elp for Webmasters « back to results for ""
Below is a cache of http://www.sae.org/students/presentations/powertrainc.ppt. It's a snapshot of the page taken as our search engine crawled the Web.
The web site itself may have changed. You can check the current page or check for previous versions at the Internet Archive. Yahoo! is not affiliated with the authors of this page or responsible for its content.

Powertrain & Calibration 101

John Bucknell

DaimlerChrysler

Powertrain Systems Engineering

December 4, 2006

Powertrain & Calibration Topics

Background

Powertrain terms
Thermodynamics
Mechanical Design
Combustion

Architecture

Cylinder Filling & Emptying
Aerodynamics

Calibration

Spark & Fuel
Transients & Drivability

What is a Powertrain?

Engine that converts thermal energy to mechanical
work

Particularly, the architecture comprising all the
subsystems required to convert this energy to work

Sometimes extends to drivetrain, which connects powertrain
to end-user of power

Characteristics of Internal Combustion Heat Engines

High energy density of fuel leads to high power to
weight ratio, especially when combusting with atmospheric oxygen
External combustion has losses due to multiple inefficiencies
(primarily heat loss from condensing of working fluid), internal combustion
has less inefficiencies
Heat engines use working fluids which is the simplest
of all energy conversion methods

Reciprocating Internal Combustion Heat Engines

Characteristics

Slider-crank mechanism has high mechanical efficiency
(piston skirt rubbing is source of 50-60% of all firing friction)