Device for determining load in an internal combustion engine
First Claim
1. Device for determining load in internal combustion engines, said device comprising a pressure sensor connected with a combustion chamber of an internal combustion engine, said pressure sensor having means for producing an output signal depending on a combustion chamber pressure of said combustion chamber, a crankshaft angle sensor for detection of a crankshaft angle of the internal combustion engine and processor means for determining a load of said internal combustion engine, wherein said processor means include means for determining said load from a pressure difference between two of said combustion chamber pressures, said two combustion chamber pressures forming said pressure difference being measured at two different predetermined ones of said crankshaft angle (x1, x2).
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Accused Products
Abstract
The device for determining load in internal combustion engines includes a pressure sensor connected with a combustion chamber of an internal combustion engine which produces an output signal depending on a combustion chamber pressure, a crankshaft angle sensor for detection of a crankshaft angle of the internal combustion engine and a processor for determining a load of the engine from relative values of the output signal of the pressure sensor at predetermined crankshaft angles. The processor includes a device for determining the load from a pressure difference between combustion chamber pressures measured at two different predetermined crankshaft angles (x1, x2) or from two integrated pressure values. The integrated relative pressure values are obtained by integration of a pressure-proportional output signal of the pressure sensor between two different predetermined crankshaft angles.
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Citations
15 Claims
- 1. Device for determining load in internal combustion engines, said device comprising a pressure sensor connected with a combustion chamber of an internal combustion engine, said pressure sensor having means for producing an output signal depending on a combustion chamber pressure of said combustion chamber, a crankshaft angle sensor for detection of a crankshaft angle of the internal combustion engine and processor means for determining a load of said internal combustion engine, wherein said processor means include means for determining said load from a pressure difference between two of said combustion chamber pressures, said two combustion chamber pressures forming said pressure difference being measured at two different predetermined ones of said crankshaft angle (x1, x2).
- 2. Device for determining load in internal combustion engines, said device comprising a pressure sensor connected with a combustion chamber of an internal combustion engine, said pressure sensor having means for producing an output signal depending on a combustion chamber pressure of said combustion chamber, a crankshaft angle sensor for detection of a crankshaft angle of the internal combustion engine and processor means for determining a load of said internal combustion engine, wherein said processor means includes means for determining said load from a difference between two pressure integral values, each of said pressure integral values being obtained by integration of said output signal of said pressure sensor between two different predetermined ones of said crankshaft angles.
Specification