99 ENGINE2.2LDICOR Vaccum management system consists of following components : Vaccum pump Vaccumaccumulator Electronics vaccum regulating valve (EVRV) Vaccum tank Non-return valve (NRV) Vaccumaccumulator (Fig.208) The vaccum is generated by the camshaft driven vaccum pump. The vaccum cicuit for the brake and Engine is separated by the in-line Non return valve (NRV) In between NRV and Vaccumaccumulator, there is a T connector which further connectsEVRVVNTandEVRV EGR. The NRV are vaccum accumulator helps in vehicle performance viz acceleration through gears after repeated brake stops. With this system there is no vaccum starvation by VNT andEGR irrespetive of braking application. TheVaccum accumulator is mounted on fire wall with the help of a bracket. (Fig.209) Vaccumpump (Fig.210) vaccumpump supplies vaccum to Brake booster, VNT and EGR systems. This unit is driven by the exhaust camshaft. For removal and fitment procedure please refer engine over haul section of thismanual. VaccumTank For details please refer brakes section of this manual. EVRV For details please refer EGR section of this manual. NRV (Fig. 211) This is provided to safeguard the vaccummanagement system. while assembling NRV the arrowmark should point towards vaccum pump. Fig. 208 Fig. 209 Fig. 210 Fig. 211
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