An engine and an air cylinder determination method used for performing air cylinder determination in the engine
An engine and cylinder technology, applied in the field of cylinder judgment, can solve problems such as reduced reliability of cylinder judgment, misjudgment, unstable engine speed, etc., and achieve the effect of high reliability, fast judgment of cylinder, and guaranteed reliability
Inactive Publication Date: 2016-10-19
HITACHI AUTOMOTIVE SYST SUZHOU
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Problems solved by technology
However, due to the instability of the engine speed, the intake air is prone to produce large errors when starting, and therefore, misjudgments are likely to occur, which reduces the reliability of the cylinder judgment.
Method used
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Embodiment Construction
[0024] Below, refer to figure 1 and figure 2 , briefly explain the structure and working principle of the engine 100 according to the embodiment of the present invention.
[0025] Such as figure 1 As shown, the engine 10 according to the embodiment of the present invention includes an intake pipe 100 , a cylinder portion 200 and an exhaust pipe 300 .
[0026] A cam phase sensor CAMS, a crankshaft position sensor CAS and a valve position sensor AVS are arranged in the cylinder portion 200 of the engine 10, wherein the above-mentioned cam phase sensor CAMS is set near the cam of the engine 10 for detecting the phase of the cam. The crankshaft position sensor CAS is arranged near the crankshaft of the engine 10, and is used to detect whether the crankshaft is located on a normal tooth or a missing tooth. Valve position (opening and closing) is detected.
[0027] Below, combine figure 2 The signals of each sensor in the engine (cam phase sensor CAMS, valve position sensor A...
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The invention provides an engine and an air cylinder determination method used for performing air cylinder determination in the engine. The engine comprises a cam phase sensor and a crankshaft position sensor. The air cylinder determination of the engine can be completed through the combination of the cam phase sensor and the crankshaft position sensor. The engine also comprises a valve position sensor used for detecting the opening and closing of an intake valve and an exhaust valve. When the cam phase sensor fails, the air cylinder determination of the engine can be completed through the valve position sensor and the crankshaft position sensor. When the valve position sensor detects a rising edge of an opening signal of the exhaust valve and immediately then the crankshaft position sensor detects any missing tooth in missing teeth, the exhaust top dead center of a 1# cylinder is determined. When the valve position sensor detects a falling edge of an opening signal of the intake valve and immediately then the crankshaft position sensor detects any missing tooth in the missing teeth, the compression top dead center of the 1# cylinder is determined.
Description
technical field [0001] The present invention relates to an engine and a cylinder determination method therein, and more particularly, to an engine and a cylinder determination method capable of performing engine cylinder determination even when a cam phase sensor is in failure. Background technique [0002] Generally, every engine has a crankshaft position sensor and a cam phase sensor. The prior art utilizes the combination of the crankshaft position sensor and the cam phase sensor to complete the determination of the cylinder position of the engine. That is to say, in the prior art, in order to normally complete the determination of the cylinder position of the engine, both the crankshaft position sensor and the cam phase sensor are indispensable. [0003] However, in the actual use of the vehicle, the cam phase sensor is ineffective due to some faults, but the crankshaft position sensor is still in normal operation. At this time, the engine cannot complete the cylinder d...
Claims
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Inventor 裴建龙
Owner HITACHI AUTOMOTIVE SYST SUZHOU