The document describes a vehicle engine shut-off system that saves fuel and reduces emissions by automatically turning off the engine during brief stops and restarting it when ready to move. It incorporates various sensors to monitor engine and external temperatures, as well as the positions of critical components like pedals and gear shifts. These sensors help maintain optimal engine performance and ensure safety by checking connections like seat belts.

1. Deivanayagam H,
Mechanical Engineer,
Tirunelveli.

2. Brief working of the system
 Turns off the engine when the vehicle stops for a
short interval of time especially in traffic
congestion or in traffic signals
 Engine get restarted automatically when the
vehicle is ready to move.

3. Achievable Improvements
 Increased fuel economy
 Decreased emissions

5. Sensors
Engine Temperature
External Temperature
Cabin Temperature
Battery status
Steering angle
Seat belt connection
Brake pedal position
Accelerator pedal position

6. Sensors
Clutch pedal position (non-hybrid)
Gear shift (non-hybrid)
Wheel speed

7. Temperature sensors
 To record the temperature in various parts with the
assistance of respective temperature sensors
 Will help engine to avoid cold start by maintaining
Engine in the apropos temperature range

8. Position sensors
 To find the positions of key parts of the vehicle
 Brake pedal and acceleration pedal positions helps
the system to ensure that the engine is at rest or in
motion.
 Clutch pedal position and gear shift to find
whether the car is in gear or neutral

9. Other sensors
 Wheel speed sensor to measure the speed and to
send appropriate signal to the system
 Battery status sensor to signal the system about
the back up in the battery which is mandatory to
restart the engine comfortably
 Seat belt connection sensor is to ensure safety