Patent ID: 7534181
Filing Date: 2009-05-19
Classification: F01L,F16H

Abstract:
1. A chain drive for driving two adjacent parallel camshafts of a motor vehicle engine, comprising a first chain wheel, a second chain wheel, and a drive chain, the drive chain including a duplex chain having a first track and a second track, and wherein the first chain wheel has a first gear rim and the second chain wheel has a second gear rim, the first and second gear rims are arranged laterally offset to each other in the axial direction, the first gear rim of the first chain wheel is associated with the first track of the duplex chain and the second gear rim of the second chain wheel is associated with the second track of the duplex chain, and tip diameters of the offset first and second gear rims of the first and second chain wheels are overlapping, wherein a first support wheel is positioned laterally next to the first gear rim of the first chain wheel and a second support wheel is positioned laterally next to the second gear rim of the second chain wheel, the first support wheel engages into the second track of the duplex chain and the second support wheel engages into the first track of the duplex chain, the first support wheel of the first chain wheel is positioned in line with the second gear rim of the second chain wheel and the second support wheel of the second chain wheel is positioned in line with the first gear rim of the first chain wheel, wherein the first and second support wheels are driven together with the associated first chain wheel or second chain wheel respectively.