| 释义 |
timing, vbl. n.|ˈtaɪmɪŋ|
[f. time v. + -ing1.]
The action of time v. in various senses.
†1. Happening, occurrence, hap; (good or ill) fortune; an event, occurrence, case. Obs.
c1250Gen. & Ex. 31 Almiȝtin louerd, heȝest kinge ðu giue me seli timinge. Ibid. 1194 Swilc timing was hire bi-tid. Ibid. 2644 Bissop Eliopoleos Saȝ ðis timing, & up he ros. c1310K. Horn 164 Crist him ȝeue god tymyng. c1400Brut clxviii. 191 Thus staterand Scottes,..Erly in a mornyng in an euel tyming went ȝe fro Dunbarr.
2. a. The fixing, ascertaining, noting, or recording of time: see time v.; in Cricket, see quot. 1893.
1597Morley Introd. Mus. 9 Phi. What is the timing of a note? Ma. It is a certayne space or length, wherein a note may be holden in singing. 1656Eirenicon 20 Let thy charity advance To give them timeing of an Ordinance. 1658–9in Burton's Diary (1828) III. 154 There is no exception against the petition, but against the timing of it. 1693J. Edwards Author. O. & N. Test. 357 Josephus is often faulty as to the timing of things. a1711Ken Psyche Poet. Wks. 1721 IV. 278 The Voice, the Lute, the Passion sweet and strong, The Timing, the adapting of the Song. 1863Boys' Jrnl. I. 264/1 He..showed us all the power and velocity resulting from hitting the balls at the right time. He called this the art of timing. 1889W. M. Acworth Railways Eng. 202 The acceleration over the ordinary timing of the 2 p.m. was no more than 4 minutes. 1893W. L. Murdoch Cricket 29 Timing is the working in perfect unison of the hands, arms, legs and all the necessary muscles which are subservient to the eye. 1908Daily News 7 Dec. 9 This, considering the heavy state of the roads, was excellent timing.
b. attrib. and Comb., as timing box, timing nut, timing screw, timing valve, timing-wheel.
1884F. J. Britten Watch & Clockm. 264 Timing Box [see time v. 2 c]. Ibid. 265 [The] Timing Screws [are] four screws or nuts placed at equal distances round the rim of a watch compensation balance,..used for getting the watch to mean time. Ibid., In a marine chronometer there are two timing nuts. 1898Timing valve [see time v. 7]. 1907Westm. Gaz. 21 Nov. 4/2 All the timing-wheels are made of fibre and brass, and are contained in an oil-tight aluminium case in front of the engine [of a motor-car].
3. In an internal-combustion engine, the times when the valves open and close, and the time of the ignition spark, in relation to the movement of the piston in the cylinder. Freq. attrib., as timing diagram; timing chain, the chain that drives the camshaft of an engine from the crankshaft, part of the timing gear; timing gear, the mechanism by which the valves of an internal-combustion engine are made to open and close at the right moment; timing mark, each of the marks on an engine that are used as guides when assembling the timing gear or altering the valve timing.
1915V. W. Pagé Automobile Repairing made Easy iii. 304 In these diagrams the timing used is: Inlet opens at 8 degrees past the upper center; [etc.] Ibid. 306 Two typical valve timing diagrams, one for a four cyclinder engine having a flywheel diameter of 153/4 inches, the other of a six cylinder engine are given. 1929― Ford Model A Car vii. 270 (caption) Diagram showing timing marks on crankshaft and camshaft timing gears of Ford model A engines. 1935F. J. Camm Practical Motorist's Encycl. 319/1 Timing chain. 1970K. Ball Fiat 600 D Autobook i. 20/1 Replace and secure timing gear gasket, cover and crankshaft oilseal. Ibid., Install camshaft, crankshaft sprockets with timing chain so that timing marks are adjacent. 1977Hot Car Oct. 81/1 When setting the timing on a Mini engine with a stroboscopic light, it is often difficult to see the timing marks. 1977‘J. Fraser’ Hearts Ease ix. 107 That lorry..needed the tappets adjusting. And I don't think the timing was right. |