초록 ▼

A multi-cylinder internal combustion engine is provided with an intake port injection system capable of effectively delivering port injected quantities of fuel to each cylinder while minimizing the number and size of the fuel injectors. The intake port injection system of the present invention inclu

A multi-cylinder internal combustion engine is provided with an intake port injection system capable of effectively delivering port injected quantities of fuel to each cylinder while minimizing the number and size of the fuel injectors. The intake port injection system of the present invention includes a siamese or shared port arrangement having a plurality of common intake inlets, each delivering air from an intake manifold to one intake port of one cylinder and an intake port of a different cylinder. Two single intake inlets are also provided for delivering intake air solely to a single respective cylinder. Importantly, in a multi-cylinder engine having a total number of cylinders equal to N, the number of intake inlets, both common and single, equals N+1. Importantly, the total number of injectors also equals N+1. Although each intake inlet is served by only one injector, two injectors operate simultaneously to deliver fuel to a single cylinder via respective intake inlets. As a result, each injector only delivers half the total fuel quantity for a given injection and intake event resulting in smaller sized injectors and ultimately a reduction in packaging concerns and costs.

대표청구항 ▼

[ We claim:] [1.] A multi-cylinder internal combustion engine, comprising:a plurality of cylinders for receiving intake air and fuel, the total number of said plurality of cylinders equaling N number of cylinders, said total number of cylinders N including at least four cylinders;a respective pair o

[ We claim:] [1.] A multi-cylinder internal combustion engine, comprising:a plurality of cylinders for receiving intake air and fuel, the total number of said plurality of cylinders equaling N number of cylinders, said total number of cylinders N including at least four cylinders;a respective pair of intake ports associated with each of said plurality of cylinders for directing intake air into the respective cylinder;an intake manifold;a plurality of intake inlets for delivering intake air from said intake manifold to said intake ports, said plurality of intake inlets including one or more common intake inlets equal in number to N-1 and a plurality of single intake inlets, each of said one or more common intake inlets connected to both a first intake port associated with one of said plurality of cylinders and a second intake port associated a different one of said plurality of cylinders; anda plurality of injectors for injecting fuel into said plurality of intake inlets, the total number of said plurality of injectors equaling N+1, each of said plurality of intake inlets receiving fuel from only one of said plurality of injectors.