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Common sense about yacht engines

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Common sense about yacht engines

(1) Engine type According to installation type:       Inboard engine: The engine is installed inside the hull and used by large yachts.       Inboard and outboard engine: The engine is installed on the inside of the hull, and the propeller is installed on the outside of the hull. For small and medium boats.       Outboard motor: a machine that is not permanently fixed on the ship and needs to be disassembled and moved to shore for propulsion at any time. Because of its small size, high power and high speed, it is widely used in high-speed boats, fishing boats and work boats.       Jet engine: suck water into the engine, accelerate the jet to the rear to gain power, no rudder is needed, just change the jet direction to change the direction of the ship. According to the fuel used:       Gasoline engine: Compared with diesel engine, it is smaller in size, lighter in weight, low in noise and easy to repair. It is relatively easy to start because gasoline has a low ignition point and low thermal efficiency. The thermal efficiency is converted into kinetic energy and the journey is short. The kinetic energy is converted into speed, which is easy to play, quick to accelerate and easy to control.       Diesel engine: Compared with gasoline engine, the advantage of diesel engine is that diesel is cheap, economical and has fewer failures. From the horsepower point of view, diesel engines have more horsepower than gasoline engines and are more widely used on ships. Diesel engines have a relatively long service life and relatively low operating costs. Diesel has high hot spots, high thermal efficiency, long travel time for thermal efficiency to be converted into kinetic energy, slow kinetic energy development and acceleration response, but strong ability to convert kinetic energy and increase torque, which is more suitable for driving heavy hulls and ships with larger loads. (2) Engine performance       The engine is like the "heart" of a yacht. Reflecting the quality of the engine mainly depends on the power and economy, that is to say, the engine must have good power, good acceleration and low fuel consumption. There are many factors that affect engine power and fuel consumption, among which the most influential factors are displacement, compression ratio, and valve train.       The performance of an engine on a yacht cannot be evaluated solely by speed. On a yacht, the performance is a fusion of comfort, stability, handling, fuel saving, and speed. (3) Engine brand       The choice of engine brand mainly depends on whether the engine manufacturer has a good service network in China, because no matter how good the engine is, service is inseparable. At present in China, the best choice should be, the main selection object is the engine of large and medium-sized yachts; the engine of small yachts can choose       Sweden Volvo Engine (Volvo Penta) ——Excellent overall performance and fuel efficiency, complete power system, lightweight design, low noise, low vibration, each genuine Volvo Penta part is designed and developed together with the whole machine , Easy to install and maintain. First-class after-sales service. The engine power range produced is 10-2000 horsepower.       American Cummins engine (Cummins)-the perfect combination of fuel economy, durability, reliability, light weight and compact structure. Easy maintenance.       American Mercury engine (Mercury)-good explosiveness, low fuel consumption, unique rubber shock absorber installation system.       Japan Yamaha (Yamaha)-stable performance, strong horsepower, low fuel consumption, less pollution, anti-rust and anti-corrosion system to increase the durability of the outboard motor.        German MAN engine-using the latest technology. For example, high power injection through multi-hole nozzles. Or pressurization and air cooling, which together with high pressure ensure low pollution combustion process. MAN diesel engine is light in design, powerful in power, durable, low in power consumption, and can be in a working-ready state.       American Caterpilar engine (Caterpilar)-has advanced power plant. The speed can be automatically controlled when the load is small or no load, automatically reducing the engine speed and reducing fuel consumption. Low noise, low vibration, low exhaust gas emission, environmental protection and high efficiency, stable and reliable performance.       Japanese Yanmar engine (Yanmar)-Provides powerful power and torque while maintaining the lowest fuel consumption, easy to operate, and durable

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