Refine Your Search

Search Results

Viewing 1 to 4 of 4
Technical Paper

Development of Electrical-Electronic Controls for a Gasoline Direct Injection Compression Ignition Engine

2016-04-05
2016-01-0614
Delphi is developing a new combustion technology called Gasoline Direct-injection Compression Ignition (GDCI), which has shown promise for substantially improving fuel economy. This new technology is able to reuse some of the controls common to traditional spark ignition (SI) engines; however, it also requires several new sensors and actuators, some of which are not common to traditional SI engines. Since this is new technology development, the required hardware set has continued to evolve over the course of the project. In order to support this development work, a highly capable and flexible electronic control system is necessary. Integrating all of the necessary functions into a single controller, or two, would require significant up-front controller hardware development, and would limit the adaptability of the electronic controls to the evolving requirements for GDCI.
Technical Paper

Protecting Development Engines during Controls Development and Calibration

2014-04-01
2014-01-1172
Advanced development engines are one-of-a-kind and expensive and generally have few, if any, spare parts available. These engines are particularly vulnerable to damage during control and calibration development due to unintended control actions from newly-generated algorithms, errant operator control commands, or lack of understanding of control limits for safe operation. Engine damage can result in significant program delays and expenses. Delphi is developing control systems and calibrations for the vehicle implementation of an experimental engine concept which incorporates a new high efficiency combustion process. Many of the algorithms within the control structure are new and untested, and therefore represent significant risk to these engines. The large amount of data displayed on computer test control screens makes human monitoring of all parameters nearly impossible, especially when display windows are layered on top of one another.
Journal Article

Ion-Sense-Based Real-Time Combustion Sensing for Closed Loop Engine Control

2013-04-08
2013-01-0354
The cycle-to-cycle and cylinder-to-cylinder variations that occur in a spark ignited engine create the opportunity for monitoring combustion in real time to provide useful benefits for engine control. Reduction of variation and operation of the engine at closer-to-optimum conditions is possible if real time feedback of the combustion process is available. An in-cylinder pressure sensor with pressure-based control algorithms is one method of monitoring the combustion process. However, such a solution presents new challenges of an additional cylinder penetration location, sensor packaging and added cost. A substitute for the in-cylinder pressure sensor is a device which measures the flame conductivity, commonly known as an ionization current sensor. It can be integrated with the spark plug in the case of SI engines, or with the glow plug in the case of compression ignition engines.
Journal Article

High Performance Stop-Start System with 14 Volt Belt Alternator Starter

2012-04-16
2012-01-1041
As the industry strives to achieve improved fuel economy, stop-start systems for internal combustion engines are receiving additional focus. Studies and system proposals have been made for various electrical configurations ranging from 12 volts to 42 volts and higher [1, 2, 3]. Both cranking motor and belt alternator starter configurations have been proposed, with some concerns regarding the customer acceptance of the cranking motor solution [1] which were subsequently addressed [3]. Typically, 14 Volt Belt Alternator Starter (BAS) applications are limited to 1.6 liter gasoline (0.4 liter per cylinder) and 1.4 liter diesel (0.35 liter per cylinder) engines due to BAS torque output constraints. Some previous work extended this range to 0.7 liter per cylinder by utilizing a boosted supply voltage and auxiliary energy storage device [1].
X