Application of biogas to supply the high compression ratio engine

Abstract

The study concerns the use of biogas as a fuel for supplying a modified self-ignition engine. As a result of the modifications made, the compression ratio was reduced and the engine was equipped with an ignition system and an electronically activated engine throttle. The changes have made it possible to burn biogas in a high compression ratio engine. The paper presents the results of research conducted on a low power cogeneration system with engine that drives an electrical machine cooperating with a 380/400 V network. The analysis includes, among other things, the possibility of producing electricity using biogas. The paper presents the influence of regulatory parameters such as the volume and composition of the supplied gas mixture and the degree of throttle opening on the obtained engine operation indicators and the driven electric machine. The tests were carried out in relation to the obtained ecological indicators depending on the concentration in the exhaust of such substances as: HC, CO, NOx.

Safety in the use of car gas fuel installations

“…Regardless of the type of primary power supply system used, the gas system must meet its level of original solutions, both in terms of technical advancement, as well as safety requirements and exhaust emissions [4]. Gas systems are divided into those installed in the cars at the factory, installed as an additional power supply system, somewhat "next to" the original factory system and singlefuel systems (for example city buses powered by CNG) [1,3]. There are great structural similarities in the construction of LPG and CNG installations [1].…”

“…Gas systems are divided into those installed in the cars at the factory, installed as an additional power supply system, somewhat "next to" the original factory system and singlefuel systems (for example city buses powered by CNG) [1,3]. There are great structural similarities in the construction of LPG and CNG installations [1]. Different types of gas installations generally use the same set of basic components conceptually: filler, tanks, pipes and fittings, components in the engine compartment.…”

“…A length of 3500 mm of wire is considered correct when it can withstand a bend test repeated 3000 times without breaking. After the bend test, the hose must withstand the internal pressure without showing any leakage [1,6].…”

“…The gas loss in the line is monitored for 2 days. A loss greater than 95 cm³ is not allowed [1,9]. Cables used in gas supply systems are also tested for fire resistance according to DIN 51622, DIN 12642 standards.…”

“…Cables used in gas supply systems are also tested for fire resistance according to DIN 51622, DIN 12642 standards. It is required to maintain the ability to self-extinguish, and during their combustion they should not emit harmful substances [1,9]. Gas pipes according to ISO 1431/1 must pass the ozone shield resistance test.…”