摘要:
An object of the present invention is to provide a construction machine that can reduce particulate matter (PM) or nitrogen oxide (NOx) discharged from an internal combustion engine mounted on the construction machine. The construction machine 200 includes a diesel engine 101 controlled based on a torque command, an electric motor 102 mechanically connected to the diesel engine, an electric energy storage device 111 that supplies electric power to the electric motor, and a hydraulic pump 103. The construction machine performs work by driving the hydraulic pump using the diesel engine and the electric motor. A speed control device 118 controls a speed of the electric motor 102 based on a speed command. A torque limiter 115 obtains the torque command having a rate of change with time limited based on a torque target.
摘要:
A torque control device for use in a hybrid vehicle having an electric generator (2) driven by an internal combustion engine (1) is provided with: a command value calculation means that calculates an engine torque command value and a rotation speed command value of a generator (2) based on a target electric power generated by the generator (2) and sets in accordance with the running state of the hybrid vehicle; a generator torque command value calculation means that calculates a generator torque command value for causing the rotation speed calculation value to match the rotation speed command value; a generator control means that controls the generator (2) based on the generator torque command value; a rotation speed detection means that detects a rotation speed of the generator (2); and a pulsation removal filter that removes a pulsation component of the rotation speed due to the pulsation of the engine (1) from the rotation speed detection value detected by the rotation speed detection means to calculate the rotation speed calculation value.
摘要:
A method for determining road bank angle in a vehicle inlcludes a lateral acceleration sensor (22) that generates a lateral acceleration signal. A yaw rate sensor (18) generates a yaw rate signal. A roll rate sensor (24) generates a yaw rate signal. A controller (14) coupled to the sensors calculates a first roll angle signal in response to the roll rate signal and calculates a second roll angle signal corresponding to a suspension reference roll angle in response to the lateral acceleration signal. The controller calculates a bank angle signal in response to the lateral acceleration signal, the yaw rate signal, the steering wheel signal and the speed signal. The controller sums the first roll angle signal, the second roll angle signal and the bank angle signal to obtain a final roll angle estimate.
摘要:
The apparatus and method of the present invention improves precision of measuring a yaw rate by mutually making up for a drawback of a yaw rate sensor for directly measuring the yaw rate and a drawback of a structure for estimating the yaw rate. An estimated yaw rate operation element (51) gives an estimated yaw rate γe based on a steering angle θf of front wheels, a vehicle speed V, a left front wheel speed vFL, and a right front wheel speed vFR measured by respective sensors (41-47). A low-pass filter (53) eliminates a high frequency component included in the signal of estimated yaw rate γe, while a high-pass filter (55) eliminates a low frequency component included in a signal of measured yaw rate gs measured by a yaw rate sensor (49). An adder (57) compounds an output signal of the low-pass filter (53) with an output signal of the high-pass filter (55). A resulting yaw rate output from the adder (57) includes a component of the estimated yaw rate γe in a low frequency domain where the yaw rate sensor has large or serious measurement errors due to a zero-point drift or the like, and a component of the measured yaw rate gs in a high frequency domain where the estimated yaw rate has large or serious estimation errors.
摘要:
A torque control device for use in a hybrid vehicle having an electric generator (2) driven by an internal combustion engine (1) is provided with: a command value calculation means that calculates an engine torque command value and a rotation speed command value of a generator (2) based on a target electric power generated by the generator (2) and sets in accordance with the running state of the hybrid vehicle; a generator torque command value calculation means that calculates a generator torque command value for causing the rotation speed calculation value to match the rotation speed command value; a generator control means that controls the generator (2) based on the generator torque command value; a rotation speed detection means that detects a rotation speed of the generator (2); and a pulsation removal filter that removes a pulsation component of the rotation speed due to the pulsation of the engine (1) from the rotation speed detection value detected by the rotation speed detection means to calculate the rotation speed calculation value.
摘要:
A method for determining road bank angle in a vehicle inlcludes a lateral acceleration sensor (22) that generates a lateral acceleration signal. A yaw rate sensor (18) generates a yaw rate signal. A roll rate sensor (24) generates a yaw rate signal. A controller (14) coupled to the sensors calculates a first roll angle signal in response to the roll rate signal and calculates a second roll angle signal corresponding to a suspension reference roll angle in response to the lateral acceleration signal. The controller calculates a bank angle signal in response to the lateral acceleration signal, the yaw rate signal, the steering wheel signal and the speed signal. The controller sums the first roll angle signal, the second roll angle signal and the bank angle signal to obtain a final roll angle estimate.
摘要:
The apparatus and method of the present invention improves precision of measuring a yaw rate by mutually making up for a drawback of a yaw rate sensor for directly measuring the yaw rate and a drawback of a structure for estimating the yaw rate. An estimated yaw rate operation element (51) gives an estimated yaw rate γe based on a steering angle θf of front wheels, a vehicle speed V, a left front wheel speed vFL, and a right front wheel speed vFR measured by respective sensors (41-47). A low-pass filter (53) eliminates a high frequency component included in the signal of estimated yaw rate γe, while a high-pass filter (55) eliminates a low frequency component included in a signal of measured yaw rate gs measured by a yaw rate sensor (49). An adder (57) compounds an output signal of the low-pass filter (53) with an output signal of the high-pass filter (55). A resulting yaw rate output from the adder (57) includes a component of the estimated yaw rate γe in a low frequency domain where the yaw rate sensor has large or serious measurement errors due to a zero-point drift or the like, and a component of the measured yaw rate gs in a high frequency domain where the estimated yaw rate has large or serious estimation errors.
摘要:
Described herein is a device for detecting the attitude of motor vehicles, which comprises using at least one filter of a complementary type for computing an estimate (x̂ i ) of angles of attitude (θ, ϕ, ψ) of the motor vehicle as a function of input signals comprising an acceleration signal (A) and an angular-velocity signal (ω). According to the invention, the device (10) comprises a plurality of complementary filters (12 1 , ..., 12 n ), each tuned for operating in a specific dynamic range, and a supervisor unit (11), configured for recognising the dynamic range of the input signals (A, ω) and selecting a corresponding filter (12 i ) from said plurality of complementary filters (12 1 , ..., 12 n ).
摘要:
A turning-characteristic estimating unit 11 of an ECU 1 estimates a stability factor Kh and a steering-response time constant coefficient Tp that are parameter values related to turning characteristics of a vehicle 10. A standard yaw rate YrStd of the vehicle 10 is calculated using the estimation values of the stability factor Kh and the steering-response time constant coefficient Tp estimated by the turning-characteristic estimating unit 11. A validity determining unit 12 of the ECU 1 determines the validity of the estimation values based on the standard yaw rate YrStd and an actual yaw rate Yr of the vehicle 10. This allows improving the estimation accuracy of the stability factor Kh and the steering-response time constant coefficient Tp.