Issues often stem from limitations in technical capability rather than inherent flaws in diesel engine technology itself; such problems can be resolved through technological advancement.
First, every type of powertrain has its own appropriate place and timeline for development. While failing to research and develop new technologies-such as gas-fueled, hybrid, electric, and fuel-cell vehicles-would lead to falling behind, it is equally incorrect to place one-sided emphasis on the potential for their immediate, large-scale adoption or to position them in opposition to the continued development of conventional powertrains. Second, gas-fueled engines require a balanced assessment. Although they effectively meet current emission standards and play a vital role in optimizing energy consumption patterns, natural gas engines emit higher levels of total hydrocarbons (primarily methane) than diesel engines and face significant challenges in complying with Euro IV emission standards. Third, emissions and energy conservation are equally important and must be considered holistically; energy conservation is not merely about saving petroleum resources but is also a critical environmental issue. Consider the global concern regarding the greenhouse effect: diesel engines offer superior fuel efficiency and produce far lower carbon dioxide emissions than gasoline engines, capable of reducing greenhouse gas emissions by over 45%.
1. Key component technologies: Such as fuel injection systems (pumps and nozzles) and turbocharging/intercooling technologies.
2. Fuel quality: High-quality, low-sulfur diesel is a prerequisite for diesel engines to meet increasingly stringent emission regulations.
3. Electronic control technology: Electronic control systems are crucial for optimizing and enhancing the overall performance of diesel engines.
4. Key emission after-treatment technologies: Such as Exhaust Gas Recirculation (EGR), particulate matter trapping, and NOx catalytic conversion.
5. Engine development and integration technologies: Such as the matching and optimization of fuel, air intake, and combustion systems, as well as technologies specific to heavy-duty vehicle and passenger car diesel engines.
6. Diesel engine manufacturing, production processes, and materials technologies.
