US4577718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlling the speed of a vehicle with internal combustion engine
Assignee: Bosch Corp
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Filing: 1984-05-03
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Granted: 1986-03-25
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Expires: 2004-05-03
Abstract
Abstract In an apparatus for controlling the speed of a vehicle driven by an internal combustion engine so as to maintain the vehicle speed at a target vehicle speed, the apparatus has a load detector for detecting the load condition of the engine at each instant and the PID control characteristics for the engine speed control are changed in accordance with the result detected by the load detector whereby the actual vehicle speed is maintained at the desired speed with high response characteristics.
Inventors
- 👤 Masahito Ueno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:10
CPC Classifications
B; B60; B60K; B60K31/00; B60K31/02; B60K31/04; B60K31/042; B60K31/045; B60K31/047; G; G05; G05B; G05B13/00; G05B13/02; G05D; G05D13/00; G05D13/66; B60W; B60W50/00; B60W2050/0001; B60W2050/0002; B60W2050/0008; B60W2050/0011; B60W2510/00; B60W2510/06; B60W2510/0638; B60W2510/10; B60W2510/1005
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
201 words
A vehicle speed controlling apparatus for controlling the speed of an internal combustion engine with PID control to maintain the speed of a vehicle driven by the internal combustion engine at a desired target vehicle speed, said apparatus, comprising: means for generating a first signal indicative of the desired target vehicle speed; means for generating a second signal relating to the actual vehicle speed at each instant; means for producing a load signal relating to the load of the internal combustion engine; a deviation detecting means responsive to the first and second signals for producing a third signal indicative of the deviation of the actual vehicle speed from the target vehicle speed; a signal generating means responsive to at least the load signal and the third signal for generating a control signal which has been signal processed in such a way that PID control of the speed of the internal combustion engine can be carried out in accordance with desired PID control characteristic dependent upon at least the load signal; and means responsive to the control signal for driving a speed adjusting member of the internal combustion engine so as to maintain the actual vehicle speed at the target vehicle speed.
Claim 2
Dependent Claim
201 words
A vehicle speed controlling apparatus for controlling the speed of an internal combustion engine with PID control to maintain the speed of a vehicle driven by the internal combustion engine at a desired target vehicle speed, said apparatus, comprising: means for generating a first signal indicative of the desired target vehicle speed; means for generating a second signal relating to the actual vehicle speed at each instant; means for producing a load signal relating to the load of the internal combustion engine; a deviation detecting means responsive to the first and second signals for producing a third signal indicative of the deviation of the actual vehicle speed from the target vehicle speed; a signal generating means responsive to at least the load signal and the third signal for generating a control signal which has been signal processed in such a way that PID control of the speed of the internal combustion engine can be carried out in accordance with desired PID control characteristic dependent upon at least the load signal; and means responsive to the control signal for driving a speed adjusting member of the internal combustion engine so as to maintain the actual vehicle speed at the target vehicle speed.
Claim 3
Dependent Claim
66 words
An appartus as claimed in claim 1, wherein said means for generating the second signal includes means for generating a speed signal representing the actual engine speed, means for generating a gear signal indicating the gear position at each instant, and means responsive to the speed signal and the gear signal for producing a signal indicating the vehicle speed at each instant as the second signal.
Claim 4
Dependent Claim
93 words
An apparatus as claimed in claim 1, wherein said signal generating means for generating a control signal has a setting means responsive to at least the load signal for producing a setting signal representing desired PID control characteristics for the PID control, a signal processing means processes the third signal as required for obtaining the desired PID control characteristics in response to the third signal and the setting signal, and means for producing an output signal representing a control variable based on the output from said signal processing means as the control signal.
Claim 5
Dependent Claim
34 words
An apparatus as claimed in claim 3, wherein the second signal is further applied to said setting means and the setting signal is produced in response to the load signal and the second signal.
Claim 6
Dependent Claim
59 words
An apparatus as claimed in claim 3, wherein said setting means has a memory storing a number of data representing various PID control characteristics therein and a desired data corresponding to the load signal is read out as the setting signal representing the PID control characteristics upon application of the load signal to the memory as an address signal.
Claim 7
Dependent Claim
66 words
An apparatus as claimed in claim 4, wherein said setting means has a memory storing a nummber of data representing various PID control characteristics therein and a desired data corresponding to the load signal and the second signal is read out as the setting signal representing PID control characteristics upon application of the load signal and the second signal to the memory as an address signal.
Claim 8
Dependent Claim
43 words
An apparatus as claimed in claim 1, wherein the internal combustion engine is a diesel engine, and the position of a fuel adjusting member of a fuel injection pump is adjusted in response to the control signal, whereby the vehicle speed is controlled.
Claim 9
Dependent Claim
32 words
An apparatus as claimed in claim 1, wherein the functions of said deviation detecting means and said signal generating means are carried out by execution of a program stored in a microcomputer.
References Cited (Backward Citations)
US4301883A
Cited
US4337839A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-24 | 1989-09-23 | 1990-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-24 | 1993-09-23 | 1994-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-24 | 1997-09-23 | 1998-03-25 | $7700.00 | Window Closed / Lapsed |