Apparatus and method for detecting running resistance of a vehicle
First Claim
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1. An apparatus for detecting running resistance of a vehicle comprising:
- engine load detection means for detecting engine load;
running resistance computation means for computing vehicle running resistance based on parameters including at least the engine load detected by said engine load detection means, and outputting a signal for the computed running resistance; and
computation stopping means for stopping computation of the running resistance by said running resistance computation means when there is a rapid change in the engine load detected by said engine load detection means, and the engine load is changing increasingly.
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Abstract
A change amount ΔTVO is computed as a deviation of a new value for the throttle opening representing engine load from a previous value. When the change amount ΔTVO is greater than or equal to a positive judgment level TH and engine load is changing rapidly in an increasing direction, computation of running resistance using a detected value for the throttle opening is stopped. However, since when the throttle opening is stable or the throttle opening is changing reducingly, a necessary and sufficient computational accuracy can be maintained, computation of the running resistance is not stopped, and control is carried out based on the computational results.
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Citations
10 Claims
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1. An apparatus for detecting running resistance of a vehicle comprising:
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engine load detection means for detecting engine load; running resistance computation means for computing vehicle running resistance based on parameters including at least the engine load detected by said engine load detection means, and outputting a signal for the computed running resistance; and computation stopping means for stopping computation of the running resistance by said running resistance computation means when there is a rapid change in the engine load detected by said engine load detection means, and the engine load is changing increasingly.
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2. An apparatus for detecting running resistance of a vehicle comprising:
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engine load detection means for detecting engine load; running resistance computation means for computing vehicle running resistance based on parameters including at least the engine load detected by said engine load detection means, and outputting a signal for the computed running resistance; and computation stopping means which judges if the engine load detected by said engine load detection means is changing rapidly based on a judgment level which differs depending on the change direction of the engine load, and stops computation of the running resistance by said running resistance computation means when there is a rapid change in said engine load. - View Dependent Claims (3, 4, 5)
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6. A method of detecting running resistance of a vehicle including detecting engine load and computing vehicle running resistance based on parameters including at least the detected engine load, and stopping said computation of running resistance when there is a rapid change in said engine load and said engine load is changing increasingly.
- 7. A method of detecting running resistance of a vehicle including detecting engine load and computing vehicle running resistance based on parameters including at least the detected engine load, and judging if the engine load is changing rapidly based on a judgment level which differs depending on the change direction of the engine load, and stopping said computation of running resistance when there is a rapid change in said engine load.
Specification