1. An engine measuring equipment for measuring engine performance in bench tests implemented with an engine and a dynamometer connected to the engine, the engine measuring equipment comprising:
a central control unit for controlling throttle opening degrees due to revolution of the engine and load torque of the dynamometer;
a detector connected to an output shaft of the engine, for detecting measurement data including at least revolution and shaft torque of the engine driven by controlling the central control unit; and
a signal processing unit for measuring engine torque based on measurement data from the detector,
wherein the central control unit implements such controlling that the revolution is lead to a transient state, and wherein the shaft torque varies during a period of the transient state; and
wherein the signal processing unit calculates the engine torque based on time series data of the revolution and the shaft torque detected with the detector to measure engine torque from transient state data.
2. The engine measuring equipment according to claim 1, wherein the engine torque is calculated by performing computing process including time differentiation of the time series data of the revolution andor shaft torque.
3. The engine measuring equipment according to claim 1 or 2, wherein the central control unit performs control operation so that the load torque is increased or decreased sequentially by each predetermined value while the throttle opening degrees changes for at least one cycle from the minimum value to the maximum value at each step of the predetermined value.
4. The engine measure equipment according to claim 1 or 2, further comprising a display unit for displaying characteristics of relationship between the engine torque and the revolution.
5. The engine measuring equipment according to claim 1 or 2, further comprising an assessing unit for implementing validity assessment on the test conditions andor reliability assessment on the measurement data, andor effectiveness assessment on the correction data and engine torque calculated on the basis of the measurement data.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A locking system for attaching a first workpiece to a second workpiece comprising:
an opening in said first workpiece for receiving a screw having a threaded first end, an opposite head end, and a collar having external threads, said collar rotatingly affixed about a head of said screw; and
complimentary locking threads in said opening in said first workpiece for engaging said collar to said first workpiece at said head such that axial and rotational movement of said screw is restricted when said first workpiece is affixed to said second workpiece by urging and rotating said threaded first end of said screw into said second workpiece.
2. The locking system of claim 1, wherein said head is substantially spherical.
3. The locking system of claim 2 wherein said threaded collar has a concave screw head retaining cavity, said substantially spherical head of said screw adapted to be rotatingly secured within said cavity.
4. The system of claim 1 further comprising a wrench having an outer body with outwardly extending blades and an inner rod rotatably extending through an inner passage of said body, said rod having a screw face portion extending beyond a base of said body and adapted to engage said opposite head end of said screw, said blades adapted to engage a slot in a top face of said collar.
5. A fastener system for joining a first workpiece to a second workpiece comprising:
a screw having a head and a threaded body section, said head having a top section to facilitate rotation of said screw; and
a locking collar having a top surface, a top opening, a bottom opening, a smooth, inner cavity, and a threaded outer wall, said threaded outer wall cooperating with a complimentary threaded inner surface of a collar receiving opening in said first workpiece to releasably secure said collar in said first workpiece when said collar is rotated in said collar receiving opening in a first direction of rotation, said inner cavity adapted to rotatingly retain and hold said head of said screw with said head top section exposed through said top opening of said locking collar and said threaded body section of said screw extending outwardly from said bottom opening of said locking collar sufficiently to engage and join said second workpiece when said threaded body section of said screw is rotatably urged against said second workpiece in a second direction of rotation.
6. The fastener system of claim 5 wherein said first and second directions of rotation are the same hand.
7. The fastener system of claim 5 wherein said first and second directions of rotation are opposite hand.
8. A fastener system of claim 5 further comprising a wrench having an outer body with outwardly extending blades, an inner rod rotatably extending through an inner passage of said body, said rod having a face portion extending beyond a base of said body and adapted to engage said top section of said head of said screw, said blades adapted to engage a slot in said top surface of said locking collar.