Abstract:
A spring return throttle actuator (1) including: an electric, plural-coil (C1, C2, C3), DC motor (2) having an output shaft 4, a throttle return spring (10), a gear transmission (5) connected to the output shaft, a control unit (CPU) adapted to control power supply to the DC motor (2), wherein the spring return throttle actuator (1) has a movement range between closed throttle and opened throttle. The control unit (CPU) is arranged to short-circuit at least two DC motor coils (C1, C2, C3) in order to create a DC motor return resist torque, and the return spring is balanced such that generated spring return torque over the whole movement range of the actuator does not exceed said DC motor return resist torque. The invention also relates to a method and a throttle assembly.
Abstract:
A test device (2) for testing a temperature sensor (4), which sensor comprises a temperature-dependent resistor (R2) with a resistance R and has a negative temperature coefficient, which test device comprises a measuring unit (6) adapted to determining the resistance R of R2 at a first time t1 and calling it R t1 . The test device (2) comprises a voltage supply circuit (8), a control unit (10), a switch (12) and a calculation unit (14), and the switch (12) is adapted to being controlled by the control unit (10) so that the voltage supply circuit (8) is connected and applies to the resistor R2 at time t1 a voltage pulse (16) with a predetermined voltage amplitude U T and a predetermined duration T. The measuring unit (6) is adapted to determining the resistance R of the resistor R2 immediately after the voltage pulse (16) at a second time t2 and calling it R t2 , to determining the resistance R of R2 after time t2 and to delivering the resistance values determined to said calculation unit (14) which is adapted to determining at least one measured value of a parameter which represents the change in the resistance after time t2 and to generating on the basis of said measured value an information signal (18) which is representative of the sensor's function.
Abstract:
A method and a system (200) for providing an auxiliary unit control profile for controlling an auxiliary unit (201) in a motor vehicle (202). The method comprises receiving travelling route data relating to a travelling route of the motor vehicle and based thereon identifying an expected future travelling route. Based on said expected future travelling route and on auxiliary unit operation data, an auxiliary unit control profile for controlling said auxiliary unit during travel along the expected future travelling route is determined in a processing unit (204). The auxiliary unit control profile is outputted to a control unit (206) configured to execute the auxiliary unit control profile and control the auxiliary unit based on said auxiliary unit control profile.
Abstract:
The invention relates to a measuring device (2) adapted to testing a liquid (4) used as reducing agent in connection with exhaust cleaning for exhaust gases from a combustion engine. The device comprises a temperature sensor (6) adapted to measuring the temperature in the liquid and an acoustic velocity measuring unit (8) adapted to measuring the acoustic velocity in the liquid. The temperature sensor is adapted to determining a first temperature T1 for the liquid and to delivering on the basis thereof a temperature signal (12) to a calculation unit (10); the acoustic velocity measuring unit (8) is adapted to determining a first acoustic velocity v1 for the liquid at the temperature T1 and to delivering on the basis thereof an acoustic velocity signal (14) to the calculation unit (10). The temperature sensor (6) is further adapted to determining a second temperature T2 for the liquid and to delivering on the basis thereof a temperature signal (12) to the calculation unit (10), which is adapted to calculating the absolute value of a temperature difference ?T between T1 and T2, i.e. ΔT = ΙT1-T2 Ι, and to comparing ΔT with a predetermined threshold value T TH . If ΔT exceeds T TH , a control signal (16) is delivered to the acoustic velocity measuring unit (8) to determine a second acoustic velocity v 2 for the liquid at the temperature T2 and to deliver on the basis thereof an acoustic velocity signal (14) to the calculation unit (10), which is adapted to comparing v 1 and v 2 with respective first and second velocity reference values vref1 and v ref 2 for a reference liquid at the respective temperatures T1 and T2. On the basis of the result of the comparison an indicating signal (18) is generated to the effect that the liquid is approved if the measured values v 1 and v 2 are within approved velocity ranges for the reference values, but not approved if v 1 and v 2 are not within a said approved velocity ranges.
Abstract:
The invention relates to a method for testing a temperature sensor which comprises a temperature-dependent resistor (R2). The method comprises the steps of - determining the resistance R t1 for R2, - applying to the resistor R2 a voltage pulse with a predetermined voltage amplitude U t and a predetermined duration T, - determining the resistance R t2 for R2 after the voltage pulse, - determining the absolute value of the resistance difference AR = | R t1 - R t2 |, - comparing AR with one or more threshold values (TR1, TR2,...), - generating on the basis of the result of the comparison a test signal which represents the result of the testing of the temperature sensor.
