\u5b8f\u8679\u514d\u62c6\u8a3a\u65b7 | 2008 \u5e74 BMW X5 3.0Si K-CAN \u532f\u6d41\u6392\u6545\u969c\u8a3a\u65b7\u8207\u4fee\u5fa9<\/title>\r\n <link rel=\"stylesheet\" href=\"styles.css\">\r\n<\/head>\r\n<body>\r\n <div class=\"product-content\">\r\n <div class=\"product-header\">\r\n <h1>\u5b8f\u8679\u8a3a\u65b7 | 2015 \u746a\u838e\u62c9\u8482\r\n GT \u65bc 80 km\/h \u51fa\u73fe\u300c\u55e1\u9cf4\u8072\u300d\u4e4b\u632f\u52d5\u566a\u97f3\u5206\u6790<\/h1>\r\n <\/div>\r\n\r\n <div class=\"product-section\">\r\n <h2 class=\"custom-title\">Failure phenomenon<\/h2>\r\n <p>\u4e00\u8f1b 2015 \u5e74\u5f0f \u746a\u838e\u62c9\u8482\r\n GT\uff0c\u642d\u8f09 M139P \u5f15\u64ce\uff0c\u7d2f\u8a08\u884c\u99db\u91cc\u7a0b\u7d04 13 \u842c\u516c\u91cc\u3002\u8eca\u4e3b\u53cd\u6620\uff1a\r\n<strong style=\"color: #0E407E;\">A \"humming\" sound occurs when the vehicle accelerates to about 80 km\/h.<\/strong>Replaced 4 tires, but the noise problem still exists.<\/p>\r\n <p>\r\n \r\n \r\n <\/div>\r\n\r\n <div class=\"product-section\">\r\n <h2 class=\"custom-title\">NVH Troubleshooting<\/h2>\r\n <p>The technician uses the Acer Pico NVH diagnostic equipment to install the three-axis acceleration sensors on each of the three axes:\r\n <strong style=\"color: #0E407E;\">Driver's side seat rails, microphone fixed to the inner compartment<\/strong> <\/strong>\u3002\r\n\r\n \u9032\u884c\u9053\u8def\u6e2c\u8a66\u5f8c\u767c\u73fe\uff1a\r\n<strong style=\"color: #0E407E;\">The noise is most noticeable at approx. 80 km\/h and is accompanied by a slight acceleration.\r\n <p>\r\n <img decoding=\"async\" src=\"https:\/\/hongtronics.com\/wp-content\/uploads\/2025\/12\/\u57161_NVH\u6ce2\u5f62.jpg\">\r\n <p class=\"img-source\">Fig. 1\uff5cNVH Waveform<\/p>\r\n <p>\r\n\r\n\r\n<\/strong>\r\n<p>NVH waveform analysis: The collected NVH waveform is shown in Figure 1. When the noise is generated, the microphone signal (yellow color) shows a clear spike with a frequency of about 586 Hz and a sound intensity of 54.9 dB, accompanied by an obvious vibration response. In addition, the frequency of the spike varies with vehicle speed: when the vehicle speed increases slightly, the spike moves to the right and the frequency increases; when the vehicle speed decreases, the spike moves to the left and the frequency decreases. Conclusion: <strong style=\"color: #0E407E;\"><p>1. Detects clear 586 Hz aliasing peaks.<p>2. Sound pressure up to 54.9 dB<p>3. The characteristic of \"stable tuning\" of the echoes, which increases in tandem with the increase in vehicle speed.<p>4. Frequency and sound pattern are in accordance with typical mechanical resonance noise.<\/strong>\r\n <p>The technician further used the \"Band Pass Filter\" function (retaining 520-610 Hz) to convert the microphone's continuous signal into an audio file and played it back to confirm that the band sound matched the owner's description of the anomaly.