No abstract

Oil theft refers to the exploitation of crude oil or refined petroleum products for criminal purposes. In Mexico, oil theft—referred to as huachicolero—is endemic and widespread. By framing it within the energy security and transition context, this paper offers a new perspective on the problem of oil theft in Mexico. Focusing on crude oil and refined petroleum, the paper demonstrates that Mexico’s energy security—as framed around the 4As (availability, accessibility, affordability, and acceptance)—has deteriorated over the past decade. Application of the 4As framework in the Mexican context shows that the increasing frequency of oil theft has contributed to this deterioration. The proposed solution to the energy security and oil theft problems is centred on Mexico moving from gasoline and diesel to electrification in the transportation sector. The paper demonstrates that, while transport electrification in Mexico has been lagging behind other countries, recent developments in the country point to growing momentum among the country’s political and business elites, in tandem with US partners, in support for the energy transition. Areas where further emphasis should be placed to accelerate Mexico’s energy transition in the transportation sector are identified. Finally, the feasibility of and potential limitations associated with implementing the transition are evaluated.

Water injection strategy is considered a promising technique to improve the performance of boosted engine and reduce the NOx emission via the latent heat of water vaporization. Numerous research on water injection has been conducted on in-cylinder and intake port water injection. However, the water injection focusing on the spark ignition (SI) engine exhaust system is still lacking. This study proposed a pre-turbocharger turbine water injection (PTWI) concept to reduce the turbine inlet temperature. This was done so that the stoichiometric engine operation could be achieved at a medium–high load and engine speed without resorting to a fuel enrichment strategy to reduce the exhaust gas temperature. This study aims to investigate the effect of injecting water into the exhaust gas at the pre-turbine of a turbocharged spark ignition engine. This study experimented on a 1.3-L 4-cylinder turbocharged engine to collect engine data for computational fluid dynamics (CFD) baseline model validation. A one-dimensional engine model was then developed based on the 1.6-L 4-cylinder turbocharged engine experiment using AVL BOOST software. The CFD model was used to investigate the effects of water injection pressure, pipe diameter, and water injector location. The CFD results showed that a 50 mm connecting pipe with 4 bar of injection pressure gives the largest reduction in exhaust temperature. The CFD results were then applied to the one-dimensional engine model. The engine model simulation results showed that the fuel consumption could be reduced up to 13% at 4000 rpm during wide-open throttle and 75% engine load. The PTWI is a new approach, but this study has proved the potential of using water injection at the pre-turbine turbocharger to reduce the fuel consumption of a turbocharged SI engine.