Patent ID: 7757660
Filing Date: 2010-07-20
Classification: F02D,Y02T

Abstract:
1. An intake device for an internal combustion engine comprising: (a) a duct forming an intake passage for supplying an intake air into a combustion chamber of the internal combustion engine; (b) a first valve main body rotatably provided in the intake passage such that the first valve main body can rotate relative to the duct; (c) a second valve main body rotatably provided in the intake passage such that the second valve main body can rotate relative to the duct and moves in conjunction with the first valve main body; (d) a first throttle portion formed between the duct and the first valve main body; and (e) a second throttle portion formed between the duct and the second valve main body or formed in the second valve main body, wherein the second valve main body is located downstream of the first valve main body with respect to a flow direction of the intake air when the intake device fully closes the intake passage or when rotation speed or a load of the internal combustion engine is equal to or less than a threshold value, the second valve main body has a plate length shorter than a plate length of the first valve main body, and an opening area of the second throttle portion is set larger than an opening area of the first throttle portion when the rotation speed or the load of the internal combustion engine is equal to or less than the threshold value.