\r\n \r\n <img decoding=\"async\" src=\"https:\/\/hongtronics.com\/wp-content\/uploads\/2025\/12\/\u57162_\u97f3\u983b\u6587\u4ef6.jpg\">\r\n <p class=\"img-source\">Fig. 2\uff5cAudio File Link ( Open WeChat and scan to listen )<\/p>\r\n <p>\r\n \r\n \r\n And then.<strong style=\"color: #0E407E;\">Use the 3-axis accelerometer as a microphone.<\/strong>The following are some examples of sequential measurements:\r\n\r\n<strong style=\"color: #0E407E;\"><p>1. Automatic transmission housing\r\n\r\n<p>2. Rear Differential Body<p>3. Drive shaft suspension bracket<p>4. Wheel bearing position<\/strong>\r\n<p>\r\n\r\n<img decoding=\"async\" src=\"https:\/\/hongtronics.com\/wp-content\/uploads\/2025\/12\/\u57163_\u5f8c\u5dee\u901f\u5668\u8207\u50b3\u52d5\u8ef8\u904e\u6a4b\u8ef8\u627f\u4e0a\u7684-NVH-\u6ce2\u5f62.webp\">\r\n <p class=\"img-source\">Fig. 3\uff5cNVH Waveforms on Rear Differential and Drive Axle Over-axle Bearing<\/p>\r\n <p><p>The test results show that:<strong style=\"color: #0E407E;\">The vibration signal is most pronounced at the rear differential position (Fig. 3).<\/strong>\uff0c\u800c\u4e14\u7570\u97f3\u983b\u7387\u8207\u524d\u6bb5\u5206\u6790\u5b8c\u5168\u4e00\u81f4\u3002\r\n\r\n\u56e0\u6b64\u63a8\u8ad6\uff1a<strong style=\"color: #0E407E;\">The source of the noise is the mechanical vibration and resonance noise generated by the rear differential.<\/strong>\r\n\r\n\r\n\r\n\r\n <div class=\"product-section\">\r\n <h2 class=\"custom-title\">fault resolution<\/h2>\r\n <p>change<strong style=\"color: #0E407E;\">Rear Differential Assembly<\/strong>\u5f8c\u9032\u884c\u56de\u5ee0\u9053\u8def\u6e2c\u8a66\uff0c\r\n\u300c\u55e1\u55e1\u300d\u8f5f\u9cf4\u8072\u5b8c\u5168\u6d88\u5931\uff0c\u6545\u969c\u6210\u529f\u6392\u9664\u3002\r\n\r\n \r\n \r\n \r\n\r\n <div class=\"product-section\">\r\n <h2 class=\"custom-title\">Fault Summary<\/h2>\r\n <p>\u672c\u6848\u4f8b\u900f\u904e Pico NVH \u8a3a\u65b7\u5de5\u5177\u7684\u7cbe\u6e96\u91cf\u6e2c\u8207\u983b\u7387\u5206\u6790\uff0c\u6210\u529f\u5c07\u770b\u4f3c\u8907\u96dc\u7684\u7570\u97f3\u554f\u984c\u6e05\u695a\u91cf\u5316\uff0c\u4e26\u9010\u6b65\u9396\u5b9a\u771f\u6b63\u7684\u566a\u97f3\u4f86\u6e90\u3002\u5f9e\u9053\u8def\u6e2c\u8a66\u3001\u983b\u6bb5\u904e\u6ffe\u3001\u6ce2\u5f62\u6bd4\u5c0d\uff0c\u5230\u6700\u7d42\u78ba\u8a8d\u5f8c\u5dee\u901f\u5668\u7684\u7570\u5e38\uff0c\u518d\u5230\u5be6\u969b\u66f4\u63db\u5f8c\u5b8c\u6210\u6392\u9664\uff0c\u6574\u500b\u904e\u7a0b\u5c55\u73fe\u51fa\u7cfb\u7d71\u5316 NVH \u8a3a\u65b7\u5728\u8eca\u8f1b\u7dad\u4fee\u4e2d\u7684\u9ad8\u6548\u6027\u8207\u53ef\u9760\u6027\u3002\r\n\r\n\u5c0d\u6280\u5e2b\u800c\u8a00\uff0c\u7570\u97f3\u4f86\u6e90\u5f80\u5f80\u4e0d\u5bb9\u6613\u4ee5\u8089\u8033\u5224\u65b7\uff1b\u4f46\u900f\u904e\u79d1\u5b78\u5316\u7684 