A Complete Online Guide For Every Mechanical Engineers
Fuel Cell Technology The fuel cell vehicle (FCV) is the nearest thing yet to an “ultimate eco-car” that offers solutions to energy and emissions issues. FCVs are powered by fuel cells, which generate electricity from hydrogen, which is not only environmentally friendly and highly energy-efficient, but can also be produced using a variety of readily…
Ultimate Eco Car Challenge Continuous improvement in conventional engines, including lean-burn gasoline engines, direct injection gasoline engines and common rail direct-injection diesel engines, as well as engines modified to use alternative fuels, such as compressed natural gas (CNG) or electricity (for Electric Vehicle). Engineers may disagree about which fuel or car propulsion system is best,…
Hybrid Synergy Drive What Is a Hybrid System? A hybrid system combines different power sources to maximize each one’s strengths, while compensating for the others’ shortcomings. A gasoline-electric hybrid system, for example, combines an internal combustion engine’s high-speed power with the clean efficiency and low-speed torque of an electric motor that never needs to be…
Today, various automobile parts are made from plastics, which are reliant on the supply of petroleum. There is a need to find new materials for these parts so we can promote a post-petroleum era and reduce CO2 emissions. The automobile industry’s first plant-derived bio-plastic, which can be injection-molded to ensure thermal and shock resistance and…
DISI includes a whole new set of innovations for gasoline engines. To mention a few, direct injection (including cooling the air-gasoline mixture), a new combustion chamber geometry, variable timing technology, and nanotechnology for the catalyst. This all makes the engines consume 20 percent less while getting 15 to 20 percent better performance. Further developments for…
Electronic control common rail type fuel injection system drives an integrated fuel pump at an ultrahigh pressure to distribute fuel to each injector per cylinder through a common rail. This enables optimum combustion to generate big horsepower, and reduce PM* (diesel plume) and fuel consumption. Bosch will supply the complete common-rail injection system for the…
This hydrogen engine takes advantage of the characteristics of Mazda’s unique rotary engine and maintains a natural driving feeling unique to internal combustion engines. It also achieves excellent environmental performance with zero CO2 emissions. Further, the hydrogen engine ensures performance and reliability equal to that of a gasoline engine. Since the gasoline version requires only…
Weight has a significant effect on a vehicle’s basic ability to go, corner and stop. Furthermore, environmental and economic factors such as fuel economy are also strongly influenced by vehicle weight. Mazda strives to minimize the weight of every car it develops. The all-new Mazda2 (Demio) launched in July 2007 is a perfect example. During…
Highlights of the SKYACTIV technologies: SKYACTIV-G: a next-generation highly-efficient direct-injection gasoline engine with the world’s highest compression ratio of 14.0:1 SKYACTIV-D: a next-generation clean diesel engine with the world’s lowest compression ratio of 14.0:1 SKYACTIV-Drive: a next-generation highly-efficient automatic transmission A next-generation manual transmission with a light shift feel, compact size and significantly reduced weight…
What is the function of EGR valve EGR means Exhaust Gas Recirculation. The main function of EGR is to control NOx emission from the engine. At elevated temperature (during long run & full condition)if due to some reasons engine gets heated up beyond certain level… it produces NOx emission. In order to avoid this pollution…
In automobile catalytic converters, the surface conditions of the precious metals—the catalyst materials—have a large effect on their ability to clean emissions. Conventionally, precious metal particles are adhered to a base material. However, heat from the exhaust gas causes the particles to collect together and agglomerate to form larger particles. This reduces the surface area…
The key to improving fuel efficiency lies in raising an engine’s thermal efficiency. This can be done by increasing the expansion ratio. The expansion ratio is the amount of work the engine does each time the air-fuel mixture in the cylinders detonates. However, in conventional engines the expansion ratio is the same as the compression…
In developing the DISI engine, we aimed to cool the interior of the cylinder as much as possible by promoting fuel vaporization and uniform mixing of atomized fuel and air. This produces a high charging efficiency of the air-fuel mixture and a high compression ratio, which results in significant improvements in both torque and fuel…
Idle stop systems save fuel by shutting down a vehicle’s engine automatically when the car is stationary and restarting it when the driver resumes driving. Especially in urban areas, drivers often let their car’s engine idle at traffic lights or when stopped in traffic jams. Switching off the engine to stop it idling in these…
