Speed change controller for a vehicle automatic transmission
First Claim
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1. A speed change controller for a vehicle automatic transmission, and controller comprising;
- an automatic transmission provided on the output side of an internal combustion engine of the vehicle,a vehicle speed sensing means for sensing vehicle speed,a throttle valve opening sensing means for sensing the opening of a throttle valve in an air intake system of the engine,a driving conditions cognition means for cognition/judgment of vehicle driving conditions.a speed change range storage means for pre-storing, on the basis of vehicle driving conditions, speed change ranges contained in a plurality of speed change steps and classified into a number of partitions ranging from a first speed change range for traveling speeds of n or n+1, to a k+1 speed change range for traveling speeds of n+k or n+k+1,a speed change range selection means for selecting from said speed change range storage means, a single speed change range out of the speed change ranges from said first speed change range to said k+1 speed change range, on the basis of vehicle speed and throttle valve opening sensed by said vehicle speed sensing means and said throttle valve opening sensing means respectively,a speed change step selection means for selecting from said selected speed change range, a speed change position for either a low speed change step or a high speed change step, on the basis of vehicle driving conditions recognized by said driving conditions cognition means, anda shift change means for changing the shift step of said automatic transmission according to said selected speed change position.
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Abstract
A speed change controller for vehicle automatic transmission is constructed such that a speed change range is selected on the basis of vehicle speed and throttle valve opening, and a speed change position for either a low speed change step or a high speed change step is selected from the speed change range by recognizing/judging the vehicle driving conditions. As a result speed change timing can be appropriately controlled to suit to environmental changes, and speed change control catering equally to the individual needs of a large variety of drivers is possible.
12 Citations
5 Claims
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1. A speed change controller for a vehicle automatic transmission, and controller comprising;
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an automatic transmission provided on the output side of an internal combustion engine of the vehicle, a vehicle speed sensing means for sensing vehicle speed, a throttle valve opening sensing means for sensing the opening of a throttle valve in an air intake system of the engine, a driving conditions cognition means for cognition/judgment of vehicle driving conditions. a speed change range storage means for pre-storing, on the basis of vehicle driving conditions, speed change ranges contained in a plurality of speed change steps and classified into a number of partitions ranging from a first speed change range for traveling speeds of n or n+1, to a k+1 speed change range for traveling speeds of n+k or n+k+1, a speed change range selection means for selecting from said speed change range storage means, a single speed change range out of the speed change ranges from said first speed change range to said k+1 speed change range, on the basis of vehicle speed and throttle valve opening sensed by said vehicle speed sensing means and said throttle valve opening sensing means respectively, a speed change step selection means for selecting from said selected speed change range, a speed change position for either a low speed change step or a high speed change step, on the basis of vehicle driving conditions recognized by said driving conditions cognition means, and a shift change means for changing the shift step of said automatic transmission according to said selected speed change position. - View Dependent Claims (2, 3, 4, 5)
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Specification