On-board fuel vapor recovery system having improved canister pur

Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system

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123458, 25112915, 25112905, F02M 3302

Patent

active

052379809

ABSTRACT:
An irregularity that might otherwise be present in the flow characteristic of the system is cured by damping the motion of the armature of the CPS valve in two ways. One way comprises incorporating a "step" into the confronting faces of the armature and stator at their interface across the air gap. The other way comprises guiding the armature motion by means of a brass tube with sufficiently small running clearance such that pneumatic damping occurs.

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