Engine timing apparatus and method of operating same
First Claim
1. An apparatus for determining the timing of an internal combustion engine having a crankshaft, a camshaft, and a plurality of cylinders each having an electronically controlled fuel injector, comprising:
- a crankshaft sensing means for monitoring the rotation of the engine crankshaft and responsively producing a crankshaft pulsetrain; and
an engine control means for receiving the crankshaft pulsetrain and responsively determining the period of each pulse, determining the rotational position of the crankshaft by determining which half of the engine cycle is represented by the crankshaft pulsetrain, and producing an inject signal relative to the crankshaft pulsetrain to the fuel injector in order to initiate fuel injection.
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Accused Products
Abstract
An apparatus for determining the timing of an internal combustion engine having a crankshaft, a camshaft, and a plurality of cylinders each having an electronically controlled fuel injector is disclosed. A crankshaft sensing device monitors the rotation of the engine crankshaft and responsively produces a crankshaft pulsetrain. Additionally, a camshaft sensing device monitors the rotation of the engine camshaft and responsively produces a camshaft pulsetrain. An engine control receives the crankshaft and camshaft pulsetrains, and responsively determines the period of each pulse, determines the rotational position of the crankshaft and camshaft, and produces an inject signal relative to one of the crankshaft and camshaft pulsetrains to the fuel injector in order to initiate fuel injection.
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Citations
11 Claims
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1. An apparatus for determining the timing of an internal combustion engine having a crankshaft, a camshaft, and a plurality of cylinders each having an electronically controlled fuel injector, comprising:
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a crankshaft sensing means for monitoring the rotation of the engine crankshaft and responsively producing a crankshaft pulsetrain; and an engine control means for receiving the crankshaft pulsetrain and responsively determining the period of each pulse, determining the rotational position of the crankshaft by determining which half of the engine cycle is represented by the crankshaft pulsetrain, and producing an inject signal relative to the crankshaft pulsetrain to the fuel injector in order to initiate fuel injection. - View Dependent Claims (2, 3, 4, 9, 10, 11)
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5. A method for determining the timing of an internal combustion engine having a crankshaft, a camshaft, and a plurality of cylinders each having an electronically controlled fuel injector, comprising the steps of:
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monitoring the rotation of the engine crankshaft and responsively producing a crankshaft pulsetrain; monitoring the rotation of the engine camshaft and responsively producing a camshaft pulsetrain; and receiving the crankshaft and camshaft pulsetrains, responsively determining the period of each pulse, determining the rotational position of the crankshaft and camshaft, determining whether the camshaft pulsetrain is indicative of reliable information and determining which half of the engine cycle is represented by the crankshaft pulsetrain and producing an inject signal relative to the crankshaft pulsetrain to the fuel injector in order to initiate fuel injection in response to the camshaft pulsetrain being unreliable. - View Dependent Claims (6, 7, 8)
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Specification