NVH \u5de5\u5177\uff0c\u5373\u53ef\u5c07\u300c\u807d\u4e0d\u898b\u7684\u7d30\u7bc0\u300d\u8f49\u70ba\u53ef\u8996\u5316\u6578\u64da\uff0c\u4f7f\u6545\u969c\u5b9a\u4f4d\u66f4\u5feb\u901f\u3001\u66f4\u5177\u8aaa\u670d\u529b\uff0c\u4e5f\u80fd\u6709\u6548\u964d\u4f4e\u8aa4\u62c6\u3001\u8aa4\u5224\u5e36\u4f86\u7684\u6210\u672c\u3002\u672a\u4f86\u7121\u8ad6\u5728\u8eca\u8f1b\u4fdd\u4fee\u3001\u7570\u97f3\u5206\u6790\u6216\u54c1\u8cea\u9a57\u8b49\u9818\u57df\uff0cNVH \u8a3a\u65b7\u90fd\u5c07\u6301\u7e8c\u6210\u70ba\u4e0d\u53ef\u6216\u7f3a\u7684\u91cd\u8981\u6280\u8853\u3002<\/p>\r\n <\/div>\r\n\r\n <footer class=\"product-footer\">\r\n <div class=\"additional-info\">\r\n <p class=\"interest-message\"><strong style=\"color: #0E407E;\">If you are interested, you are welcome to follow us for more information about the article, and if you have any questions.<a href=\"https:\/\/line.me\/R\/ti\/p\/@433rhnwm\">Feel free to contact us as well!<\/a><\/strong><\/p>\r\n <div class=\"related-articles\">\r\n <h3>Extended Reading:<\/h3>\r\n <ul>\r\n <li><a href=\"https:\/\/hongtronics.com\/en\/picoscope-com-land-rover-freelander2-can-bus-fault-diagnosis\/\">\u27a2\u3010Pico Automotive Diagnostic Case\u3011Pico Oscilloscope Helps You Easily Solve Land Rover Freelander 2's Mid-Speed CAN Bus Failure<\/a><\/li>\r\n <li><a href=\"https:\/\/hongtronics.com\/en\/car-window-glass-lifting-problem\/\">\u27a2\u3010Pico Auto Diagnostic Case\u30112014 Maserati Ghibli Driver's Side Window Cannot Be Raised or Lowered<\/a><\/li>\r\n <\/ul>\r\n <\/div>\r\n <\/div>\r\n <\/footer>\r\n <\/div>\r\n<\/body>\r\n<\/html>\r\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4da4bc0 elementor-widget elementor-widget-image\" data-id=\"4da4bc0\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1024\" height=\"197\" src=\"https:\/\/hongtronics.com\/wp-content\/uploads\/2024\/06\/\u516c\u53f8\u8cc7\u8a0a\u6b04_\u8cc7\u8a0a\u5361-\u592702-1.png\" class=\"attachment-large size-large wp-image-40098\" alt=\"\" srcset=\"https:\/\/hongtronics.com\/wp-content\/uploads\/2024\/06\/\u516c\u53f8\u8cc7\u8a0a\u6b04_\u8cc7\u8a0a\u5361-\u592702-1.png 1024w, https:\/\/hongtronics.com\/wp-content\/uploads\/2024\/06\/\u516c\u53f8\u8cc7\u8a0a\u6b04_\u8cc7\u8a0a\u5361-\u592702-1-300x58.png 300w, https:\/\/hongtronics.com\/wp-content\/uploads\/2024\/06\/\u516c\u53f8\u8cc7\u8a0a\u6b04_\u8cc7\u8a0a\u5361-\u592702-1-768x148.png 768w, https:\/\/hongtronics.com\/wp-content\/uploads\/2024\/06\/\u516c\u53f8\u8cc7\u8a0a\u6b04_\u8cc7\u8a0a\u5361-\u592702-1-600x115.png 600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>\u5b8f\u8679\u514d\u62c6\u8a3a\u65b7 | 2008 \u5e74 BMW X5 3.0Si K-CAN \u532f\u6d41\u6392\u6545\u969c\u8a3a\u65b7\u8207\u4fee\u5fa9 \u5b8f\u8679\u8a3a\u65b7 | 20 […]<\/p>","protected":false},"author":46,"featured_media":77352,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_eb_attr":"","ocean_post_layout":"","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"","ocean_second_sidebar":"","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"","ocean_custom_header_template":"","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"","ocean_menu_typo_font_family":"","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"default","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"default","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"","iawp_total_views":30,"ocean_post_oembed":"","ocean_post_self_hosted_media":"","ocean_post_video_embed":"","ocean_link_format":"","ocean_link_format_target":"self","ocean_quote_format":"","ocean_quote_format_link":"post","ocean_gallery_link_images":"on","ocean_gallery_id":[],"footnotes":""},"categories":[2295],"tags":[3396,378,4036,1570,376,3400],"table_tags":[],"class_list":["post-77335","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-2295","tag-pico-","tag-pico","tag-4036","tag-1570","tag-376","tag-3400","entry","has-media","owp-thumbs-layout-horizontal","owp-btn-normal","owp-tabs-layout-horizontal","has-no-thumbnails","has-product-nav"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t<meta name=\"description\" content=\"2015\u6b3e\u7684 Maserati GT \u5728\u7d04 80 km\/h \u51fa\u73fe\u660e\u986f\u300c\u55e1\u9cf4\u8072\u300d\u3002\u672c\u6848\u4f8b\u900f\u904e Pico NVH \u8a3a\u65b7\u5de5\u5177\u9032\u884c\u9053\u8def\u6e2c\u8a66\u8207\u983b\u7387\u5206\u6790\uff0c\u9010\u6b65\u5b9a\u4f4d\u7570\u97f3\u4f86\u6e90\uff0c\u6700\u7d42\u78ba\u8a8d\u70ba\u5f8c\u5dee\u901f\u5668\u7522\u751f\u7684\u5171\u632f\u566a\u97f3\u3002\u900f\u904e\u66f4\u63db\u5f8c\u5dee\u901f\u5668\u7e3d\u6210\uff0c\u6210\u529f\u6392\u9664\u7570\u97f3\u3002\u672c\u7bc7\u5c07\u8a73\u8ff0\u8a3a\u65b7\u6d41\u7a0b\u3001\u6ce2\u5f62\u5224\u8b80\u8207\u554f\u984c\u6839\u56e0\uff0c\u5354\u52a9\u6280\u5e2b\u5feb\u901f\u638c\u63e1\u5be6\u52d9 NVH \u5206\u6790\u8981\u9818\u3002\" \/>\n\t<meta name=\"robots\" content=\"max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n\t<meta name=\"author\" content=\"Sharon Chen\"\/>\n\t<meta name=\"google-site-verification\" 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02:13:58","updated":"2025-12-01 02:51:24","seo_analyzer_scan_date":null},"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/hongtronics.com\/en\" title=\"\u4e3b\u9801\">\u4e3b\u9801<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">\u00bb<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/hongtronics.com\/en\/category\/%e6%b1%bd%e8%bb%8a%e7%a4%ba%e6%b3%a2%e5%99%a8%e5%85%8d%e6%8b%86%e8%a8%ba%e6%96%b7\/\" title=\"\u6c7d\u8eca\u793a\u6ce2\u5668\u514d\u62c6\u8a3a\u65b7\">\u6c7d\u8eca\u793a\u6ce2\u5668\u514d\u62c6\u8a3a\u65b7<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">\u00bb<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t\u3010Pico\u6c7d\u8eca\u8a3a\u65b7\u6848\u4f8b\u30112015\u6b3e\u746a\u838e\u62c9\u8482 