.Electronically controlled transmissions were introduced on

BMW products in 1986 on 5 and7 series vehicles.The TCM also adapts to changing conditions within the

transmission by monitoring slip ratios .The TCM controls the operation of the Lock-Up Torque

Converter which further increases economyADVANTAGES: Increased fuel economy Improved shift comfort Increased driving safety

Electronic Fuel Injection

EFI system electronically

meters the fuel so that the

exact amount needed is provided

to the engine.EFI uses to fuel to power the engine by pumping it forcibly by using high pressure through a small nozzle or valve. A high-pressure fuel pump that produces high fuel pressures (5 to 12 MPa)

ADAPTIVE CRUISE CONTROL

It automatically adjusts the

vehicle speed and distance to

that of a target vehicle.ACC uses a long range radar sensor to detect a target vehicle up to 200 meters in front of vehicle.As per standard cruise control the driver can override the system at any time.Another advantage of this system is that the driver will not

exceed the speed limit on the highway.

Airbags

The air bag technology is based on electronic sensors that measure the amount of quick deceleration through an accelerometer

The new calculations will take into account the position of the seats, the use of a seat belt and the weight of the occupants.

Latest research

Active bumper system, active hood lift system, vehicle to vehicle communication

Camber thrust in F 1 vehiclesGlobal Positioning SystemRain sensing wipersAdaptive light system

CONCLUSIONwe briefly presented current and future vehicular

electronics system

an approach that uses modern technique to solve most of the local vehicular problems.

the automobile industry and will likely continue as people always want and expect more from their cars.

THANK YOU !!