Patent ID: 9726124
Date: 2017-08-08
CPC Classifications: F02M

Claim:
1. A structure of an intake manifold constituted of a plurality of divided pieces for an engine, comprising: a gas supply hole formed in a predetermined position of an outer surface of the intake manifold, and configured to supply predetermined gas from an outside of the intake manifold; a gas inlet passage formed in predetermined joint surfaces of the divided pieces, and configured to guide the gas supplied through the gas supply hole to a predetermined gas inlet position of an intake passage; a purge valve mounted on the intake manifold, and configured to regulate an amount of fuel vapor to be introduced to the intake passage, wherein the gas supply hole is a purge gas supply hole which supplies purge gas of fuel vapor to be discharged from the purge valve, the gas inlet passage is a purge passage which guides the purge gas supplied through the purge gas supply hole to a downstream portion of the intake passage with respect to a throttle valve, the purge valve is mounted on a joint portion recessed between runners of the intake manifold adjacent to each other, the intake manifold includes a throttle body provided with the throttle valve, a single pipe portion formed downstream of the throttle body, an engine mounting portion, and a connecting portion which connects between the single pipe portion and the engine mounting portion, the purge gas supply hole is formed in the engine mounting portion, the purge passage is formed in the joint surfaces of the divided pieces constituting the connecting portion, the intake manifold further includes a surge tank formed downstream of the single pipe portion, and a second connecting portion which connects between the surge tank and the engine mounting portion, and the intake manifold further includes a communication path formed in the joint surfaces of the divided pieces constituting the second connecting portion, and configured to communicate between the surge tank and the outside of the intake manifold.