Intake system of multicylinder internal combustion engine

Details Intake system of multicylinder internal combustion engine Intake system of multicylinder internal combustion engine

1989-10-17

1990-07-03

Okonsky, David A.

Internal-combustion engines

Multiple cylinder

F02M 3500

Patent

active

049381776

ABSTRACT:
The intack system of multicylinder internal combustion engine with two rows of cylinders, constructed in accordance with the invention, includes a throttle valve unit provided on the side of either row of the engine cylinders and two intake air passages of different length leading to the two cylinder rows, one passage for the first cylinder row having a first resonance portion and the other passage for the second cylinder row having a second resonance portion nearly equal in length to said first resonance portion and a pressure wave inversion portion extending from said second resonance portion at least to the upstream-side end where said two passages separate from each other and having a cross-sectional area that allows inversion of intake pressure waves. The present invetnion accordingly makes the effects of resonance supercharging in the two resonance portions nearly equal, and the volumetric efficiency shows only one peak in low engine speed corresponding to the occurrence of resonance supercharging. Therefore, the deviation of intake air distribution is minimized and the variations of generating torque from the cylinders are reduced, so as to ensue smaller engine vibrations and a better feeling of vehicle operation.

REFERENCES:
patent: 3796048 (1974-03-01), Annus et al.
patent: 4064696 (1977-12-01), Cser
patent: 4300488 (1981-11-01), Cser

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