Abstract:
Temperature measurement system comprising at least one thermocouple with a measuring portion (2) and a reference portion (4) which presents a reference temperature TREF for the thermocouple, which system comprises a temperature measurement circuit (6) adapted to determining the temperature difference between the measuring portion and the reference portion and to determining on the basis thereof the temperature for the measuring portion. The system comprises, a temperature sensor (8) situated close to the reference portion and adapted to measuring a spot temperature T OBD , and the system further comprises a calculation unit ( 10) adapted to calculating ΔΤ = T REF - T 0BD , to comparing the absolute value of ΔΤ with one or more predetermined threshold levels (T THI , T TH2 ) and to generating a diagnosis signal ( 12) according to the result of the comparison.
Abstract:
The invention relates to a method for diagnosing an exhaust gas processing configuration for a combustion engine (231) of a vehicle (100), said configuration comprising two SCR-units (240, 250), two NO x -sensors (243, 253) and two reducing agent dosing units (237, 247) suitably arranged, comprising the steps of: - performing a series of reducing agent dosing operations by a first reducing agent dosing unit; - comparing measured NO x -contents (NOx1, NOx2) measured by a first NO x -sensor (243) and a second NO x -sensor (253) related to said operations; and - if the respective NO x -content measured by the respective NO x -sensors during the performed reducing agent dosing operations are substantially equal, considering that the respective NO x -sensors provide a proper performance. The invention relates also to a computer program product comprising program code (P) for a computer (200; 210; 500) for implementing a method according to the invention. The invention relates also to a system for diagnosing an exhaust gas processing configuration for a combustion engine (231) of a vehicle (100) and a motor vehicle (100) equipped with the system.
Abstract translation:本发明涉及诊断车辆(100)的内燃机(231)的排气处理结构的方法,所述结构包括两个SCR单元(240,250),两个NO (243,253)和两个适当布置的还原剂剂量单元(237,247),所述方法包括以下步骤: - 通过第一还原剂剂量单元(237,247)执行一系列还原剂剂量给药操作, ; - 比较由第一NO x传感器(243)和第二NO X传感器(243)测量的测得的NO x x-内容物(NO x 1,NO x 2) 传感器(253)与所述操作有关; 以及 - 如果在执行的还原剂剂量操作期间由相应的NOX传感器测量的各自的NOX-内容基本相等,考虑到相应的NOX-传感器, x-传感器提供了适当的性能。 本发明还涉及一种包括用于实现根据本发明的方法的计算机(200; 210; 500)的程序代码(P)的计算机程序产品。 本发明还涉及用于诊断车辆(100)的燃烧发动机(231)和配备有该系统的机动车辆(100)的排气处理配置的系统。 p>
Abstract:
A spring return throttle actuator (1) including: an electric, plural-coil (C1, C2, C3), DC motor (2) having an output shaft 4, a throttle return spring (10), a gear transmission (5) connected to the output shaft, a control unit (CPU) adapted to control power supply to the DC motor (2), wherein the spring return throttle actuator (1) has a movement range between closed throttle and opened throttle. The control unit (CPU) is arranged to short-circuit at least two DC motor coils (C1, C2, C3) in order to create a DC motor return resist torque, and the control unit (CPU) includes a movement monitoring circuit being arranged to monitor actuator movement forced by the throttle return spring (10) and resisted by the DC motor return resist torque. The invention also relates to a method and a throttle assembly.
Abstract:
A spring return throttle actuator (1) including: an electric, plural-coil (C1, C2, C3) DC motor (2) having an output shaft (4), a throttle return spring (10), a gear transmission (5) connected to the output shaft, a control unit (CPU) adapted to control power supply to the DC motor (2), wherein the spring return throttle actuator (1) has a movement range between closed throttle and fully opened throttle. The control unit (CPU) includes a monitoring circuit adapted to monitor DC motor movement. The monitoring circuit is arranged to receive signals from at least one voltage sensor adapted to sense voltage induced in at least one of the DC motor coils (C1, C2, C3) during a spring forced return of the throttle, and the monitoring circuit is arranged to create a representation of DC motor movement based on said signals.