EGR apparatus for an internal combustion engine

Details EGR apparatus for an internal combustion engine EGR apparatus for an internal combustion engine

1993-04-06

1994-01-18

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Crankcase vapor used with combustible mixture

F02M 2507

Patent

active

052792730

ABSTRACT:
An EGR apparatus includes an EGR conduit, an EGR valve, a first passage connecting a portion of an intake conduit downstream of a throttle valve and the EGR valve, and a second passage connecting a portion of the intake conduit upstream of the throttle valve and a medium portion of the first passage. A two-way solenoid valve is installed in the first passage between the intake conduit and a connecting portion where the first passage and the second passage join. Further, a fixed throttle is disposed in the second passage. By removing a VCV of a conventional EGR apparatus from the EGR apparatus and by replacing a three-way VSV of the conventional apparatus with a combination of the two-way solenoid valve and the fixed throttle, a problem of non-cutting of EGR, which can occur in the conventional apparatus, does not occur in the EGR apparatus of the invention.

REFERENCES:
patent: 4233947 (1980-11-01), Abo
patent: 4281631 (1981-08-01), Yamaguchi
patent: 4378776 (1983-04-01), Nishimori
patent: 4432330 (1984-02-01), Otsuka
patent: 4454853 (1984-06-01), Hasegawa
patent: 4467775 (1984-08-01), Buck et al.
patent: 4665882 (1987-05-01), Otobe
patent: 4736728 (1988-04-01), Takahashi et al.
patent: 5113835 (1992-05-01), Seki et al.

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