목차

1 Introduction . 1
1) Background of the research 1
2) Literature review 4
3) Purpose of the study 8
4) Content of research and method 9
2 Test apparatus and method 12
1) Test setup 12
(1) Research hydrogen engine with VCR and MCVVT 12
(2) Measurement of In-cylinder wall surface temperature 14
(a) Thin film instantaneous temperature probe 14
(b) Calibration of instantaneous temperature probe 16
3) EGR(Exhaust Gas Recirculation) system 18
4) Test method 19
3. Investigation on transient process and cause of backfire in hydrogen-fueled HCCI engine 30
1) Backfire phenomena in hydrogen-fueled HCCI engine 30
(1) Transient process of backfire occurred in hydrogen-fueled HCCI engine 30
(2) Comparison of backfire phenomena between hydrogen-fueled HCCI engine and HCSI engine 32
(3) Similarity of backfire phenomenon in hydrogen-fueled HCCI engine depending on the operating conditions 34
2) Investigation on cause of backfire occurrence in hydrogen-fueled HCCI engine 39
(1) Characteristics of wall-surface temperatures of combustion chamber during knock-backfire transient process 40
(2) Investigation on backfire phenomenon through instantaneous temperature of in-cylinder wall 42
4. Possibilities of backfire control in hydrogen-fueled HCCI engine 63
1) Backfire control in hydrogen-fueled HCCI engine by means of retarding intake valve opening timing 63
(1) Possibility of backfire control by means of retarding intake valve opening timing over TDC 63
(2) Overall characteristics depending on backfire control by retarding intake valve opening timing 66
2) Backfire control in hydrogen-fueled HCCI engine by means of application of EGR 68
(1) Possibility of backfire control by means of application of EGR 68
(2) Overall characteristics depending on the backfire control by EGR 71
5. Conclusion 95
Reference 99