Nissan Motor Company Limited

Masato Hatakenaka

Hiroshi Iida

Masanori Harada

Kosuke Ito

First and second cam covers define at least parts of first and second cam chambers respectively. Blow-by gas produced in an internal combustion engine is conducted to the first and second cam chambers. A communication passage connects the first and second cam chambers. A gas passage connects the communication passage and an air intake passage of the engine. A device disposed essentially at the connection between the communication passage and the gas passage serves to keep oil out of blow-by gas being drawn back into the air intake system of the engine.

Crankcase emission control system for an internal combustion engine

An exhaust gas purification control apparatus for an internal combustion engine wherein vacuum signals applied to air fuel mixture control, exhaust gas recirculation control, and ignition timing control are modified by a vacuum signal modifier. The vacuum signal modifier is operative in response to a pressure signal applied thereto. This pressure signal is produced by a pressure signal control device by diluting a venturi vacuum with air.

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Yokohama, Japan

Masato Hatakenaka