Manufacturer | Aprilia |
---|---|
Parent company | Piaggio |
Production | 1992 - jan 2021 |
Class | Scooter |
Engine | 49.38 cc (several different engines used) |
Top speed | 45-50 km/h restricted, up to 85-90 km/h derestricted. Optional gear up kits available, they can lift the maximum speed up to 130 km/h. |
Transmission | CVT |
Suspension | Front telescopic fork, rear hydraulic monoshock |
Brakes | 190mm disks front and rear |
Tires | 13" wheels 130/60 tyres |
Wheelbase | 1290 mm |
Dimensions | L: 1860 mm W: 705 mm |
Seat height | 765 mm |
Weight | 108 kg (wet) |
Fuel capacity | 7.45 L |
Oil capacity | 1.2 L |
Fuel consumption | 110- 145mpg |
Introduced in 1992, more than 800,000 units have been sold, bucking the trend for less use of two-stroke engines. Aprilia claims several firsts for the SR50 in the scooter market, including 13 inch wheels, liquid cooling, double disc braking, and a direct injection engine.
The performance-oriented suspension, tires, and engine are consistent with its styling. Colours and graphics vary by country. The digital instrument panel gives readings for speed, clock, odometer, trip counter, fuel level, coolant temperature and battery voltage.
The SR50 has used a variety of engines, sourced from Morini, Piaggio and Minarelli. It conforms to EURO 3 emission standards. The DiTech model used an injection engine, with technology from Orbital. The current model uses a Dell'Orto carburetor. The powerful engines allow reaching very high speeds for a scooter, the SR50 can reach 90 km/h in its standard configuration after being derestricted.
The SR50 DITECH uses the Synerject gasoline direct injection (GDI) system developed jointly by the Orbital Corporation and Siemens AG. The system uses a crank-driven air compressor to deliver air to the cylinder head at a pressure of 5 bars (500 kPa; 73 psi), thereby avoiding the use of carburation; the cylinder walls are not wet with gasoline, only with lubricating oil. After the port is closed and the air is compressed by the piston, gasoline is injected by an atomizer like a spray nozzle mixed with and propelled by the highly compressed air, into the main combustion chamber where, after the injection port closes, and the piston is still rising, it is ignited in the compressed main charge of air. The use of direct injection and stratified charge allows the DITECH engine to meet Euro 2 standards. [1]
The compression ratio is the ratio between the volume of the cylinder and combustion chamber in an internal combustion engine at their maximum and minimum values.
The diesel engine, named after Rudolf Diesel, is an internal combustion engine in which ignition of the fuel is caused by the elevated temperature of the air in the cylinder due to mechanical compression; thus, the diesel engine is called a compression-ignition engine. This contrasts with engines using spark plug-ignition of the air-fuel mixture, such as a petrol engine or a gas engine.
A two-strokeengine is a type of internal combustion engine that completes a power cycle with two strokes of the piston during one power cycle, this power cycle being completed in one revolution of the crankshaft. A four-stroke engine requires four strokes of the piston to complete a power cycle during two crankshaft revolutions. In a two-stroke engine, the end of the combustion stroke and the beginning of the compression stroke happen simultaneously, with the intake and exhaust functions occurring at the same time.
A stratified charge engine describes a certain type of internal combustion engine, usually spark ignition (SI) engine that can be used in trucks, automobiles, portable and stationary equipment. The term "stratified charge" refers to the working fluids and fuel vapors entering the cylinder. Usually the fuel is injected into the cylinder or enters as a fuel rich vapor where a spark or other means are used to initiate ignition where the fuel rich zone interacts with the air to promote complete combustion. A stratified charge can allow for slightly higher compression ratios without "knock," and leaner air/fuel ratio than in conventional internal combustion engines.
A four-strokeengine is an internal combustion (IC) engine in which the piston completes four separate strokes while turning the crankshaft. A stroke refers to the full travel of the piston along the cylinder, in either direction. The four separate strokes are termed:
In spark ignition internal combustion engines, knocking occurs when combustion of some of the air/fuel mixture in the cylinder does not result from propagation of the flame front ignited by the spark plug, but when one or more pockets of air/fuel mixture explode outside the envelope of the normal combustion front. The fuel-air charge is meant to be ignited by the spark plug only, and at a precise point in the piston's stroke. Knock occurs when the peak of the combustion process no longer occurs at the optimum moment for the four-stroke cycle. The shock wave creates the characteristic metallic "pinging" sound, and cylinder pressure increases dramatically. Effects of engine knocking range from inconsequential to completely destructive.
