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Certain multi-point injection systems also use tubes with poppet valves fed by a central injector instead of individual injectors. Typically though, a multi-point injected engine has one fuel injector per cylinder, an electric fuel pump, a fuel distributor, an airflow sensor, [5] and, in modern engines, an engine control unit. [6]
In a manifold injection system, air and fuel are mixed outside the combustion chamber so that a mixture of air and fuel is sucked into the engine. The main types of manifold injections systems are multi-point injection and single-point injection. These systems use either a continuous injection or an intermittent injection design. [16]
Cylinder block material: Cast iron 1971-1978 Alusil 1978-1991: Cylinder head material: Aluminum: Valvetrain: SOHC with 2 valves x cyl. Combustion; Fuel system: Continuous multi-point injection: Management: Bosch K(E)-Jetronic: Fuel type: Gasoline: Oil system: Wet sump: Cooling system: Water-cooled: Output; Power output: 185–300 PS (136–221 ...
With a 9.5:1 compression ratio and DOHC, four-valve-per-cylinder head and multi-point EFI, this engine produces 115 PS (85 kW; 113 hp) at 6,000 rpm and 135 N⋅m (100 lb⋅ft) at 5,000 rpm. [1] The 4G91 was a short-lived model, mainly built between 1991 and 1995 and rarely seen in export markets.
An illustration of several key components in a typical four-stroke engine. For a four-stroke engine, key parts of the engine include the crankshaft (purple), connecting rod (orange), one or more camshafts (red and blue), and valves. For a two-stroke engine, there may simply be an exhaust outlet and fuel inlet instead of a valve system.
The SE engines are equipped with a Bosch-made multi-point injection system operating on an intermittent group injection scheme with two pistons controlling a group of three cylinders each. The injection pump is mechanically driven, and mechanically controlled. The injection pressure is 15 atü (ca. 1570 kPa).