Knock sensor how does it work

Characteristic curve. Please contact us. Contact form Bosch Mobility Solutions. Start enquiry. LinkedIn channel Follow us for regular updates. YouTube channel More than mobility videos. Further interesting topics. High-pressure sensor for gasoline and CNG systems The high-pressure sensor measures the fuel pressure in the high-pressure fuel rail of engines with gasoline direct injection GDI.

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You and your skills take centre stage for HELLA — this is why we will get you ready for a high-tech future with our training program. Our range of diagnostics and service units offers you the entire spectrum of professional equipment.

Page for page. To ensure that you are also well informed, you will find everything from the catalog to the comparison list here. Skillfully draw attention to yourself - With our concepts and ideas for marketing, you can showcase yourself as a professional HELLA partner. Functional principle. Cause of failure. Knock sensor. Frequent fault symptoms are: Engine warning light comes on Error code is stored Reduced engine power Increased fuel consumption. Failure can be caused by different reasons: Internal short circuits Breaks in wiring Wiring short circuit Mechanical damage Incorrect mounting Corrosion.

Check the knock sensor: Example OK. Its indication assists the engine control to stop knocking ignition and thus guard the motor or engine control.

The arrangement of this sensor can be done outside of the engine block in the automobile. The main function of this is to record knocking noise within all engine operating conditions to stop engine injure. The knocking signal can be allocated to a particular cylinder in the car. If knocking occurs, the explosion signal for the particular cylinder can be changed within the late direction until knocking ignition no longer takes place.

A faulty sensor can visible itself in different ways during fault discovery through the control unit which includes the following,.

There are some common to rare symptoms of bad knock sensor that any driver need to know to ensure the ride to be smooth and effective. First thing, trust your gut, trust your inner self when you are driving at speed or carrying a light or heavy load in the car. There will be something that has gone wrong. Your car is not operating as it should be or at least you feel that it should be. By listening to the engine sound, by watching the speed change, by comparing the weight of your gas foot with the last time or just steering speed.

When it comes to feeling, only your skills, experience and familiarity with your cars can tell. Losing fuel mileague is what you will notice, especially at time of acceleration on highways. In the other ways, with the same distance you are used to travel, the fuel mileague goes down from F to E faster than it is supposed to. And to you this is the pain in the pocket, and you can see that more money on fuel this week but no change to overall travel distance.

You feel this clearly, and painfully. A malfunction indicator lamp MIL , or check engine light, is a tell-tale that a computerized engine-management system uses to indicate a malfunction. Found on the instrument panel of most automobiles, it usually bears the legend check engine , service engine soon , or a pictogram of an engine — and when illuminated it is typically either an amber or red color.

In this case, the computer can detect different sounds in the engine, and when there is no usual signal from the Knock Sensor, the computer will get the information and will assume there may be problem with the knock sensor. Then the Check Engine Light will turn on. When the knock sensor is not working properly and the computer realizes that, the vehicle will lose engine power. The most damaged engine should normally be the high-compression and flex-fuel ones. The result would be slowing the timing and keeping transmission out of drive.

Replacement of the knock sensor will fix this.