Title: Community transport experiences, in connection with diesel-LPG mixed operation buses belonging to the category of heavy vehicles

Authors: I. Lakatos

Addresses: Department of Road and Rail Vehicles, Széchenyi István University, Egyetem tér 1, H-9026, Győr, Hungary

Abstract: Various international literature sources and papers address the issue of the theoretical implementation of using liquefied petroleum gas (LPG) gas as catalyst material injected into the carburetor system of diesel engines and its positive impact on the characteristic features of the engine and its emission. In Europe, for example, Landi-Renzo, one of the biggest Italian companies dealing with traditional gas systems, is developing a compressed natural gas (CNG)-diesel system. The present paper outlines the operational characteristics of a diesel-LPG dual operating system based on our own experiments and measurements which have been carried out on the transformed buses of the Southern Transdanubian Transportation Centre (DDKK, Hungary). In the process of evaluation two aspects were taken into consideration: the impact on emission and that on fuel consumption. Of course, the tests can be extended to wider areas, which take into account both vehicle structures and the environment (Palkovics and El-Gindy, 1993; Palkovics et al., 1996; Shokouhfar et al., 2016).

Keywords: LPG; liquefied petroleum gas; LPG-diesel mixed operation; fuel consumption; exhaust emission; LPG-diesel operation of buses; measurement methods.

DOI: 10.1504/IJHVS.2025.145131

International Journal of Heavy Vehicle Systems, 2025 Vol.32 No.2, pp.137 - 162

Received: 02 Feb 2024
Accepted: 24 Mar 2024
Published online: 20 Mar 2025 *

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