A speed control method for static pressure driving vehicle downhill
A speed control, static pressure technology, applied in the direction of speed/acceleration control, non-electric variable control, control device, etc., can solve the problems of brake pad wear, vehicle runaway, overspeed of internal combustion engine 1, etc., to reduce the influence of drag torque , Improve operating safety and reduce the effect of dragging
Active Publication Date: 2021-04-02
MCC BAOSTEEL TECH SERVICE
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Problems solved by technology
The first method cannot achieve speed control, and when its own inertia is large, it is very easy to cause the vehicle to lose control, and it is very easy to cause the internal combustion engine 1 to overspeed, causing permanent damage to it; the second method achieves speed through the driver's continuous braking. control, but this method is likely to cause severe wear of the brake pads, easily cause brake failure, and cause accidents
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[0041] The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.
[0042] It should be noted that the structures, proportions, sizes, etc. drawn in the drawings of this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present invention. Therefore, there is no technical substantive meaning, and any modification of structure, change of proportional relationship or adjustment of size shall still fall within the scope of the disclosure of the present invention without affecting the functions and objectives of the present invention. within the scope of technical content. At the same time, terms such as "upper", "lo...
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The invention relates to a speed control method and device for driving a vehicle to run downhill under a static pressure. A slowing device is arranged between an internal combustion engine and an electric proportional closed pump; the slowing device can apply a resisting moment Tx to a rotating shaft of the electric proportional closed pump; and the direction of the resisting moment Tx is reverseto that of dragging rotational moment Tf. The speed control method for driving the vehicle to run downhill under the static pressure comprises the following steps of determining whether a static pressure-driven vehicle is in a downhill process or not; judging the value of a resultant moment Tr of a real-time resisting moment Tn of the internal combustion engine and loading moments Tm of other loads and the value of the dragging rotational moment Tf; when Tf is larger than Tr, enabling the slowing device to output the resisting moment Tx, wherein the value of the resisting moment Tx is as sameas the value of the resultant moment of Tr+Tf; otherwise, not enabling the slowing device to output the resisting moment Tx; monitoring whether the resisting moment Tx satisfies requirements or not inreal time; when the resisting moment Tx satisfies the requirements, keeping the resisting moment Tx to be invariable; and when the resisting moment Tx does not satisfy the requirements, adjusting thevalue of the resisting moment Tx of the slowing device to be equal to the value of the resultant moment of Tr+Tf, then keeping the adjusted resisting moment Tx to be invariable, and keeping monitoring.
Description
technical field [0001] The invention relates to the field of static pressure driven vehicles, in particular to a speed control method and device for a static pressure driven vehicle going downhill. Background technique [0002] The current static pressure driving method has been widely used in construction machinery, agricultural machinery and other vehicles, refer to figure 2 As shown, the internal combustion engine 1 of the static pressure drive vehicle drives the transmission mechanism 3 to rotate through the static pressure drive circuit 2, and the transmission mechanism 3 rotates to drive the drive wheel 4. The output shaft of the internal combustion engine 1 and the electric proportional closed pump 21 of the static pressure drive circuit 2 The rotating shaft is connected by transmission, and the electric proportional hydraulic motor 22 of the static pressure drive circuit 2 rotates to drive the transmission mechanism 3 . [0003] During downhill, refer to figure 1 ...
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IPC IPC(8): B60K17/10B60K31/00
CPCB60K17/10B60K31/00
Inventor 闫飞张吉胜杨骏谢明杨琳
Owner MCC BAOSTEEL TECH SERVICE