We used to have to start car engines by key and listen for when the engine would “catch”. How does it know now automatically?

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This is probably already revealing how old some of us are, but we remember that we had to start our cars by turning the key and waiting to hear the engine “catch”. At that point you knew the engine was ok to proceed, and if you stopped turning the key it wouldn’t die.

How does the starter today (push button) know all this, and it never seems to get it wrong? I have never heard a push button starter fail to get it right unless some other issue like dead battery, etc. (and btw, today’s engines seem to have so far fewer issues like we used to have)

In: Engineering

23 Answers

Anonymous 0 Comments

Part of this is fuel pressure. This is controlled more exactly now. Ten or fifteen years ago the car would not pressurize the fuel system right away. It would take a second or so to build up. Fuel pressure close to instantaneous now so less time is needed to crack the now brushless starter.

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