Method of controlling engine in vehicle for speed stage shifting of transmission
First Claim
1. A method of controlling an internal combustion engine in a vehicle in relation to a control of an automatic transmission in the vehicle, comprising the steps, when said automatic transmission is shifted between two speed stages, of:
- monitoring input rotational speed of said automatic transmission so as to detect first and second predetermined values thereof along with change of said input rotational speed due to the speed stage shifting of said automatic transmission so as to dispatch first and second signals corresponding to traversing of said first and second values, respectively;
starting a first control operation for the engine to decrease output torque thereof in response to said first signal;
starting a time counting in response to said second signal; and
starting a second control operation for the engine in response to a predetermined counting of time by said time counting to regain the output torque thereof by canceling the decrease of output torque thereof due to said first control operation.
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Accused Products
Abstract
In controlling an internal combusion engine so as to temporarily decrease output torque thereof in relation to speed stage shifting of an automatic transmission connected therewith, input rotational speed of the automatic transmission is monitored so as to obtain first and second subsequent time points corresponding to traversing of first and second predetermined values of the input rotational speed along with change thereof due to the speed stage shifting of the transmission, and a control for decreasing engine output torque is triggered at the first time point, while the cancellation of the decreasing of engine output torque is triggered at a time point which is counted by a timer starting from the second time point.
27 Citations
4 Claims
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1. A method of controlling an internal combustion engine in a vehicle in relation to a control of an automatic transmission in the vehicle, comprising the steps, when said automatic transmission is shifted between two speed stages, of:
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monitoring input rotational speed of said automatic transmission so as to detect first and second predetermined values thereof along with change of said input rotational speed due to the speed stage shifting of said automatic transmission so as to dispatch first and second signals corresponding to traversing of said first and second values, respectively; starting a first control operation for the engine to decrease output torque thereof in response to said first signal; starting a time counting in response to said second signal; and starting a second control operation for the engine in response to a predetermined counting of time by said time counting to regain the output torque thereof by canceling the decrease of output torque thereof due to said first control operation. - View Dependent Claims (2, 3, 4)
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Specification