GT \u65bc 80 km\/h \u51fa\u73fe\u300c\u55e1\u9cf4\u8072\u300d\u4e4b\u632f\u52d5\u566a\u97f3\u5206\u6790\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"\u4e3b\u9801","link":"https:\/\/hongtronics.com\/en"},{"label":"\u6c7d\u8eca\u793a\u6ce2\u5668\u514d\u62c6\u8a3a\u65b7","link":"https:\/\/hongtronics.com\/en\/category\/%e6%b1%bd%e8%bb%8a%e7%a4%ba%e6%b3%a2%e5%99%a8%e5%85%8d%e6%8b%86%e8%a8%ba%e6%96%b7\/"},{"label":"\u3010Pico\u6c7d\u8eca\u8a3a\u65b7\u6848\u4f8b\u30112015\u6b3e\u746a\u838e\u62c9\u8482 GT \u65bc 80 km\/h \u51fa\u73fe\u300c\u55e1\u9cf4\u8072\u300d\u4e4b\u632f\u52d5\u566a\u97f3\u5206\u6790","link":"https:\/\/hongtronics.com\/en\/nvh-maserati-gt-80kmh-noise-diagnosis\/"}],"jetpack_featured_media_url":"https:\/\/hongtronics.com\/wp-content\/uploads\/2025\/12\/2015-Maserati-GT.webp","_links":{"self":[{"href":"https:\/\/hongtronics.com\/en\/wp-json\/wp\/v2\/posts\/77335","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hongtronics.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hongtronics.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hongtronics.com\/en\/wp-json\/wp\/v2\/users\/46"}],"replies":[{"embeddable":true,"href":"https:\/\/hongtronics.com\/en\/wp-json\/wp\/v2\/comments?post=77335"}],"version-history":[{"count":20,"href":"https:\/\/hongtronics.com\/en\/wp-json\/wp\/v2\/posts\/77335\/revisions"}],"predecessor-version":[{"id":77362,"href":"https:\/\/hongtronics.com\/en\/wp-json\/wp\/v2\/posts\/77335\/revisions\/77362"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hongtronics.com\/en\/wp-json\/wp\/v2\/media\/77352"}],"wp:attachment":[{"href":"https:\/\/hongtronics.com\/en\/wp-json\/wp\/v2\/media?parent=77335"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hongtronics.com\/en\/wp-json\/wp\/v2\/categories?post=77335"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hongtronics.com\/en\/wp-json\/wp\/v2\/tags?post=77335"},{"taxonomy":"table_tags","embeddable":true,"href":"https:\/\/hongtronics.com\/en\/wp-json\/wp\/v2\/table_tags?post=77335"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t $\"PicoAuto\u6c7d\u8eca\u793a\u6ce2\u5668\uff0c\u514d\u62c6\u8a3a\u65b7\u3001\u5feb\u901f\u4fee\u8eca\"$ \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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\n\t\t\t\t\t\r\n\r\n\r\n \r\n \r\n \u5b8f\u8679\u514d\u62c6\u8a3a\u65b7 | 2008 \u5e74 BMW X5 3.0Si K-CAN \u532f\u6d41\u6392\u6545\u969c\u8a3a\u65b7\u8207\u4fee\u5fa9<\/title>\r\n <link rel=\"stylesheet\" href=\"styles.css\">\r\n<\/head>\r\n<body>\r\n <div class=\"product-content\">\r\n <div class=\"product-header\">\r\n <h1>\u5b8f\u8679\u8a3a\u65b7 | 2015 \u746a\u838e\u62c9\u8482\r\n GT \u65bc 80 km\/h \u51fa\u73fe\u300c\u55e1\u9cf4\u8072\u300d\u4e4b\u632f\u52d5\u566a\u97f3\u5206\u6790<\/h1>\r\n <\/div>\r\n\r\n <div class=\"product-section\">\r\n <h2 class=\"custom-title\">Failure phenomenon<\/h2>\r\n <p>\u4e00\u8f1b 2015 \u5e74\u5f0f \u746a\u838e\u62c9\u8482\r\n GT\uff0c\u642d\u8f09 M139P \u5f15\u64ce\uff0c\u7d2f\u8a08\u884c\u99db\u91cc\u7a0b\u7d04 13 \u842c\u516c\u91cc\u3002\u8eca\u4e3b\u53cd\u6620\uff1a\r\n<strong style=\"color: #0E407E;\">A \"humming\" sound occurs when the vehicle accelerates to about 80 km\/h.<\/strong>Replaced 4 tires, but the noise problem still exists.<\/p>\r\n <p>\r\n \r\n \r\n <\/div>\r\n\r\n <div class=\"product-section\">\r\n <h2 class=\"custom-title\">NVH Troubleshooting<\/h2>\r\n <p>The technician uses the Acer Pico NVH diagnostic equipment to install the three-axis acceleration sensors on each of the three axes:\r\n <strong style=\"color: #0E407E;\">Driver's side seat rails, microphone fixed to the inner compartment<\/strong> <\/strong>\u3002\r\n\r\n \u9032\u884c\u9053\u8def\u6e2c\u8a66\u5f8c\u767c\u73fe\uff1a\r\n<strong style=\"color: #0E407E;\">The noise is most noticeable at approx. 80 km\/h and is accompanied by a slight acceleration.\r\n <p>\r\n <img decoding=\"async\" src=\"https:\/\/hongtronics.com\/wp-content\/uploads\/2025\/12\/\u57161_NVH\u6ce2\u5f62.jpg\">\r\n <p class=\"img-source\">Fig. 1\uff5cNVH Waveform<\/p>\r\n <p>\r\n\r\n\r\n<\/strong>\r\n<p>NVH waveform analysis: The collected NVH waveform is shown in Figure 1. When the noise is generated, the microphone signal (yellow color) shows a clear spike with a frequency of about 586 Hz and a sound intensity of 54.9 dB, accompanied by an obvious vibration response. In addition, the frequency of the spike varies with vehicle speed: when the vehicle speed increases slightly, the spike moves to the right and the frequency increases; when the vehicle speed decreases, the spike moves to the left and the frequency decreases. Conclusion: <strong style=\"color: #0E407E;\"><p>1. Detects clear 586 Hz aliasing peaks.<p>2. Sound pressure up to 54.9 dB<p>3. The characteristic of \"stable tuning\" of the echoes, which increases in tandem with the increase in vehicle speed.<p>4. Frequency and sound pattern are in accordance with typical mechanical resonance noise.<\/strong>\r\n <p>The technician further used the \"Band Pass Filter\" function (retaining 520-610 Hz) to convert the microphone's continuous signal into an audio file and played it back to confirm that the band sound matched the owner's description of the anomaly.