I WAS DRIVING IN TRAFFIC WHEN THE CAR IN FRONT OF ME STOPPED ABRUPTLY IN FRONT OF ME. I READ ENDED HIM GOING ABOUT 40 MILES PER HOUR. MY AIR BAGS DID NOT INFLATE. I EXITED THE CAR AND BEGAN SPEAKING WITH THE OTHER DRIVER WHEN WE HEARD A POP IN MY CAR. SMOKE STARTING COMING OUT OF THE ENGINE COMPARTMENT AND THEN ALMOST IMMEDIATELY MY CAR ENGINE CAUGHT ON FIRE. THE CAR WAS NOT RUNNING. I INJURED MY KNEE AND SHOULDER IN THE INCIDENT.