A Nitrous Oxide Engine, or Nitrous Oxide System commonly referred to and known as NOS, is an internal combustion engine in which oxygen for burning the fuel comes from the decomposition of nitrous oxide, N2O, as well as air. The system increases the engine's power output by allowing fuel to be burned at a higher-than-normal rate, because of the higher partial pressure of oxygen injected with the fuel mixture. Nitrous injection systems may be "dry", where the nitrous oxide is injected separately from fuel, or "wet" in which additional fuel is carried into the engine along with the nitrous. NOS may not be permitted for street or highway use, depending on local regulations. N2O use is permitted in certain classes of auto racing. Reliable operation of an engine with nitrous injection requires careful attention to the strength of engine components and to the accuracy of the mixing systems, otherwise destructive detonations or exceeding engineered component maximums may occur. Nitrous oxide systems were applied as early as World War II for certain aircraft engines.
Indirect injection in an internal combustion engine is fuel injection where fuel is not directly injected into the combustion chamber.
In automotive engineering, an inlet manifold or intake manifold is the part of an engine that supplies the fuel/air mixture to the cylinders. The word manifold comes from the Old English word manigfeald and refers to the multiplying of one (pipe) into many.
Lean-burn refers to the burning of fuel with an excess of air in an internal combustion engine. In lean-burn engines the air–fuel ratio may be as lean as 65:1. The air / fuel ratio needed to stoichiometrically combust gasoline, by contrast, is 14.64:1. The excess of air in a lean-burn engine emits far less hydrocarbons. High air–fuel ratios can also be used to reduce losses caused by other engine power management systems such as throttling losses.
Gasoline direct injection (GDI), also known as petrol direct injection (PDI), is a mixture formation system for internal combustion engines that run on gasoline (petrol), where fuel is injected into the combustion chamber. This is distinct from manifold injection systems, which inject fuel into the intake manifold.
Homogeneous Charge Compression Ignition (HCCI) is a form of internal combustion in which well-mixed fuel and oxidizer are compressed to the point of auto-ignition. As in other forms of combustion, this exothermic reaction produces heat that can be transformed into work in a heat engine.
The two-stroke power valve system is an improvement to a conventional two-stroke engine that gives a high power output over a wider RPM range.
The hot-bulb engine is a type of internal combustion engine in which fuel ignites by coming in contact with a red-hot metal surface inside a bulb, followed by the introduction of air (oxygen) compressed into the hot-bulb chamber by the rising piston. There is some ignition when the fuel is introduced, but it quickly uses up the available oxygen in the bulb. Vigorous ignition takes place only when sufficient oxygen is supplied to the hot-bulb chamber on the compression stroke of the engine.
Engine efficiency of thermal engines is the relationship between the total energy contained in the fuel, and the amount of energy used to perform useful work. There are two classifications of thermal engines-
Ricardo PLC is a British publicly listed company named after its founder, Sir Harry Ricardo, originally incorporated and registered as Engine Patents Ltd. in 1915. Ricardo is a global engineering, environmental and strategic consultancy, operating across a range of market sectors. Since 1919 the headquarters have been at Shoreham-by-Sea, West Sussex. Ricardo develops engines, transmissions, vehicle systems, intelligent transportation systems (ITS) and hybrid & electric systems in addition to providing environmental and strategic consultancy services.
A two-stroke diesel engine is a diesel engine that uses compression ignition in a two-stroke combustion cycle. It was invented by Hugo Güldner in 1899.
Internal combustion engines come in a wide variety of types, but have certain family resemblances, and thus share many common types of components.
The Peugeot JetForce is a scooter manufactured by Peugeot Motocycles from 2002 until early 2009. It was available in a 125 cc (7.6 cu in) four-stroke version and a 50 cc (3.1 cu in) two-stroke along with its several sub-types.
An internal combustion engine is a heat engine in which the combustion of a fuel occurs with an oxidizer in a combustion chamber that is an integral part of the working fluid flow circuit. In an internal combustion engine, the expansion of the high-temperature and high-pressure gases produced by combustion applies direct force to some component of the engine. The force is typically applied to pistons, turbine blades, a rotor, or a nozzle. This force moves the component over a distance, transforming chemical energy into kinetic energy which is used to propel, move or power whatever the engine is attached to.