Throttle valve opening detecting apparatus for a vehicle engine
First Claim
1. A throttle valve opening detecting apparatus for a vehicle engine connected with an automatic transmission comprising:
- a throttle valve disposed in an intake manifold of a vehicle engine for controlling the amount of intake air reaching cylinders of said vehicle engine;
throttle valve opening sensor for providing an output proportional to an opening of said throttle valve;
reference output setting means for setting therein an output as a reference output representative of a closed position of said valve;
control means for receiving said output from said throttle valve opening sensor to decreasingly renew said reference output in said reference output setting means when the smallest output from said throttle valve opening sensor is smaller than said reference output or increasingly renew said reference output in said reference output setting means when said output from said throttle valve opening sensor is continuously larger than said reference output for a predetermined period of time while it is smaller than a predetermined output; and
operating means for obtaining a ratio of opening of said throttle valve to be controlled based on a current output from said throttle valve opening sensor and said renewed reference output to provide a control signal representative of said opening ratio.
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Accused Products
Abstract
A throttle valve opening detecting apparatus of an automatic transmission for detecting an angular position or opening of a throttle valve for controlling the amount of air-fuel mixture reaching cylinders of a vehicle engine that includes a throttle valve position sensor for providing an output proportional to an angular position or opening of the throttle valve. A memory device memorizes a minimum value of the output to set a reference output for a closed position of the throttle valve. A renewing device decreasingly renews the reference output when the throttle valve position sensor provides an output smaller than the reference output set in the reference output. The renewing device increasingly renews the reference output when the throttle valve position sensor provides an output larger than the reference output and smaller than a preset reference output for a predetermined or preselected period of time.
38 Citations
19 Claims
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1. A throttle valve opening detecting apparatus for a vehicle engine connected with an automatic transmission comprising:
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a throttle valve disposed in an intake manifold of a vehicle engine for controlling the amount of intake air reaching cylinders of said vehicle engine; throttle valve opening sensor for providing an output proportional to an opening of said throttle valve; reference output setting means for setting therein an output as a reference output representative of a closed position of said valve; control means for receiving said output from said throttle valve opening sensor to decreasingly renew said reference output in said reference output setting means when the smallest output from said throttle valve opening sensor is smaller than said reference output or increasingly renew said reference output in said reference output setting means when said output from said throttle valve opening sensor is continuously larger than said reference output for a predetermined period of time while it is smaller than a predetermined output; and operating means for obtaining a ratio of opening of said throttle valve to be controlled based on a current output from said throttle valve opening sensor and said renewed reference output to provide a control signal representative of said opening ratio. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A throttle valve opening detecting apparatus for a vehicle engine connected with an automatic transmission comprising:
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a throttle valve disposed in an intake manifold of a vehicle engine for controlling the amount of intake air reaching cylinders of said vehicle engine; throttle valve opening sensor for providing an output proportional to an opening of said throttle valve; reference output setting means for setting therein an output as a reference output representative of a closed position of said valve; control means for receiving said output from said throttle valve opening sensor to decreasingly renew said reference output in said reference output setting means when the smallest output from said throttle valve opening sensor is smaller than said reference output or increasingly renew said reference output in said reference output setting means when said output from said throttle valve opening sensor is continuously larger than said reference output for a predetermined period of time while it is smaller than a predetermined output; and means for judging whether said throttle valve is in an idle position by comparing said output from said throttle valve opening sensor with said reference output set in reference output setting means. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification