GB2395562A - Vehicle speed detecting apparatus - Google Patents
Vehicle speed detecting apparatus Download PDFInfo
- Publication number
- GB2395562A GB2395562A GB0227397A GB0227397A GB2395562A GB 2395562 A GB2395562 A GB 2395562A GB 0227397 A GB0227397 A GB 0227397A GB 0227397 A GB0227397 A GB 0227397A GB 2395562 A GB2395562 A GB 2395562A
- Authority
- GB
- United Kingdom
- Prior art keywords
- vehicle speed
- speed detecting
- pump
- oil
- detecting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/26—Devices characterised by the use of fluids
- G01P3/28—Devices characterised by the use of fluids by using pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/36—Inputs being a function of speed
- F16H59/44—Inputs being a function of speed dependent on machine speed of the machine, e.g. the vehicle
Abstract
A vehicle speed detecting apparatus, which is capable of obtaining accurate vehicle speed and obtaining the accurate vehicle speed for a long period of time, is provided. For this purpose, the vehicle speed detecting apparatus includes a vehicle speed detecting pump (112, 212) which is provided at lower travelling equipment and connected to an output shaft of a transmission (111, 211); an oil pressure swivel joint (115, 215) which is provided at a connecting part of the lower travelling equipment and an upper revolving superstructure; and a vehicle speed detecting motor (116, 216) driven by the vehicle speed detecting pump, a vehicle speed sensor (118) for detecting a rotational speed signal of the vehicle speed detecting motor to produce a vehicle speed detecting signal, and a controller (120) for calculating vehicle speed according to the vehicle speed detection signal to perform a traveling control such as speed gear selection of the transmission, which are provided at the upper revolving superstructure.
Description
V EHI C LE S PEED D ETECTI N G APPARATU S
Technical Field
5 The present invention relates to a vehicle speed detecting apparatus.
Background Art
10 As a vehicle speed detecting apparatus, there is conventionally the one, for example, as shown in FIG. 3. The vehicle speed detecting apparatus includes a vehicle speed detecting pump 12 which is driven by a transmission 11, and it detects oil pressure of pressure oil, which is discharged by the 15 vehicle speed detecting pump 12, by means of an oil pressure sensor 13. An oil pressure signal detected by the oil pressure sensor 13 is sent to a controller 14, and the controller 14 calculates the vehicle speed according to the oil pressure signal (for example, Japanese Patent Laid-open No. 20 2001-235032). Reference numeral 10 in FIG. 3 denotes a suction and delivery valve.
Another vehicle speed detecting apparatus includes an electromagnetic pick-up sensor 15 to detect rotational speed of an output shaft (not shown) of a transmission 11A provided at 25 lower travclling equipment (not shown), as shown in FIG. 4.
In order that a detection signal being an electric signal, which is detected by the electromagnetic pick-up sensor 15, is sent to an upper revolving superstructure (not shown), it is sent to a controller 14A via a slip ring 16, and the controller 14A 5 calculates vehicle speed corresponding to the electric signal.
However, in the vehicle speed detecting apparatus as shown in FIG. 3, the vehicle speed is detected according to an oil pressure signal, and therefore if the oil temperature differs according to increase and decrease in air temperature and 10 workload of the hydraulic devices, viscosity of oil differs to a large extent. As a result, when the temperature of the oil is low, the viscosity of oil becomes high, and the resistance of a conduit line through which the pressure oil passes becomes large, thus increasing pressure loss and making the vehicle 15 speed higher than actual vehicle speed. When the oil temperature is high, the viscosity of oil becomes low, and the resistance of the conduit line through which the pressure oil passes becomes small, thus decreasing the pressure loss and making the vehicle speed lower than the actual vehicle speed.
20 Namely, since the oil pressure of pressure oil which is discharged by the vehicle speed detecting pump 12 does not become hydraulic pressure corresponding to the vehicle speed, it is difficult to obtain accurate vehicle speed.
The vehicle speed detecting apparatus using a detection 25 signal detected by the electromagnetic pick-up sensor 15
includes a transmission at the lower travelling equipment, and sends a detection signal being an electric signal for detection of the vehicle speed to the upper revolving superstructure.
The detection signal has to be sent via the slip ring 16, and if 5 the slip ring 16 through which the electric signal passes deteriorates, a noise occurs, which makes it impossible to send the electric signals to detect accurate vehicle speed.
Accordingly, with use of such a vehicle speed detecting apparatus, it is difficult to obtain accurate vehicle speed for a 10 long period of time in such a vehicle as includes transmission in the lower travelling equipment, and needs to send a detection signal being an electric signal for detection of the vehicle speed to the upper revolving superstructure.
15 Summary of the Invention
The present invention is made in view of the above-described problems, and has its object to provide a vehicle speed detecting apparatus which can obtain accurate 20 vehicle speed. Further, the present invention has another object to provide a vehicle speed detecting apparatus which can obtain accurate vehicle speed for a long period of time in a vehicle which includes a transmission in lower travelling equipment and needs to send a detection signal being an 25 electric signal for detection of the vehicle speed to an upper
revolving superstructure.
In order to attain the above-described object, a first aspect of the vehicle speed detecting apparatus according to the present invention includes a vehicle speed detecting pump 5 connected to an output shaft of a transmission; a vehicle speed detecting motor which is driven by the vehicle speed detecting pump; and vehicle speed detecting means for detecting vehicle speed according to a rotational speed signal of the vehicle speed detecting motor.
10 According to the above constitution, by the amount of oil discharged by the vehicle speed detecting pump, the vehicle spell detecting motor is rotated at the rotational frequency proportional to the rotational frequency of the vehicle speed detecting pump. As a result, the rotational 15 frequency of the vehicle speed detecting pump and the rotational frequency of the vehicle speed detecting motor are not influenced by the change in viscosity of oil caused by an increase and decrease in the oil temperature, and therefore accurate vehicle speed can be detected.
20 A second aspect of the vehicle speed detecting apparatus according to the present invention includes a vehicle speed detecting pump which is provided at lower travelling equipment and is connected to an output shaft of a transmission; an oil pressure swivel joint which is provided at 25 a connecting part of the lower travelling equipment and an
s upper revolving superstructure; and a vehicle speed detecting motor driven by the vehicle speed detecting pump, a vehicle speed sensor for detecting a rotational speed signal of the vehicle speed detecting motor to produce a vehicle speed 5 detection signal, and a controller for calculating vehicle speed according to the vehicle speed detection signal to perform a travel control such as speed gear selection of the transmission, which are provided at the upper revolving superstructure.
According to the above constitution, by the oil amount 10 discharged by the vehicle speed detecting pump, the vehicle speed detecting motor is rotated at the rotational frequency proportional to the rotational frequency of the vehicle speed detecting pump. As a result, the rotational frequency of the vehicle speed detecting pump and the rotational frequency of 15 the vehicle speed detecting motor are not influenced by the change in viscosity of oil caused by an increase and decrease in the oil temperature, and therefore accurate vehicle speed can be detected. Further, it is not necessary to send the vehicle speed signal being an electric signal for detection of 20 the vehicle speed to the upper revolving superstructure, and therefore a slip ring to send the vehicle speed signal being an electric signal can be eliminated, thus making it possible to obtain accurate vehicle speed for a long period of time.
25 1Iricf Description of the Drawings
FIG. 1 is a system block diagram of a vehicle speed detecting apparatus according to a first embodiment of the present invention; FIG. 2 is a system block diagram of a vehicle speed 5 detecting apparatus according to a second embodiment of the present invention; FIG. 3 is a system block diagram of a conventional oil pressure detection type of vehicle speed detecting apparatus; and 10 FIG. 4 is a system block diagram of a conventional electric type of vehicle speed detecting apparatus.
Best Mode for Carrying out the Invention
15 A vehicle speed detecting apparatus according to the present invention will be explained with reference to the drawings. FIG. 1 is a system block diagram of a vehicle speed detecting apparatus of a first embodiment. FIG. 2 is a system block diagram of a vehicle speed detecting apparatus of 20 a second embodiment.
As shown in FIG. 1, a transmission 111 is provided with a vehicle speed detecting pump 112, and the vehicle speed detecting pump 112 is driven by the transmission 111. The vehicle speed detecting pump 112 is a bidirectional rotary 25 pump, which discharges pressure oil by rotation in a right and
a left directions. A discharge port 112R of the vehicle speed detecting pump 112 is connected to a port A of the suction and delivery valve 114 and a discharge port 112L is connected to a port B of the suction and delivery valve 114.
5 The suction and delivery valve 114 includes suction check valves 114a and 114b therein, and a circuit between the suction check valve 114a and the suction check valve 114b is connected to a port T of the suction and delivery valve 114.
The suction and delivery valve 114 includes discharge check 10 valves 114c and 114d therein, and a circuit between the discharge check valve 114c and the discharge check valve 114d are connected to a port C of the suction and delivery valve 114. A working vehicle (not shown) includes lower 15 travelling equipment (not shown) and an upper revolving superstructure (not shown). The upper revolving superstructure includes a working implement (not shown), and an oil pressure swivel joint 115 is provided at a connecting part of the lower travelling equipment and the upper revolving 20 superstructure. The transmission 111 is provided at the lower travelling equipment, and a controller 120 is provided at the upper revolving superstructure. The port T of the suction and delivery valve 114 is connected to an oil tank 113 via the oil pressure swivel joint 115. The port C of the suction and 25 delivery valve 114 is connected to an oil inlet port 116S of a
vehicle detecting motor 116 via the oil pressure swivel joint 115. An oil outlet port 116T of the vehicle speed detecting motor 116 is connected to an oil tank 113 via the oil pressure swivel joint 115 provided at the connecting part of the lower 5 travelling equipment and the upper revolving superstructure.
A throttle valve 131 for detecting the vehicle speed is provided at a circuit between the oil outlet port 116T of the vehicle speed detecting motor 116 and the oil pressure swivel joint 115 to give predetermined back pressure to a discharge circuit of 10 the vehicle speed detecting motor 116.
A vehicle speed detecting gear 117 for generating a vehicle speed signal is provided at an output shaft of the rotational vehicle speed detecting motor 116, and it is rotated by the vehicle speed detecting motor 116. For example, a 15 predetermined number of teeth, slits, and projections and depressions are formed on an outer circumference of the vehicle speed detecting gear 117. A vehicle speed detecting sensor 118 is provided in close vicinity to the outer circumference of the vehicle speed detection gear 117, and 20 outputs, for example, pulse, which occurs when a predetermined number of teeth on the outer circumference of the vehicle speed detecting gear 117 pass through a signal detecting section of the vehicle speed detecting sensor 118, as an electric signal.
25 As for the capacity of the vehicle speed detecting
motor 116, it may be a motor with a smaller capacity than the capacity of the vehicle speed detecting pump 112. For example, the capacity of the vehicle speed detecting motor 116 is made one fifth of the capacity of the vehicle speed detecting S pump 112, the rotational frequency of the vehicle speed detecting motor 116 is made five times as high as the rotational frequency of the vehicle speed detecting pump 112, and the pulse generated by the vehicle speed detecting gear 117 is made high frequency, whereby the vehicle speed 10 detection sensor 118 can detect a vehicle speed signal with st ah i I it y.
The vehicle speed detecting sensor 118 is connected to.
the controller 120, and sends a vehicle speed signal to the controller 120 as an electric signal. The vehicle speed 15 detecting means has the constitution having the vehicle speed detecting gear 117, the vehicle speed detecting sensor 118 and the controller 120 as described above. The controller 120 calculates the vehicle speed by operation processing of a vehicle speed signal, and performs a travelling control such as 20 speed gear selection ol the transmission 111.
Next, an operation of the vehicle speed detecting apparatus of the first embodiment will be explained. When the working vehicle (not shown) travels forward, and the transmission 111 is operated, the vehicle speed detecting pump 25 112 is driven to rotate rightward at a rotational frequency
corresponding to the vehicle speed. The vehicle speed detecting pump 112 sucks oil through the port B of the suction and delivery valve 114 via the oil pressure swivel joint 115 and the suction check valve 114b from the oil tank 113, and 5 discharges pressure oil through the discharge port 112R of the vehicle speed detecting pump 112.
The pressure oil discharged from the vehicle speed detecting pump 112 enters the port A of the suction and delivery valve 114, and via the discharge check valve 114c, it 10 enters the oil inlet port 116S of the vehicle speed detecting motor 116 from the port C of the suction and delivery valve 114 via the oil pressure swivel joint 115 to rotate the vehicle speed detecting motor 116. Thereupon, the vehicle detecting gear 117 is rotated by the vehicle speed detecting motor 116, 15 and the vehicle speed detecting sensor 118 outputs pulse, which is generated from the vehicle speed detecting gear 117, as a vehicle speed signal that is an electric signal and sends it to the controller 120. The controller 120 performs operation processing of the vehicle speed signal received from the 20 vehicle speed detecting sensor 118 and calculates the vehicle speed, and performs a travelling control such as the speed gear selection of the transmission 111.
When the working vehicle travels rearward and the transmission 111 is operated, the vehicle speed detecting pump 25 112 is similarly driven at the rotational frequency
corresponding to the vehicle speed to be rotated leftward.
The vehicle speed detecting pump 112 sucks oil through the port A of the suction and delivery valve 114 via the oil pressure swivel joint 115 and the suction check valve 114a 5 from the oil tank 113. It discharges the pressure oil from the discharge port 112L of the vehicle speed detecting pump 112 to rotate the vehicle speed detecting motor 116 as in the above description, and the vehicle speed detecting sensor 118 outputs
the pulse, which is generated from the vehicle speed detecting 10 gear 117, as a vehicle speed signal being an electric signal and sends it to the controller 120. The controller 120 performs operation processing of the vehicle speed signal received from the vehicle speed detecting sensor 118 to calculate the vehicle speed, and performs a travelling control such as speed gear 15 selection of the transmission 111.
Accordingly, the circuit in which the vehicle speed detecting motor 116 is rotated proportionally to the amount of oil discharged from the vehicle detecting pump 112 is provided, and therefore the rotational frequency of the vehicle speed 20 detecting pump 112 and the rotational frequency of the vehicle speed detecting motor 116 are not influenced by the change in the viscosity of the oil occurring due to increase and decrease in the oil temperature, thus making it possible to detect accurate vehicle speed. Since it is not necessary to send a 25 vehicle speed signal being an electric signal for vehicle speed
detection to the upper revolving superstructure, a slip ring to send the vehicle speed signal being an electric signal can be eliminated, and therefore accurate vehicle speed can be obtained for a long period of time. Incidentally, when the 5 vehicle speed detecting apparatus of this embodiment is applied to a vehicle, which does not include an upper revolving superstructure, only the oil pressure swivel joint 115 is omitted.
Next, a vehicle speed detecting apparatus of a second 10 embodiment will be explained. The same components as in the embodiment shown in FIG. 1 are given the same reference numerals and symbols, and the explanation thereof will be omitted. As shown in FIG. 2, a transmission 211 is provided 15 with a vehicle speed detecting pump 212, and the vehicle speed detecting pump 212 is driven by the transmission 211.
The vehicle speed detecting pump 212 is a bidirectional rotary pump, which discharges pressure oil by rotation in a right and a left directions. A discharge port 212R of the vehicle speed 20 detecting pump 212 is connected to an oil inlet port 216R of a vehicle speed detecting motor 216 via an oil pressure swivel joint 215. A discharge port 212L of the vehicle speed detecting pump 212 is connected to an oil inlet port 216L of the vehicle speed detecting motor 216 via the oil pressure 25 swivel joint 215. The vehicle speed detecting motor 216 is a
bidirectional rotary motor, which rotates in a right and left directions. A charge pump 214 is connected to an oil tank 213, and sucks oil. A relief valve 220 is provided at a midpoint in a discharge circuit of the charge pump 214, and 5 relieves discharge oil exceeding a predetermined pressure of the charge pump 214 to an oil tank 213.
The discharge circuit of the charge pump 214 is connected to a circuit between a suction check valve 218a and a suction check valve 218b. The suction check valve 218a is 10 connected to a side near the vehicle speed detecting pump 212, of a circuit connecting the discharge port 212R of the vehicle speed detecting pump 212 and the oil inlet port 216R of the vehicle speed detecting motor 216. The suction check valve 218b is connected to a side near the vehicle speed detecting 15 pump 212, of a circuit connecting the discharge port 212L of the vehicle speed detecting pump 212 and the oil inlet port 216L of the vehicle speed detecting motor 216.
The discharge oil of the charge pump 214 is supplied to the vehicle speed detecting pump 212 via the oil pressure 20 swivel joint 215 to replenish insufficient amount of oil to keep the hydraulic pressure of a circuit between the vehicle speed detecting pump 212 and the vehicle speed detecting motor 216 at a predetermined pressure.
A discharge check valve 219a is connected to a side 25 near the vehicle speed detecting motor 216, ol the circuit
connecting the discharge port 212R of the vehicle speed detecting pump 212 and the oil inlet port 216R of the vehicle speed detecting motor 216. A discharge check valve 219b is connected to a side near the vehicle speed detecting motor 216, 5 of the circuit connecting the discharge port 212L of the vehicle speed detecting pump 212 and the oil inlet port 216L of the vehicle speed detecting motor 216.
A circuit between the discharge check valve 219a and the discharge check valve 219b is connected to a discharge 10 relief valve 217. The discharge relief valve 217 is connected to the oil tank 213, and when pressure oil of the circuit between the vehicle speed detecting pump 212 and the vehicle speed detecting motor 216 becomes a predetermined pressure or more, it relieves the pressure oil to the oil tank 213.
15 A working vehicle (not shown) includes lower travelling equipment (not shown) and an upper revolving superstructure (not shown), and the upper revolving superstructure includes a working implement (not shown).
The oil pressure swivel joint 215 is provided at the connecting 20 part of the lower traveling equipment and the upper revolving superstructure. The transmission 211 is provided at the lower travelling equipment, and the controller 120 is provided at the upper revolving superstructure. The vehicle speed detecting gear 117 for producing a vehicle speed signal is 25 provided at the output shaft of the rotational vehicle speed
detecting motor 216, and it is rotated by the vehicle speed detecting motor 216. The vehicle speed detecting sensor 118 is provided in close vicinity of the outer circumference of the vehicle speed detecting gear 117, and generates an electric 5 signal as a vehicle speed signal. The vehicle speed detection sensor 118 is connected to the controller 120 and the controller 120 performs operation processing of the vehicle signal to calculate the vehicle speed.
The capacity of the vehicle speed detecting motor 216 10 is made the same as the capacity of the vehicle speed detecting pump 212, and the rotational frequency of the vehicle speed detecting pump 212 becomes the same rotational frequency of the rotational frequency of the vehicle speed detecting motor 216. Accordingly, the rotational frequency of the vehicle 15 speed detecting pump 212 and the rotational frequency of the vehicle speed detecting motor 216 are not influenced by the change in viscosity of oil, which is caused by increase and decrease in the oil temperature.
Next, an operation of the vehicle speed detecting 20 apparatus of the second embodiment will be explained. When the working vehicle travels forward and the transmission 211 is operated, the vehicle speed detecting pump 212 is driven to rotate rightward at the rotational frequency corresponding to the vehicle speed. The pressure oil discharged from the 25 discharge port 212R ot the vehicle speed detecting pump 212
enters the oil inlet port 216R of the vehicle speed detecting motor 216 via the oil pressure swivel joint 215, and rotates the vehicle speed detecting motor 216. The pressure oil, which exits from the oil inlet port 216L of the vehicle speed 5 detecting motor 216 enters the discharge port 212L of the vehicle speed detecting pump 212. The pressure oil is circulated in this manner to rotate the vehicle speed detecting motor 216 rightward.
Thereupon, the vehicle speed detecting gear 117 is 10 rotated by the vehicle speed detecting motor 216, and the vehicle speed detecting sensor 118 outputs pulse, which is generated by the vehicle speed detecting gear 117, as the vehicle speed signal being an electric signal, and sends it to the controller 120. The controller 120 performs operation 15 processing of the vehicle speed signal received from the vehicle speed detecting sensor 118 to calculate the vehicle speed, and performs a travelling control such as speed gear selection of the transmission 211.
When the working vehicle travels rearward and the 20 transmission 211 is operated, the vehicle speed detecting pump 212 is similarly driven to rotate leftward at the rotational frequency corresponding to the vehicle speed. The vehicle speed detecting pump 212 operates as described above and rotates the vehicle speed detecting motor 216 leftward. The 25 vehicle speed detecting sensor 118 outputs pulse, which is
r generated by the vehicle speed detecting gear 117, as the vehicle speed signal being an electric signal, and sends it to the controller 120. The controller 120 performs operation processing of the vehicle speed signal received from the S vehicle speed detecting sensor 118 to calculate the vehicle speed, and performs a travelling control such as speed gear selection of the transmission 211.
Accordingly, the circuit is formed, in which by the amount of oil discharged by the vehicle speed detecting pump 10 212, the vehicle speed detecting motor 216 is rotated at the same rotational frequency as the vehicle speed detecting pump 212. Consequently, the rotational frequency of the vehicle speed detecting pump 212 and the rotational frequency of the vehicle speed detecting motor 216 are not influenced by the 15 change in viscosity of oil, which is caused by increase and decrease in the oil temperature, and therefore accurate vehicle speed can be detected. Since it is not necessary to send the vehicle speed signal being an electric signal for detection of the vehicle speed to the upper revolving superstructure, a slip 20 ring to send the vehicle signal being the electric signal can be eliminated, and therefore accurate vehicle speed can be obtained for a long period of time. When the vehicle speed detecting apparatus of the present invention is applied to a vehicle which does not include the upper revolving 25 superstructure, only the oil pressure swivel joint 215 needs to
be omitted.
Claims (2)
1. A vehicle speed detecting apparatus, comprising: a vehicle speed detecting pump (112, 212) connected to 5 an output shaft of a transmission (111, 211); a vehicle speed detecting motor (116, 216) which is driven by said vehicle speed detecting pump (112, 212); and vehicle speed detecting means for detecting vehicle speed according to a rotational speed signal of said vehicle 10 speed detecting motor (116, 216).
2. A vehicle speed detecting apparatus, comprising: a vehicle speed detecting pump (112, 212), which is provided at lower travelling equipment, and is connected to an 15 output shaft of a transmission (111, 211); an oil pressure swivel joint (115, 215) which is provided at a connecting part of said lower travelling equipment and an upper revolving superstructure; and a vehicle speed detecting motor (116, 216) driven by 20 said vehicle speed detecting pump (112, 212), a vehicle speed sensor (118) for detecting a rotational speed signal of said vehicle speed detecting motor (116, 216) to produce a vehicle speed detection signal, and a controller (120) for calculating vehicle speed according to said vehicle speed detection signal 25 to perform a travelling control such as speed gear selection of
said transmission (111, 121), which are provided at said upper revolving superstructure.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0227397A GB2395562A (en) | 2002-11-23 | 2002-11-23 | Vehicle speed detecting apparatus |
| JP2003380105A JP2004176916A (en) | 2002-11-23 | 2003-11-10 | Speed detector for vehicle |
| CNA2003101180179A CN1510422A (en) | 2002-11-23 | 2003-11-20 | Vehicle speed detector |
| DE10354197A DE10354197A1 (en) | 2002-11-23 | 2003-11-20 | Vehicle speed detection device, in particular for a work vehicle with undercarriage and rotating superstructure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0227397A GB2395562A (en) | 2002-11-23 | 2002-11-23 | Vehicle speed detecting apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0227397D0 GB0227397D0 (en) | 2002-12-31 |
| GB2395562A true GB2395562A (en) | 2004-05-26 |
Family
ID=9948419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0227397A Withdrawn GB2395562A (en) | 2002-11-23 | 2002-11-23 | Vehicle speed detecting apparatus |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2004176916A (en) |
| CN (1) | CN1510422A (en) |
| DE (1) | DE10354197A1 (en) |
| GB (1) | GB2395562A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114184808B (en) * | 2021-12-06 | 2023-11-03 | 中航贵州飞机有限责任公司 | Test inspection device before aircraft wheel speed sensor is adorned |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5277286A (en) * | 1991-11-06 | 1994-01-11 | Honda Giken Kogyo Kabushiki Kaisha | Method of controlling automatic clutch for motor vehicles |
| JPH0821847A (en) * | 1994-07-06 | 1996-01-23 | Kubota Corp | Vehicle speed detecting device for work vehicle |
| JP2001235032A (en) * | 2000-02-24 | 2001-08-31 | Komatsu Ltd | Hydraulic travel drive |
-
2002
- 2002-11-23 GB GB0227397A patent/GB2395562A/en not_active Withdrawn
-
2003
- 2003-11-10 JP JP2003380105A patent/JP2004176916A/en not_active Withdrawn
- 2003-11-20 DE DE10354197A patent/DE10354197A1/en not_active Withdrawn
- 2003-11-20 CN CNA2003101180179A patent/CN1510422A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5277286A (en) * | 1991-11-06 | 1994-01-11 | Honda Giken Kogyo Kabushiki Kaisha | Method of controlling automatic clutch for motor vehicles |
| JPH0821847A (en) * | 1994-07-06 | 1996-01-23 | Kubota Corp | Vehicle speed detecting device for work vehicle |
| JP2001235032A (en) * | 2000-02-24 | 2001-08-31 | Komatsu Ltd | Hydraulic travel drive |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004176916A (en) | 2004-06-24 |
| GB0227397D0 (en) | 2002-12-31 |
| CN1510422A (en) | 2004-07-07 |
| DE10354197A1 (en) | 2004-06-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| COOA | Change in applicant's name or ownership of the application |
Owner name: KOMATSU LTD Free format text: FORMER APPLICANT(S): KOMATSU UK LIMITED |
|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |