Camshaft and crankshaft sensors

Camshaft and crankshaft sensors keep ignition timing, engine speed and cylinder firing times synchronized, allowing the engine to run smoothly.

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How to install

How camshaft and crankshaft sensors work

Types and characteristics

Installation and fault finding

Catalogues and marketing materials

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Camshaft and crankshaft sensors

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How camshaft and crankshaft sensors work

These two types of sensor help the electrical control unit (ECU) calculate the position of two key parts of the engine: the camshaft and the crankshaft.

The crankshaft position sensor is attached to the engine block facing the timing rotor on the crankshaft. It counts the number of teeth on the crankshaft that have passed the sensor, sending this value to the ECU which can then work out where the crankshaft is on its 360-degree rotation. The rate of positional change is used to calculate the engine’s rotational speed.

The camshaft position sensor is mounted near the cylinder head, opposite the timing rotor attached to the engine camshaft. It monitors the changing magnetic resistance from the moving magnetic field of the timing rotor; this information is used by the ECU to calculate the camshaft angle and to recognize which cylinder is firing.

Together, these components ensure the engine parts remain ‘in time’ and the engine operates smoothly and efficiently. With both Magnetic Resistant Element (MRE) type and Magnetic Pick-Up (MPU) type sensors available, DENSO offers a comprehensive range of OE-quality sensors to the aftermarket.

Features and benefits

Variety of sizes and designs available, across inductive and semiconductor types.
Excellent reliability, with simple and problem-free connections and high temperature resistance.
Guaranteed first-time fit and superior performance.
The DENSO name is associated with high quality and low return rates.

Multiple use cases covered
With a wide range of MPU and MRE-type sensors available, there are DENSO sensors available to fit every need, from high precision to high temperature resistance.
Smaller and easier
Sensors are built to be compact, integrating multiple parts on one chip. They also offer seamless packaging and solder-free connections for ease of installation.
Built to last
A thin but strong body with a smaller air gap means DENSO sensors retain excellent durability. They are designed to minimise faults and returns.

Types and characteristics

DENSO offers two main types of sensor, across both crankshaft sensor and camshaft sensor functions.

Camshaft and crankshaft sensors types

MPU sensor (inductive type)

Widely used, highly precise sensor. Primarily consists of a body, collar, magnet, and coil. O-rings and collar swaging protect the coil from contamination.
Many variations are available to meet different engine specifications and rotor sizes. Direct connection type and lead wire type in range.

MRE sensor (semiconductor type)

A compact sensor that combines the detection element and processing circuit on one chip. Magneto-resistive element powers high signal-to-noise ratio, enabling excellent detection accuracy. In turn, this enables a greater degree of fuel efficiency and lower emissions.

Characteristics

Installation and fault finding

Correct installation, maintenance and monitoring of DENSO camshaft and crankshaft sensors will keep them operating to their fullest potential, powering efficient engine performance.

Installation

Make sure you install camshaft and crankshaft sensors safely, consulting OEM guidelines or diagnostic tools where appropriate.

Fault finding

Regular maintenance and replacement where necessary is essential to keeping camshaft and crankshaft sensors functioning optimally.

Catalogues and marketing materials

To find out more about Camshaft and crankshaft sensors browse the Downloads Area section. Click here.