Engineer World

  CYCLE TIME -                Cycle time is the total time from the beginning to the end of your process or actual time required for a worker to complete one cycle of his process or cycle time is the time from when the operation begins to the point of time at which the operation ends. LEAD TIME -  "Lead time clock start when the request is made and ends at delivery." Example - A customer Request their production on November 6, the company receives the order instantly and delivers the product  on November  10.He actually starts working on the product only from the 8.Therefore , the lead time here is 4 days while cycle time is 2 days. Note- Lead time can never be less than cycle time for optimal operation at best lead time = Cycle time Takt time - Takt is German word which means pulse take time is the rate at which a finished product needs to be completed in order to meet customer demand.  Takt time is the maximum...

 What is the objective? To achieve zero inventory in APTICS dictionary. JIT is defined as," A philosophy of manufacturing based on elimination of all waste and continuous improvement of productivity." APICS-         " American production of inventory control and society" JIT is also defined as an approach with objective of producing a right part in right time  at right place. JIT was developed by TOYOTA in 1950.(1950-1970). 1980 - GEC ( General electric company ) Country -USA OTHER NAMES OF JIT- Toyota production system Lean production Stockless production Elements of JIT- Stabilize and level the MPS with uniform plant loading (Heijunka). Reduce set up time(Ex- Nascar pit screw) Reduce lot size Preventive maintenance  Reduce lead time Flexible workplace-Respect for people Require supplier quality assurance and implement a zero defect quality program (JIDOKA) QAT - Quality at Source M.P.S. - Master Production System Advantage of JIT-  Le...

Fuel-Injection System is vital to the working and performance of CI engine  This system serves the purpose of initiating and controlling the combustion to meet the demand requirements  Fuel is injected into combustion chamber towards the end of compression.  It is atomized as it enters under high velocity and the droplets get vaporized to form a fuel-air mixture. Functional Requirements of an Injection System:  The following requirements must be met by the Fuel Injection (FI) System:  Accurate metering of fuel injected per cycle to meet changing demand of speed & load. Precise timing of fuel injection in the cycle to ensure performance; power, fuel economy, emissions. Proper control of rate of injection to achieve desired heat release during combustion without knocking.  Proper atomization of fuel into fine droplets  Proper spray pattern to ensure rapid mixing of fuel & air  Uniform distribution of fuel droplets throughout t...

          Clutch is a mechanical device that facilitates transmission of power and motion from one component (the driving member) to another (the driven member) when engaged, with a provision for disengagement whenever required. Function of Clutch: It can be disengaged. This allows engine cranking and permits the engine to run without delivering power to the transmission.  While disengaging, it permits the driver to shift the transmission into various gear according to operating condition.  While engaging, the clutch slips momentarily. this provides smooth engagement and lessens the shock on gears, shaft and other parts of automobile.  While engaging, the clutch transmits the power to the wheel without slipping, in ideal condition. Main Parts of Clutch: These are known as the principle parts of the clutch. • Driving Member  • Driven Member  • Operating Member Driving Member: Driving member has a flywheel which is mounted on...