Modestly modified automotive engine powered generator systems to substantially improve capability for providing renewable electricity powered grid reliability and energy storage are disclosed. The use of these engines to improve capability for non-grid electricity generation, including affordable and clean fast charging of electric vehicles, is also disclosed. In one embodiment, these automotive engines use high RPM and stoichiometric air fuel ratio operation so as to provide the advantages of substantially reduced cost and NOx emissions. These engines also have multifuel capability that provides highly flexible use of low carbon fuels (such as hydrogen, methanol and ammonia) as well as the use of present fuels that are widely available. When these low-carbon fuels are produced with excess electricity from the grid and supplied to the grid when there is an electricity-supply shortfalls, they can serve as a means of energy storage.

In a generator including an engine, a rotating electric machine, and a cooling fan that rotates integrally with a rotor of the rotating electric machine, the cooling fan includes a plurality of fans disposed at an interval in an axial direction of the fan, and a cylindrical body that extends in the axial direction of the cooling fan with a cylindrical cross section in an inner peripheral space of an upstream fan and is disposed more on the upstream side than a downstream fan.

In a generator including an engine, a rotating electric machine, and a cooling fan that rotates integrally with a rotor of the rotating electric machine, the cooling fan includes a plurality of fans disposed at an interval in an axial direction of the fan, and a cylindrical body that extends in the axial direction of the cooling fan with a cylindrical cross section in an inner peripheral space of an upstream fan and is disposed more on the upstream side than a downstream fan.

A shroud includes a first shroud that covers a first side face to which a muffler is adjacent among four side faces that an engine has, a second shroud that covers a second side face adjacent to the first side face and a third side face, and a third shroud that sections a muffler space for housing the muffler with the first shroud, the first shroud and the second shroud form an upstream side air guide path that makes cooling air flow around the engine, and the muffler space is connected to a downstream side of the upstream side air guide path.

In a generator including a fuel tank that stores liquid fuel, the fuel tank includes a fuel inlet and a breather passage formed by a pipe member through which an inside and outside of the fuel tank communicate with each other, and the pipe member is provided with a valve that blocks the breather passage at normal time and opens the breather passage by a pressure of a predetermined value or higher.

An outer casing includes an under panel disposed on a bottom surface, and the under panel integrally includes a reinforcing part that supports an engine. By the reinforcing part, strength and rigidity can be secured without using other parts, a height dimension of the reinforcing part can be suppressed to be low compared to the case of separately providing a support member as in the conventional art, and a generator can be made light in weight and miniaturized. In addition, since a structure is such that the engine is supported by one under panel, need of fastening the other parts is eliminated, there is no risk of generating a gap between the parts, and noise can be reduced.

Ruggedized generators can operate using both medium and heavy fuels and output at least 5 kWe of power, yet are quiet, compact in size, and reliable.

A system, in one embodiment, may include a portable unit having an engine, a generator coupled to the engine, a compressor coupled to the engine, and a priority load controller. The controller may be configured to adjust various loads on the engine, the generator, or the compressor, or a combination thereof, in response to a priority control scheme. A computer-implemented method, in another embodiment, may include adjusting power output to various loads on an engine, a welding generator coupled to the engine, or an air compressor coupled to the engine, or a combination thereof, in a portable welding unit in response to a priority control scheme.

A system, in one embodiment, may include a portable unit having an engine, a generator coupled to the engine, a compressor coupled to the engine, and a priority load controller. The controller may be configured to adjust various loads on the engine, the generator, or the compressor, or a combination thereof, in response to a priority control scheme. A computer-implemented method, in another embodiment, may include adjusting power output to various loads on an engine, a welding generator coupled to the engine, or an air compressor coupled to the engine, or a combination thereof, in a portable welding unit in response to a priority control scheme.

The invention relates to a glass substrate including a stack of coating layers having control properties, in which stack comprises at least one niobium metal layer located between a layer of a dielectric material selected from Si.sub.3N.sub.4 or TiOx and a layer of a protective metal material selected from TIN or Ni—Cr, conferring solar control and heat resistance properties on the glass substrate.