Shift control system for automatic transmission
AssigneeNissan Motor Co., Ltd.
InventorHiroshi Takahashi
Life of this patent
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Abstract
A shift control system for an automatic transmission of a vehicle includes a vehicle speed sensor, a throttle opening sensor, and a controller which determines a desired speed ratio in accordance with the vehicle speed and throttle opening by using a shift pattern, and controls the automatic transmission to achieve the desired speed ratio. There are further provided an input device which permits the driver to appraise the shifting performance, and to produce a complaint signal against each unsatisfying shift, and a modifying means for altering the shift pattern in accordance with the driver's complaint.
Claims16
A shift control system for an automatic transmission of a vehicle, comprising:
- actuator means for changing a speed ratio of said automatic transmission in response to a shift control signal,
- sensor means for sensing an operating condition of said vehicle, and producing a sensor signal,
- controller means, connected with said sensor means, for producing said shift control signal to control said automatic transmission in accordance with a single predetermined adaptable shift pattern,
- input means which permits a driver of said vehicle to evaluate a shift effected by said controller means, and to produce an evaluation signal, and
- modifying means for altering said single shift pattern in accordance with said evaluation signal.
A shift control system for an automatic transmission of a vehicle, comprising:
- actuator means for changing a speed ratio of said automatic transmission in response to a shift control signal,
- sensor means for sensing an operating condition of said vehicle, and producing a sensor signal,
- controller means, connected with said sensor means, for producing said shift control signal to control said automatic transmission in accordance with a predetermined adaptable shift pattern,
- input means which permits a driver of said vehicle to evaluate a shift effected by said controller means, and to produce an evaluation signal,
- modifying means for altering said shift pattern in accordance with said evaluation signal, and
- wherein said controller means comprises first storage means for storing a shift line of said shift pattern in the form of a linear equation including a first term equal to said vehicle speed multiplied by a first parameter and a second term equal to said throttle opening multiplied by a second parameter, and said modifying means changes a value of at least one of said first and second parameters in response to said evaluation signal.
A shift control system for an automatic transmission of a vehicle, comprising:
- actuator means for changing a speed ratio of said automatic transmission in response to a shift control signal,
- sensor means for sensing an operating condition of said vehicle, and producing a sensor signal,
- controller means, connected with said sensor means, for producing said shift control signal to control said automatic transmission in accordance with a predetermined adaptable shift pattern,
- input means which permits a driver of said vehicle to evaluate a shift effected by said controller means, and to produce an evaluation signal,
- modifying means for altering said shift pattern in accordance with said evaluation signal, and
- wherein said controlling means comprises first storage means for storing data defining a shift line of said shift pattern, and said modifying means includes means for changing the data which defines the shift line and which is stored in said first storage device.
Dependencies are inferred from the claim text.