초록 ▼

An internal combustion engine is disclosed which includes a plurality of cylinders split into first and second groups and operates in a split cylinder mode under low engine load conditions where the second group of cylinders are held inoperative and have their intake and exhaust ports connected to e

An internal combustion engine is disclosed which includes a plurality of cylinders split into first and second groups and operates in a split cylinder mode under low engine load conditions where the second group of cylinders are held inoperative and have their intake and exhaust ports connected to each other. Means is provided for preventing exhaust gases discharged from the second group of cylinders from mixing with exhaust gases discharged from the first group of cylinders during the split cylinder mode of operation.

대표청구항 ▼

An internal combustion engine comprising: (a) a plurality of cylinders split into first and second groups; (b) an intake passage provided therein with a throttle valve and being divided downstream of said throttle valve into first and second branches, said first branch communicating with said first

An internal combustion engine comprising: (a) a plurality of cylinders split into first and second groups; (b) an intake passage provided therein with a throttle valve and being divided downstream of said throttle valve into first and second branches, said first branch communicating with said first group of cylinders, and said second branch communicating with said second group of cylinders; (c) an exhaust passage having its upstream portion divided into first and second branches, said first branch communicating with said first group of cylinders, and said second branch communicating with said second group of cylinders; (d) an EGR passage having its one end opening into said second branch of said exhaust passage and the other end opening into said second branch of said intake passage; (e) control means for providing a first signal under high engine load conditions and a second signal under low engine load conditions; (f) first valve means provided in said second branch of said exhaust passage downstream of the opening of said EGR passage, said first valve means being responsive to the first signal for opening said second branch of said exhaust passage and being responsive to the second signal for closing the same; (g) second valve means provided in said second branch of said intake passage, said second valve means being responsive to the first signal for opening said second branch of said intake passage and being responsive to the second signal therefrom for closing the same; and (h) third valve means provided in said EGR passage, said third valve means being responsive to the first signal for closing said EGR passage and being responsive to the second signal for opening the same.