\r\n \r\n <img decoding=\"async\" src=\"https:\/\/hongtronics.com\/wp-content\/uploads\/2025\/12\/\u57162_\u97f3\u983b\u6587\u4ef6.jpg\">\r\n <p class=\"img-source\">Fig. 2\uff5cAudio File Link ( Open WeChat and scan to listen )<\/p>\r\n <p>\r\n \r\n \r\n And then.<strong style=\"color: #0E407E;\">Use the 3-axis accelerometer as a microphone.<\/strong>The following are some examples of sequential measurements:\r\n\r\n<strong style=\"color: #0E407E;\"><p>1. Automatic transmission housing\r\n\r\n<p>2. Rear Differential Body<p>3. Drive shaft suspension bracket<p>4. Wheel bearing position<\/strong>\r\n<p>\r\n\r\n<img decoding=\"async\" src=\"https:\/\/hongtronics.com\/wp-content\/uploads\/2025\/12\/\u57163_\u5f8c\u5dee\u901f\u5668\u8207\u50b3\u52d5\u8ef8\u904e\u6a4b\u8ef8\u627f\u4e0a\u7684-NVH-\u6ce2\u5f62.webp\">\r\n <p class=\"img-source\">Fig. 3\uff5cNVH Waveforms on Rear Differential and Drive Axle Over-axle Bearing<\/p>\r\n <p><p>The test results show that:<strong style=\"color: #0E407E;\">The vibration signal is most pronounced at the rear differential position (Fig. 3).<\/strong>\uff0c\u800c\u4e14\u7570\u97f3\u983b\u7387\u8207\u524d\u6bb5\u5206\u6790\u5b8c\u5168\u4e00\u81f4\u3002\r\n\r\n\u56e0\u6b64\u63a8\u8ad6\uff1a<strong style=\"color: #0E407E;\">The source of the noise is the mechanical vibration and resonance noise generated by the rear differential.<\/strong>\r\n\r\n\r\n\r\n\r\n <div class=\"product-section\">\r\n <h2 class=\"custom-title\">fault resolution<\/h2>\r\n <p>change<strong style=\"color: #0E407E;\">Rear Differential Assembly<\/strong>\u5f8c\u9032\u884c\u56de\u5ee0\u9053\u8def\u6e2c\u8a66\uff0c\r\n\u300c\u55e1\u55e1\u300d\u8f5f\u9cf4\u8072\u5b8c\u5168\u6d88\u5931\uff0c\u6545\u969c\u6210\u529f\u6392\u9664\u3002\r\n\r\n \r\n \r\n \r\n\r\n <div class=\"product-section\">\r\n <h2 class=\"custom-title\">Fault Summary<\/h2>\r\n <p>\u672c\u6848\u4f8b\u900f\u904e Pico NVH \u8a3a\u65b7\u5de5\u5177\u7684\u7cbe\u6e96\u91cf\u6e2c\u8207\u983b\u7387\u5206\u6790\uff0c\u6210\u529f\u5c07\u770b\u4f3c\u8907\u96dc\u7684\u7570\u97f3\u554f\u984c\u6e05\u695a\u91cf\u5316\uff0c\u4e26\u9010\u6b65\u9396\u5b9a\u771f\u6b63\u7684\u566a\u97f3\u4f86\u6e90\u3002\u5f9e\u9053\u8def\u6e2c\u8a66\u3001\u983b\u6bb5\u904e\u6ffe\u3001\u6ce2\u5f62\u6bd4\u5c0d\uff0c\u5230\u6700\u7d42\u78ba\u8a8d\u5f8c\u5dee\u901f\u5668\u7684\u7570\u5e38\uff0c\u518d\u5230\u5be6\u969b\u66f4\u63db\u5f8c\u5b8c\u6210\u6392\u9664\uff0c\u6574\u500b\u904e\u7a0b\u5c55\u73fe\u51fa\u7cfb\u7d71\u5316 NVH \u8a3a\u65b7\u5728\u8eca\u8f1b\u7dad\u4fee\u4e2d\u7684\u9ad8\u6548\u6027\u8207\u53ef\u9760\u6027\u3002\r\n\r\n\u5c0d\u6280\u5e2b\u800c\u8a00\uff0c\u7570\u97f3\u4f86\u6e90\u5f80\u5f80\u4e0d\u5bb9\u6613\u4ee5\u8089\u8033\u5224\u65b7\uff1b\u4f46\u900f\u904e\u79d1\u5b78\u5316\u7684 NVH \u5de5\u5177\uff0c\u5373\u53ef\u5c07\u300c\u807d\u4e0d\u898b\u7684\u7d30\u7bc0\u300d\u8f49\u70ba\u53ef\u8996\u5316\u6578\u64da\uff0c\u4f7f\u6545\u969c\u5b9a\u4f4d\u66f4\u5feb\u901f\u3001\u66f4\u5177\u8aaa\u670d\u529b\uff0c\u4e5f\u80fd\u6709\u6548\u964d\u4f4e\u8aa4\u62c6\u3001\u8aa4\u5224\u5e36\u4f86\u7684\u6210\u672c\u3002\u672a\u4f86\u7121\u8ad6\u5728\u8eca\u8f1b\u4fdd\u4fee\u3001\u7570\u97f3\u5206\u6790\u6216\u54c1\u8cea\u9a57\u8b49\u9818\u57df\uff0cNVH \u8a3a\u65b7\u90fd\u5c07\u6301\u7e8c\u6210\u70ba\u4e0d\u53ef\u6216\u7f3a\u7684\u91cd\u8981\u6280\u8853\u3002<\/p>\r\n <\/div>\r\n\r\n <footer class=\"product-footer\">\r\n <div class=\"additional-info\">\r\n <p class=\"interest-message\"><strong style=\"color: #0E407E;\">If you are interested, you are welcome to follow us for more information about the article, and if you have any questions.<a href=\"https:\/\/line.me\/R\/ti\/p\/@433rhnwm\">Feel free to contact us as well!<\/a><\/strong><\/p>\r\n <div class=\"related-articles\">\r\n <h3>Extended Reading:<\/h3>\r\n <ul>\r\n <li><a href=\"https:\/\/hongtronics.com\/en\/picoscope-com-land-rover-freelander2-can-bus-fault-diagnosis\/\">\u27a2\u3010Pico Automotive Diagnostic Case\u3011Pico Oscilloscope Helps You Easily Solve Land Rover Freelander 2's Mid-Speed CAN Bus Failure<\/a><\/li>\r\n <li><a href=\"https:\/\/hongtronics.com\/en\/car-window-glass-lifting-problem\/\">\u27a2\u3010Pico Auto Diagnostic Case\u30112014 Maserati Ghibli Driver's Side Window Cannot Be Raised or Lowered<\/a><\/li>\r\n <\/ul>\r\n <\/div>\r\n <\/div>\r\n <\/footer>\r\n <\/div>\r\n<\/body>\r\n<\/html>\r\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4da4bc0 elementor-widget elementor-widget-image\" data-id=\"4da4bc0\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1024\" height=\"197\" src=\"https:\/\/hongtronics.com\/wp-content\/uploads\/2024\/06\/\u516c\u53f8\u8cc7\u8a0a\u6b04_\u8cc7\u8a0a\u5361-\u592702-1.png\" class=\"attachment-large size-large wp-image-40098\" alt=\"\" srcset=\"https:\/\/hongtronics.com\/wp-content\/uploads\/2024\/06\/\u516c\u53f8\u8cc7\u8a0a\u6b04_\u8cc7\u8a0a\u5361-\u592702-1.png 1024w, https:\/\/hongtronics.com\/wp-content\/uploads\/2024\/06\/\u516c\u53f8\u8cc7\u8a0a\u6b04_\u8cc7\u8a0a\u5361-\u592702-1-300x58.png 300w, https:\/\/hongtronics.com\/wp-content\/uploads\/2024\/06\/\u516c\u53f8\u8cc7\u8a0a\u6b04_\u8cc7\u8a0a\u5361-\u592702-1-768x148.png 768w, https:\/\/hongtronics.com\/wp-content\/uploads\/2024\/06\/\u516c\u53f8\u8cc7\u8a0a\u6b04_\u8cc7\u8a0a\u5361-\u592702-1-600x115.png 600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>\u5b8f\u8679\u514d\u62c6\u8a3a\u65b7 | 2008 \u5e74 BMW X5 3.0Si K-CAN \u532f\u6d41\u6392\u6545\u969c\u8a3a\u65b7\u8207\u4fee\u5fa9 \u5b8f\u8679\u8a3a\u65b7 | 20 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