초록 ▼

A tensioner for applying tension to a balancer drive chain is mounted in a balancer housing which accommodates balancer shafts. Oil is supplied from a reservoir chamber to the tensioner. An oil jet member for lubricating the balancer drive chain is mounted at a position downstream in an oil flow dir

A tensioner for applying tension to a balancer drive chain is mounted in a balancer housing which accommodates balancer shafts. Oil is supplied from a reservoir chamber to the tensioner. An oil jet member for lubricating the balancer drive chain is mounted at a position downstream in an oil flow direction from the reservoir chamber. Therefore, while enabling foreign matter contained in the oil to be discharged from the oil jet member without being accumulated within the tensioner, a predetermined pressure can be maintained in the reservoir chamber by a resistance to the flow of oil passing through the oil jet member. Also, a constriction is provided between the reservoir chamber and the oil jet member. Therefore, it is difficult for the oil to flow out of the reservoir chamber even after stoppage of an engine, thereby supplying the oil to the tensioner upon the next start of the engine without delay. Thus, it is possible to prevent the foreign matter from entering the tensioner for the balancer drive chain.

대표청구항 ▼

What is claimed is: 1. An engine comprising:a cylinder block;a crankshaft;a balancer housing mounted below the cylinder block;a balancer drive chain for transmitting a drive force between the crankshaft and a balancer shaft supported on the balancer housing;a hydraulic tensioner for providing tensio

What is claimed is: 1. An engine comprising:a cylinder block;a crankshaft;a balancer housing mounted below the cylinder block;a balancer drive chain for transmitting a drive force between the crankshaft and a balancer shaft supported on the balancer housing;a hydraulic tensioner for providing tension to the balancer drive chain;an oil pump mounted at one end of the balancer shaft for supplying oil to the hydraulic tensioner;an end housing member mounted to one end of the balancer housing and providing an oil passage extending from a discharge port of the oil pump to the hydraulic tensioner;a reservoir chamber formed in the end housing member so as to be provided in the oil passage for storing the oil supplied to the hydraulic tensioner;a rear chamber provided on a downstream side of the reservoir chamber and communicated with the reservoir chamber through a constriction;an oil jet member which injects the oil to a lubricated portion of the balancer drive chain and which is mounted on the end housing member and communicates with the rear chamber.