Progress in a program aimed at obtaining operational and performance data on a prototype pre intake valve closing fuel ingestion (PreIVC) hydrogen-fueled automotive engine is reported. Information is included on the construction and testing of an unthrottled hydrogen delivery system and on flashback during starting. It was determined that the flashback was caused by runaway surface ignition. (LCL).

Includes all works deriving from DOE, other related government-sponsored information and foreign nonnuclear information.

The objective of this research effort is to obtain the design data-base covering performance, operational characteristics and emissions essential for making a rational decision regarding the selection and design of prototype hydrogen-fueled, air-breathing engines capable of being manufactured for general automotive use. To this end hydrogen-fueled internal combustion engines were divided into fourteen subgroups. An engine representative of each subgroup will be tested during the course of the three year program. The Project Program Plan calls for investigation of pre-intake valve closing fuel ingestion (Pre IVC) hydrogen-fueled engines during the first two years. Work accomplished during the second three months of the project is reported. Activities during the second quarter concentrated on: final apparatus debugging, engine break-in, preliminary testing to determine qualitative apparatus operating characteristics, rearranging of the proposal test schedule and performing of tests with engine 1 (carbureted, throttled, no H2O injection, no EGR and engine 4 (carbureted, unthrottled, no H2O injection, no EGR. The details of these activities are described.

The objective of this project is to address the problems identified in the literature and in the project proposal in order to obtain the data-base covering performance, operational characteristics and emissions essential for making a rational decision regarding the selection and design of prototype hydrogen-fueled, air-breathing engines capable of being manufactured for general automotive use. The project program plan calls for investigation of pre-intake valve closing fuel ingestion (Pre IVC) hydrogen-fueled engines during the first two of the three year project. With Pre IVC engines the fuel is introduced into the combustion chamber prior to closing of the intake valve. This is in contrast to Post IVC engines in which fuel is introduced in the cylinder after the intake valve closes. Post IVC engines are to be investigated during the third year according to the project program plan. This quartery report is a summary of the work accomplished during the first three months of the project. For completeness it contains information presented in the first two monthly reports.